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- // Copyright (C) 1999-2000 Id Software, Inc.
- //
- // 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];
-
- /*
- ===================
- 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" );
- }
-
- // 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] ) );
- }
- }
-
-
- /*
- ===============
- 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 );
- }
- }
-
-