added q_*.. d'oh

4 files changed, 3802 insertions, 3 deletions

diff --git a/src/game/bg_pmove.c b/src/game/bg_pmove.c
index 5d17b0be..a0c3c150 100644
--- a/src/game/bg_pmove.c
+++ b/src/game/bg_pmove.c
@@ -1486,10 +1486,19 @@ static void PM_GroundClimbTrace( void )
         if( !VectorCompare( trace.plane.normal, refNormal ) && !VectorCompare( surfNormal, refNormal ) &&
             !VectorCompare( trace.plane.normal, ceilingNormal ) && !VectorCompare( surfNormal, ceilingNormal ) )
         {
+          int dAngle;
           vectoangles( trace.plane.normal, toAngles );
           vectoangles( surfNormal, surfAngles );
 
-          pm->ps->delta_angles[1] -= ANGLE2SHORT( surfAngles[1] - toAngles[1] );
+          //pm->ps->delta_angles[ YAW ] -= ANGLE2SHORT( surfAngles[ YAW ] - toAngles[ YAW ] );
+          dAngle = ANGLE2SHORT( RAD2DEG( arccos( DotProduct( trace.plane.normal, surfNormal ) ) ) );
+          if( dAngle < 0 )
+            dAngle = -dAngle;
+
+          pm->ps->delta_angles[ YAW ] += dAngle;
+          
+          Com_Printf( "%1.0f ", surfAngles[ YAW ] - toAngles[ YAW ] );
+          Com_Printf( "%1.0f\n", RAD2DEG( arccos( DotProduct( trace.plane.normal, surfNormal ) ) ) );
         }
 
         //transition from wall to ceiling
@@ -2501,8 +2510,8 @@ void PM_UpdateViewAngles( playerState_t *ps, const usercmd_t *cmd ) {
 
     //-abs( rotAngle ).. sorta
     if( rotAngle > 0 )
-      rotAngle -= rotAngle*2;
-
+      rotAngle = -rotAngle;
+      
     //hmmm could get away with only one rotation and some clever stuff later... but i'm lazy
     RotatePointAroundVector( rotaxis[0], xNormal, axis[0], rotAngle );
     RotatePointAroundVector( rotaxis[1], xNormal, axis[1], rotAngle );
diff --git a/src/game/q_math.c b/src/game/q_math.c
new file mode 100644
index 00000000..324418e5
--- /dev/null
+++ b/src/game/q_math.c
@@ -0,0 +1,1355 @@
+// Copyright (C) 1999-2000 Id Software, Inc.
+//
+// q_math.c -- stateless support routines that are included in each code module
+
+/*
+ *  Portions Copyright (C) 2000-2001 Tim Angus
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*  To assertain which portions are licensed under the GPL and which are
+ *  licensed by Id Software, Inc. please run a diff between the equivalent
+ *  versions of the "Tremulous" modification and the unmodified "Quake3"
+ *  game source code.
+ */
+                    
+#include "q_shared.h"
+
+
+vec3_t  vec3_origin = {0,0,0};
+vec3_t  axisDefault[3] = { { 1, 0, 0 }, { 0, 1, 0 }, { 0, 0, 1 } };
+
+
+vec4_t    colorBlack  = {0, 0, 0, 1};
+vec4_t    colorRed  = {1, 0, 0, 1};
+vec4_t    colorGreen  = {0, 1, 0, 1};
+vec4_t    colorBlue = {0, 0, 1, 1};
+vec4_t    colorYellow = {1, 1, 0, 1};
+vec4_t    colorMagenta= {1, 0, 1, 1};
+vec4_t    colorCyan = {0, 1, 1, 1};
+vec4_t    colorWhite  = {1, 1, 1, 1};
+vec4_t    colorLtGrey = {0.75, 0.75, 0.75, 1};
+vec4_t    colorMdGrey = {0.5, 0.5, 0.5, 1};
+vec4_t    colorDkGrey = {0.25, 0.25, 0.25, 1};
+
+vec4_t  g_color_table[8] =
+  {
+  {0.0, 0.0, 0.0, 1.0},
+  {1.0, 0.0, 0.0, 1.0},
+  {0.0, 1.0, 0.0, 1.0},
+  {1.0, 1.0, 0.0, 1.0},
+  {0.0, 0.0, 1.0, 1.0},
+  {0.0, 1.0, 1.0, 1.0},
+  {1.0, 0.0, 1.0, 1.0},
+  {1.0, 1.0, 1.0, 1.0},
+  };
+
+
+vec3_t  bytedirs[NUMVERTEXNORMALS] =
+{
+{-0.525731f, 0.000000f, 0.850651f}, {-0.442863f, 0.238856f, 0.864188f}, 
+{-0.295242f, 0.000000f, 0.955423f}, {-0.309017f, 0.500000f, 0.809017f}, 
+{-0.162460f, 0.262866f, 0.951056f}, {0.000000f, 0.000000f, 1.000000f}, 
+{0.000000f, 0.850651f, 0.525731f}, {-0.147621f, 0.716567f, 0.681718f}, 
+{0.147621f, 0.716567f, 0.681718f}, {0.000000f, 0.525731f, 0.850651f}, 
+{0.309017f, 0.500000f, 0.809017f}, {0.525731f, 0.000000f, 0.850651f}, 
+{0.295242f, 0.000000f, 0.955423f}, {0.442863f, 0.238856f, 0.864188f}, 
+{0.162460f, 0.262866f, 0.951056f}, {-0.681718f, 0.147621f, 0.716567f}, 
+{-0.809017f, 0.309017f, 0.500000f},{-0.587785f, 0.425325f, 0.688191f}, 
+{-0.850651f, 0.525731f, 0.000000f},{-0.864188f, 0.442863f, 0.238856f}, 
+{-0.716567f, 0.681718f, 0.147621f},{-0.688191f, 0.587785f, 0.425325f}, 
+{-0.500000f, 0.809017f, 0.309017f}, {-0.238856f, 0.864188f, 0.442863f}, 
+{-0.425325f, 0.688191f, 0.587785f}, {-0.716567f, 0.681718f, -0.147621f}, 
+{-0.500000f, 0.809017f, -0.309017f}, {-0.525731f, 0.850651f, 0.000000f}, 
+{0.000000f, 0.850651f, -0.525731f}, {-0.238856f, 0.864188f, -0.442863f}, 
+{0.000000f, 0.955423f, -0.295242f}, {-0.262866f, 0.951056f, -0.162460f}, 
+{0.000000f, 1.000000f, 0.000000f}, {0.000000f, 0.955423f, 0.295242f}, 
+{-0.262866f, 0.951056f, 0.162460f}, {0.238856f, 0.864188f, 0.442863f}, 
+{0.262866f, 0.951056f, 0.162460f}, {0.500000f, 0.809017f, 0.309017f}, 
+{0.238856f, 0.864188f, -0.442863f},{0.262866f, 0.951056f, -0.162460f}, 
+{0.500000f, 0.809017f, -0.309017f},{0.850651f, 0.525731f, 0.000000f}, 
+{0.716567f, 0.681718f, 0.147621f}, {0.716567f, 0.681718f, -0.147621f}, 
+{0.525731f, 0.850651f, 0.000000f}, {0.425325f, 0.688191f, 0.587785f}, 
+{0.864188f, 0.442863f, 0.238856f}, {0.688191f, 0.587785f, 0.425325f}, 
+{0.809017f, 0.309017f, 0.500000f}, {0.681718f, 0.147621f, 0.716567f}, 
+{0.587785f, 0.425325f, 0.688191f}, {0.955423f, 0.295242f, 0.000000f}, 
+{1.000000f, 0.000000f, 0.000000f}, {0.951056f, 0.162460f, 0.262866f}, 
+{0.850651f, -0.525731f, 0.000000f},{0.955423f, -0.295242f, 0.000000f}, 
+{0.864188f, -0.442863f, 0.238856f}, {0.951056f, -0.162460f, 0.262866f}, 
+{0.809017f, -0.309017f, 0.500000f}, {0.681718f, -0.147621f, 0.716567f}, 
+{0.850651f, 0.000000f, 0.525731f}, {0.864188f, 0.442863f, -0.238856f}, 
+{0.809017f, 0.309017f, -0.500000f}, {0.951056f, 0.162460f, -0.262866f}, 
+{0.525731f, 0.000000f, -0.850651f}, {0.681718f, 0.147621f, -0.716567f},
+{0.681718f, -0.147621f, -0.716567f},{0.850651f, 0.000000f, -0.525731f}, 
+{0.809017f, -0.309017f, -0.500000f}, {0.864188f, -0.442863f, -0.238856f}, 
+{0.951056f, -0.162460f, -0.262866f}, {0.147621f, 0.716567f, -0.681718f}, 
+{0.309017f, 0.500000f, -0.809017f}, {0.425325f, 0.688191f, -0.587785f}, 
+{0.442863f, 0.238856f, -0.864188f}, {0.587785f, 0.425325f, -0.688191f}, 
+{0.688191f, 0.587785f, -0.425325f}, {-0.147621f, 0.716567f, -0.681718f}, 
+{-0.309017f, 0.500000f, -0.809017f}, {0.000000f, 0.525731f, -0.850651f}, 
+{-0.525731f, 0.000000f, -0.850651f}, {-0.442863f, 0.238856f, -0.864188f}, 
+{-0.295242f, 0.000000f, -0.955423f}, {-0.162460f, 0.262866f, -0.951056f}, 
+{0.000000f, 0.000000f, -1.000000f}, {0.295242f, 0.000000f, -0.955423f}, 
+{0.162460f, 0.262866f, -0.951056f}, {-0.442863f, -0.238856f, -0.864188f}, 
+{-0.309017f, -0.500000f, -0.809017f}, {-0.162460f, -0.262866f, -0.951056f}, 
+{0.000000f, -0.850651f, -0.525731f}, {-0.147621f, -0.716567f, -0.681718f}, 
+{0.147621f, -0.716567f, -0.681718f}, {0.000000f, -0.525731f, -0.850651f}, 
+{0.309017f, -0.500000f, -0.809017f}, {0.442863f, -0.238856f, -0.864188f}, 
+{0.162460f, -0.262866f, -0.951056f}, {0.238856f, -0.864188f, -0.442863f}, 
+{0.500000f, -0.809017f, -0.309017f}, {0.425325f, -0.688191f, -0.587785f}, 
+{0.716567f, -0.681718f, -0.147621f}, {0.688191f, -0.587785f, -0.425325f}, 
+{0.587785f, -0.425325f, -0.688191f}, {0.000000f, -0.955423f, -0.295242f}, 
+{0.000000f, -1.000000f, 0.000000f}, {0.262866f, -0.951056f, -0.162460f}, 
+{0.000000f, -0.850651f, 0.525731f}, {0.000000f, -0.955423f, 0.295242f}, 
+{0.238856f, -0.864188f, 0.442863f}, {0.262866f, -0.951056f, 0.162460f}, 
+{0.500000f, -0.809017f, 0.309017f}, {0.716567f, -0.681718f, 0.147621f}, 
+{0.525731f, -0.850651f, 0.000000f}, {-0.238856f, -0.864188f, -0.442863f}, 
+{-0.500000f, -0.809017f, -0.309017f}, {-0.262866f, -0.951056f, -0.162460f}, 
+{-0.850651f, -0.525731f, 0.000000f}, {-0.716567f, -0.681718f, -0.147621f}, 
+{-0.716567f, -0.681718f, 0.147621f}, {-0.525731f, -0.850651f, 0.000000f}, 
+{-0.500000f, -0.809017f, 0.309017f}, {-0.238856f, -0.864188f, 0.442863f}, 
+{-0.262866f, -0.951056f, 0.162460f}, {-0.864188f, -0.442863f, 0.238856f}, 
+{-0.809017f, -0.309017f, 0.500000f}, {-0.688191f, -0.587785f, 0.425325f}, 
+{-0.681718f, -0.147621f, 0.716567f}, {-0.442863f, -0.238856f, 0.864188f}, 
+{-0.587785f, -0.425325f, 0.688191f}, {-0.309017f, -0.500000f, 0.809017f}, 
+{-0.147621f, -0.716567f, 0.681718f}, {-0.425325f, -0.688191f, 0.587785f}, 
+{-0.162460f, -0.262866f, 0.951056f}, {0.442863f, -0.238856f, 0.864188f}, 
+{0.162460f, -0.262866f, 0.951056f}, {0.309017f, -0.500000f, 0.809017f}, 
+{0.147621f, -0.716567f, 0.681718f}, {0.000000f, -0.525731f, 0.850651f}, 
+{0.425325f, -0.688191f, 0.587785f}, {0.587785f, -0.425325f, 0.688191f}, 
+{0.688191f, -0.587785f, 0.425325f}, {-0.955423f, 0.295242f, 0.000000f}, 
+{-0.951056f, 0.162460f, 0.262866f}, {-1.000000f, 0.000000f, 0.000000f}, 
+{-0.850651f, 0.000000f, 0.525731f}, {-0.955423f, -0.295242f, 0.000000f}, 
+{-0.951056f, -0.162460f, 0.262866f}, {-0.864188f, 0.442863f, -0.238856f}, 
+{-0.951056f, 0.162460f, -0.262866f}, {-0.809017f, 0.309017f, -0.500000f}, 
+{-0.864188f, -0.442863f, -0.238856f}, {-0.951056f, -0.162460f, -0.262866f}, 
+{-0.809017f, -0.309017f, -0.500000f}, {-0.681718f, 0.147621f, -0.716567f}, 
+{-0.681718f, -0.147621f, -0.716567f}, {-0.850651f, 0.000000f, -0.525731f}, 
+{-0.688191f, 0.587785f, -0.425325f}, {-0.587785f, 0.425325f, -0.688191f}, 
+{-0.425325f, 0.688191f, -0.587785f}, {-0.425325f, -0.688191f, -0.587785f}, 
+{-0.587785f, -0.425325f, -0.688191f}, {-0.688191f, -0.587785f, -0.425325f}
+};
+
+//==============================================================
+
+int   Q_rand( int *seed ) {
+  *seed = (69069 * *seed + 1);
+  return *seed;
+}
+
+float Q_random( int *seed ) {
+  return ( Q_rand( seed ) & 0xffff ) / (float)0x10000;
+}
+
+float Q_crandom( int *seed ) {
+  return 2.0 * ( Q_random( seed ) - 0.5 );
+}
+
+
+//=======================================================
+
+signed char ClampChar( int i ) {
+  if ( i < -128 ) {
+    return -128;
+  }
+  if ( i > 127 ) {
+    return 127;
+  }
+  return i;
+}
+
+signed short ClampShort( int i ) {
+  if ( i < -32768 ) {
+    return -32768;
+  }
+  if ( i > 0x7fff ) {
+    return 0x7fff;
+  }
+  return i;
+}
+
+
+// this isn't a real cheap function to call!
