504 lines
13 KiB
C++
504 lines
13 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: Implements a particle system steam jet.
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//
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// $NoKeywords: $
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//=============================================================================//
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#include "cbase.h"
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#include "particle_prototype.h"
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#include "baseparticleentity.h"
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#include "particles_simple.h"
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#include "filesystem.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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#ifdef HL2_EPISODIC
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#define SMOKESTACK_MAX_MATERIALS 8
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#else
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#define SMOKESTACK_MAX_MATERIALS 1
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#endif
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//==================================================
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// C_SmokeStack
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//==================================================
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class C_SmokeStack : public C_BaseParticleEntity, public IPrototypeAppEffect
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{
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public:
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DECLARE_CLIENTCLASS();
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DECLARE_CLASS( C_SmokeStack, C_BaseParticleEntity );
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C_SmokeStack();
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~C_SmokeStack();
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class SmokeStackParticle : public Particle
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{
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public:
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Vector m_Velocity;
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Vector m_vAccel;
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float m_Lifetime;
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float m_flAngle;
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float m_flRollDelta;
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float m_flSortPos;
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};
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//C_BaseEntity
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public:
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virtual void OnDataChanged( DataUpdateType_t updateType );
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virtual void ClientThink();
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//IPrototypeAppEffect
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public:
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virtual void Start(CParticleMgr *pParticleMgr, IPrototypeArgAccess *pArgs);
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virtual bool GetPropEditInfo(RecvTable **ppTable, void **ppObj);
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//IParticleEffect
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public:
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virtual void Update(float fTimeDelta);
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virtual void RenderParticles( CParticleRenderIterator *pIterator );
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virtual void SimulateParticles( CParticleSimulateIterator *pIterator );
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virtual void StartRender( VMatrix &effectMatrix );
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private:
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void QueueLightParametersInRenderer();
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//Stuff from the datatable
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public:
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CParticleSphereRenderer m_Renderer;
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float m_SpreadSpeed;
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float m_Speed;
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float m_StartSize;
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float m_EndSize;
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float m_Rate;
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float m_JetLength; // Length of the jet. Lifetime is derived from this.
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int m_bEmit; // Emit particles?
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float m_flBaseSpread;
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class CLightInfo
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{
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public:
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Vector m_vPos;
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Vector m_vColor;
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float m_flIntensity;
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};
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// Note: there are two ways the directional light can be specified. The default is to use
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// DirLightColor and a default dirlight source (from above or below).
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// In this case, m_DirLight.m_vPos and m_DirLight.m_flIntensity are ignored.
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//
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// The other is to attach a directional env_particlelight to us.
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// In this case, m_DirLightSource is ignored and all the m_DirLight parameters are used.
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CParticleLightInfo m_AmbientLight;
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CParticleLightInfo m_DirLight;
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Vector m_vBaseColor;
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Vector m_vWind;
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float m_flTwist;
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int m_iMaterialModel;
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private:
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C_SmokeStack( const C_SmokeStack & );
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float m_TwistMat[2][2];
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int m_bTwist;
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float m_flAlphaScale;
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float m_InvLifetime; // Calculated from m_JetLength / m_Speed;
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CParticleMgr *m_pParticleMgr;
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PMaterialHandle m_MaterialHandle[SMOKESTACK_MAX_MATERIALS];
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TimedEvent m_ParticleSpawn;
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int m_iMaxFrames;
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bool m_bInView;
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float m_flRollSpeed;
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};
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// ------------------------------------------------------------------------- //
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// Tables.
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// ------------------------------------------------------------------------- //
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// Expose to the particle app.
