1 files changed, 91 insertions, 0 deletions
diff --git a/game/client/hl2/c_basehelicopter.cpp b/game/client/hl2/c_basehelicopter.cpp
new file mode 100644
index 0000000..abc3728
--- /dev/null
+++ b/game/client/hl2/c_basehelicopter.cpp
@@ -0,0 +1,91 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#include "cbase.h"
+#include "c_basehelicopter.h"
+#include "proxyentity.h"
+#include "materialsystem/imaterial.h"
+#include "materialsystem/imaterialvar.h"
+#include "KeyValues.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+IMPLEMENT_CLIENTCLASS_DT( C_BaseHelicopter, DT_BaseHelicopter, CBaseHelicopter )
+	RecvPropTime( RECVINFO( m_flStartupTime ) ),
+END_RECV_TABLE()
+
+
+C_BaseHelicopter::C_BaseHelicopter()
+{
+}
+
+
+//-----------------------------------------------------------------------------
+// Chopper blade fade-in time
+//-----------------------------------------------------------------------------
+#define FADE_IN_TIME	2.0f
+
+
+//-----------------------------------------------------------------------------
+// Sets the fade of the blades when the chopper starts up
+//-----------------------------------------------------------------------------
+class CHeliBladeMaterialProxy : public CEntityMaterialProxy
+{
+public:
+	CHeliBladeMaterialProxy() { m_AlphaVar = NULL; }
+	virtual ~CHeliBladeMaterialProxy() {}
+	virtual bool Init( IMaterial *pMaterial, KeyValues *pKeyValues );
+	virtual void OnBind( C_BaseEntity *pEntity );
+	virtual IMaterial *GetMaterial();
+
+private:
+	IMaterialVar *m_AlphaVar;
+	bool m_bFadeOut;
+};
+
+bool CHeliBladeMaterialProxy::Init( IMaterial *pMaterial, KeyValues *pKeyValues )
+{
+	bool foundVar;
+	m_AlphaVar = pMaterial->FindVar( "$alpha", &foundVar, false );
+	m_bFadeOut = pKeyValues->GetInt( "$fadeout", 0 ) != 0;
+	return foundVar;
+}
+
+void CHeliBladeMaterialProxy::OnBind( C_BaseEntity *pEnt )
+{
+	if (!m_AlphaVar)
+		return;
+
+	C_BaseHelicopter *pHeli = dynamic_cast<C_BaseHelicopter*>( pEnt );
+	if ( pHeli )
+	{
+		float dt = gpGlobals->curtime  - pHeli->StartupTime();
+		dt /= FADE_IN_TIME;
+		dt = clamp( dt, 0.0f, 1.0f );
+		if ( m_bFadeOut ) 
+		{
+			dt = 1.0f - dt;
+		}
+
+		m_AlphaVar->SetFloatValue( dt );
+	}
+	else
+	{
+		m_AlphaVar->SetFloatValue( 1.0f );
+	}
+}
+
+IMaterial *CHeliBladeMaterialProxy::GetMaterial()
+{
+	if ( !m_AlphaVar )
+		return NULL;
+
+	return m_AlphaVar->GetOwningMaterial();
+}
+
+EXPOSE_INTERFACE( CHeliBladeMaterialProxy, IMaterialProxy, "HeliBlade" IMATERIAL_PROXY_INTERFACE_VERSION );
+