+int DirToByte( vec3_t dir ) {
+  int   i, best;
+  float d, bestd;
+
+  if ( !dir ) {
+    return 0;
+  }
+
+  bestd = 0;
+  best = 0;
+  for (i=0 ; i<NUMVERTEXNORMALS ; i++)
+  {
+    d = DotProduct (dir, bytedirs[i]);
+    if (d > bestd)
+    {
+      bestd = d;
+      best = i;
+    }
+  }
+
+  return best;
+}
+
+void ByteToDir( int b, vec3_t dir ) {
+  if ( b < 0 || b >= NUMVERTEXNORMALS ) {
+    VectorCopy( vec3_origin, dir );
+    return;
+  }
+  VectorCopy (bytedirs[b], dir);
+}
+
+
+unsigned ColorBytes3 (float r, float g, float b) {
+  unsigned  i;
+
+  ( (byte *)&i )[0] = r * 255;
+  ( (byte *)&i )[1] = g * 255;
+  ( (byte *)&i )[2] = b * 255;
+
+  return i;
+}
+
+unsigned ColorBytes4 (float r, float g, float b, float a) {
+  unsigned  i;
+
+  ( (byte *)&i )[0] = r * 255;
+  ( (byte *)&i )[1] = g * 255;
+  ( (byte *)&i )[2] = b * 255;
+  ( (byte *)&i )[3] = a * 255;
+
+  return i;
+}
+
+float NormalizeColor( const vec3_t in, vec3_t out ) {
+  float max;
+
+  max = in[0];
+  if ( in[1] > max ) {
+    max = in[1];
+  }
+  if ( in[2] > max ) {
+    max = in[2];
+  }
+
+  if ( !max ) {
+    VectorClear( out );
+  } else {
+    out[0] = in[0] / max;
+    out[1] = in[1] / max;
+    out[2] = in[2] / max;
+  }
+  return max;
+}
+
+
+/*
+=====================
+PlaneFromPoints
+
+Returns false if the triangle is degenrate.
+The normal will point out of the clock for clockwise ordered points
+=====================
+*/
+qboolean PlaneFromPoints( vec4_t plane, const vec3_t a, const vec3_t b, const vec3_t c ) {
+  vec3_t  d1, d2;
+
+  VectorSubtract( b, a, d1 );
+  VectorSubtract( c, a, d2 );
+  CrossProduct( d2, d1, plane );
+  if ( VectorNormalize( plane ) == 0 ) {
+    return qfalse;
+  }
+
+  plane[3] = DotProduct( a, plane );
+  return qtrue;
+}
+
+
+/// These optimised and much cleaner implementations of the Vector Rotation
+/// functions were provided by Riv of planetquake (riviera@planetquake.com)
+/// ...Cheers Riv...
+/*
+===============
+RotatePointAroundVector
+
+This is not implemented very well...
+===============
+*/
+void RotatePointAroundVector(vec3_t dst, const vec3_t dir, const vec3_t point, float degrees)
+{
+  float sin_a;
+  float cos_a;
+  float cos_ia;
+  float i_i_ia;
+  float j_j_ia;
+  float k_k_ia;
+  float i_j_ia;
+  float i_k_ia;
+  float j_k_ia;
+  float a_sin;
+  float b_sin;
+  float c_sin;
+  float rot[3][3];
+
+  cos_ia = DEG2RAD(degrees);
+  sin_a = sin(cos_ia);
+  cos_a = cos(cos_ia);
+  cos_ia = 1.0F - cos_a;
+
+  i_i_ia = dir[0] * dir[0] * cos_ia;
+  j_j_ia = dir[1] * dir[1] * cos_ia;
+  k_k_ia = dir[2] * dir[2] * cos_ia;
+  i_j_ia = dir[0] * dir[1] * cos_ia;
+  i_k_ia = dir[0] * dir[2] * cos_ia;
+  j_k_ia = dir[1] * dir[2] * cos_ia;
+
+  a_sin = dir[0] * sin_a;
+  b_sin = dir[1] * sin_a;
+  c_sin = dir[2] * sin_a;
+
+  rot[0][0] = i_i_ia + cos_a;
+  rot[0][1] = i_j_ia - c_sin;
+  rot[0][2] = i_k_ia + b_sin;
+  rot[1][0] = i_j_ia + c_sin;
+  rot[1][1] = j_j_ia + cos_a;
+  rot[1][2] = j_k_ia - a_sin;
+
+  rot[2][0] = i_k_ia - b_sin;
+  rot[2][1] = j_k_ia + a_sin;
+  rot[2][2] = k_k_ia + cos_a;
+
+  dst[0] = point[0] * rot[0][0] + point[1] * rot[0][1] + point[2] * rot[0][2];
+  dst[1] = point[0] * rot[1][0] + point[1] * rot[1][1] + point[2] * rot[1][2];
+  dst[2] = point[0] * rot[2][0] + point[1] * rot[2][1] + point[2] * rot[2][2];
+}
+
+
+/*
+===============
+RotateAroundDirection
+===============
+*/
+void RotateAroundDirection(vec3_t axis[3], vec_t angle)
+{
+  vec_t scale;
+
+  angle = DEG2RAD(angle);
+
+  // create an arbitrary axis[1] 
+  PerpendicularVector(axis[1], axis[0]);
+
+  // cross to get axis[2]
+  CrossProduct(axis[0], axis[1], axis[2]);
+
+  // rotate
+  scale = cos(angle);
+  VectorScale(axis[1], scale, axis[1]);
+
+  scale = sin(angle);
+  VectorMA(axis[1], scale, axis[2], axis[1]);
+
+  // recalculate axis[2]
+  CrossProduct(axis[0], axis[1], axis[2]);
+}
+
+
+void vectoangles( const vec3_t value1, vec3_t angles ) {
+  float forward;
+  float yaw, pitch;
+
+  if ( value1[1] == 0 && value1[0] == 0 ) {
+    yaw = 0;
+    if ( value1[2] > 0 ) {
+      pitch = 90;
+    }
+    else {
+      pitch = 270;
+    }
+  }
+  else {
+    if ( value1[0] ) {
+      yaw = ( atan2 ( value1[1], value1[0] ) * 180 / M_PI );
+    }
+    else if ( value1[1] > 0 ) {
+      yaw = 90;
+    }
+    else {
+      yaw = 270;
+    }
+    if ( yaw < 0 ) {
+      yaw += 360;
+    }
+
+    forward = sqrt ( value1[0]*value1[0] + value1[1]*value1[1] );
+    pitch = ( atan2(value1[2], forward) * 180 / M_PI );
+    if ( pitch < 0 ) {
+      pitch += 360;
+    }
+  }
+
+  angles[PITCH] = -pitch;
+  angles[YAW] = yaw;
+  angles[ROLL] = 0;
+}
+
+
+/*
+=================
+AxisToAngles
+TA: takes an axis (forward + right + up)
+    and returns angles -- including a roll
+=================
+*/
+void AxisToAngles( vec3_t axis[3], vec3_t angles ) {
+  float length1;
+  float yaw, pitch, roll;
+
+  if ( axis[0][1] == 0 && axis[0][0] == 0 ) {
+    yaw = 0;
+    if ( axis[0][2] > 0 ) {
+      pitch = 90;
+    }
+    else {
+      pitch = 270;
+    }
+  }
+  else {
+    if ( axis[0][0] ) {
+      yaw = ( atan2 ( axis[0][1], axis[0][0] ) * 180 / M_PI );
+    }
+    else if ( axis[0][1] > 0 ) {
+      yaw = 90;
+    }
+    else {
+      yaw = 270;
+    }
+    if ( yaw < 0 ) {
+      yaw += 360;
+    }
+
+    length1 = sqrt ( axis[0][0]*axis[0][0] + axis[0][1]*axis[0][1] );
+    pitch = ( atan2(axis[0][2], length1) * 180 / M_PI );
+    if ( pitch < 0 ) {
+      pitch += 360;
+    }
+
+    roll = ( atan2( axis[1][2], axis[2][2] ) * 180 / M_PI );
+    if ( roll < 0 ) {
+      roll += 360;
+    }
+  }
+
+  angles[PITCH] = -pitch;
+  angles[YAW] = yaw;
+  angles[ROLL] = roll;
+}
+
+/*
+=================
+AnglesToAxis
+=================
+*/
+void AnglesToAxis( const vec3_t angles, vec3_t axis[3] ) {
+  vec3_t  right;
+
+  // angle vectors returns "right" instead of "y axis"
+  AngleVectors( angles, axis[0], right, axis[2] );
+  VectorSubtract( vec3_origin, right, axis[1] );
+}
+
+void AxisClear( vec3_t axis[3] ) {
+  axis[0][0] = 1;
+  axis[0][1] = 0;
+  axis[0][2] = 0;
+  axis[1][0] = 0;
+  axis[1][1] = 1;
+  axis[1][2] = 0;
+  axis[2][0] = 0;
+  axis[2][1] = 0;
+  axis[2][2] = 1;
+}
+
+void AxisCopy( vec3_t in[3], vec3_t out[3] ) {
+  VectorCopy( in[0], out[0] );
+  VectorCopy( in[1], out[1] );
+  VectorCopy( in[2], out[2] );
+}
+
+void ProjectPointOnPlane( vec3_t dst, const vec3_t p, const vec3_t normal )
+{
+  float d;
+  vec3_t n;
+  float inv_denom;
+
+  inv_denom = 1.0F / DotProduct( normal, normal );
+
+  d = DotProduct( normal, p ) * inv_denom;
+
+  n[0] = normal[0] * inv_denom;
+  n[1] = normal[1] * inv_denom;
+  n[2] = normal[2] * inv_denom;
+
+  dst[0] = p[0] - d * n[0];
+  dst[1] = p[1] - d * n[1];
+  dst[2] = p[2] - d * n[2];
+}
+
+/*
+================
+MakeNormalVectors
+
+Given a normalized forward vector, create two
+other perpendicular vectors
+================
+*/
+void MakeNormalVectors( const vec3_t forward, vec3_t right, vec3_t up) {
+  float   d;
+
+  // this rotate and negate guarantees a vector
+  // not colinear with the original
+  right[1] = -forward[0];
+  right[2] = forward[1];
+  right[0] = forward[2];
+
+  d = DotProduct (right, forward);
+  VectorMA (right, -d, forward, right);
+  VectorNormalize (right);
+  CrossProduct (right, forward, up);
+}
+
+
+void VectorRotate( vec3_t in, vec3_t matrix[3], vec3_t out )
+{
+  out[0] = DotProduct( in, matrix[0] );
+  out[1] = DotProduct( in, matrix[1] );
+  out[2] = DotProduct( in, matrix[2] );
+}
+
+//============================================================================
+
+/*
+** float q_rsqrt( float number )
+*/
+float Q_rsqrt( float number )
+{
+  long i;
+  float x2, y;
+  const float threehalfs = 1.5F;
+
+  x2 = number * 0.5F;
+  y  = number;
+  i  = * ( long * ) &y;           // evil floating point bit level hacking
+  i  = 0x5f3759df - ( i >> 1 );               // what the fuck?