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EXPOSE_PROTOTYPE_EFFECT(SmokeStack, C_SmokeStack);
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IMPLEMENT_CLIENTCLASS_DT(C_SmokeStack, DT_SmokeStack, CSmokeStack)
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RecvPropFloat(RECVINFO(m_SpreadSpeed), 0),
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RecvPropFloat(RECVINFO(m_Speed), 0),
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RecvPropFloat(RECVINFO(m_StartSize), 0),
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RecvPropFloat(RECVINFO(m_EndSize), 0),
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RecvPropFloat(RECVINFO(m_Rate), 0),
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RecvPropFloat(RECVINFO(m_JetLength), 0),
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RecvPropInt(RECVINFO(m_bEmit), 0),
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RecvPropFloat(RECVINFO(m_flBaseSpread)),
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RecvPropFloat(RECVINFO(m_flTwist)),
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RecvPropFloat(RECVINFO(m_flRollSpeed )),
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RecvPropIntWithMinusOneFlag( RECVINFO( m_iMaterialModel ) ),
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RecvPropVector( RECVINFO(m_AmbientLight.m_vPos) ),
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RecvPropVector( RECVINFO(m_AmbientLight.m_vColor) ),
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RecvPropFloat( RECVINFO(m_AmbientLight.m_flIntensity) ),
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RecvPropVector( RECVINFO(m_DirLight.m_vPos) ),
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RecvPropVector( RECVINFO(m_DirLight.m_vColor) ),
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RecvPropFloat( RECVINFO(m_DirLight.m_flIntensity) ),
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RecvPropVector(RECVINFO(m_vWind))
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END_RECV_TABLE()
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// ------------------------------------------------------------------------- //
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// C_SmokeStack implementation.
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// ------------------------------------------------------------------------- //
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C_SmokeStack::C_SmokeStack()
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{
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m_pParticleMgr = NULL;
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m_MaterialHandle[0] = INVALID_MATERIAL_HANDLE;
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m_iMaterialModel = -1;
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m_SpreadSpeed = 15;
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m_Speed = 30;
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m_StartSize = 10;
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m_EndSize = 15;
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m_Rate = 80;
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m_JetLength = 180;
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m_bEmit = true;
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m_flBaseSpread = 20;
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m_bInView = false;
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// Lighting is (base color) + (ambient / dist^2) + bump(directional / dist^2)
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// By default, we use bottom-up lighting for the directional.
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SetRenderColor( 0, 0, 0, 255 );
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m_AmbientLight.m_vPos.Init(0,0,-100);
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m_AmbientLight.m_vColor.Init( 40, 40, 40 );
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m_AmbientLight.m_flIntensity = 8000;
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m_DirLight.m_vColor.Init( 255, 128, 0 );
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m_vWind.Init();
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m_flTwist = 0;
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}
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C_SmokeStack::~C_SmokeStack()
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{
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if(m_pParticleMgr)
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m_pParticleMgr->RemoveEffect( &m_ParticleEffect );
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}
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//-----------------------------------------------------------------------------
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// Purpose: Called after a data update has occured
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// Input : bnewentity -
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//-----------------------------------------------------------------------------
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void C_SmokeStack::OnDataChanged(DataUpdateType_t updateType)
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{
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C_BaseEntity::OnDataChanged(updateType);
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if(updateType == DATA_UPDATE_CREATED)
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{
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Start(ParticleMgr(), NULL);
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}
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// Recalulate lifetime in case length or speed changed.
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m_InvLifetime = m_Speed / m_JetLength;
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}
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static ConVar mat_reduceparticles( "mat_reduceparticles", "0" );
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//-----------------------------------------------------------------------------
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// Purpose: Starts the effect
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// Input : *pParticleMgr -
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// *pArgs -
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//-----------------------------------------------------------------------------
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void C_SmokeStack::Start(CParticleMgr *pParticleMgr, IPrototypeArgAccess *pArgs)
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{
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pParticleMgr->AddEffect( &m_ParticleEffect, this );
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// Figure out the material name.
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char str[512] = "unset_material";
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const model_t *pModel = modelinfo->GetModel( m_iMaterialModel );
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if ( pModel )
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{
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Q_strncpy( str, modelinfo->GetModelName( pModel ), sizeof( str ) );
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// Get rid of the extension because the material system doesn't want it.
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char *pExt = Q_stristr( str, ".vmt" );
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if ( pExt )
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pExt[0] = 0;
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}
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m_MaterialHandle[0] = m_ParticleEffect.FindOrAddMaterial( str );
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#ifdef HL2_EPISODIC
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int iCount = 1;
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char szNames[512];
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int iLength = Q_strlen( str );
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str[iLength-1] = '\0';
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Q_snprintf( szNames, sizeof( szNames ), "%s%d.vmt", str, iCount );
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while ( filesystem->FileExists( VarArgs( "materials/%s", szNames ) ) && iCount < SMOKESTACK_MAX_MATERIALS )
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{
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char *pExt = Q_stristr( szNames, ".vmt" );
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if ( pExt )
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pExt[0] = 0;
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m_MaterialHandle[iCount] = m_ParticleEffect.FindOrAddMaterial( szNames );
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iCount++;
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}
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m_iMaxFrames = iCount-1;
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m_ParticleSpawn.Init( mat_reduceparticles.GetBool() ? m_Rate / 4 : m_Rate ); // Obey mat_reduceparticles in episodic
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#else
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m_ParticleSpawn.Init( m_Rate );
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#endif
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m_InvLifetime = m_Speed / m_JetLength;
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m_pParticleMgr = pParticleMgr;
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// Figure out how we need to draw.
