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