+  y  = * ( float * ) &i;
+  y  = y * ( threehalfs - ( x2 * y * y ) );   // 1st iteration
+//  y  = y * ( threehalfs - ( x2 * y * y ) );   // 2nd iteration, this can be removed
+
+  return y;
+}
+
+float Q_fabs( float f ) {
+  int tmp = * ( int * ) &f;
+  tmp &= 0x7FFFFFFF;
+  return * ( float * ) &tmp;
+}
+
+//============================================================
+
+/*
+===============
+LerpAngle
+
+===============
+*/
+float LerpAngle (float from, float to, float frac) {
+  float a;
+
+  if ( to - from > 180 ) {
+    to -= 360;
+  }
+  if ( to - from < -180 ) {
+    to += 360;
+  }
+  a = from + frac * (to - from);
+
+  return a;
+}
+
+
+/*
+=================
+AngleSubtract
+
+Always returns a value from -180 to 180
+=================
+*/
+float AngleSubtract( float a1, float a2 ) {
+  float a;
+
+  a = a1 - a2;
+  while ( a > 180 ) {
+    a -= 360;
+  }
+  while ( a < -180 ) {
+    a += 360;
+  }
+  return a;
+}
+
+
+void AnglesSubtract( vec3_t v1, vec3_t v2, vec3_t v3 ) {
+  v3[0] = AngleSubtract( v1[0], v2[0] );
+  v3[1] = AngleSubtract( v1[1], v2[1] );
+  v3[2] = AngleSubtract( v1[2], v2[2] );
+}
+
+
+float AngleMod(float a) {
+  a = (360.0/65536) * ((int)(a*(65536/360.0)) & 65535);
+  return a;
+}
+
+
+/*
+=================
+AngleNormalize360
+
+returns angle normalized to the range [0 <= angle < 360]
+=================
+*/
+float AngleNormalize360 ( float angle ) {
+  return (360.0 / 65536) * ((int)(angle * (65536 / 360.0)) & 65535);
+}
+
+
+/*
+=================
+AngleNormalize180
+
+returns angle normalized to the range [-180 < angle <= 180]
+=================
+*/
+float AngleNormalize180 ( float angle ) {
+  angle = AngleNormalize360( angle );
+  if ( angle > 180.0 ) {
+    angle -= 360.0;
+  }
+  return angle;
+}
+
+
+/*
+=================
+AngleDelta
+
+returns the normalized delta from angle1 to angle2
+=================
+*/
+float AngleDelta ( float angle1, float angle2 ) {
+  return AngleNormalize180( angle1 - angle2 );
+}
+
+
+//============================================================
+
+
+/*
+=================
+SetPlaneSignbits
+=================
+*/
+void SetPlaneSignbits (cplane_t *out) {
+  int bits, j;
+
+  // for fast box on planeside test
+  bits = 0;
+  for (j=0 ; j<3 ; j++) {
+    if (out->normal[j] < 0) {
+      bits |= 1<<j;
+    }
+  }
+  out->signbits = bits;
+}
+
+
+/*
+==================
+BoxOnPlaneSide
+
+Returns 1, 2, or 1 + 2
+
+// this is the slow, general version
+int BoxOnPlaneSide2 (vec3_t emins, vec3_t emaxs, struct cplane_s *p)
+{
+  int   i;
+  float dist1, dist2;
+  int   sides;
+  vec3_t  corners[2];
+
+  for (i=0 ; i<3 ; i++)
+  {
+    if (p->normal[i] < 0)
+    {
+      corners[0][i] = emins[i];
+      corners[1][i] = emaxs[i];
+    }
+    else
+    {
+      corners[1][i] = emins[i];
+      corners[0][i] = emaxs[i];
+    }
+  }
+  dist1 = DotProduct (p->normal, corners[0]) - p->dist;
+  dist2 = DotProduct (p->normal, corners[1]) - p->dist;
+  sides = 0;
+  if (dist1 >= 0)
+    sides = 1;
+  if (dist2 < 0)
+    sides |= 2;
+
+  return sides;
+}
+
+==================
+*/
+#if !(defined __linux__ && defined __i386__ && !defined C_ONLY)
+#if defined __LCC__ || defined C_ONLY || !id386
+
+int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, struct cplane_s *p)
+{
+  float dist1, dist2;
+  int   sides;
+
+// fast axial cases
+  if (p->type < 3)
+  {
+    if (p->dist <= emins[p->type])
+      return 1;
+    if (p->dist >= emaxs[p->type])
+      return 2;
+    return 3;
+  }
+
+// general case
+  switch (p->signbits)
+  {
+  case 0:
+    dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
+    dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
+    break;
+  case 1:
+    dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
+    dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
+    break;
+  case 2:
+    dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
+    dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
+    break;
+  case 3:
+    dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
+    dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
+    break;
+  case 4:
+    dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
+    dist2 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
+    break;
+  case 5:
+    dist1 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emins[2];
+    dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emaxs[2];
+    break;
+  case 6:
+    dist1 = p->normal[0]*emaxs[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
+    dist2 = p->normal[0]*emins[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
+    break;
+  case 7:
+    dist1 = p->normal[0]*emins[0] + p->normal[1]*emins[1] + p->normal[2]*emins[2];
+    dist2 = p->normal[0]*emaxs[0] + p->normal[1]*emaxs[1] + p->normal[2]*emaxs[2];
+    break;
+  default:
+    dist1 = dist2 = 0;    // shut up compiler
+    break;
+  }
+
+  sides = 0;
+  if (dist1 >= p->dist)
+    sides = 1;
+  if (dist2 < p->dist)
+    sides |= 2;
+
+  return sides;
+}
+#else
+#pragma warning( disable: 4035 )
+
+__declspec( naked ) int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, struct cplane_s *p)
+{
+  static int bops_initialized;
+  static int Ljmptab[8];
+
+  __asm {
+
+    push ebx
+
+    cmp bops_initialized, 1
+    je  initialized
+    mov bops_initialized, 1
+
+    mov Ljmptab[0*4], offset Lcase0
+    mov Ljmptab[1*4], offset Lcase1
+    mov Ljmptab[2*4], offset Lcase2
+    mov Ljmptab[3*4], offset Lcase3
+    mov Ljmptab[4*4], offset Lcase4
+    mov Ljmptab[5*4], offset Lcase5
+    mov Ljmptab[6*4], offset Lcase6
+    mov Ljmptab[7*4], offset Lcase7
+
+initialized:
+
+    mov edx,dword ptr[4+12+esp]
+    mov ecx,dword ptr[4+4+esp]
+    xor eax,eax
+    mov ebx,dword ptr[4+8+esp]
+    mov al,byte ptr[17+edx]
+    cmp al,8
+    jge Lerror
+    fld dword ptr[0+edx]
+    fld st(0)
+    jmp dword ptr[Ljmptab+eax*4]
+Lcase0:
+    fmul dword ptr[ebx]
+    fld dword ptr[0+4+edx]
+    fxch st(2)
+    fmul dword ptr[ecx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[4+ebx]
+    fld dword ptr[0+8+edx]
+    fxch st(2)
+    fmul dword ptr[4+ecx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[8+ebx]
+    fxch st(5)
+    faddp st(3),st(0)
+    fmul dword ptr[8+ecx]
+    fxch st(1)
+    faddp st(3),st(0)
+    fxch st(3)
+    faddp st(2),st(0)
+    jmp LSetSides
+Lcase1:
+    fmul dword ptr[ecx]
+    fld dword ptr[0+4+edx]
+    fxch st(2)
+    fmul dword ptr[ebx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[4+ebx]
+    fld dword ptr[0+8+edx]
+    fxch st(2)
+    fmul dword ptr[4+ecx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[8+ebx]
+    fxch st(5)
+    faddp st(3),st(0)
+    fmul dword ptr[8+ecx]
+    fxch st(1)
+    faddp st(3),st(0)
+    fxch st(3)
+    faddp st(2),st(0)
+    jmp LSetSides
+Lcase2:
+    fmul dword ptr[ebx]
+    fld dword ptr[0+4+edx]
+    fxch st(2)
+    fmul dword ptr[ecx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[4+ecx]
+    fld dword ptr[0+8+edx]
+    fxch st(2)
+    fmul dword ptr[4+ebx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[8+ebx]
+    fxch st(5)
+    faddp st(3),st(0)
+    fmul dword ptr[8+ecx]
+    fxch st(1)
+    faddp st(3),st(0)
+    fxch st(3)
+    faddp st(2),st(0)
+    jmp LSetSides
+Lcase3:
+    fmul dword ptr[ecx]
+    fld dword ptr[0+4+edx]
+    fxch st(2)
+    fmul dword ptr[ebx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[4+ecx]
+    fld dword ptr[0+8+edx]
+    fxch st(2)
+    fmul dword ptr[4+ebx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[8+ebx]
+    fxch st(5)
+    faddp st(3),st(0)
+    fmul dword ptr[8+ecx]
+    fxch st(1)
+    faddp st(3),st(0)
+    fxch st(3)
+    faddp st(2),st(0)
+    jmp LSetSides
+Lcase4:
+    fmul dword ptr[ebx]
+    fld dword ptr[0+4+edx]
+    fxch st(2)
+    fmul dword ptr[ecx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[4+ebx]
+    fld dword ptr[0+8+edx]
+    fxch st(2)
+    fmul dword ptr[4+ecx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[8+ecx]
+    fxch st(5)
+    faddp st(3),st(0)
+    fmul dword ptr[8+ebx]
+    fxch st(1)
+    faddp st(3),st(0)
+    fxch st(3)
+    faddp st(2),st(0)
+    jmp LSetSides
+Lcase5:
+    fmul dword ptr[ecx]
+    fld dword ptr[0+4+edx]
+    fxch st(2)
+    fmul dword ptr[ebx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[4+ebx]
+    fld dword ptr[0+8+edx]
+    fxch st(2)
+    fmul dword ptr[4+ecx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[8+ecx]
+    fxch st(5)
+    faddp st(3),st(0)
+    fmul dword ptr[8+ebx]
+    fxch st(1)
+    faddp st(3),st(0)
+    fxch st(3)
+    faddp st(2),st(0)
+    jmp LSetSides
+Lcase6:
+    fmul dword ptr[ebx]
+    fld dword ptr[0+4+edx]
+    fxch st(2)
+    fmul dword ptr[ecx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[4+ecx]
+    fld dword ptr[0+8+edx]
+    fxch st(2)
+    fmul dword ptr[4+ebx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[8+ecx]
+    fxch st(5)
+    faddp st(3),st(0)
+    fmul dword ptr[8+ebx]
+    fxch st(1)
+    faddp st(3),st(0)
+    fxch st(3)
+    faddp st(2),st(0)
+    jmp LSetSides
+Lcase7:
+    fmul dword ptr[ecx]
+    fld dword ptr[0+4+edx]
+    fxch st(2)
+    fmul dword ptr[ebx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[4+ecx]
+    fld dword ptr[0+8+edx]
+    fxch st(2)
+    fmul dword ptr[4+ebx]
+    fxch st(2)
+    fld st(0)
+    fmul dword ptr[8+ecx]
+    fxch st(5)
+    faddp st(3),st(0)
+    fmul dword ptr[8+ebx]
+    fxch st(1)
+    faddp st(3),st(0)
+    fxch st(3)
+    faddp st(2),st(0)
+LSetSides:
+    faddp st(2),st(0)
+    fcomp dword ptr[12+edx]
+    xor ecx,ecx
+    fnstsw ax
+    fcomp dword ptr[12+edx]
+    and ah,1
+    xor ah,1
+    add cl,ah
+    fnstsw ax
+    and ah,1
+    add ah,ah
+    add cl,ah
+    pop ebx
+    mov eax,ecx
+    ret
+Lerror:
+    int 3
+  }
+}
+#pragma warning( default: 4035 )
+
+#endif
+#endif
+
+/*
+=================
+RadiusFromBounds
+=================
+*/
+float RadiusFromBounds( const vec3_t mins, const vec3_t maxs ) {
+  int   i;
+  vec3_t  corner;
+  float a, b;
+
+  for (i=0 ; i<3 ; i++) {
+    a = fabs( mins[i] );
+    b = fabs( maxs[i] );
+    corner[i] = a > b ? a : b;
+  }
+
+  return VectorLength (corner);
+}
+
+
+void ClearBounds( vec3_t mins, vec3_t maxs ) {
+  mins[0] = mins[1] = mins[2] = 99999;
+  maxs[0] = maxs[1] = maxs[2] = -99999;
+}
+
+void AddPointToBounds( const vec3_t v, vec3_t mins, vec3_t maxs ) {
+  if ( v[0] < mins[0] ) {
+    mins[0] = v[0];
+  }
+  if ( v[0] > maxs[0]) {
+    maxs[0] = v[0];
+  }
+
+  if ( v[1] < mins[1] ) {
+    mins[1] = v[1];
+  }
+  if ( v[1] > maxs[1]) {
+    maxs[1] = v[1];
+  }
+
+  if ( v[2] < mins[2] ) {
+    mins[2] = v[2];
+  }
+  if ( v[2] > maxs[2]) {
+    maxs[2] = v[2];
+  }
+}
+
+
+int VectorCompare( const vec3_t v1, const vec3_t v2 ) {
+  if (v1[0] != v2[0] || v1[1] != v2[1] || v1[2] != v2[2]) {
+    return 0;
+  }
+
+  return 1;
+}
+
+
+vec_t VectorNormalize( vec3_t v ) {
+  float length, ilength;
+
+  length = v[0]*v[0] + v[1]*v[1] + v[2]*v[2];
+  length = sqrt (length);
+
+  if ( length ) {
+    ilength = 1/length;
+    v[0] *= ilength;
+    v[1] *= ilength;
+    v[2] *= ilength;
+  }
+
+  return length;
+}
+
+//
+// fast vector normalize routine that does not check to make sure
+// that length != 0, nor does it return length
+//
+void VectorNormalizeFast( vec3_t v )
+{
+  float ilength;
+
+  ilength = Q_rsqrt( DotProduct( v, v ) );
+
+  v[0] *= ilength;
+  v[1] *= ilength;
+  v[2] *= ilength;
+}
+
+vec_t VectorNormalize2( const vec3_t v, vec3_t out) {
+  float length, ilength;
+
+  length = v[0]*v[0] + v[1]*v[1] + v[2]*v[2];
+  length = sqrt (length);
+
+  if (length)
+  {
+    ilength = 1/length;
+    out[0] = v[0]*ilength;
+    out[1] = v[1]*ilength;
+    out[2] = v[2]*ilength;
+  } else {
+    VectorClear( out );
+  }
+
+  return length;
+
+}
+
+void _VectorMA( const vec3_t veca, float scale, const vec3_t vecb, vec3_t vecc) {
+  vecc[0] = veca[0] + scale*vecb[0];
+  vecc[1] = veca[1] + scale*vecb[1];
+  vecc[2] = veca[2] + scale*vecb[2];
+}
+
+
+vec_t _DotProduct( const vec3_t v1, const vec3_t v2 ) {
+  return v1[0]*v2[0] + v1[1]*v2[1] + v1[2]*v2[2];
+}
+
+void _VectorSubtract( const vec3_t veca, const vec3_t vecb, vec3_t out ) {
+  out[0] = veca[0]-vecb[0];
+  out[1] = veca[1]-vecb[1];
+  out[2] = veca[2]-vecb[2];
+}
+
+void _VectorAdd( const vec3_t veca, const vec3_t vecb, vec3_t out ) {
+  out[0] = veca[0]+vecb[0];
+  out[1] = veca[1]+vecb[1];
+  out[2] = veca[2]+vecb[2];
+}
+
+void _VectorCopy( const vec3_t in, vec3_t out ) {
+  out[0] = in[0];
+  out[1] = in[1];
+  out[2] = in[2];
+}
+
+void _VectorScale( const vec3_t in, vec_t scale, vec3_t out ) {
+  out[0] = in[0]*scale;
+  out[1] = in[1]*scale;
+  out[2] = in[2]*scale;
+}
+
+void CrossProduct( const vec3_t v1, const vec3_t v2, vec3_t cross ) {
+  cross[0] = v1[1]*v2[2] - v1[2]*v2[1];
+  cross[1] = v1[2]*v2[0] - v1[0]*v2[2];
+  cross[2] = v1[0]*v2[1] - v1[1]*v2[0];
+}
+
+vec_t VectorLength( const vec3_t v ) {
+  return sqrt (v[0]*v[0] + v[1]*v[1] + v[2]*v[2]);
+}
+
+
+vec_t VectorLengthSquared( const vec3_t v ) {
+    return (v[0]*v[0] + v[1]*v[1] + v[2]*v[2]);
+}
+
+
+vec_t Distance( const vec3_t p1, const vec3_t p2 ) {
+  vec3_t  v;
+
+  VectorSubtract (p2, p1, v);
+  return VectorLength( v );
+}
+
+vec_t DistanceSquared( const vec3_t p1, const vec3_t p2 ) {
+  vec3_t  v;
+
+  VectorSubtract (p2, p1, v);
+  return v[0]*v[0] + v[1]*v[1] + v[2]*v[2];
+}
+
+
+void VectorInverse( vec3_t v ){
+  v[0] = -v[0];
+  v[1] = -v[1];
+  v[2] = -v[2];
+}
+
+void Vector4Scale( const vec4_t in, vec_t scale, vec4_t out ) {
+  out[0] = in[0]*scale;
+  out[1] = in[1]*scale;
+  out[2] = in[2]*scale;
+  out[3] = in[3]*scale;
+}
+
+
+int Q_log2( int val ) {
+  int answer;
+
+  answer = 0;
+  while ( ( val>>=1 ) != 0 ) {
+    answer++;
+  }
+  return answer;
+}
+
+
+
+/*
+=================
+PlaneTypeForNormal
+=================
+*/
+/*
+int PlaneTypeForNormal (vec3_t normal) {
+  if ( normal[0] == 1.0 )
+    return PLANE_X;
+  if ( normal[1] == 1.0 )
+    return PLANE_Y;
+  if ( normal[2] == 1.0 )
+    return PLANE_Z;
+
+  return PLANE_NON_AXIAL;
+}
+*/
+
+
+/*
+================
+MatrixMultiply
+================
+*/
+void MatrixMultiply(float in1[3][3], float in2[3][3], float out[3][3]) {
+  out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] +
+        in1[0][2] * in2[2][0];
+  out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] +
+        in1[0][2] * in2[2][1];
+  out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] +
+        in1[0][2] * in2[2][2];
+  out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] +
+        in1[1][2] * in2[2][0];
+  out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] +
+        in1[1][2] * in2[2][1];
+  out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] +
+        in1[1][2] * in2[2][2];
+  out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] +
+        in1[2][2] * in2[2][0];
+  out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] +
+        in1[2][2] * in2[2][1];
+  out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] +
+        in1[2][2] * in2[2][2];
+}
+
+
+void AngleVectors( const vec3_t angles, vec3_t forward, vec3_t right, vec3_t up) {
+  float   angle;
+  static float    sr, sp, sy, cr, cp, cy;
+  // static to help MS compiler fp bugs
+
+  angle = angles[YAW] * (M_PI*2 / 360);
+  sy = sin(angle);
+  cy = cos(angle);
+  angle = angles[PITCH] * (M_PI*2 / 360);
+  sp = sin(angle);
+  cp = cos(angle);
+  angle = angles[ROLL] * (M_PI*2 / 360);
+  sr = sin(angle);
+  cr = cos(angle);
+
+  if (forward)
+  {
+    forward[0] = cp*cy;
+    forward[1] = cp*sy;
+    forward[2] = -sp;
+  }
+  if (right)
+  {
+    right[0] = (-1*sr*sp*cy+-1*cr*-sy);
+    right[1] = (-1*sr*sp*sy+-1*cr*cy);
+    right[2] = -1*sr*cp;
+  }
+  if (up)
+  {
+    up[0] = (cr*sp*cy+-sr*-sy);
+    up[1] = (cr*sp*sy+-sr*cy);
+    up[2] = cr*cp;
+  }
+}
+
+/*
+** assumes "src" is normalized
+*/
+void PerpendicularVector( vec3_t dst, const vec3_t src )
+{
+  int pos;
+  int i;
+  float minelem = 1.0F;
+  vec3_t tempvec;
+
+  /*
+  ** find the smallest magnitude axially aligned vector
+  */
+  for ( pos = 0, i = 0; i < 3; i++ )
+  {
+    if ( fabs( src[i] ) < minelem )
+    {
+      pos = i;
+      minelem = fabs( src[i] );
+    }
+  }
+  tempvec[0] = tempvec[1] = tempvec[2] = 0.0F;
+  tempvec[pos] = 1.0F;
+
+  /*
+  ** project the point onto the plane defined by src
+  */
+  ProjectPointOnPlane( dst, tempvec, src );
+
+  /*
+  ** normalize the result
+  */
+  VectorNormalize( dst );
+}
+
+float arccos( float x )
+{
+  return atan2( sqrt( 1.0 - x * x ) / x, x );
+}
+
diff --git a/src/game/q_shared.c b/src/game/q_shared.c
new file mode 100644
index 00000000..3477de84
--- /dev/null
+++ b/src/game/q_shared.c
@@ -0,0 +1,1229 @@
+// Copyright (C) 1999-2000 Id Software, Inc.
