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game/client/tf2/ztestmaterialproxy.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "materialsystem/imaterialproxy.h"
+#include "materialsystem/imaterial.h"
+#include "materialsystem/imaterialvar.h"
+
+// $sineVar : name of variable that controls the alpha level (float)
+class CzTestMaterialProxy : public IMaterialProxy
+{
+public:
+	CzTestMaterialProxy();
+	virtual ~CzTestMaterialProxy();
+	virtual bool Init( IMaterial *pMaterial, KeyValues *pKeyValues );
+	virtual void OnBind( void *pC_BaseEntity );
+	virtual void Release( void ) { delete this; }
+private:
+	C_BaseEntity *BindArgToEntity( void *pArg );
+
+	IMaterialVar *m_AlphaVar;
+};
+
+CzTestMaterialProxy::CzTestMaterialProxy()
+{
+	m_AlphaVar = NULL;
+}
+
+CzTestMaterialProxy::~CzTestMaterialProxy()
+{
+}
+
+C_BaseEntity *CzTestMaterialProxy::BindArgToEntity( void *pArg )
+{
+	IClientRenderable *pRend = (IClientRenderable *)pArg;
+	return pRend->GetIClientUnknown()->GetBaseEntity();
+}
+
+bool CzTestMaterialProxy::Init( IMaterial *pMaterial, KeyValues *pKeyValues )
+{
+	bool foundVar;
+	m_AlphaVar = pMaterial->FindVar( "$alpha", &foundVar, false );
+	return foundVar;
+}
+
+void CzTestMaterialProxy::OnBind( void *pC_BaseEntity )
+{
+	C_BaseEntity *pEnt = BindArgToEntity( pC_BaseEntity );
+	if( !pEnt )
+	{
+		return;
+	}
+
+	if (m_AlphaVar)
+	{
+		m_AlphaVar->SetFloatValue( pEnt->m_clrRender.a );
+	}
+
+}
+
+EXPOSE_INTERFACE( CzTestMaterialProxy, IMaterialProxy, "zTest" IMATERIAL_PROXY_INTERFACE_VERSION );