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Gigaslav
239
game/client/fx_fleck.cpp
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239
game/client/fx_fleck.cpp
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//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $Workfile: $
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// $NoKeywords: $
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//=============================================================================//
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#include "cbase.h"
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#include "fx_fleck.h"
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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// enable this to have the fleck_merge cvar as well as the current system count displayed as it changes (for profiling)
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#define REPORT_MERGED_FLECKS 0
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//
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// class PARTICLE_MERGE
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//{
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//public:
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// bool MergeParticleSystems( CFleckParticles *pSystem, const char *pEffectName, const Vector ¢er, const Vector &extents )
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// { merge; return true; }
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//};
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// a singly linked list through all particle effects of a specific type
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// with a specific rule for sharing them.
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// Needs a hook to the particle effect's constructor/destructor and factory method
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// The factory needs to support optionally merging the new particles into a previously built particle effect
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// this cuts down on lots of scene management overhead as well as rendering/batch overhead
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template< class PARTICLE_EFFECT, class PARTICLE_MERGE >
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class CParticleMergeList
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{
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public:
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CParticleMergeList() : m_pHead(NULL) {}
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void AddParticleSystem( PARTICLE_EFFECT *pSystem );
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void RemoveParticleSystem( PARTICLE_EFFECT *pRemove );
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PARTICLE_EFFECT *FindAndMergeParticleSystem( const char *pEffectName, const Vector ¢er, const Vector &extents );
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bool MergeParticleSystems( PARTICLE_EFFECT *pSystem, const char *pEffectName, const Vector ¢er, const Vector &extents );
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private:
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PARTICLE_EFFECT *m_pHead;
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PARTICLE_MERGE m_merge;
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};
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#if REPORT_MERGED_FLECKS
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ConVar fleck_merge("fleck_merge","1");
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int g_PCount = 0;
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#endif
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template< class PARTICLE_EFFECT, class PARTICLE_MERGE >
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void CParticleMergeList<PARTICLE_EFFECT,PARTICLE_MERGE>::AddParticleSystem( PARTICLE_EFFECT *pSystem )
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{
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#if REPORT_MERGED_FLECKS
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g_PCount++;
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Msg("PS: %d\n", g_PCount);
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#endif
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pSystem->m_pNextParticleSystem = m_pHead;
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m_pHead = pSystem;
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}
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template< class PARTICLE_EFFECT, class PARTICLE_MERGE >
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void CParticleMergeList<PARTICLE_EFFECT,PARTICLE_MERGE>::RemoveParticleSystem( PARTICLE_EFFECT *pRemove )
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{
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#if REPORT_MERGED_FLECKS
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g_PCount--;
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Msg("PS: %d\n", g_PCount);
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#endif
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PARTICLE_EFFECT **pPrev = &m_pHead;
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PARTICLE_EFFECT *pCur = *pPrev;
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while ( pCur )
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{
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if ( pCur == pRemove )
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{
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*pPrev = pCur->m_pNextParticleSystem;
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return;
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}
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pPrev = &pCur->m_pNextParticleSystem;
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pCur = *pPrev;
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}
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}
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template< class PARTICLE_EFFECT, class PARTICLE_MERGE >
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PARTICLE_EFFECT *CParticleMergeList<PARTICLE_EFFECT,PARTICLE_MERGE>::FindAndMergeParticleSystem( const char *pEffectName, const Vector ¢er, const Vector &extents )
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{
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#if REPORT_MERGED_FLECKS
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if ( !fleck_merge.GetBool() )
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return NULL;
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#endif
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for ( PARTICLE_EFFECT *pMerge = m_pHead; pMerge != NULL; pMerge = pMerge->m_pNextParticleSystem )
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{
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if ( m_merge.MergeParticleSystems( pMerge, pEffectName, center, extents ) )
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return pMerge;
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}
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return NULL;
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}
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// merge anything within 10 feet
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const float MAX_RADIUS_BBOX_MERGE = 120.0f;
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template< class PARTICLE_EFFECT >
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class CMergeSameNameBbox
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{
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public:
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bool MergeParticleSystems( PARTICLE_EFFECT *pSystem, const char *pEffectName, const Vector ¢er, const Vector &extents )
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{
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// by default, match names
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if ( !Q_stricmp(pSystem->GetEffectName(), pEffectName) )
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{
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Vector mins, maxs;
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pSystem->GetBinding().GetWorldspaceBounds( &mins, &maxs );
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AddPointToBounds( center - extents, mins, maxs );
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AddPointToBounds( center + extents, mins, maxs );
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Vector size = maxs - mins;
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float radius = size.Length();
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if ( radius < MAX_RADIUS_BBOX_MERGE )
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{