+//
+// q_shared.c -- stateless support routines that are included in each code dll
+
+/*
+ *  Portions Copyright (C) 2000-2001 Tim Angus
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*  To assertain which portions are licensed under the GPL and which are
+ *  licensed by Id Software, Inc. please run a diff between the equivalent
+ *  versions of the "Tremulous" modification and the unmodified "Quake3"
+ *  game source code.
+ */
+                    
+#include "q_shared.h"
+
+float Com_Clamp( float min, float max, float value ) {
+  if ( value < min ) {
+    return min;
+  }
+  if ( value > max ) {
+    return max;
+  }
+  return value;
+}
+
+
+/*
+============
+COM_SkipPath
+============
+*/
+char *COM_SkipPath (char *pathname)
+{
+  char  *last;
+
+  last = pathname;
+  while (*pathname)
+  {
+    if (*pathname=='/')
+      last = pathname+1;
+    pathname++;
+  }
+  return last;
+}
+
+/*
+============
+COM_StripExtension
+============
+*/
+void COM_StripExtension( const char *in, char *out ) {
+  while ( *in && *in != '.' ) {
+    *out++ = *in++;
+  }
+  *out = 0;
+}
+
+
+/*
+==================
+COM_DefaultExtension
+==================
+*/
+void COM_DefaultExtension (char *path, int maxSize, const char *extension ) {
+  char  oldPath[MAX_QPATH];
+  char    *src;
+
+//
+// if path doesn't have a .EXT, append extension
+// (extension should include the .)
+//
+  src = path + strlen(path) - 1;
+
+  while (*src != '/' && src != path) {
+    if ( *src == '.' ) {
+      return;                 // it has an extension
+    }
+    src--;
+  }
+
+  Q_strncpyz( oldPath, path, sizeof( oldPath ) );
+  Com_sprintf( path, maxSize, "%s%s", oldPath, extension );
+}
+
+/*
+============================================================================
+
+          BYTE ORDER FUNCTIONS
+
+============================================================================
+*/
+
+// can't just use function pointers, or dll linkage can
+// mess up when qcommon is included in multiple places
+static short  (*_BigShort) (short l);
+static short  (*_LittleShort) (short l);
+static int    (*_BigLong) (int l);
+static int    (*_LittleLong) (int l);
+static qint64 (*_BigLong64) (qint64 l);
+static qint64 (*_LittleLong64) (qint64 l);
+static float  (*_BigFloat) (float l);
+static float  (*_LittleFloat) (float l);
+
+short BigShort(short l){return _BigShort(l);}
+short LittleShort(short l) {return _LittleShort(l);}
+int   BigLong (int l) {return _BigLong(l);}
+int   LittleLong (int l) {return _LittleLong(l);}
+qint64  BigLong64 (qint64 l) {return _BigLong64(l);}
+qint64  LittleLong64 (qint64 l) {return _LittleLong64(l);}
+float BigFloat (float l) {return _BigFloat(l);}
+float LittleFloat (float l) {return _LittleFloat(l);}
+
+short   ShortSwap (short l)
+{
+  byte    b1,b2;
+
+  b1 = l&255;
+  b2 = (l>>8)&255;
+
+  return (b1<<8) + b2;
+}
+
+short ShortNoSwap (short l)
+{
+  return l;
+}
+
+int    LongSwap (int l)
+{
+  byte    b1,b2,b3,b4;
+
+  b1 = l&255;
+  b2 = (l>>8)&255;
+  b3 = (l>>16)&255;
+  b4 = (l>>24)&255;
+
+  return ((int)b1<<24) + ((int)b2<<16) + ((int)b3<<8) + b4;
+}
+
+int LongNoSwap (int l)
+{
+  return l;
+}
+
+qint64 Long64Swap (qint64 ll)
+{
+  qint64  result;
+
+  result.b0 = ll.b7;
+  result.b1 = ll.b6;
+  result.b2 = ll.b5;
+  result.b3 = ll.b4;
+  result.b4 = ll.b3;
+  result.b5 = ll.b2;
+  result.b6 = ll.b1;
+  result.b7 = ll.b0;
+
+  return result;
+}
+
+qint64 Long64NoSwap (qint64 ll)
+{
+  return ll;
+}
+
+
+float FloatSwap (float f)
+{
+  union
+  {
+    float f;
+    byte  b[4];
+  } dat1, dat2;
+
+
+  dat1.f = f;
+  dat2.b[0] = dat1.b[3];
+  dat2.b[1] = dat1.b[2];
+  dat2.b[2] = dat1.b[1];
+  dat2.b[3] = dat1.b[0];
+  return dat2.f;
+}
+
+float FloatNoSwap (float f)
+{
+  return f;
+}
+
+/*
+================
+Swap_Init
+================
+*/
+void Swap_Init (void)
+{
+  byte  swaptest[2] = {1,0};
+
+// set the byte swapping variables in a portable manner
+  if ( *(short *)swaptest == 1)
+  {
+    _BigShort = ShortSwap;
+    _LittleShort = ShortNoSwap;
+    _BigLong = LongSwap;
+    _LittleLong = LongNoSwap;
+    _BigLong64 = Long64Swap;
+    _LittleLong64 = Long64NoSwap;
+    _BigFloat = FloatSwap;
+    _LittleFloat = FloatNoSwap;
+  }
+  else
+  {
+    _BigShort = ShortNoSwap;
+    _LittleShort = ShortSwap;
+    _BigLong = LongNoSwap;
+    _LittleLong = LongSwap;
+    _BigLong64 = Long64NoSwap;
+    _LittleLong64 = Long64Swap;
+    _BigFloat = FloatNoSwap;
+    _LittleFloat = FloatSwap;
+  }
+
+}
+
+
+/*
+============================================================================
+
+PARSING
+
+============================================================================
+*/
+
+static  char  com_token[MAX_TOKEN_CHARS];
+static  char  com_parsename[MAX_TOKEN_CHARS];
+static  int   com_lines;
+
+void COM_BeginParseSession( const char *name )
+{
+  com_lines = 0;
+  Com_sprintf(com_parsename, sizeof(com_parsename), "%s", name);
+}
+
+int COM_GetCurrentParseLine( void )
+{
+  return com_lines;
+}
+
+char *COM_Parse( char **data_p )
+{
+  return COM_ParseExt( data_p, qtrue );
+}
+
+
+void COM_ParseError( char *format, ... )
+{
+  va_list argptr;
+  static char string[4096];
+
+  va_start (argptr, format);
+  vsprintf (string, format, argptr);
+  va_end (argptr);
+
+  Com_Printf("ERROR: %s, line %d: %s\n", com_parsename, com_lines, string);
+}
+
+void COM_ParseWarning( char *format, ... )
+{
+  va_list argptr;
+  static char string[4096];
+
+  va_start (argptr, format);
+  vsprintf (string, format, argptr);
+  va_end (argptr);
+
+  Com_Printf("WARNING: %s, line %d: %s\n", com_parsename, com_lines, string);
+}
+
+
+/*
+==============
+COM_Parse
+
+Parse a token out of a string
+Will never return NULL, just empty strings
+
+If "allowLineBreaks" is qtrue then an empty
+string will be returned if the next token is
+a newline.
+==============
+*/
+static char *SkipWhitespace( char *data, qboolean *hasNewLines ) {
+  int c;
+
+  while( (c = *data) <= ' ') {
+    if( !c ) {
+      return NULL;
+    }
+    if( c == '\n' ) {
+      com_lines++;
+      *hasNewLines = qtrue;
+    }
+    data++;
+  }
+
+  return data;
+}
+
+
+int COM_Compress( char *data_p ) {
+  char *datai, *datao;
+  int c, pc, size;
+  qboolean ws = qfalse;
+
+  size = 0;
+  pc = 0;
+  datai = datao = data_p;
+  if (datai) {
+    while ((c = *datai) != 0) {
+      if (c == 13 || c == 10) {
+        *datao = c;
+        datao++;
+        ws = qfalse;
+        pc = c;
+        datai++;
+        size++;
+      // skip double slash comments
+      } else if ( c == '/' && datai[1] == '/' ) {
+        while (*datai && *datai != '\n') {
+          datai++;
+        }
+        ws = qfalse;
+      // skip /* */ comments
+      } else if ( c=='/' && datai[1] == '*' ) {
+        while ( *datai && ( *datai != '*' || datai[1] != '/' ) ) 
+        {
+          datai++;
+        }
+        if ( *datai ) 
+        {
+          datai += 2;
+        }
+        ws = qfalse;
+      } else {
+        if (ws) {
+          *datao = ' ';
+          datao++;
+        }
+        *datao = c;
+        datao++;
+        datai++;
+        ws = qfalse;
+        pc = c;
+        size++;
+      }
+    }
+  }
+  *datao = 0;
+  return size;
+}
+
+
+char *COM_ParseExt( char **data_p, qboolean allowLineBreaks )
+{
+  int c = 0, len;
+  qboolean hasNewLines = qfalse;
+  char *data;
+
+  data = *data_p;
+  len = 0;
+  com_token[0] = 0;
+
+  // make sure incoming data is valid
+  if ( !data )
+  {
+    *data_p = NULL;
+    return com_token;
+  }
+
+  while ( 1 )
+  {
+    // skip whitespace
+    data = SkipWhitespace( data, &hasNewLines );
+    if ( !data )
+    {
+      *data_p = NULL;
+      return com_token;
+    }
+    if ( hasNewLines && !allowLineBreaks )
+    {
+      *data_p = data;
+      return com_token;
+    }
+
+    c = *data;
+
+    // skip double slash comments
+    if ( c == '/' && data[1] == '/' )
+    {
+      data += 2;
+      while (*data && *data != '\n') {
+        data++;
+      }
+    }
+    // skip /* */ comments
+    else if ( c=='/' && data[1] == '*' )
+    {
+      data += 2;
+      while ( *data && ( *data != '*' || data[1] != '/' ) )
+      {
+        data++;
+      }
+      if ( *data )
+      {
+        data += 2;
+      }
+    }
+    else
+    {
+      break;
+    }
+  }
+
+  // handle quoted strings
+  if (c == '\"')
+  {
+    data++;
+    while (1)
+    {
+      c = *data++;
+      if (c=='\"' || !c)
+      {
+        com_token[len] = 0;
+        *data_p = ( char * ) data;
+        return com_token;
+      }
+      if (len < MAX_TOKEN_CHARS)
+      {
+        com_token[len] = c;
+        len++;
+      }
+    }
+  }
+
+  // parse a regular word
+  do
+  {
+    if (len < MAX_TOKEN_CHARS)
+    {
+      com_token[len] = c;
+      len++;
+    }
+    data++;
+    c = *data;
+    if ( c == '\n' )
+      com_lines++;
+  } while (c>32);
+
+  if (len == MAX_TOKEN_CHARS)
+  {
+//    Com_Printf ("Token exceeded %i chars, discarded.\n", MAX_TOKEN_CHARS);
+    len = 0;
+  }
+  com_token[len] = 0;
+
+  *data_p = ( char * ) data;
+  return com_token;
+}
+
+
+#if 0
+// no longer used
+/*
+===============
+COM_ParseInfos
+===============
+*/
+int COM_ParseInfos( char *buf, int max, char infos[][MAX_INFO_STRING] ) {
+  char  *token;
+  int   count;
+  char  key[MAX_TOKEN_CHARS];
+
+  count = 0;
+
+  while ( 1 ) {
+    token = COM_Parse( &buf );
+    if ( !token[0] ) {
+      break;
+    }
+    if ( strcmp( token, "{" ) ) {
+      Com_Printf( "Missing { in info file\n" );
+      break;
+    }
+
+    if ( count == max ) {
+      Com_Printf( "Max infos exceeded\n" );
+      break;
+    }
+
+    infos[count][0] = 0;
+    while ( 1 ) {
+      token = COM_ParseExt( &buf, qtrue );
+      if ( !token[0] ) {
+        Com_Printf( "Unexpected end of info file\n" );
+        break;
+      }
+      if ( !strcmp( token, "}" ) ) {
+        break;
+      }
+      Q_strncpyz( key, token, sizeof( key ) );
+
+      token = COM_ParseExt( &buf, qfalse );
+      if ( !token[0] ) {
+        strcpy( token, "<NULL>" );
+      }
+      Info_SetValueForKey( infos[count], key, token );
+    }
+    count++;
+  }
+
+  return count;
+}
+#endif
+
+
+/*
+==================
+COM_MatchToken
+==================
+*/
+void COM_MatchToken( char **buf_p, char *match ) {
+  char  *token;
+
+  token = COM_Parse( buf_p );
+  if ( strcmp( token, match ) ) {
+    Com_Error( ERR_DROP, "MatchToken: %s != %s", token, match );
+  }
+}
+
+
+/*
+=================
+SkipBracedSection
+
+The next token should be an open brace.
