1.27 import

1 files changed, 298 insertions, 0 deletions

diff --git a/src/cgame/cg_marks.c b/src/cgame/cg_marks.c
new file mode 100644
index 00000000..00fc89c2
--- /dev/null
+++ b/src/cgame/cg_marks.c
@@ -0,0 +1,298 @@
+// Copyright (C) 1999-2000 Id Software, Inc.
+//
+// cg_marks.c -- wall marks
+
+/*
+ *  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 "cg_local.h"
+
+/*
+===================================================================
+
+MARK POLYS
+
+===================================================================
+*/
+
+
+markPoly_t	cg_activeMarkPolys;			// double linked list
+markPoly_t	*cg_freeMarkPolys;			// single linked list
+markPoly_t	cg_markPolys[MAX_MARK_POLYS];
+static    int markTotal;
+
+/*
+===================
+CG_InitMarkPolys
+
+This is called at startup and for tournement restarts
+===================
+*/
+void	CG_InitMarkPolys( void ) {
+	int		i;
+
+	memset( cg_markPolys, 0, sizeof(cg_markPolys) );
+
+	cg_activeMarkPolys.nextMark = &cg_activeMarkPolys;
+	cg_activeMarkPolys.prevMark = &cg_activeMarkPolys;
+	cg_freeMarkPolys = cg_markPolys;
+	for ( i = 0 ; i < MAX_MARK_POLYS - 1 ; i++ ) {
+		cg_markPolys[i].nextMark = &cg_markPolys[i+1];
+	}
+}
+
+
+/*
+==================
+CG_FreeMarkPoly
+==================
+*/
+void CG_FreeMarkPoly( markPoly_t *le ) {
+	if ( !le->prevMark ) {
+		CG_Error( "CG_FreeLocalEntity: not active" );
+	}
+
+	// remove from the doubly linked active list
+	le->prevMark->nextMark = le->nextMark;
+	le->nextMark->prevMark = le->prevMark;
+
+	// the free list is only singly linked
+	le->nextMark = cg_freeMarkPolys;
+	cg_freeMarkPolys = le;
+}
+
+/*
+===================
+CG_AllocMark
+
+Will allways succeed, even if it requires freeing an old active mark
+===================
+*/
+markPoly_t	*CG_AllocMark( void ) {
+	markPoly_t	*le;
+	int time;
+
+	if ( !cg_freeMarkPolys ) {
+		// no free entities, so free the one at the end of the chain
+		// remove the oldest active entity
+		time = cg_activeMarkPolys.prevMark->time;
+		while (cg_activeMarkPolys.prevMark && time == cg_activeMarkPolys.prevMark->time) {
+			CG_FreeMarkPoly( cg_activeMarkPolys.prevMark );
+		}
+	}
+
+	le = cg_freeMarkPolys;
+	cg_freeMarkPolys = cg_freeMarkPolys->nextMark;
+
+	memset( le, 0, sizeof( *le ) );
+
+	// link into the active list
+	le->nextMark = cg_activeMarkPolys.nextMark;
+	le->prevMark = &cg_activeMarkPolys;
+	cg_activeMarkPolys.nextMark->prevMark = le;
+	cg_activeMarkPolys.nextMark = le;
+	return le;
+}
+
+
+
+/*
+=================
+CG_ImpactMark
+
+origin should be a point within a unit of the plane
+dir should be the plane normal
+
+temporary marks will not be stored or randomly oriented, but immediately
+passed to the renderer.
+=================
+*/
+#define	MAX_MARK_FRAGMENTS	128
+#define	MAX_MARK_POINTS		384
+
+void CG_ImpactMark( qhandle_t markShader, const vec3_t origin, const vec3_t dir, 
+				   float orientation, float red, float green, float blue, float alpha,
+				   qboolean alphaFade, float radius, qboolean temporary ) {
+	vec3_t			axis[3];
+	float			texCoordScale;
+	vec3_t			originalPoints[4];
+	byte			colors[4];
+	int				i, j;
+	int				numFragments;
+	markFragment_t	markFragments[MAX_MARK_FRAGMENTS], *mf;
+	vec3_t			markPoints[MAX_MARK_POINTS];
+	vec3_t			projection;
+
+	if ( !cg_addMarks.integer ) {
+		return;
+	}
+
+	if ( radius <= 0 ) {
+		CG_Error( "CG_ImpactMark called with <= 0 radius" );
+	}
+
+  //if ( markTotal >= MAX_MARK_POLYS ) {
+  //  return;
+  //}
+
+	// create the texture axis
+	VectorNormalize2( dir, axis[0] );
+	PerpendicularVector( axis[1], axis[0] );
+	RotatePointAroundVector( axis[2], axis[0], axis[1], orientation );
+	CrossProduct( axis[0], axis[2], axis[1] );
+
+	texCoordScale = 0.5 * 1.0 / radius;
