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219 lines
5.6 KiB
219 lines
5.6 KiB
5 years ago
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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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// $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 "particle_util.h"
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#include "baseparticleentity.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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// ------------------------------------------------------------------------- //
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// Definitions
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// ------------------------------------------------------------------------- //
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#define NUM_MOVIEEXPLOSION_EMITTERS 50
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#define EXPLOSION_EMITTER_LIFETIME 3
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#define EMITTED_PARTICLE_LIFETIME 1
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// ------------------------------------------------------------------------- //
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// Classes
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// ------------------------------------------------------------------------- //
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class MovieExplosionEmitter
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{
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public:
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Vector m_Pos;
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Vector m_Velocity;
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float m_Lifetime;
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TimedEvent m_ParticleSpawn;
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};
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class C_MovieExplosion : public C_BaseParticleEntity, public IPrototypeAppEffect
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{
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public:
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DECLARE_CLASS( C_MovieExplosion, C_BaseParticleEntity );
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DECLARE_CLIENTCLASS();
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C_MovieExplosion();
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~C_MovieExplosion();
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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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// IPrototypeAppEffect.
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public:
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virtual void Start(CParticleMgr *pParticleMgr, IPrototypeArgAccess *pArgs);
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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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public:
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MovieExplosionEmitter m_Emitters[NUM_MOVIEEXPLOSION_EMITTERS];
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float m_EmitterLifetime;
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CParticleMgr *m_pParticleMgr;
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PMaterialHandle m_iFireballMaterial;
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// Setup for temporary usage in SimulateAndRender.
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float m_EmitterAlpha;
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private:
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C_MovieExplosion( const C_MovieExplosion & );
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};
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// Expose to the particle app.
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EXPOSE_PROTOTYPE_EFFECT(MovieExplosion, C_MovieExplosion);
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IMPLEMENT_CLIENTCLASS_DT(C_MovieExplosion, DT_MovieExplosion, MovieExplosion)
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END_RECV_TABLE()
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// ------------------------------------------------------------------------- //
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// C_MovieExplosion
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// ------------------------------------------------------------------------- //
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C_MovieExplosion::C_MovieExplosion()
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{
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m_pParticleMgr = NULL;
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}
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C_MovieExplosion::~C_MovieExplosion()
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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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void C_MovieExplosion::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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}
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void C_MovieExplosion::Start(CParticleMgr *pParticleMgr, IPrototypeArgAccess *pArgs)
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{
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if(!pParticleMgr->AddEffect(&m_ParticleEffect, this))
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return;
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// Setup our emitters.
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for(int iEmitter=0; iEmitter < NUM_MOVIEEXPLOSION_EMITTERS; iEmitter++)
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{
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MovieExplosionEmitter *pEmitter = &m_Emitters[iEmitter];
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pEmitter->m_Velocity = RandomVector(-1, 1) * 200;
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pEmitter->m_Pos = GetAbsOrigin();
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pEmitter->m_Lifetime = 0;
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pEmitter->m_ParticleSpawn.Init(15);
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}
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m_EmitterLifetime = 0;
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// Get our materials.
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m_iFireballMaterial = m_ParticleEffect.FindOrAddMaterial("particle/particle_sphere");
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m_pParticleMgr = pParticleMgr;
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}
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void C_MovieExplosion::Update(float fTimeDelta)
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{
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if(!m_pParticleMgr)
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return;
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m_EmitterLifetime += fTimeDelta;
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if(m_EmitterLifetime > EXPLOSION_EMITTER_LIFETIME)
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return;
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m_EmitterAlpha = (float)sin(m_EmitterLifetime * 3.14159f / EXPLOSION_EMITTER_LIFETIME);
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// Simulate the emitters and have them spit out particles.
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for(int iEmitter=0; iEmitter < NUM_MOVIEEXPLOSION_EMITTERS; iEmitter++)
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{
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MovieExplosionEmitter *pEmitter = &m_Emitters[iEmitter];
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pEmitter->m_Pos = pEmitter->m_Pos + pEmitter->m_Velocity * fTimeDelta;
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pEmitter->m_Velocity = pEmitter->m_Velocity * 0.9;
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float tempDelta = fTimeDelta;
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while(pEmitter->m_ParticleSpawn.NextEvent(tempDelta))
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{
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StandardParticle_t *pParticle =
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(StandardParticle_t*)m_ParticleEffect.AddParticle( sizeof(StandardParticle_t), m_iFireballMaterial);
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if(pParticle)
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{
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pParticle->m_Pos = pEmitter->m_Pos;
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pParticle->m_Velocity = pEmitter->m_Velocity * 0.2f + RandomVector(-20, 20);
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}
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}
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}
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}
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void C_MovieExplosion::RenderParticles( CParticleRenderIterator *pIterator )
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{
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const StandardParticle_t *pParticle = (const StandardParticle_t*)pIterator->GetFirst();
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while ( pParticle )
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{
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// Draw.
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Vector tPos;
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TransformParticle(m_pParticleMgr->GetModelView(), pParticle->m_Pos, tPos);
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float sortKey = tPos.z;
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float lifetimePercent = pParticle->m_Lifetime / EMITTED_PARTICLE_LIFETIME;
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Vector color;
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color.x = sin(lifetimePercent * 3.14159);
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color.y = color.x * 0.5f;
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color.z = 0;
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RenderParticle_ColorSize(
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pIterator->GetParticleDraw(),
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tPos,
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color,
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m_EmitterAlpha * sin(3.14159 * lifetimePercent),
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10);
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pParticle = (const StandardParticle_t*)pIterator->GetNext( sortKey );
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}
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}
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void C_MovieExplosion::SimulateParticles( CParticleSimulateIterator *pIterator )
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{
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StandardParticle_t *pParticle = (StandardParticle_t*)pIterator->GetFirst();
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while ( pParticle )
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{
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// Update its lifetime.
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pParticle->m_Lifetime += pIterator->GetTimeDelta();
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if(pParticle->m_Lifetime > 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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// Move it (this comes after rendering to make it clear that moving the particle here won't change
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// its rendering for this frame since m_TransformedPos has already been set).
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pParticle->m_Pos = pParticle->m_Pos + pParticle->m_Velocity * pIterator->GetTimeDelta();
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}
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pParticle = (StandardParticle_t*)pIterator->GetNext();
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}
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}
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