+Skips until a matching close brace is found.
+Internal brace depths are properly skipped.
+=================
+*/
+void SkipBracedSection (char **program) {
+  char      *token;
+  int       depth;
+
+  depth = 0;
+  do {
+    token = COM_ParseExt( program, qtrue );
+    if( token[1] == 0 ) {
+      if( token[0] == '{' ) {
+        depth++;
+      }
+      else if( token[0] == '}' ) {
+        depth--;
+      }
+    }
+  } while( depth && *program );
+}
+
+/*
+=================
+SkipRestOfLine
+=================
+*/
+void SkipRestOfLine ( char **data ) {
+  char  *p;
+  int   c;
+
+  p = *data;
+  while ( (c = *p++) != 0 ) {
+    if ( c == '\n' ) {
+      com_lines++;
+      break;
+    }
+  }
+
+  *data = p;
+}
+
+
+void Parse1DMatrix (char **buf_p, int x, float *m) {
+  char  *token;
+  int   i;
+
+  COM_MatchToken( buf_p, "(" );
+
+  for (i = 0 ; i < x ; i++) {
+    token = COM_Parse(buf_p);
+    m[i] = atof(token);
+  }
+
+  COM_MatchToken( buf_p, ")" );
+}
+
+void Parse2DMatrix (char **buf_p, int y, int x, float *m) {
+  int   i;
+
+  COM_MatchToken( buf_p, "(" );
+
+  for (i = 0 ; i < y ; i++) {
+    Parse1DMatrix (buf_p, x, m + i * x);
+  }
+
+  COM_MatchToken( buf_p, ")" );
+}
+
+void Parse3DMatrix (char **buf_p, int z, int y, int x, float *m) {
+  int   i;
+
+  COM_MatchToken( buf_p, "(" );
+
+  for (i = 0 ; i < z ; i++) {
+    Parse2DMatrix (buf_p, y, x, m + i * x*y);
+  }
+
+  COM_MatchToken( buf_p, ")" );
+}
+
+
+/*
+============================================================================
+
+          LIBRARY REPLACEMENT FUNCTIONS
+
+============================================================================
+*/
+
+int Q_isprint( int c )
+{
+  if ( c >= 0x20 && c <= 0x7E )
+    return ( 1 );
+  return ( 0 );
+}
+
+int Q_islower( int c )
+{
+  if (c >= 'a' && c <= 'z')
+    return ( 1 );
+  return ( 0 );
+}
+
+int Q_isupper( int c )
+{
+  if (c >= 'A' && c <= 'Z')
+    return ( 1 );
+  return ( 0 );
+}
+
+int Q_isalpha( int c )
+{
+  if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
+    return ( 1 );
+  return ( 0 );
+}
+
+char* Q_strrchr( const char* string, int c )
+{
+  char cc = c;
+  char *s;
+  char *sp=(char *)0;
+
+  s = (char*)string;
+
+  while (*s)
+  {
+    if (*s == cc)
+      sp = s;
+    s++;
+  }
+  if (cc == 0)
+    sp = s;
+
+  return sp;
+}
+
+/*
+=============
+Q_strncpyz
+
+Safe strncpy that ensures a trailing zero
+=============
+*/
+void Q_strncpyz( char *dest, const char *src, int destsize ) {
+  if ( !src ) {
+    Com_Error( ERR_FATAL, "Q_strncpyz: NULL src" );
+  }
+  if ( destsize < 1 ) {
+    Com_Error(ERR_FATAL,"Q_strncpyz: destsize < 1" );
+  }
+
+  strncpy( dest, src, destsize-1 );
+    dest[destsize-1] = 0;
+}
+
+int Q_stricmpn (const char *s1, const char *s2, int n) {
+  int   c1, c2;
+
+  do {
+    c1 = *s1++;
+    c2 = *s2++;
+
+    if (!n--) {
+      return 0;   // strings are equal until end point
+    }
+
+    if (c1 != c2) {
+      if (c1 >= 'a' && c1 <= 'z') {
+        c1 -= ('a' - 'A');
+      }
+      if (c2 >= 'a' && c2 <= 'z') {
+        c2 -= ('a' - 'A');
+      }
+      if (c1 != c2) {
+        return c1 < c2 ? -1 : 1;
+      }
+    }
+  } while (c1);
+
+  return 0;   // strings are equal
+}
+
+int Q_strncmp (const char *s1, const char *s2, int n) {
+  int   c1, c2;
+
+  do {
+    c1 = *s1++;
+    c2 = *s2++;
+
+    if (!n--) {
+      return 0;   // strings are equal until end point
+    }
+
+    if (c1 != c2) {
+      return c1 < c2 ? -1 : 1;
+    }
+  } while (c1);
+
+  return 0;   // strings are equal
+}
+
+int Q_stricmp (const char *s1, const char *s2) {
+  return (s1 && s2) ? Q_stricmpn (s1, s2, 99999) : -1;
+}
+
+
+char *Q_strlwr( char *s1 ) {
+    char  *s;
+
+    s = s1;
+  while ( *s ) {
+    *s = tolower(*s);
+    s++;
+  }
+    return s1;
+}
+
+char *Q_strupr( char *s1 ) {
+    char  *s;
+
+    s = s1;
+  while ( *s ) {
+    *s = toupper(*s);
+    s++;
+  }
+    return s1;
+}
+
+
+// never goes past bounds or leaves without a terminating 0
+void Q_strcat( char *dest, int size, const char *src ) {
+  int   l1;
+
+  l1 = strlen( dest );
+  if ( l1 >= size ) {
+    Com_Error( ERR_FATAL, "Q_strcat: already overflowed" );
+  }
+  Q_strncpyz( dest + l1, src, size - l1 );
+}
+
+
+int Q_PrintStrlen( const char *string ) {
+  int     len;
+  const char  *p;
+
+  if( !string ) {
+    return 0;
+  }
+
+  len = 0;
+  p = string;
+  while( *p ) {
+    if( Q_IsColorString( p ) ) {
+      p += 2;
+      continue;
+    }
+    p++;
+    len++;
+  }
+
+  return len;
+}
+
+
+char *Q_CleanStr( char *string ) {
+  char* d;
+  char* s;
+  int   c;
+
+  s = string;
+  d = string;
+  while ((c = *s) != 0 ) {
+    if ( Q_IsColorString( s ) ) {
+      s++;
+    }
+    else if ( c >= 0x20 && c <= 0x7E ) {
+      *d++ = c;
+    }
+    s++;
+  }
+  *d = '\0';
+
+  return string;
+}
+
+
+void QDECL Com_sprintf( char *dest, int size, const char *fmt, ...) {
+  int   len;
+  va_list   argptr;
+  char  bigbuffer[32000]; // big, but small enough to fit in PPC stack
+
+  va_start (argptr,fmt);
+  len = vsprintf (bigbuffer,fmt,argptr);
+  va_end (argptr);
+  if ( len >= sizeof( bigbuffer ) ) {
+    Com_Error( ERR_FATAL, "Com_sprintf: overflowed bigbuffer" );
+  }
+  if (len >= size) {
+    Com_Printf ("Com_sprintf: overflow of %i in %i\n", len, size);
+  }
+  Q_strncpyz (dest, bigbuffer, size );
+}
+
+
+/*
+============
+va
+
+does a varargs printf into a temp buffer, so I don't need to have
+varargs versions of all text functions.
+FIXME: make this buffer size safe someday
+============
+*/
+char  * QDECL va( char *format, ... ) {
+  va_list   argptr;
+  static char   string[2][32000]; // in case va is called by nested functions
+  static int    index = 0;
+  char  *buf;
+
+  buf = string[index & 1];
+  index++;
+
+  va_start (argptr, format);
+  vsprintf (buf, format,argptr);
+  va_end (argptr);
+
+  return buf;
+}
+
+
+/*
+=====================================================================
+
+  INFO STRINGS
+
+=====================================================================
+*/
+
+/*
+===============
+Info_ValueForKey
+
+Searches the string for the given
+key and returns the associated value, or an empty string.
+FIXME: overflow check?
+===============
+*/
+char *Info_ValueForKey( const char *s, const char *key ) {
+  char  pkey[BIG_INFO_KEY];
+  static  char value[2][BIG_INFO_VALUE];  // use two buffers so compares
+                      // work without stomping on each other
+  static  int valueindex = 0;
+  char  *o;
+
+  if ( !s || !key ) {
+    return "";
+  }
+
+  if ( strlen( s ) >= BIG_INFO_STRING ) {
+    Com_Error( ERR_DROP, "Info_ValueForKey: oversize infostring" );
+  }
+
+  valueindex ^= 1;
+  if (*s == '\\')
+    s++;
+  while (1)
+  {
+    o = pkey;
+    while (*s != '\\')
+    {
+      if (!*s)
+        return "";
+      *o++ = *s++;
+    }
+    *o = 0;
+    s++;
+
+    o = value[valueindex];
+
+    while (*s != '\\' && *s)
+    {
+      *o++ = *s++;
+    }
+    *o = 0;
+
+    if (!Q_stricmp (key, pkey) )
+      return value[valueindex];
+
+    if (!*s)
+      break;
+    s++;
+  }
+
+  return "";
+}
+
+
+/*
+===================
+Info_NextPair
+
+Used to itterate through all the key/value pairs in an info string
+===================
+*/
+void Info_NextPair( const char **head, char *key, char *value ) {
+  char  *o;
+  const char  *s;
+
+  s = *head;
+
+  if ( *s == '\\' ) {
+    s++;
+  }
+  key[0] = 0;
+  value[0] = 0;
+
+  o = key;
+  while ( *s != '\\' ) {
+    if ( !*s ) {
+      *o = 0;
+      *head = s;
+      return;
+    }
+    *o++ = *s++;
+  }
+  *o = 0;
+  s++;
+
+  o = value;
+  while ( *s != '\\' && *s ) {
+    *o++ = *s++;
+  }
+  *o = 0;
+
+  *head = s;
+}
+
+
+/*
+===================
+Info_RemoveKey
+===================
+*/
+void Info_RemoveKey( char *s, const char *key ) {
+  char  *start;
+  char  pkey[MAX_INFO_KEY];
+  char  value[MAX_INFO_VALUE];
+  char  *o;
+
+  if ( strlen( s ) >= MAX_INFO_STRING ) {
+    Com_Error( ERR_DROP, "Info_RemoveKey: oversize infostring" );
+  }
+
+  if (strchr (key, '\\')) {
+    return;
+  }
+
+  while (1)
+  {
+    start = s;
+    if (*s == '\\')
+      s++;
+    o = pkey;
+    while (*s != '\\')
+    {
+      if (!*s)
+        return;
+      *o++ = *s++;
+    }
+    *o = 0;
+    s++;
+
+    o = value;
+    while (*s != '\\' && *s)
+    {
+      if (!*s)
+        return;
+      *o++ = *s++;
+    }
+    *o = 0;
+
+    if (!strcmp (key, pkey) )
+    {
+      strcpy (start, s);  // remove this part
+      return;
+    }
+
+    if (!*s)
+      return;
+  }
+
+}
+
+
+/*
+===================
+Info_RemoveKey_Big
+===================
+*/
+void Info_RemoveKey_Big( char *s, const char *key ) {
+  char  *start;
+  char  pkey[BIG_INFO_KEY];
+  char  value[BIG_INFO_VALUE];
+  char  *o;
+
+  if ( strlen( s ) >= BIG_INFO_STRING ) {
+    Com_Error( ERR_DROP, "Info_RemoveKey_Big: oversize infostring" );
+  }
+
+  if (strchr (key, '\\')) {
+    return;
+  }
+
+  while (1)
+  {
+    start = s;
+    if (*s == '\\')
+      s++;
+    o = pkey;
+    while (*s != '\\')
+    {
+      if (!*s)
+        return;
+      *o++ = *s++;
+    }
+    *o = 0;
+    s++;
+
+    o = value;
+    while (*s != '\\' && *s)
+    {
+      if (!*s)
+        return;
+      *o++ = *s++;
+    }
+    *o = 0;
+
+    if (!strcmp (key, pkey) )
+    {
+      strcpy (start, s);  // remove this part
+      return;
+    }
+
+    if (!*s)
+      return;
+  }
+
+}
+
+
+/*
+==================
+Info_Validate
+
+Some characters are illegal in info strings because they
+can mess up the server's parsing
+==================
+*/
+qboolean Info_Validate( const char *s ) {
+  if ( strchr( s, '\"' ) ) {
+    return qfalse;
+  }
+  if ( strchr( s, ';' ) ) {
+    return qfalse;
+  }
+  return qtrue;
+}
+
+/*
+==================
+Info_SetValueForKey
+
+Changes or adds a key/value pair
+==================
+*/
+void Info_SetValueForKey( char *s, const char *key, const char *value ) {
+  char  newi[MAX_INFO_STRING];
+
+  if ( strlen( s ) >= MAX_INFO_STRING ) {
+    Com_Error( ERR_DROP, "Info_SetValueForKey: oversize infostring" );
+  }
+
+  if (strchr (key, '\\') || strchr (value, '\\'))
+  {
+    Com_Printf ("Can't use keys or values with a \\\n");
+    return;
+  }
+
+  if (strchr (key, ';') || strchr (value, ';'))
+  {
+    Com_Printf ("Can't use keys or values with a semicolon\n");
+    return;
+  }
+
+  if (strchr (key, '\"') || strchr (value, '\"'))
+  {
+    Com_Printf ("Can't use keys or values with a \"\n");
+    return;
+  }
+
+  Info_RemoveKey (s, key);
+  if (!value || !strlen(value))
+    return;
+
+  Com_sprintf (newi, sizeof(newi), "\\%s\\%s", key, value);
+
+  if (strlen(newi) + strlen(s) > MAX_INFO_STRING)
+  {
+    Com_Printf ("Info string length exceeded\n");
+    return;
+  }
+
+  strcat (s, newi);
+}
+
+//====================================================================
+
+
+/*
+==================
+Info_SetValueForKey_Big
+
+Changes or adds a key/value pair
+==================
+*/
+void Info_SetValueForKey_Big( char *s, const char *key, const char *value ) {
+  char  newi[BIG_INFO_STRING];
+
+  if ( strlen( s ) >= BIG_INFO_STRING ) {
+    Com_Error( ERR_DROP, "Info_SetValueForKey: oversize infostring" );
+  }
+
+  if (strchr (key, '\\') || strchr (value, '\\'))
+  {
+    Com_Printf ("Can't use keys or values with a \\\n");
+    return;
+  }
+
+  if (strchr (key, ';') || strchr (value, ';'))
+  {
+    Com_Printf ("Can't use keys or values with a semicolon\n");
+    return;
+  }
+
+  if (strchr (key, '\"') || strchr (value, '\"'))
+  {
+    Com_Printf ("Can't use keys or values with a \"\n");
+    return;
+  }
+
+  Info_RemoveKey_Big (s, key);
+  if (!value || !strlen(value))
+    return;
+
+  Com_sprintf (newi, sizeof(newi), "\\%s\\%s", key, value);
+
+  if (strlen(newi) + strlen(s) > BIG_INFO_STRING)
+  {
+    Com_Printf ("BIG Info string length exceeded\n");
+    return;
+  }
+
+  strcat (s, newi);
+}
+
+
+
+//====================================================================
diff --git a/src/game/q_shared.h b/src/game/q_shared.h
new file mode 100644
index 00000000..b4bc4f23
--- /dev/null
+++ b/src/game/q_shared.h
@@ -0,0 +1,1206 @@
+// Copyright (C) 1999-2000 Id Software, Inc.
