1 files changed, 73 insertions, 0 deletions
diff --git a/game/client/particles_attractor.cpp b/game/client/particles_attractor.cpp
new file mode 100644
index 0000000..3b52fb5
--- /dev/null
+++ b/game/client/particles_attractor.cpp
@@ -0,0 +1,73 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#include "cbase.h"
+#include "particles_attractor.h"
+
+#include "tier0/memdbgon.h"
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &center - 
+//			"attractor" - 
+// Output : CParticleAttractor
+//-----------------------------------------------------------------------------
+CParticleAttractor *CParticleAttractor::Create( const Vector &center, const char *pDebugName )
+{
+	CParticleAttractor *pSystem = new CParticleAttractor( pDebugName );
+
+	pSystem->SetAttractorOrigin( center );
+
+	return pSystem;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pParticle - 
+//			timeDelta - 
+//-----------------------------------------------------------------------------
+void CParticleAttractor::UpdateVelocity( SimpleParticle *pParticle, float timeDelta )
+{
+	float	speed = VectorNormalize( pParticle->m_vecVelocity );
+	Vector	offset;
+
+	Vector dir = ( m_vecAttractorOrigin - pParticle->m_Pos );
+	VectorNormalize( dir );
+	
+	speed = clamp( (speed+speed*0.2f), 0.f, 1024.f );
+	pParticle->m_vecVelocity += dir * speed;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pParticle - 
+//			timeDelta - 
+// Output : float
+//-----------------------------------------------------------------------------
+float CParticleAttractor::UpdateScale( const SimpleParticle *pParticle )
+{
+	return ( ((float)pParticle->m_uchStartSize) * sin( M_PI * (pParticle->m_flLifetime / pParticle->m_flDieTime) ) );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pParticle - 
+//			timeDelta - 
+// Output : float
+//-----------------------------------------------------------------------------
+float CParticleAttractor::UpdateAlpha( const SimpleParticle *pParticle )
+{
+	return ( ((float)pParticle->m_uchStartAlpha/255.0f) * sin( M_PI * (pParticle->m_flLifetime / pParticle->m_flDieTime) ) );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &origin - 
+//-----------------------------------------------------------------------------
+void CParticleAttractor::SetAttractorOrigin( const Vector &origin )
+{
+	m_vecAttractorOrigin = origin;
+}