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-rw-r--r--src/cgame/cg_marks.c289
1 files changed, 289 insertions, 0 deletions
diff --git a/src/cgame/cg_marks.c b/src/cgame/cg_marks.c
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+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+Copyright (C) 2000-2009 Darklegion Development
+
+This file is part of Tremulous.
+
+Tremulous 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 of the License,
+or (at your option) any later version.
+
+Tremulous 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 Tremulous; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+===========================================================================
+*/
+
+// cg_marks.c -- wall marks
+
+
+#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 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 );
+ }
+}
+
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