First version of the SOurce SDK 2013

mp/src/game/client/c_movie_explosion.cpp

@@ -0,0 +1,218 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "cbase.h"
+#include "particle_prototype.h"
+#include "particle_util.h"
+#include "baseparticleentity.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+// ------------------------------------------------------------------------- //
+// Definitions
+// ------------------------------------------------------------------------- //
+#define NUM_MOVIEEXPLOSION_EMITTERS	50
+#define EXPLOSION_EMITTER_LIFETIME	3
+#define EMITTED_PARTICLE_LIFETIME	1
+
+
+// ------------------------------------------------------------------------- //
+// Classes
+// ------------------------------------------------------------------------- //
+class MovieExplosionEmitter
+{
+public:
+	Vector		m_Pos;
+	Vector		m_Velocity;
+	float		m_Lifetime;
+	TimedEvent	m_ParticleSpawn;
+};
+
+
+class C_MovieExplosion : public C_BaseParticleEntity, public IPrototypeAppEffect
+{
+public:
+	DECLARE_CLASS( C_MovieExplosion, C_BaseParticleEntity );
+	DECLARE_CLIENTCLASS();
+
+					C_MovieExplosion();
+					~C_MovieExplosion();
+
+// C_BaseEntity.
+public:
+	virtual void	OnDataChanged(DataUpdateType_t updateType);
+
+// IPrototypeAppEffect.
+public:
+	virtual void	Start(CParticleMgr *pParticleMgr, IPrototypeArgAccess *pArgs);
+
+// IParticleEffect.
+public:
+	virtual void	Update(float fTimeDelta);
+	virtual void RenderParticles( CParticleRenderIterator *pIterator );
+	virtual void SimulateParticles( CParticleSimulateIterator *pIterator );
+
+
+public:
+	MovieExplosionEmitter	m_Emitters[NUM_MOVIEEXPLOSION_EMITTERS];
+	float					m_EmitterLifetime;
+
+	CParticleMgr			*m_pParticleMgr;
+	PMaterialHandle			m_iFireballMaterial;
+
+	// Setup for temporary usage in SimulateAndRender.
+	float					m_EmitterAlpha;
+
+private:
+					C_MovieExplosion( const C_MovieExplosion & );
+
+};
+
+// Expose to the particle app.
+EXPOSE_PROTOTYPE_EFFECT(MovieExplosion, C_MovieExplosion);
+
+IMPLEMENT_CLIENTCLASS_DT(C_MovieExplosion, DT_MovieExplosion, MovieExplosion)
+END_RECV_TABLE()
+
+
+
+// ------------------------------------------------------------------------- //
+// C_MovieExplosion
+// ------------------------------------------------------------------------- //
+C_MovieExplosion::C_MovieExplosion()
+{
+	m_pParticleMgr = NULL;
+}
+
+
+C_MovieExplosion::~C_MovieExplosion()
+{
+	if(m_pParticleMgr)
+		m_pParticleMgr->RemoveEffect( &m_ParticleEffect );
+}
+
+
+void C_MovieExplosion::OnDataChanged(DataUpdateType_t updateType)
+{
+	C_BaseEntity::OnDataChanged(updateType);
+
+	if(updateType == DATA_UPDATE_CREATED)
+	{
+		Start( ParticleMgr(), NULL );
+	}
+}
+
+
+void C_MovieExplosion::Start(CParticleMgr *pParticleMgr, IPrototypeArgAccess *pArgs)
+{
+	if(!pParticleMgr->AddEffect(&m_ParticleEffect, this))
+		return;
+
+	// Setup our emitters.
+	for(int iEmitter=0; iEmitter < NUM_MOVIEEXPLOSION_EMITTERS; iEmitter++)
+	{
+		MovieExplosionEmitter *pEmitter = &m_Emitters[iEmitter];
+		pEmitter->m_Velocity = RandomVector(-1, 1) * 200;
+
+		pEmitter->m_Pos = GetAbsOrigin();
+			
+		pEmitter->m_Lifetime = 0;
+		pEmitter->m_ParticleSpawn.Init(15);
+	}
+	m_EmitterLifetime = 0;
+
+	// Get our materials.