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IMaterial *pMaterial = pParticleMgr->PMaterialToIMaterial( m_MaterialHandle[0] );
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if( pMaterial )
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{
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m_Renderer.Init( pParticleMgr, pMaterial );
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}
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QueueLightParametersInRenderer();
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// For the first N seconds, always simulate so it can build up the smokestack.
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// Afterwards, we set it to freeze when it's not being rendered.
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m_ParticleEffect.SetAlwaysSimulate( true );
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SetNextClientThink( gpGlobals->curtime + 5 );
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}
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void C_SmokeStack::ClientThink()
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{
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m_ParticleEffect.SetAlwaysSimulate( false );
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}
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//-----------------------------------------------------------------------------
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// Purpose:
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// Input : **ppTable -
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// **ppObj -
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// Output : Returns true on success, false on failure.
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//-----------------------------------------------------------------------------
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bool C_SmokeStack::GetPropEditInfo( RecvTable **ppTable, void **ppObj )
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{
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*ppTable = &REFERENCE_RECV_TABLE(DT_SmokeStack);
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*ppObj = this;
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return true;
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}
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//-----------------------------------------------------------------------------
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// Purpose:
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// Input : fTimeDelta -
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//-----------------------------------------------------------------------------
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void C_SmokeStack::Update(float fTimeDelta)
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{
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if( !m_pParticleMgr )
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{
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assert(false);
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return;
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}
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// Don't spawn particles unless we're visible.
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if( m_bEmit && (m_ParticleEffect.WasDrawnPrevFrame() || m_ParticleEffect.GetAlwaysSimulate()) )
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{
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// Add new particles.
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Vector forward, right, up;
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AngleVectors(GetAbsAngles(), &forward, &right, &up);
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float tempDelta = fTimeDelta;
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while(m_ParticleSpawn.NextEvent(tempDelta))
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{
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int iRandomFrame = random->RandomInt( 0, m_iMaxFrames );
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#ifndef HL2_EPISODIC
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iRandomFrame = 0;
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#endif
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// Make a new particle.
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if(SmokeStackParticle *pParticle = (SmokeStackParticle*)m_ParticleEffect.AddParticle(sizeof(SmokeStackParticle), m_MaterialHandle[iRandomFrame]))
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{
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float angle = FRand( 0, 2.0f*M_PI_F );
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pParticle->m_Pos = GetAbsOrigin() +
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right * (cos( angle ) * m_flBaseSpread) +
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forward * (sin( angle ) * m_flBaseSpread);
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pParticle->m_Velocity =
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FRand(-m_SpreadSpeed,m_SpreadSpeed) * right +
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FRand(-m_SpreadSpeed,m_SpreadSpeed) * forward +
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m_Speed * up;
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pParticle->m_vAccel = m_vWind;
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pParticle->m_Lifetime = 0;
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pParticle->m_flAngle = 0.0f;
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#ifdef HL2_EPISODIC
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pParticle->m_flAngle = RandomFloat( 0, 360 );
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#endif
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pParticle->m_flRollDelta = random->RandomFloat( -m_flRollSpeed, m_flRollSpeed );
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pParticle->m_flSortPos = pParticle->m_Pos.z;
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}
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}
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}
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// Setup the twist matrix.
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float flTwist = (m_flTwist * (M_PI_F * 2.f) / 360.0f) * Helper_GetFrameTime();
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if( ( m_bTwist = !!flTwist ) )
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{
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m_TwistMat[0][0] = cos(flTwist);
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m_TwistMat[0][1] = sin(flTwist);
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m_TwistMat[1][0] = -sin(flTwist);
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m_TwistMat[1][1] = cos(flTwist);
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}
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QueueLightParametersInRenderer();
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}
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void C_SmokeStack::StartRender( VMatrix &effectMatrix )
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{
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m_Renderer.StartRender( effectMatrix );
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}
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void C_SmokeStack::QueueLightParametersInRenderer()
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{
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m_Renderer.SetBaseColor( Vector( m_clrRender->r / 255.0f, m_clrRender->g / 255.0f, m_clrRender->b / 255.0f ) );
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m_Renderer.SetAmbientLight( m_AmbientLight );
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m_Renderer.SetDirectionalLight( m_DirLight );
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m_flAlphaScale = (float)m_clrRender->a;
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}
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void C_SmokeStack::RenderParticles( CParticleRenderIterator *pIterator )
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{
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const SmokeStackParticle *pParticle = (const SmokeStackParticle*)pIterator->GetFirst();
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while ( pParticle )
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{
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// Transform.