+//
+
+/*
+ *  Portions Copyright (C) 2000-2001 Tim Angus
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*  To assertain which portions are licensed under the GPL and which are
+ *  licensed by Id Software, Inc. please run a diff between the equivalent
+ *  versions of the "Tremulous" modification and the unmodified "Quake3"
+ *  game source code.
+ */
+
+#ifndef __Q_SHARED_H
+#define __Q_SHARED_H
+
+// q_shared.h -- included first by ALL program modules.
+// A user mod should never modify this file
+
+#define Q3_VERSION    "Q3 1.27g"
+
+
+#define NEW_ANIMS
+#define MAX_TEAMNAME 32
+
+#ifdef _WIN32
+
+#pragma warning(disable : 4018)     // signed/unsigned mismatch
+#pragma warning(disable : 4032)
+#pragma warning(disable : 4051)
+#pragma warning(disable : 4057)   // slightly different base types
+#pragma warning(disable : 4100)   // unreferenced formal parameter
+#pragma warning(disable : 4115)
+#pragma warning(disable : 4125)   // decimal digit terminates octal escape sequence
+#pragma warning(disable : 4127)   // conditional expression is constant
+#pragma warning(disable : 4136)
+#pragma warning(disable : 4152)   // nonstandard extension, function/data pointer conversion in expression
+//#pragma warning(disable : 4201)
+//#pragma warning(disable : 4214)
+#pragma warning(disable : 4244)
+#pragma warning(disable : 4142)   // benign redefinition
+//#pragma warning(disable : 4305)   // truncation from const double to float
+//#pragma warning(disable : 4310)   // cast truncates constant value
+//#pragma warning(disable:  4505)   // unreferenced local function has been removed
+#pragma warning(disable : 4514)
+#pragma warning(disable : 4702)   // unreachable code
+#pragma warning(disable : 4711)   // selected for automatic inline expansion
+#pragma warning(disable : 4220)   // varargs matches remaining parameters
+#endif
+
+#if defined(ppc) || defined(__ppc) || defined(__ppc__) || defined(__POWERPC__)
+#define idppc 1
+#endif
+
+/**********************************************************************
+  VM Considerations
+
+  The VM can not use the standard system headers because we aren't really
+  using the compiler they were meant for.  We use bg_lib.h which contains
+  prototypes for the functions we define for our own use in bg_lib.c.
+
+  When writing mods, please add needed headers HERE, do not start including
+  stuff like <stdio.h> in the various .c files that make up each of the VMs
+  since you will be including system headers files can will have issues.
+
+  Remember, if you use a C library function that is not defined in bg_lib.c,
+  you will have to add your own version for support in the VM.
+
+ **********************************************************************/
+
+#ifdef Q3_VM
+
+#include "bg_lib.h"
+
+#else
+
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <ctype.h>
+#include <limits.h>
+
+#endif
+
+#ifdef _WIN32
+
+//#pragma intrinsic( memset, memcpy )
+
+#endif
+
+
+// this is the define for determining if we have an asm version of a C function
+#if (defined _M_IX86 || defined __i386__) && !defined __sun__  && !defined __LCC__
+#define id386 1
+#else
+#define id386 0
+#endif
+
+// for windows fastcall option
+
+#define QDECL
+
+//======================= WIN32 DEFINES =================================
+
+#ifdef WIN32
+
+#define MAC_STATIC
+
+#undef QDECL
+#define QDECL __cdecl
+
+// buildstring will be incorporated into the version string
+#ifdef NDEBUG
+#ifdef _M_IX86
+#define CPUSTRING "win-x86"
+#elif defined _M_ALPHA
+#define CPUSTRING "win-AXP"
+#endif
+#else
+#ifdef _M_IX86
+#define CPUSTRING "win-x86-debug"
+#elif defined _M_ALPHA
+#define CPUSTRING "win-AXP-debug"
+#endif
+#endif
+
+
+#define PATH_SEP '\\'
+
+#endif
+
+//======================= MAC OS X SERVER DEFINES =====================
+
+#if defined(__MACH__) && defined(__APPLE__)
+
+#define MAC_STATIC
+
+#ifdef __ppc__
+#define CPUSTRING "MacOSXS-ppc"
+#elif defined __i386__
+#define CPUSTRING "MacOSXS-i386"
+#else
+#define CPUSTRING "MacOSXS-other"
+#endif
+
+#define PATH_SEP  '/'
+
+#define GAME_HARD_LINKED
+#define CGAME_HARD_LINKED
+#define UI_HARD_LINKED
+#define BOTLIB_HARD_LINKED
+
+#endif
+
+//======================= MAC DEFINES =================================
+
+#ifdef __MACOS__
+
+#include <MacTypes.h>
+
+#define MAC_STATIC  static
+
+#define CPUSTRING "MacOS-PPC"
+
+#define PATH_SEP ':'
+
+#define GAME_HARD_LINKED
+#define CGAME_HARD_LINKED
+#define UI_HARD_LINKED
+#define BOTLIB_HARD_LINKED
+
+void Sys_PumpEvents( void );
+
+#endif
+
+//======================= LINUX DEFINES =================================
+
+// the mac compiler can't handle >32k of locals, so we
+// just waste space and make big arrays static...
+#ifdef __linux__
+
+#define MAC_STATIC
+
+#ifdef __i386__
+#define CPUSTRING "linux-i386"
+#elif defined __axp__
+#define CPUSTRING "linux-alpha"
+#else
+#define CPUSTRING "linux-other"
+#endif
+
+#define PATH_SEP '/'
+
+#endif
+
+//=============================================================
+
+
+typedef unsigned char     byte;
+
+typedef enum {qfalse, qtrue}  qboolean;
+
+typedef int   qhandle_t;
+typedef int   sfxHandle_t;
+typedef int   fileHandle_t;
+typedef int   clipHandle_t;
+
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+#define MAX_QINT      0x7fffffff
+#define MIN_QINT      (-MAX_QINT-1)
+
+
+// angle indexes
+#define PITCH       0   // up / down
+#define YAW         1   // left / right
+#define ROLL        2   // fall over
+
+// the game guarantees that no string from the network will ever
+// exceed MAX_STRING_CHARS
+#define MAX_STRING_CHARS  1024  // max length of a string passed to Cmd_TokenizeString
+#define MAX_STRING_TOKENS 256   // max tokens resulting from Cmd_TokenizeString
+#define MAX_TOKEN_CHARS   1024  // max length of an individual token
+
+#define MAX_INFO_STRING   1024
+#define MAX_INFO_KEY    1024
+#define MAX_INFO_VALUE    1024
+
+#define BIG_INFO_STRING   8192  // used for system info key only
+#define BIG_INFO_KEY      8192
+#define BIG_INFO_VALUE    8192
+
+#define MAX_QPATH     64    // max length of a quake game pathname
+#define MAX_OSPATH      256   // max length of a filesystem pathname
+
+#define MAX_NAME_LENGTH   32    // max length of a client name
+
+#define MAX_SAY_TEXT  150
+
+// paramters for command buffer stuffing
+typedef enum {
+  EXEC_NOW,     // don't return until completed, a VM should NEVER use this,
+            // because some commands might cause the VM to be unloaded...
+  EXEC_INSERT,    // insert at current position, but don't run yet
+  EXEC_APPEND     // add to end of the command buffer (normal case)
+} cbufExec_t;
+
+
+//
+// these aren't needed by any of the VMs.  put in another header?
+//
+#define MAX_MAP_AREA_BYTES    32    // bit vector of area visibility
+
+
+// print levels from renderer (FIXME: set up for game / cgame?)
+typedef enum {
+  PRINT_ALL,
+  PRINT_DEVELOPER,    // only print when "developer 1"
+  PRINT_WARNING,
+  PRINT_ERROR
+} printParm_t;
+
+#ifdef ERR_FATAL
+#undef ERR_FATAL      // this is be defined in malloc.h
+#endif
+
+// parameters to the main Error routine
+typedef enum {
+  ERR_FATAL,          // exit the entire game with a popup window
+  ERR_DROP,         // print to console and disconnect from game
+  ERR_SERVERDISCONNECT,   // don't kill server
+  ERR_DISCONNECT,       // client disconnected from the server
+  ERR_NEED_CD         // pop up the need-cd dialog
+} errorParm_t;
+
+
+// font rendering values used by ui and cgame
+
+#define PROP_GAP_WIDTH      3
+#define PROP_SPACE_WIDTH    8
+#define PROP_HEIGHT       27
+#define PROP_SMALL_SIZE_SCALE 0.75
+
+#define BLINK_DIVISOR     200
+#define PULSE_DIVISOR     75
+
+#define UI_LEFT     0x00000000  // default
+#define UI_CENTER   0x00000001
+#define UI_RIGHT    0x00000002
+#define UI_FORMATMASK 0x00000007
+#define UI_SMALLFONT  0x00000010
+#define UI_BIGFONT    0x00000020  // default
+#define UI_GIANTFONT  0x00000040
+#define UI_DROPSHADOW 0x00000800
+#define UI_BLINK    0x00001000
+#define UI_INVERSE    0x00002000
+#define UI_PULSE    0x00004000
+
+#if defined(_DEBUG) && !defined(BSPC)
+  #define HUNK_DEBUG
+#endif
+
+typedef enum {
+  h_high,
+  h_low,
+  h_dontcare
+} ha_pref;
+
+#ifdef HUNK_DEBUG
+#define Hunk_Alloc( size, preference )        Hunk_AllocDebug(size, preference, #size, __FILE__, __LINE__)
+void *Hunk_AllocDebug( int size, ha_pref preference, char *label, char *file, int line );
+#else
+void *Hunk_Alloc( int size, ha_pref preference );
+#endif
+
+void Com_Memset (void* dest, const int val, const size_t count);
+void Com_Memcpy (void* dest, const void* src, const size_t count);
+
+#define CIN_system  1
+#define CIN_loop  2
+#define CIN_hold  4
+#define CIN_silent  8
+#define CIN_shader  16
+
+/*
+==============================================================
+
+MATHLIB
+
+==============================================================
+*/
+
+
+typedef float vec_t;
+typedef vec_t vec2_t[2];
+typedef vec_t vec3_t[3];
+typedef vec_t vec4_t[4];
+typedef vec_t vec5_t[5];
+
+typedef int fixed4_t;
+typedef int fixed8_t;
+typedef int fixed16_t;
+
+#ifndef M_PI
+#define M_PI    3.14159265358979323846f  // matches value in gcc v2 math.h
+#endif
+
+#define NUMVERTEXNORMALS  162
+extern  vec3_t  bytedirs[NUMVERTEXNORMALS];
+
+// all drawing is done to a 640*480 virtual screen size
+// and will be automatically scaled to the real resolution
+#define SCREEN_WIDTH    640
+#define SCREEN_HEIGHT   480
+
+#define TINYCHAR_WIDTH    (SMALLCHAR_WIDTH)
+#define TINYCHAR_HEIGHT   (SMALLCHAR_HEIGHT/2)
+
+#define SMALLCHAR_WIDTH   8
+#define SMALLCHAR_HEIGHT  16
+
+#define BIGCHAR_WIDTH   16
+#define BIGCHAR_HEIGHT    16
+
+#define GIANTCHAR_WIDTH   32
+#define GIANTCHAR_HEIGHT  48
+
+extern  vec4_t    colorBlack;
+extern  vec4_t    colorRed;
+extern  vec4_t    colorGreen;
+extern  vec4_t    colorBlue;
+extern  vec4_t    colorYellow;
+extern  vec4_t    colorMagenta;
+extern  vec4_t    colorCyan;
+extern  vec4_t    colorWhite;
+extern  vec4_t    colorLtGrey;
+extern  vec4_t    colorMdGrey;
+extern  vec4_t    colorDkGrey;
+
+#define Q_COLOR_ESCAPE  '^'
+#define Q_IsColorString(p)  ( p && *(p) == Q_COLOR_ESCAPE && *((p)+1) && *((p)+1) != Q_COLOR_ESCAPE )
+
+#define COLOR_BLACK   '0'
+#define COLOR_RED   '1'
+#define COLOR_GREEN   '2'
+#define COLOR_YELLOW  '3'
+#define COLOR_BLUE    '4'
+#define COLOR_CYAN    '5'
+#define COLOR_MAGENTA '6'
+#define COLOR_WHITE   '7'
+#define ColorIndex(c) ( ( (c) - '0' ) & 7 )
+
+#define S_COLOR_BLACK "^0"
+#define S_COLOR_RED   "^1"
+#define S_COLOR_GREEN "^2"
+#define S_COLOR_YELLOW  "^3"
+#define S_COLOR_BLUE  "^4"
+#define S_COLOR_CYAN  "^5"
+#define S_COLOR_MAGENTA "^6"
+#define S_COLOR_WHITE "^7"
+
+extern vec4_t g_color_table[8];
+
+#define MAKERGB( v, r, g, b ) v[0]=r;v[1]=g;v[2]=b
+#define MAKERGBA( v, r, g, b, a ) v[0]=r;v[1]=g;v[2]=b;v[3]=a
+
+#define DEG2RAD( a ) ( ( (a) * M_PI ) / 180.0F )
+#define RAD2DEG( a ) ( ( (a) * 180.0f ) / M_PI )
+
+struct cplane_s;
+
+extern  vec3_t  vec3_origin;
+extern  vec3_t  axisDefault[3];
+
+#define nanmask (255<<23)
+
+#define IS_NAN(x) (((*(int *)&x)&nanmask)==nanmask)
+
+float Q_fabs( float f );
+float Q_rsqrt( float f );   // reciprocal square root
+
+#define SQRTFAST( x ) ( 1.0f / Q_rsqrt( x ) )
+
+signed char ClampChar( int i );
+signed short ClampShort( int i );
+
+// this isn't a real cheap function to call!
