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Diffstat (limited to 'src/cgame/cg_marks.c')
| -rw-r--r-- | src/cgame/cg_marks.c | 298 |
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 ); + } +} + |