422 lines
12 KiB
C++
422 lines
12 KiB
C++
/*
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===========================================================================
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Doom 3 GPL Source Code
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Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company.
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This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).
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Doom 3 Source Code is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Doom 3 Source Code is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Doom 3 Source Code. If not, see <http://www.gnu.org/licenses/>.
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In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code. If not, please request a copy in writing from id Software at the address below.
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If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
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===========================================================================
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*/
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#include "../idlib/precompiled.h"
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#pragma hdrstop
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#include "Game_local.h"
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static const char *smokeParticle_SnapshotName = "_SmokeParticle_Snapshot_";
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/*
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================
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idSmokeParticles::idSmokeParticles
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================
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*/
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idSmokeParticles::idSmokeParticles( void ) {
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initialized = false;
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memset( &renderEntity, 0, sizeof( renderEntity ) );
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renderEntityHandle = -1;
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memset( smokes, 0, sizeof( smokes ) );
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freeSmokes = NULL;
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numActiveSmokes = 0;
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currentParticleTime = -1;
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}
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/*
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================
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idSmokeParticles::Init
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================
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*/
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void idSmokeParticles::Init( void ) {
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if ( initialized ) {
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Shutdown();
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}
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// set up the free list
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for ( int i = 0; i < MAX_SMOKE_PARTICLES-1; i++ ) {
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smokes[i].next = &smokes[i+1];
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}
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smokes[MAX_SMOKE_PARTICLES-1].next = NULL;
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freeSmokes = &smokes[0];
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numActiveSmokes = 0;
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activeStages.Clear();
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memset( &renderEntity, 0, sizeof( renderEntity ) );
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renderEntity.bounds.Clear();
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renderEntity.axis = mat3_identity;
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renderEntity.shaderParms[ SHADERPARM_RED ] = 1;
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renderEntity.shaderParms[ SHADERPARM_GREEN ] = 1;
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renderEntity.shaderParms[ SHADERPARM_BLUE ] = 1;
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renderEntity.shaderParms[3] = 1;
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renderEntity.hModel = renderModelManager->AllocModel();
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renderEntity.hModel->InitEmpty( smokeParticle_SnapshotName );
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// we certainly don't want particle shadows
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renderEntity.noShadow = 1;
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// huge bounds, so it will be present in every world area
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renderEntity.bounds.AddPoint( idVec3(-100000, -100000, -100000) );
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renderEntity.bounds.AddPoint( idVec3( 100000, 100000, 100000) );
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renderEntity.callback = idSmokeParticles::ModelCallback;
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// add to renderer list
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renderEntityHandle = gameRenderWorld->AddEntityDef( &renderEntity );
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currentParticleTime = -1;
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initialized = true;
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}
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/*
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================
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idSmokeParticles::Shutdown
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================
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*/
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void idSmokeParticles::Shutdown( void ) {
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// make sure the render entity is freed before the model is freed
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if ( renderEntityHandle != -1 ) {
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gameRenderWorld->FreeEntityDef( renderEntityHandle );
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renderEntityHandle = -1;
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}
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if ( renderEntity.hModel != NULL ) {
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renderModelManager->FreeModel( renderEntity.hModel );
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renderEntity.hModel = NULL;
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}
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initialized = false;
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}
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/*
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================
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idSmokeParticles::FreeSmokes
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================
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*/
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void idSmokeParticles::FreeSmokes( void ) {
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for ( int activeStageNum = 0; activeStageNum < activeStages.Num(); activeStageNum++ ) {
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singleSmoke_t *smoke, *next, *last;
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activeSmokeStage_t *active = &activeStages[activeStageNum];
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const idParticleStage *stage = active->stage;
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for ( last = NULL, smoke = active->smokes; smoke; smoke = next ) {
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next = smoke->next;
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float frac = (float)( gameLocal.time - smoke->privateStartTime ) / ( stage->particleLife * 1000 );
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if ( frac >= 1.0f ) {
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// remove the particle from the stage list
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if ( last != NULL ) {
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last->next = smoke->next;
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} else {
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active->smokes = smoke->next;
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}
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// put the particle on the free list
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smoke->next = freeSmokes;
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freeSmokes = smoke;
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numActiveSmokes--;
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continue;
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}