+int DirToByte( vec3_t dir );
+void ByteToDir( int b, vec3_t dir );
+
+#if 1
+
+#define DotProduct(x,y)     ((x)[0]*(y)[0]+(x)[1]*(y)[1]+(x)[2]*(y)[2])
+#define VectorSubtract(a,b,c) ((c)[0]=(a)[0]-(b)[0],(c)[1]=(a)[1]-(b)[1],(c)[2]=(a)[2]-(b)[2])
+#define VectorAdd(a,b,c)    ((c)[0]=(a)[0]+(b)[0],(c)[1]=(a)[1]+(b)[1],(c)[2]=(a)[2]+(b)[2])
+#define VectorCopy(a,b)     ((b)[0]=(a)[0],(b)[1]=(a)[1],(b)[2]=(a)[2])
+#define VectorScale(v, s, o)  ((o)[0]=(v)[0]*(s),(o)[1]=(v)[1]*(s),(o)[2]=(v)[2]*(s))
+#define VectorMA(v, s, b, o)  ((o)[0]=(v)[0]+(b)[0]*(s),(o)[1]=(v)[1]+(b)[1]*(s),(o)[2]=(v)[2]+(b)[2]*(s))
+
+#else
+
+#define DotProduct(x,y)     _DotProduct(x,y)
+#define VectorSubtract(a,b,c) _VectorSubtract(a,b,c)
+#define VectorAdd(a,b,c)    _VectorAdd(a,b,c)
+#define VectorCopy(a,b)     _VectorCopy(a,b)
+#define VectorScale(v, s, o)  _VectorScale(v,s,o)
+#define VectorMA(v, s, b, o)  _VectorMA(v,s,b,o)
+
+#endif
+
+#ifdef __LCC__
+#ifdef VectorCopy
+#undef VectorCopy
+// this is a little hack to get more efficient copies in our interpreter
+typedef struct {
+  float v[3];
+} vec3struct_t;
+#define VectorCopy(a,b) *(vec3struct_t *)b=*(vec3struct_t *)a;
+#endif
+#endif
+
+#define VectorClear(a)      ((a)[0]=(a)[1]=(a)[2]=0)
+#define VectorNegate(a,b)   ((b)[0]=-(a)[0],(b)[1]=-(a)[1],(b)[2]=-(a)[2])
+#define VectorSet(v, x, y, z) ((v)[0]=(x), (v)[1]=(y), (v)[2]=(z))
+#define Vector4Copy(a,b)    ((b)[0]=(a)[0],(b)[1]=(a)[1],(b)[2]=(a)[2],(b)[3]=(a)[3])
+
+#define SnapVector(v) {v[0]=((int)(v[0]));v[1]=((int)(v[1]));v[2]=((int)(v[2]));}
+
+// just in case you do't want to use the macros
+vec_t _DotProduct( const vec3_t v1, const vec3_t v2 );
+void _VectorSubtract( const vec3_t veca, const vec3_t vecb, vec3_t out );
+void _VectorAdd( const vec3_t veca, const vec3_t vecb, vec3_t out );
+void _VectorCopy( const vec3_t in, vec3_t out );
+void _VectorScale( const vec3_t in, float scale, vec3_t out );
+void _VectorMA( const vec3_t veca, float scale, const vec3_t vecb, vec3_t vecc );
+
+unsigned ColorBytes3 (float r, float g, float b);
+unsigned ColorBytes4 (float r, float g, float b, float a);
+
+float NormalizeColor( const vec3_t in, vec3_t out );
+
+float RadiusFromBounds( const vec3_t mins, const vec3_t maxs );
+void ClearBounds( vec3_t mins, vec3_t maxs );
+void AddPointToBounds( const vec3_t v, vec3_t mins, vec3_t maxs );
+int VectorCompare( const vec3_t v1, const vec3_t v2 );
+vec_t VectorLength( const vec3_t v );
+vec_t VectorLengthSquared( const vec3_t v );
+vec_t Distance( const vec3_t p1, const vec3_t p2 );
+vec_t DistanceSquared( const vec3_t p1, const vec3_t p2 );
+void CrossProduct( const vec3_t v1, const vec3_t v2, vec3_t cross );
+vec_t VectorNormalize (vec3_t v);   // returns vector length
+void VectorNormalizeFast(vec3_t v);   // does NOT return vector length, uses rsqrt approximation
+vec_t VectorNormalize2( const vec3_t v, vec3_t out );
+void VectorInverse (vec3_t v);
+void Vector4Scale( const vec4_t in, vec_t scale, vec4_t out );
+void VectorRotate( vec3_t in, vec3_t matrix[3], vec3_t out );
+int Q_log2(int val);
+
+float Q_acos(float c);
+
+int   Q_rand( int *seed );
+float Q_random( int *seed );
+float Q_crandom( int *seed );
+
+#define random()  ((rand () & 0x7fff) / ((float)0x7fff))
+#define crandom() (2.0 * (random() - 0.5))
+
+void vectoangles( const vec3_t value1, vec3_t angles);
+void AnglesToAxis( const vec3_t angles, vec3_t axis[3] );
+
+void AxisClear( vec3_t axis[3] );
+void AxisCopy( vec3_t in[3], vec3_t out[3] );
+
+void SetPlaneSignbits( struct cplane_s *out );
+int BoxOnPlaneSide (vec3_t emins, vec3_t emaxs, struct cplane_s *plane);
+
+float AngleMod(float a);
+float LerpAngle (float from, float to, float frac);
+float AngleSubtract( float a1, float a2 );
+void  AnglesSubtract( vec3_t v1, vec3_t v2, vec3_t v3 );
+
+float AngleNormalize360 ( float angle );
+float AngleNormalize180 ( float angle );
+float AngleDelta ( float angle1, float angle2 );
+
+qboolean PlaneFromPoints( vec4_t plane, const vec3_t a, const vec3_t b, const vec3_t c );
+void ProjectPointOnPlane( vec3_t dst, const vec3_t p, const vec3_t normal );
+void RotatePointAroundVector( vec3_t dst, const vec3_t dir, const vec3_t point, float degrees );
+void RotateAroundDirection( vec3_t axis[3], float yaw );
+void MakeNormalVectors( const vec3_t forward, vec3_t right, vec3_t up );
+// perpendicular vector could be replaced by this
+
+//int PlaneTypeForNormal (vec3_t normal);
+
+void MatrixMultiply(float in1[3][3], float in2[3][3], float out[3][3]);
+void AngleVectors( const vec3_t angles, vec3_t forward, vec3_t right, vec3_t up);
+void PerpendicularVector( vec3_t dst, const vec3_t src );
+
+//=============================================
+
+float Com_Clamp( float min, float max, float value );
+
+char  *COM_SkipPath( char *pathname );
+void  COM_StripExtension( const char *in, char *out );
+void  COM_DefaultExtension( char *path, int maxSize, const char *extension );
+
+void  COM_BeginParseSession( const char *name );
+int   COM_GetCurrentParseLine( void );
+char  *COM_Parse( char **data_p );
+char  *COM_ParseExt( char **data_p, qboolean allowLineBreak );
+int   COM_Compress( char *data_p );
+void  COM_ParseError( char *format, ... );
+void  COM_ParseWarning( char *format, ... );
+//int   COM_ParseInfos( char *buf, int max, char infos[][MAX_INFO_STRING] );
+
+#define MAX_TOKENLENGTH   1024
+
+#ifndef TT_STRING
+//token types
+#define TT_STRING         1     // string
+#define TT_LITERAL          2     // literal
+#define TT_NUMBER         3     // number
+#define TT_NAME           4     // name
+#define TT_PUNCTUATION        5     // punctuation
+#endif
+
+typedef struct pc_token_s
+{
+  int type;
+  int subtype;
+  int intvalue;
+  float floatvalue;
+  char string[MAX_TOKENLENGTH];
+} pc_token_t;
+
+// data is an in/out parm, returns a parsed out token
+
+void  COM_MatchToken( char**buf_p, char *match );
+
+void SkipBracedSection (char **program);
+void SkipRestOfLine ( char **data );
+
+void Parse1DMatrix (char **buf_p, int x, float *m);
+void Parse2DMatrix (char **buf_p, int y, int x, float *m);
+void Parse3DMatrix (char **buf_p, int z, int y, int x, float *m);
+
+void  QDECL Com_sprintf (char *dest, int size, const char *fmt, ...);
+
+
+// mode parm for FS_FOpenFile
+typedef enum {
+  FS_READ,
+  FS_WRITE,
+  FS_APPEND,
+  FS_APPEND_SYNC
+} fsMode_t;
+
+typedef enum {
+  FS_SEEK_CUR,
+  FS_SEEK_END,
+  FS_SEEK_SET
+} fsOrigin_t;
+
+//=============================================
+
+int Q_isprint( int c );
+int Q_islower( int c );
+int Q_isupper( int c );
+int Q_isalpha( int c );
+
+// portable case insensitive compare
+int   Q_stricmp (const char *s1, const char *s2);
+int   Q_strncmp (const char *s1, const char *s2, int n);
+int   Q_stricmpn (const char *s1, const char *s2, int n);
+char  *Q_strlwr( char *s1 );
+char  *Q_strupr( char *s1 );
+char  *Q_strrchr( const char* string, int c );
+
+// buffer size safe library replacements
+void  Q_strncpyz( char *dest, const char *src, int destsize );
+void  Q_strcat( char *dest, int size, const char *src );
+
+// strlen that discounts Quake color sequences
+int Q_PrintStrlen( const char *string );
+// removes color sequences from string
+char *Q_CleanStr( char *string );
+
+//=============================================
+
+// 64-bit integers for global rankings interface
+// implemented as a struct for qvm compatibility
+typedef struct
+{
+  byte  b0;
+  byte  b1;
+  byte  b2;
+  byte  b3;
+  byte  b4;
+  byte  b5;
+  byte  b6;
+  byte  b7;
+} qint64;
+
+//=============================================
+
+short BigShort(short l);
+short LittleShort(short l);
+int   BigLong (int l);
+int   LittleLong (int l);
+qint64  BigLong64 (qint64 l);
+qint64  LittleLong64 (qint64 l);
+float BigFloat (float l);
+float LittleFloat (float l);
+
+void  Swap_Init (void);
+char  * QDECL va(char *format, ...);
+
+//=============================================
+
+//
+// key / value info strings
+//
+char *Info_ValueForKey( const char *s, const char *key );
+void Info_RemoveKey( char *s, const char *key );
+void Info_RemoveKey_big( char *s, const char *key );
+void Info_SetValueForKey( char *s, const char *key, const char *value );
+void Info_SetValueForKey_Big( char *s, const char *key, const char *value );
+qboolean Info_Validate( const char *s );
+void Info_NextPair( const char **s, char *key, char *value );
+
+// this is only here so the functions in q_shared.c and bg_*.c can link
+void  QDECL Com_Error( int level, const char *error, ... );
+void  QDECL Com_Printf( const char *msg, ... );
+
+
+/*
+==========================================================
+
+CVARS (console variables)
+
+Many variables can be used for cheating purposes, so when
+cheats is zero, force all unspecified variables to their
+default values.
+==========================================================
+*/
+
+#define CVAR_ARCHIVE    1 // set to cause it to be saved to vars.rc
+                // used for system variables, not for player
+                // specific configurations
+#define CVAR_USERINFO   2 // sent to server on connect or change
+#define CVAR_SERVERINFO   4 // sent in response to front end requests
+#define CVAR_SYSTEMINFO   8 // these cvars will be duplicated on all clients
+#define CVAR_INIT     16  // don't allow change from console at all,
+                // but can be set from the command line
+#define CVAR_LATCH      32  // will only change when C code next does
+                // a Cvar_Get(), so it can't be changed
+                // without proper initialization.  modified
+                // will be set, even though the value hasn't
+                // changed yet
+#define CVAR_ROM      64  // display only, cannot be set by user at all
+#define CVAR_USER_CREATED 128 // created by a set command
+#define CVAR_TEMP     256 // can be set even when cheats are disabled, but is not archived
+#define CVAR_CHEAT      512 // can not be changed if cheats are disabled
+#define CVAR_NORESTART    1024  // do not clear when a cvar_restart is issued
+
+// nothing outside the Cvar_*() functions should modify these fields!
+typedef struct cvar_s {
+  char    *name;
+  char    *string;
+  char    *resetString;   // cvar_restart will reset to this value
+  char    *latchedString;   // for CVAR_LATCH vars
+  int     flags;
+  qboolean  modified;     // set each time the cvar is changed
+  int     modificationCount;  // incremented each time the cvar is changed
+  float   value;        // atof( string )
+  int     integer;      // atoi( string )
+  struct cvar_s *next;
+  struct cvar_s *hashNext;
+} cvar_t;
+
+#define MAX_CVAR_VALUE_STRING 256
+
+typedef int cvarHandle_t;
+
+// the modules that run in the virtual machine can't access the cvar_t directly,
+// so they must ask for structured updates
+typedef struct {
+  cvarHandle_t  handle;
+  int     modificationCount;
+  float   value;
+  int     integer;
+  char    string[MAX_CVAR_VALUE_STRING];
+} vmCvar_t;
+
+/*
+==============================================================
+
+COLLISION DETECTION
+
+==============================================================
+*/
+
+#include "surfaceflags.h"     // shared with the q3map utility
+
+// plane types are used to speed some tests
+// 0-2 are axial planes
+#define PLANE_X     0
+#define PLANE_Y     1
+#define PLANE_Z     2
+#define PLANE_NON_AXIAL 3
+
+/*
+=================
+PlaneTypeForNormal
+=================
+*/
+
+#define PlaneTypeForNormal(x) (x[0] == 1.0 ? PLANE_X : (x[1] == 1.0 ? PLANE_Y : (x[2] == 1.0 ? PLANE_Z : PLANE_NON_AXIAL) ) )
+
+// plane_t structure
+// !!! if this is changed, it must be changed in asm code too !!!