+	m_iFireballMaterial = m_ParticleEffect.FindOrAddMaterial("particle/particle_sphere");
+
+	m_pParticleMgr = pParticleMgr;
+}
+
+
+void C_MovieExplosion::Update(float fTimeDelta)
+{
+	if(!m_pParticleMgr)
+		return;
+
+	m_EmitterLifetime += fTimeDelta;
+	if(m_EmitterLifetime > EXPLOSION_EMITTER_LIFETIME)
+		return;
+
+	m_EmitterAlpha = (float)sin(m_EmitterLifetime * 3.14159f / EXPLOSION_EMITTER_LIFETIME);
+
+	// Simulate the emitters and have them spit out particles.
+	for(int iEmitter=0; iEmitter < NUM_MOVIEEXPLOSION_EMITTERS; iEmitter++)
+	{
+		MovieExplosionEmitter *pEmitter = &m_Emitters[iEmitter];
+
+		pEmitter->m_Pos = pEmitter->m_Pos + pEmitter->m_Velocity * fTimeDelta;
+		pEmitter->m_Velocity = pEmitter->m_Velocity * 0.9;
+
+		float tempDelta = fTimeDelta;
+		while(pEmitter->m_ParticleSpawn.NextEvent(tempDelta))
+		{
+			StandardParticle_t *pParticle = 
+				(StandardParticle_t*)m_ParticleEffect.AddParticle( sizeof(StandardParticle_t), m_iFireballMaterial);
+
+			if(pParticle)
+			{
+				pParticle->m_Pos = pEmitter->m_Pos;
+				pParticle->m_Velocity = pEmitter->m_Velocity * 0.2f + RandomVector(-20, 20);
+			}
+		}
+	}
+}
+
+
+void C_MovieExplosion::RenderParticles( CParticleRenderIterator *pIterator )
+{
+	const StandardParticle_t *pParticle = (const StandardParticle_t*)pIterator->GetFirst();
+	while ( pParticle )
+	{
+		// Draw.
+		Vector tPos;
+		TransformParticle(m_pParticleMgr->GetModelView(), pParticle->m_Pos, tPos);
+		float sortKey = tPos.z;
+
+		float lifetimePercent = pParticle->m_Lifetime / EMITTED_PARTICLE_LIFETIME;
+		Vector color;
+		color.x = sin(lifetimePercent * 3.14159);
+		color.y = color.x * 0.5f;
+		color.z = 0;
+		RenderParticle_ColorSize(
+			pIterator->GetParticleDraw(),
+			tPos,
+			color,
+			m_EmitterAlpha * sin(3.14159 * lifetimePercent),
+			10);
+
+		pParticle = (const StandardParticle_t*)pIterator->GetNext( sortKey );
+	}
+}
+
+void C_MovieExplosion::SimulateParticles( CParticleSimulateIterator *pIterator )
+{
+	StandardParticle_t *pParticle = (StandardParticle_t*)pIterator->GetFirst();
+	while ( pParticle )
+	{
+		// Update its lifetime.
+		pParticle->m_Lifetime += pIterator->GetTimeDelta();
+		if(pParticle->m_Lifetime > 1)
+		{
+			pIterator->RemoveParticle( pParticle );
+		}
+		else
+		{		
+			// Move it (this comes after rendering to make it clear that moving the particle here won't change
+			// its rendering for this frame since m_TransformedPos has already been set).
+			pParticle->m_Pos = pParticle->m_Pos + pParticle->m_Velocity * pIterator->GetTimeDelta();
+		}
+		
+		pParticle = (StandardParticle_t*)pIterator->GetNext();
+	}
+}
+