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last = smoke;
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}
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if ( !active->smokes ) {
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// remove this from the activeStages list
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activeStages.RemoveIndex( activeStageNum );
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activeStageNum--;
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}
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}
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}
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/*
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================
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idSmokeParticles::EmitSmoke
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Called by game code to drop another particle into the list
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================
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*/
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bool idSmokeParticles::EmitSmoke( const idDeclParticle *smoke, const int systemStartTime, const float diversity, const idVec3 &origin, const idMat3 &axis ) {
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bool continues = false;
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if ( !smoke ) {
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return false;
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}
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if ( !gameLocal.isNewFrame ) {
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return false;
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}
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// dedicated doesn't smoke. No UpdateRenderEntity, so they would not be freed
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if ( gameLocal.localClientNum < 0 ) {
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return false;
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}
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assert( gameLocal.time == 0 || systemStartTime <= gameLocal.time );
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if ( systemStartTime > gameLocal.time ) {
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return false;
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}
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idRandom steppingRandom( 0xffff * diversity );
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// for each stage in the smoke that is still emitting particles, emit a new singleSmoke_t
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for ( int stageNum = 0; stageNum < smoke->stages.Num(); stageNum++ ) {
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const idParticleStage *stage = smoke->stages[stageNum];
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if ( !stage->cycleMsec ) {
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continue;
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}
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if ( !stage->material ) {
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continue;
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}
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if ( stage->particleLife <= 0 ) {
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continue;
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}
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// see how many particles we should emit this tic
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// FIXME: smoke.privateStartTime += stage->timeOffset;
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int finalParticleTime = stage->cycleMsec * stage->spawnBunching;
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int deltaMsec = gameLocal.time - systemStartTime;
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int nowCount, prevCount;
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if ( finalParticleTime == 0 ) {
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// if spawnBunching is 0, they will all come out at once
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if ( gameLocal.time == systemStartTime ) {
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prevCount = -1;
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nowCount = stage->totalParticles-1;
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} else {
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prevCount = stage->totalParticles;
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}
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} else {
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nowCount = floor( ( (float)deltaMsec / finalParticleTime ) * stage->totalParticles );
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if ( nowCount >= stage->totalParticles ) {
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nowCount = stage->totalParticles-1;
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}
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prevCount = floor( ((float)( deltaMsec - USERCMD_MSEC ) / finalParticleTime) * stage->totalParticles );
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if ( prevCount < -1 ) {
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prevCount = -1;
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}
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}
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if ( prevCount >= stage->totalParticles ) {
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// no more particles from this stage
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continue;
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}
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if ( nowCount < stage->totalParticles-1 ) {
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// the system will need to emit particles next frame as well
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continues = true;
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}
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// find an activeSmokeStage that matches this
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activeSmokeStage_t *active;
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int i;
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for ( i = 0 ; i < activeStages.Num() ; i++ ) {
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active = &activeStages[i];
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if ( active->stage == stage ) {
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break;
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}
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}
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if ( i == activeStages.Num() ) {
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// add a new one
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activeSmokeStage_t newActive;
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newActive.smokes = NULL;
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newActive.stage = stage;
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i = activeStages.Append( newActive );
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active = &activeStages[i];
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}
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// add all the required particles
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for ( prevCount++ ; prevCount <= nowCount ; prevCount++ ) {
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if ( !freeSmokes ) {
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gameLocal.Printf( "idSmokeParticles::EmitSmoke: no free smokes with %d active stages\n", activeStages.Num() );
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return true;
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}
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singleSmoke_t *newSmoke = freeSmokes;
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freeSmokes = freeSmokes->next;
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numActiveSmokes++;
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newSmoke->index = prevCount;
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newSmoke->axis = axis;
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newSmoke->origin = origin;
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newSmoke->random = steppingRandom;
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newSmoke->privateStartTime = systemStartTime + prevCount * finalParticleTime / stage->totalParticles;
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newSmoke->next = active->smokes;
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active->smokes = newSmoke;
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steppingRandom.RandomInt(); // advance the random
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}
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}
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return continues;
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}
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/*
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================