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pSystem->GetBinding().SetBBox( mins, maxs );
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// put sort origin at center of the new box
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Vector sortOrigin = 0.5f * (mins+maxs);
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pSystem->SetSortOrigin(sortOrigin);
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return true;
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}
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}
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return false;
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}
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};
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CParticleMergeList< CFleckParticles, CMergeSameNameBbox<CFleckParticles> > g_FleckMergeList;
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//
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// CFleckParticles
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//
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CSmartPtr<CFleckParticles> CFleckParticles::Create( const char *pDebugName, const Vector &vCenter, const Vector &extents )
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{
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CFleckParticles *pMerge = g_FleckMergeList.FindAndMergeParticleSystem( pDebugName, vCenter, extents );
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if ( pMerge )
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return pMerge;
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CFleckParticles *pRet = new CFleckParticles( pDebugName );
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if ( pRet )
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{
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pRet->GetBinding().SetBBox( vCenter - extents, vCenter + extents );
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pRet->SetSortOrigin(vCenter);
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}
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return pRet;
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}
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CFleckParticles::CFleckParticles( const char *pDebugName ) : CSimpleEmitter( pDebugName ), m_pNextParticleSystem(NULL)
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{
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g_FleckMergeList.AddParticleSystem(this);
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}
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CFleckParticles::~CFleckParticles()
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{
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g_FleckMergeList.RemoveParticleSystem(this);
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}
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//-----------------------------------------------------------------------------
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// Purpose: Test for surrounding collision surfaces for quick collision testing for the particle system
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// Input : &origin - starting position
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// *dir - direction of movement (if NULL, will do a point emission test in four directions)
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// angularSpread - looseness of the spread
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// minSpeed - minimum speed
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// maxSpeed - maximum speed
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// gravity - particle gravity for the sytem
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// dampen - dampening amount on collisions
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// flags - extra information
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//-----------------------------------------------------------------------------
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void CFleckParticles::Setup( const Vector &origin, const Vector *direction, float angularSpread, float minSpeed, float maxSpeed, float gravity, float dampen, int flags )
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{
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//See if we've specified a direction
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m_ParticleCollision.Setup( origin, direction, angularSpread, minSpeed, maxSpeed, gravity, dampen );
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}
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void CFleckParticles::RenderParticles( CParticleRenderIterator *pIterator )
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{
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const FleckParticle *pParticle = (const FleckParticle*)pIterator->GetFirst();
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while ( pParticle )
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{
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Vector tPos;
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TransformParticle( ParticleMgr()->GetModelView(), pParticle->m_Pos, tPos );
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float sortKey = (int) tPos.z;
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Vector color;
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color[0] = pParticle->m_uchColor[0] / 255.0f;
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color[1] = pParticle->m_uchColor[1] / 255.0f;
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color[2] = pParticle->m_uchColor[2] / 255.0f;
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//Render it
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RenderParticle_ColorSizeAngle(
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pIterator->GetParticleDraw(),
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tPos,
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color,
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1.0f - (pParticle->m_flLifetime / pParticle->m_flDieTime),
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pParticle->m_uchSize,
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pParticle->m_flRoll );
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pParticle = (const FleckParticle*)pIterator->GetNext( sortKey );
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}
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}
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void CFleckParticles::SimulateParticles( CParticleSimulateIterator *pIterator )
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{
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FleckParticle *pParticle = (FleckParticle*)pIterator->GetFirst();
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while ( pParticle )
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{
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const float timeDelta = pIterator->GetTimeDelta();
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//Should this particle die?
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pParticle->m_flLifetime += timeDelta;
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if ( pParticle->m_flLifetime >= pParticle->m_flDieTime )
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{
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pIterator->RemoveParticle( pParticle );
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}
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else
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{
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pParticle->m_flRoll += pParticle->m_flRollDelta * timeDelta;
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//Simulate the movement with collision
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trace_t trace;
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m_ParticleCollision.MoveParticle( pParticle->m_Pos, pParticle->m_vecVelocity, &pParticle->m_flRollDelta, timeDelta, &trace );
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// If we're in solid, then stop moving
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if ( trace.allsolid )
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{
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pParticle->m_vecVelocity = vec3_origin;
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pParticle->m_flRollDelta = 0.0f;
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}
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}
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pParticle = (FleckParticle*)pIterator->GetNext();
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}
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}
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