+typedef struct cplane_s {
+  vec3_t  normal;
+  float dist;
+  byte  type;     // for fast side tests: 0,1,2 = axial, 3 = nonaxial
+  byte  signbits;   // signx + (signy<<1) + (signz<<2), used as lookup during collision
+  byte  pad[2];
+} cplane_t;
+
+
+// a trace is returned when a box is swept through the world
+typedef struct {
+  qboolean  allsolid; // if true, plane is not valid
+  qboolean  startsolid; // if true, the initial point was in a solid area
+  float   fraction; // time completed, 1.0 = didn't hit anything
+  vec3_t    endpos;   // final position
+  cplane_t  plane;    // surface normal at impact, transformed to world space
+  int     surfaceFlags; // surface hit
+  int     contents; // contents on other side of surface hit
+  int     entityNum;  // entity the contacted sirface is a part of
+} trace_t;
+
+// trace->entityNum can also be 0 to (MAX_GENTITIES-1)
+// or ENTITYNUM_NONE, ENTITYNUM_WORLD
+
+
+// markfragments are returned by CM_MarkFragments()
+typedef struct {
+  int   firstPoint;
+  int   numPoints;
+} markFragment_t;
+
+
+
+typedef struct {
+  vec3_t    origin;
+  vec3_t    axis[3];
+} orientation_t;
+
+//=====================================================================
+
+
+// in order from highest priority to lowest
+// if none of the catchers are active, bound key strings will be executed
+#define KEYCATCH_CONSOLE    0x0001
+#define KEYCATCH_UI         0x0002
+#define KEYCATCH_MESSAGE    0x0004
+#define KEYCATCH_CGAME      0x0008
+
+// sound channels
+// channel 0 never willingly overrides
+// other channels will allways override a playing sound on that channel
+typedef enum {
+  CHAN_AUTO,
+  CHAN_LOCAL,   // menu sounds, etc
+  CHAN_WEAPON,
+  CHAN_VOICE,
+  CHAN_ITEM,
+  CHAN_BODY,
+  CHAN_LOCAL_SOUND, // chat messages, etc
+  CHAN_ANNOUNCER    // announcer voices, etc
+} soundChannel_t;
+
+
+/*
+========================================================================
+
+  ELEMENTS COMMUNICATED ACROSS THE NET
+
+========================================================================
+*/
+
+#define ANGLE2SHORT(x)  ((int)((x)*65536/360) & 65535)
+#define SHORT2ANGLE(x)  ((x)*(360.0/65536))
+
+#define SNAPFLAG_RATE_DELAYED 1
+#define SNAPFLAG_NOT_ACTIVE   2 // snapshot used during connection and for zombies
+#define SNAPFLAG_SERVERCOUNT  4 // toggled every map_restart so transitions can be detected
+
+//
+// per-level limits
+//
+#define MAX_CLIENTS     64   // absolute limit
+#define MAX_LOCATIONS   64
+
+#define GENTITYNUM_BITS   10    // don't need to send any more
+#define MAX_GENTITIES   (1<<GENTITYNUM_BITS)
+
+// entitynums are communicated with GENTITY_BITS, so any reserved
+// values thatare going to be communcated over the net need to
+// also be in this range
+#define ENTITYNUM_NONE    (MAX_GENTITIES-1)
+#define ENTITYNUM_WORLD   (MAX_GENTITIES-2)
+#define ENTITYNUM_MAX_NORMAL  (MAX_GENTITIES-2)
+
+
+#define MAX_MODELS      256   // these are sent over the net as 8 bits
+#define MAX_SOUNDS      256   // so they cannot be blindly increased
+
+
+#define MAX_CONFIGSTRINGS 1024
+
+// these are the only configstrings that the system reserves, all the
+// other ones are strictly for servergame to clientgame communication
+#define CS_SERVERINFO   0   // an info string with all the serverinfo cvars
+#define CS_SYSTEMINFO   1   // an info string for server system to client system configuration (timescale, etc)
+
+#define RESERVED_CONFIGSTRINGS  2 // game can't modify below this, only the system can
+
+#define MAX_GAMESTATE_CHARS 16000
+typedef struct {
+  int     stringOffsets[MAX_CONFIGSTRINGS];
+  char    stringData[MAX_GAMESTATE_CHARS];
+  int     dataCount;
+} gameState_t;
+
+//=========================================================
+
+// bit field limits
+#define MAX_STATS         16
+#define MAX_PERSISTANT    16
+#define MAX_POWERUPS      16 
+#define MAX_WEAPONS       16
+
+#define MAX_PS_EVENTS     2
+
+#define PS_PMOVEFRAMECOUNTBITS  6
+
+// playerState_t is the information needed by both the client and server
+// to predict player motion and actions
+// nothing outside of pmove should modify these, or some degree of prediction error
+// will occur
+
+// you can't add anything to this without modifying the code in msg.c
+
+// playerState_t is a full superset of entityState_t as it is used by players,
+// so if a playerState_t is transmitted, the entityState_t can be fully derived
+// from it.
+typedef struct playerState_s {
+  int     commandTime;  // cmd->serverTime of last executed command
+  int     pm_type;
+  int     bobCycle;   // for view bobbing and footstep generation
+  int     pm_flags;   // ducked, jump_held, etc
+  int     pm_time;
+
+  vec3_t    origin;
+  vec3_t    velocity;
+  int     weaponTime;
+  int     gravity;
+  int     speed;
+  int     delta_angles[3];  // add to command angles to get view direction
+                  // changed by spawns, rotating objects, and teleporters
+
+  int     groundEntityNum;// ENTITYNUM_NONE = in air
+
+  int     legsTimer;    // don't change low priority animations until this runs out
+  int     legsAnim;   // mask off ANIM_TOGGLEBIT
+
+  int     torsoTimer;   // don't change low priority animations until this runs out
+  int     torsoAnim;    // mask off ANIM_TOGGLEBIT
+
+  int     movementDir;  // a number 0 to 7 that represents the reletive angle
+                // of movement to the view angle (axial and diagonals)
+                // when at rest, the value will remain unchanged
+                // used to twist the legs during strafing
+
+  //TA: this is also used by wall climbing classes As I can't add anything to the
+  //    playerState_t struct.This means wall climbing classes won't ever be able to use
+  //    a grapple hook. Does this matter?
+  vec3_t    grapplePoint; // location of grapple to pull towards if PMF_GRAPPLE_PULL
+
+  int     eFlags;     // copied to entityState_t->eFlags
+
+  int     eventSequence;  // pmove generated events
+  int     events[MAX_PS_EVENTS];
+  int     eventParms[MAX_PS_EVENTS];
+
+  int     externalEvent;  // events set on player from another source
+  int     externalEventParm;
+  int     externalEventTime;
+
+  int     clientNum;    // ranges from 0 to MAX_CLIENTS-1
+  int     weapon;     // copied to entityState_t->weapon
+  int     weaponstate;
+
+  vec3_t    viewangles;   // for fixed views
+  int     viewheight;
+
+  // damage feedback
+  int     damageEvent;  // when it changes, latch the other parms
+  int     damageYaw;
+  int     damagePitch;
+  int     damageCount;
+
+  int     stats[MAX_STATS];
+  int     persistant[MAX_PERSISTANT]; // stats that aren't cleared on death
+  int     powerups[MAX_POWERUPS]; // level.time that the powerup runs out
+  int     ammo[MAX_WEAPONS];
+
+  int     generic1;
+  int     loopSound;
+  int     jumppad_ent;  // jumppad entity hit this frame
+  
+  // not communicated over the net at all
+  int     ping;     // server to game info for scoreboard
+  int     pmove_framecount; // FIXME: don't transmit over the network
+  int     jumppad_frame;
+  int     entityEventSequence;
+} playerState_t;
+
+
+//====================================================================
+
+
+//
+// usercmd_t->button bits, many of which are generated by the client system,
+// so they aren't game/cgame only definitions
+//
+#define BUTTON_ATTACK   1
+#define BUTTON_TALK     2     // displays talk balloon and disables actions
+#define BUTTON_USE_HOLDABLE 4
+#define BUTTON_GESTURE    8
+#define BUTTON_WALKING    16      // walking can't just be infered from MOVE_RUN
+                    // because a key pressed late in the frame will
+                    // only generate a small move value for that frame
+                    // walking will use different animations and
+                    // won't generate footsteps
+#define BUTTON_AFFIRMATIVE  32
+#define BUTTON_NEGATIVE   64
+
+#define BUTTON_GETFLAG    128
+#define BUTTON_GUARDBASE  256
+#define BUTTON_PATROL   512
+#define BUTTON_FOLLOWME   1024
+
+#define BUTTON_ANY      2048      // any key whatsoever
+
+#define MOVE_RUN      120     // if forwardmove or rightmove are >= MOVE_RUN,
+                    // then BUTTON_WALKING should be set
+
+
+// usercmd_t is sent to the server each client frame
+typedef struct usercmd_s {
+  int   serverTime;
+  int   angles[3];
+  int   buttons;
+  byte  weapon; //weapon
+  signed char forwardmove, rightmove, upmove;
+} usercmd_t;
+
+//===================================================================
+
+// if entityState->solid == SOLID_BMODEL, modelindex is an inline model number
+#define SOLID_BMODEL  0xffffff
+
+typedef enum {
+  TR_STATIONARY,
+  TR_INTERPOLATE,       // non-parametric, but interpolate between snapshots
+  TR_LINEAR,
+  TR_LINEAR_STOP,
+  TR_SINE,          // value = base + sin( time / duration ) * delta
+  TR_GRAVITY
+} trType_t;
+
+typedef struct {
+  trType_t  trType;
+  int   trTime;
+  int   trDuration;     // if non 0, trTime + trDuration = stop time
+  vec3_t  trBase;
+  vec3_t  trDelta;      // velocity, etc
+} trajectory_t;
+
+// entityState_t is the information conveyed from the server
+// in an update message about entities that the client will
+// need to render in some way
+// Different eTypes may use the information in different ways
+// The messages are delta compressed, so it doesn't really matter if
+// the structure size is fairly large
+
+typedef struct entityState_s {
+  int   number;     // entity index
+  int   eType;      // entityType_t
+  int   eFlags;
+
+  trajectory_t  pos;  // for calculating position
+  trajectory_t  apos; // for calculating angles
+
+  int   time;
+  int   time2;
+
+  vec3_t  origin;
+  vec3_t  origin2;
+
+  vec3_t  angles;
+  vec3_t  angles2;
+
+  int   otherEntityNum; // shotgun sources, etc
+  int   otherEntityNum2;
+
+  int   groundEntityNum;  // -1 = in air
+
+  int   constantLight;  // r + (g<<8) + (b<<16) + (intensity<<24)
+  int   loopSound;    // constantly loop this sound
+
+  int   modelindex;
+  int   modelindex2;
+  int   clientNum;    // 0 to (MAX_CLIENTS - 1), for players and corpses
+  int   frame;
+
+  int   solid;      // for client side prediction, trap_linkentity sets this properly
+
+  int   event;      // impulse events -- muzzle flashes, footsteps, etc
+  int   eventParm;
+
+  // for players
+  int   powerups;   // bit flags
+  int   weapon;     // determines weapon and flash model, etc
+  int   legsAnim;   // mask off ANIM_TOGGLEBIT
+  int   torsoAnim;    // mask off ANIM_TOGGLEBIT
+
+  int   generic1;
+} entityState_t;
+
+typedef enum {
+  CA_UNINITIALIZED,
+  CA_DISCONNECTED,  // not talking to a server
+  CA_AUTHORIZING,   // not used any more, was checking cd key
+  CA_CONNECTING,    // sending request packets to the server
+  CA_CHALLENGING,   // sending challenge packets to the server
+  CA_CONNECTED,   // netchan_t established, getting gamestate
+  CA_LOADING,     // only during cgame initialization, never during main loop
+  CA_PRIMED,      // got gamestate, waiting for first frame
+  CA_ACTIVE,      // game views should be displayed
+  CA_CINEMATIC    // playing a cinematic or a static pic, not connected to a server
+} connstate_t;
+
+// font support 
+
+#define GLYPH_START 0
+#define GLYPH_END 255
+#define GLYPH_CHARSTART 32
+#define GLYPH_CHAREND 127
+#define GLYPHS_PER_FONT GLYPH_END - GLYPH_START + 1
+typedef struct {
+  int height;       // number of scan lines
+  int top;          // top of glyph in buffer
+  int bottom;       // bottom of glyph in buffer
+  int pitch;        // width for copying
+  int xSkip;        // x adjustment
+  int imageWidth;   // width of actual image
+  int imageHeight;  // height of actual image
+  float s;          // x offset in image where glyph starts
+  float t;          // y offset in image where glyph starts
+  float s2;
+  float t2;
+  qhandle_t glyph;  // handle to the shader with the glyph
+  char shaderName[32];
+} glyphInfo_t;
+
+typedef struct {
+  glyphInfo_t glyphs [GLYPHS_PER_FONT];
+  float glyphScale;
+  char name[MAX_QPATH];
+} fontInfo_t;
+
+#define Square(x) ((x)*(x))
+
+// real time
+//=============================================
+
+
+typedef struct qtime_s {
+  int tm_sec;     /* seconds after the minute - [0,59] */
+  int tm_min;     /* minutes after the hour - [0,59] */
+  int tm_hour;    /* hours since midnight - [0,23] */
+  int tm_mday;    /* day of the month - [1,31] */
+  int tm_mon;     /* months since January - [0,11] */
+  int tm_year;    /* years since 1900 */
+  int tm_wday;    /* days since Sunday - [0,6] */
+  int tm_yday;    /* days since January 1 - [0,365] */
+  int tm_isdst;   /* daylight savings time flag */
+} qtime_t;
+
+
+// server browser sources
+#define AS_LOCAL      0
+#define AS_MPLAYER    1
+#define AS_GLOBAL     2
+#define AS_FAVORITES  3
+
+
+// cinematic states
+typedef enum {
+  FMV_IDLE,
+  FMV_PLAY,   // play
+  FMV_EOF,    // all other conditions, i.e. stop/EOF/abort
+  FMV_ID_BLT,
+  FMV_ID_IDLE,
+  FMV_LOOPED,
+  FMV_ID_WAIT
+} e_status;
+
+typedef enum _flag_status {
+  FLAG_ATBASE = 0,
+  FLAG_TAKEN,     // CTF
+  FLAG_TAKEN_RED,   // One Flag CTF
+  FLAG_TAKEN_BLUE,  // One Flag CTF
+  FLAG_DROPPED
+} flagStatus_t;
+
+
+
+#define MAX_GLOBAL_SERVERS      2048
+#define MAX_OTHER_SERVERS     128
+#define MAX_PINGREQUESTS      16
+#define MAX_SERVERSTATUSREQUESTS  16
+
+#define SAY_ALL   0
+#define SAY_TEAM  1
+#define SAY_TELL  2
+
+#define CDKEY_LEN 16
+#define CDCHKSUM_LEN 2
+
+#endif  // __Q_SHARED_H