+
+	// create the full polygon
+	for ( i = 0 ; i < 3 ; i++ ) {
+		originalPoints[0][i] = origin[i] - radius * axis[1][i] - radius * axis[2][i];
+		originalPoints[1][i] = origin[i] + radius * axis[1][i] - radius * axis[2][i];
+		originalPoints[2][i] = origin[i] + radius * axis[1][i] + radius * axis[2][i];
+		originalPoints[3][i] = origin[i] - radius * axis[1][i] + radius * axis[2][i];
+	}
+
+	// get the fragments
+	VectorScale( dir, -20, projection );
+	numFragments = trap_CM_MarkFragments( 4, (void *)originalPoints,
+					projection, MAX_MARK_POINTS, markPoints[0],
+					MAX_MARK_FRAGMENTS, markFragments );
+
+	colors[0] = red * 255;
+	colors[1] = green * 255;
+	colors[2] = blue * 255;
+	colors[3] = alpha * 255;
+
+	for ( i = 0, mf = markFragments ; i < numFragments ; i++, mf++ ) {
+		polyVert_t	*v;
+		polyVert_t	verts[MAX_VERTS_ON_POLY];
+		markPoly_t	*mark;
+
+		// we have an upper limit on the complexity of polygons
+		// that we store persistantly
+		if ( mf->numPoints > MAX_VERTS_ON_POLY ) {
+			mf->numPoints = MAX_VERTS_ON_POLY;
+		}
+		for ( j = 0, v = verts ; j < mf->numPoints ; j++, v++ ) {
+			vec3_t		delta;
+
+			VectorCopy( markPoints[mf->firstPoint + j], v->xyz );
+
+			VectorSubtract( v->xyz, origin, delta );
+			v->st[0] = 0.5 + DotProduct( delta, axis[1] ) * texCoordScale;
+			v->st[1] = 0.5 + DotProduct( delta, axis[2] ) * texCoordScale;
+			*(int *)v->modulate = *(int *)colors;
+		}
+
+		// if it is a temporary (shadow) mark, add it immediately and forget about it
+		if ( temporary ) {
+			trap_R_AddPolyToScene( markShader, mf->numPoints, verts );
+			continue;
+		}
+
+		// otherwise save it persistantly
+		mark = CG_AllocMark();
+		mark->time = cg.time;
+		mark->alphaFade = alphaFade;
+		mark->markShader = markShader;
+		mark->poly.numVerts = mf->numPoints;
+		mark->color[0] = red;
+		mark->color[1] = green;
+		mark->color[2] = blue;
+		mark->color[3] = alpha;
+		memcpy( mark->verts, verts, mf->numPoints * sizeof( verts[0] ) );
+    markTotal++;    
+	}
+}
+
+
+/*
+===============
+CG_AddMarks
+===============
+*/
+#define	MARK_TOTAL_TIME		10000
+#define	MARK_FADE_TIME		1000
+
+void CG_AddMarks( void ) {
+	int			j;
+	markPoly_t	*mp, *next;
+	int			t;
+	int			fade;
+
+	if ( !cg_addMarks.integer ) {
+		return;
+	}
+
+	mp = cg_activeMarkPolys.nextMark;
+	for ( ; mp != &cg_activeMarkPolys ; mp = next ) {
+		// grab next now, so if the local entity is freed we
+		// still have it
+		next = mp->nextMark;
+
+		// see if it is time to completely remove it
+		if ( cg.time > mp->time + MARK_TOTAL_TIME ) {
+			CG_FreeMarkPoly( mp );
+			continue;
+		}
+
+		// fade out the energy bursts
+		if ( mp->markShader == cgs.media.energyMarkShader ) {
+
+			fade = 450 - 450 * ( (cg.time - mp->time ) / 3000.0 );
+			if ( fade < 255 ) {
+				if ( fade < 0 ) {
+					fade = 0;
+				}
+				if ( mp->verts[0].modulate[0] != 0 ) {
+					for ( j = 0 ; j < mp->poly.numVerts ; j++ ) {
+						mp->verts[j].modulate[0] = mp->color[0] * fade;
+						mp->verts[j].modulate[1] = mp->color[1] * fade;
+						mp->verts[j].modulate[2] = mp->color[2] * fade;
+					}
+				}
+			}
+		}
+
+		// fade all marks out with time
+		t = mp->time + MARK_TOTAL_TIME - cg.time;
+		if ( t < MARK_FADE_TIME ) {
+			fade = 255 * t / MARK_FADE_TIME;
+			if ( mp->alphaFade ) {
+				for ( j = 0 ; j < mp->poly.numVerts ; j++ ) {
+					mp->verts[j].modulate[3] = fade;
+				}
+			} else {
+				for ( j = 0 ; j < mp->poly.numVerts ; j++ ) {
+					mp->verts[j].modulate[0] = mp->color[0] * fade;
+					mp->verts[j].modulate[1] = mp->color[1] * fade;
+					mp->verts[j].modulate[2] = mp->color[2] * fade;
+				}
+			}
+		}
+
+
+		trap_R_AddPolyToScene( mp->markShader, mp->poly.numVerts, mp->verts );
+	}
+}
+