1HEADmaster

1 files changed, 108 insertions, 0 deletions

diff --git a/game/client/c_impact_effects.h b/game/client/c_impact_effects.h
new file mode 100644
index 0000000..aaeddbe
--- /dev/null
+++ b/game/client/c_impact_effects.h
@@ -0,0 +1,108 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#ifndef C_IMPACT_EFFECTS_H
+#define C_IMPACT_EFFECTS_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier0/memdbgon.h"
+
+//-----------------------------------------------------------------------------
+// Purpose: DustParticle emitter 
+//-----------------------------------------------------------------------------
+class CDustParticle : public CSimpleEmitter
+{
+public:
+	
+	CDustParticle( const char *pDebugName ) : CSimpleEmitter( pDebugName ) {}
+	
+	//Create
+	static CDustParticle *Create( const char *pDebugName="dust" )
+	{
+		return new CDustParticle( pDebugName );
+	}
+
+	//Roll
+	virtual	float UpdateRoll( SimpleParticle *pParticle, float timeDelta )
+	{
+		pParticle->m_flRoll += pParticle->m_flRollDelta * timeDelta;
+		
+		pParticle->m_flRollDelta += pParticle->m_flRollDelta * ( timeDelta * -8.0f );
+
+#ifdef _XBOX
+		//Cap the minimum roll
+		if ( fabs( pParticle->m_flRollDelta ) < 0.1f )
+		{
+			pParticle->m_flRollDelta = ( pParticle->m_flRollDelta > 0.0f ) ? 0.1f : -0.1f;
+		}
+#else
+		if ( fabs( pParticle->m_flRollDelta ) < 0.5f )
+		{
+			pParticle->m_flRollDelta = ( pParticle->m_flRollDelta > 0.0f ) ? 0.5f : -0.5f;
+		}
+#endif // _XBOX
+
+		return pParticle->m_flRoll;
+	}
+
+	//Velocity
+	virtual void UpdateVelocity( SimpleParticle *pParticle, float timeDelta )
+	{
+		Vector	saveVelocity = pParticle->m_vecVelocity;
+
+		//Decellerate
+		static float dtime;
+		static float decay;
+
+		if ( dtime != timeDelta )
+		{
+			dtime = timeDelta;
+			float expected = 0.5;
+			decay = exp( log( 0.0001f ) * dtime / expected );
+		}
+
+		pParticle->m_vecVelocity = pParticle->m_vecVelocity * decay;
+
+#ifdef _XBOX
+		//Cap the minimum speed
+		if ( pParticle->m_vecVelocity.LengthSqr() < (8.0f*8.0f) )
+		{
+			VectorNormalize( saveVelocity );
+			pParticle->m_vecVelocity = saveVelocity * 8.0f;
+		}
+#else
+		if ( pParticle->m_vecVelocity.LengthSqr() < (32.0f*32.0f) )
+		{
+			VectorNormalize( saveVelocity );
+			pParticle->m_vecVelocity = saveVelocity * 32.0f;
+		}
+#endif // _XBOX
+	}
+
+	//Alpha
+	virtual float UpdateAlpha( const SimpleParticle *pParticle )
+	{
+		float	tLifetime = pParticle->m_flLifetime / pParticle->m_flDieTime;
+		float	ramp = 1.0f - tLifetime;
+
+		//Non-linear fade
+		if ( ramp < 0.75f )
+			ramp *= ramp;
+
+		return ramp;
+	}
+
+private:
+	CDustParticle( const CDustParticle & ); // not defined, not accessible
+};
+
+void GetColorForSurface( trace_t *trace, Vector *color );
+
+#include "tier0/memdbgoff.h"
+
+#endif // C_IMPACT_EFFECTS_H