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game/client/tf2/env_objecteffects.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+#include "cbase.h"
+#include "particles_simple.h"
+#include "particlemgr.h"
+#include "particle_collision.h"
+#include "env_objecteffects.h"
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CObjectSmokeParticles::Setup( const Vector &origin, const Vector *direction, float angularSpread, float minSpeed, float maxSpeed, float gravity, float dampen, int flags )
+{
+	// See if we've specified a direction
+	m_ParticleCollision.Setup( origin, direction, angularSpread, minSpeed, maxSpeed, gravity, dampen );
+}
+
+void CObjectSmokeParticles::SimulateParticles( CParticleSimulateIterator *pIterator )
+{
+	float timeDelta = pIterator->GetTimeDelta();
+
+	ObjectSmokeParticle *pParticle = (ObjectSmokeParticle*)pIterator->GetFirst();
+	while ( pParticle )
+	{
+		//Update velocity
+		UpdateVelocity( pParticle, timeDelta );
+		pParticle->m_Pos += (pParticle->m_vecVelocity * timeDelta);
+		pParticle->m_vecVelocity += pParticle->m_vecAcceleration * 2 * timeDelta;
+
+		//Should this particle die?
+		pParticle->m_flLifetime += timeDelta;
+		UpdateRoll( pParticle, timeDelta );
+
+		if ( pParticle->m_flLifetime >= pParticle->m_flDieTime )
+			pIterator->RemoveParticle( pParticle );
+
+		pParticle = (ObjectSmokeParticle*)pIterator->GetNext();
+	}
+}
+
+
+void CObjectSmokeParticles::RenderParticles( CParticleRenderIterator *pIterator )
+{
+	const ObjectSmokeParticle *pParticle = (const ObjectSmokeParticle *)pIterator->GetFirst();
+	while ( pParticle )
+	{
+		//Render
+		Vector	tPos;
+
+		TransformParticle( ParticleMgr()->GetModelView(), pParticle->m_Pos, tPos );
+		float sortKey = (int) tPos.z;
+
+		//Render it
+		RenderParticle_ColorSizeAngle(
+			pIterator->GetParticleDraw(),
+			tPos,
+			UpdateColor( pParticle ),
+			UpdateAlpha( pParticle ) * GetAlphaDistanceFade( tPos, m_flNearClipMin, m_flNearClipMax ),
+			UpdateScale( pParticle ),
+			pParticle->m_flRoll );
+
+		pParticle = (const ObjectSmokeParticle *)pIterator->GetNext( sortKey );
+	}
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CObjectFireParticles::Setup( const Vector &origin, const Vector *direction, float angularSpread, float minSpeed, float maxSpeed, float gravity, float dampen, int flags )
+{
+}
+
+void CObjectFireParticles::SimulateParticles( CParticleSimulateIterator *pIterator )
+{
+	float timeDelta = pIterator->GetTimeDelta();
+
+	ObjectFireParticle *pParticle = (ObjectFireParticle*)pIterator->GetFirst();
+	while ( pParticle )
+	{
+		// Lost our parent?
+		if ( !pParticle->m_hParent )
+		{
+			pIterator->RemoveParticle( pParticle );
+		}
+		else
+		{
+			// Update position to match our parent
+			Vector vecFire;
+			QAngle angFire;
+			if ( pParticle->m_hParent->GetAttachment( pParticle->m_iAttachmentPoint, vecFire, angFire ) )
+			{
+				pParticle->m_Pos = vecFire;
+			}
+
+			// Should this particle die?
+			pParticle->m_flLifetime += timeDelta;
+
+			UpdateRoll( pParticle, timeDelta );
+
+			if ( pParticle->m_flLifetime >= pParticle->m_flDieTime )
+				pIterator->RemoveParticle( pParticle );
+		}
+
+		pParticle = (ObjectFireParticle*)pIterator->GetNext();
+	}
+}
+
+
+void CObjectFireParticles::RenderParticles( CParticleRenderIterator *pIterator )
+{
+	const ObjectFireParticle *pParticle = (const ObjectFireParticle *)pIterator->GetFirst();
+	while ( pParticle )
+	{
+		// Render
+		Vector	tPos;
+		TransformParticle( ParticleMgr()->GetModelView(), pParticle->m_Pos, tPos );
+		float sortKey = (int) tPos.z;
+
+		// Render it
+		RenderParticle_ColorSizeAngle(
+			pIterator->GetParticleDraw(),
+			tPos,
+			UpdateColor( pParticle ),
+			UpdateAlpha( pParticle ) * GetAlphaDistanceFade( tPos, m_flNearClipMin, m_flNearClipMax ),
+			UpdateScale( pParticle ),
+			pParticle->m_flRoll
+			);
+
+		pParticle = (const ObjectFireParticle *)pIterator->GetNext( sortKey );
+	}
+}
+
+