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Vector tPos;
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TransformParticle( m_pParticleMgr->GetModelView(), pParticle->m_Pos, tPos );
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// Figure out its alpha. Squaring it after it gets halfway through its lifetime
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// makes it get translucent and fade out for a longer time.
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//float alpha = cosf( -M_PI_F + tLifetime * M_PI_F * 2.f ) * 0.5f + 0.5f;
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float tLifetime = pParticle->m_Lifetime * m_InvLifetime;
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float alpha = TableCos( -M_PI_F + tLifetime * M_PI_F * 2.f ) * 0.5f + 0.5f;
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if( tLifetime > 0.5f )
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alpha *= alpha;
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m_Renderer.RenderParticle(
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pIterator->GetParticleDraw(),
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pParticle->m_Pos,
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tPos,
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alpha * m_flAlphaScale,
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FLerp(m_StartSize, m_EndSize, tLifetime),
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DEG2RAD( pParticle->m_flAngle )
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);
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pParticle = (const SmokeStackParticle*)pIterator->GetNext( pParticle->m_flSortPos );
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}
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}
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void C_SmokeStack::SimulateParticles( CParticleSimulateIterator *pIterator )
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{
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bool bSortNow = true; // Change this to false if we see sorting issues.
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bool bQuickTest = false;
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bool bDrawn = m_ParticleEffect.WasDrawnPrevFrame();
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if ( bDrawn == true && m_bInView == false )
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{
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bSortNow = true;
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}
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if ( bDrawn == false && m_bInView == true )
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{
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bQuickTest = true;
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}
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#ifndef HL2_EPISODIC
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bQuickTest = false;
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bSortNow = true;
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#endif
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if( bQuickTest == false && m_bEmit && (!m_ParticleEffect.WasDrawnPrevFrame() && !m_ParticleEffect.GetAlwaysSimulate()) )
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return;
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SmokeStackParticle *pParticle = (SmokeStackParticle*)pIterator->GetFirst();
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while ( pParticle )
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{
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// Should this particle die?
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pParticle->m_Lifetime += pIterator->GetTimeDelta();
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float tLifetime = pParticle->m_Lifetime * m_InvLifetime;
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if( tLifetime >= 1 )
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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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// Transform.
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if( m_bTwist )
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{
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Vector vTwist(
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pParticle->m_Pos.x - GetAbsOrigin().x,
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pParticle->m_Pos.y - GetAbsOrigin().y,
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0);
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pParticle->m_Pos.x = vTwist.x * m_TwistMat[0][0] + vTwist.y * m_TwistMat[0][1] + GetAbsOrigin().x;
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pParticle->m_Pos.y = vTwist.x * m_TwistMat[1][0] + vTwist.y * m_TwistMat[1][1] + GetAbsOrigin().y;
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}
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#ifndef HL2_EPISODIC
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pParticle->m_Pos = pParticle->m_Pos +
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pParticle->m_Velocity * pIterator->GetTimeDelta() +
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pParticle->m_vAccel * (0.5f * pIterator->GetTimeDelta() * pIterator->GetTimeDelta());
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pParticle->m_Velocity += pParticle->m_vAccel * pIterator->GetTimeDelta();
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#else
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pParticle->m_Pos = pParticle->m_Pos + pParticle->m_Velocity * pIterator->GetTimeDelta() + pParticle->m_vAccel * pIterator->GetTimeDelta();
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#endif
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pParticle->m_flAngle += pParticle->m_flRollDelta * pIterator->GetTimeDelta();
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if ( bSortNow == true )
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{
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Vector tPos;
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TransformParticle( m_pParticleMgr->GetModelView(), pParticle->m_Pos, tPos );
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pParticle->m_flSortPos = tPos.z;
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}
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}
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pParticle = (SmokeStackParticle*)pIterator->GetNext();
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}
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m_bInView = bDrawn;
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}
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