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idSmokeParticles::UpdateRenderEntity
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================
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*/
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bool idSmokeParticles::UpdateRenderEntity( renderEntity_s *renderEntity, const renderView_t *renderView ) {
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// FIXME: re-use model surfaces
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renderEntity->hModel->InitEmpty( smokeParticle_SnapshotName );
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// this may be triggered by a model trace or other non-view related source,
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// to which we should look like an empty model
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if ( !renderView ) {
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return false;
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}
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// don't regenerate it if it is current
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if ( renderView->time == currentParticleTime && !renderView->forceUpdate ) {
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return false;
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}
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currentParticleTime = renderView->time;
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particleGen_t g;
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g.renderEnt = renderEntity;
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g.renderView = renderView;
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for ( int activeStageNum = 0; activeStageNum < activeStages.Num(); activeStageNum++ ) {
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singleSmoke_t *smoke, *next, *last;
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activeSmokeStage_t *active = &activeStages[activeStageNum];
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const idParticleStage *stage = active->stage;
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if ( !stage->material ) {
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continue;
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}
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// allocate a srfTriangles that can hold all the particles
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int count = 0;
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for ( smoke = active->smokes; smoke; smoke = smoke->next ) {
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count++;
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}
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int quads = count * stage->NumQuadsPerParticle();
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srfTriangles_t *tri = renderEntity->hModel->AllocSurfaceTriangles( quads * 4, quads * 6 );
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tri->numIndexes = quads * 6;
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tri->numVerts = quads * 4;
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// just always draw the particles
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tri->bounds[0][0] =
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tri->bounds[0][1] =
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tri->bounds[0][2] = -99999;
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tri->bounds[1][0] =
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tri->bounds[1][1] =
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tri->bounds[1][2] = 99999;
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tri->numVerts = 0;
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for ( last = NULL, smoke = active->smokes; smoke; smoke = next ) {
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next = smoke->next;
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g.frac = (float)( gameLocal.time - smoke->privateStartTime ) / ( stage->particleLife * 1000 );
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if ( g.frac >= 1.0f ) {
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// remove the particle from the stage list
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if ( last != NULL ) {
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last->next = smoke->next;
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} else {
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active->smokes = smoke->next;
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}
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// put the particle on the free list
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smoke->next = freeSmokes;
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freeSmokes = smoke;
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numActiveSmokes--;
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continue;
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}
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g.index = smoke->index;
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g.random = smoke->random;
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g.origin = smoke->origin;
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g.axis = smoke->axis;
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g.originalRandom = g.random;
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g.age = g.frac * stage->particleLife;
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tri->numVerts += stage->CreateParticle( &g, tri->verts + tri->numVerts );
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last = smoke;
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}
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if ( tri->numVerts > quads * 4 ) {
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gameLocal.Error( "idSmokeParticles::UpdateRenderEntity: miscounted verts" );
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}
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if ( tri->numVerts == 0 ) {
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// they were all removed
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renderEntity->hModel->FreeSurfaceTriangles( tri );
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if ( !active->smokes ) {
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// remove this from the activeStages list
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activeStages.RemoveIndex( activeStageNum );
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activeStageNum--;
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}
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} else {
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// build the index list
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int indexes = 0;
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for ( int i = 0 ; i < tri->numVerts ; i += 4 ) {
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tri->indexes[indexes+0] = i;
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tri->indexes[indexes+1] = i+2;
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tri->indexes[indexes+2] = i+3;
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tri->indexes[indexes+3] = i;
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tri->indexes[indexes+4] = i+3;
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tri->indexes[indexes+5] = i+1;
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indexes += 6;
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}
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tri->numIndexes = indexes;
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modelSurface_t surf;
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surf.geometry = tri;
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surf.shader = stage->material;
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surf.id = 0;
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renderEntity->hModel->AddSurface( surf );
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}
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}
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return true;
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}
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/*
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================
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idSmokeParticles::ModelCallback
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================
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*/
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bool idSmokeParticles::ModelCallback( renderEntity_s *renderEntity, const renderView_t *renderView ) {
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// update the particles
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if ( gameLocal.smokeParticles ) {
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return gameLocal.smokeParticles->UpdateRenderEntity( renderEntity, renderView );
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}
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return true;
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}
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