Added original SDK code for Alien Swarm.

game/client/WaterLODMaterialProxy.cpp

@@ -0,0 +1,75 @@
+//========= Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "materialsystem/IMaterialProxy.h"
+#include "materialsystem/IMaterial.h"
+#include "materialsystem/IMaterialVar.h"
+#include "iviewrender.h"
+
+#include "imaterialproxydict.h"
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+// no inputs, assumes that the results go into $CHEAPWATERSTARTDISTANCE and $CHEAPWATERENDDISTANCE
+class CWaterLODMaterialProxy : public IMaterialProxy
+{
+public:
+	CWaterLODMaterialProxy();
+	virtual ~CWaterLODMaterialProxy();
+	virtual bool Init( IMaterial *pMaterial, KeyValues *pKeyValues );
+	virtual void OnBind( void *pC_BaseEntity );
+	virtual void Release( void ) { delete this; }
+	virtual IMaterial *GetMaterial();
+
+private:
+	IMaterialVar *m_pCheapWaterStartDistanceVar;
+	IMaterialVar *m_pCheapWaterEndDistanceVar;
+};
+
+CWaterLODMaterialProxy::CWaterLODMaterialProxy()
+{
+	m_pCheapWaterStartDistanceVar = NULL;
+	m_pCheapWaterEndDistanceVar = NULL;
+}
+
+CWaterLODMaterialProxy::~CWaterLODMaterialProxy()
+{
+}
+
+
+bool CWaterLODMaterialProxy::Init( IMaterial *pMaterial, KeyValues *pKeyValues )
+{
+	bool foundVar;
+	m_pCheapWaterStartDistanceVar = pMaterial->FindVar( "$CHEAPWATERSTARTDISTANCE", &foundVar, false );
+	if( !foundVar )
+		return false;
+
+	m_pCheapWaterEndDistanceVar = pMaterial->FindVar( "$CHEAPWATERENDDISTANCE", &foundVar, false );
+	if( !foundVar )
+		return false;
+
+	return true;
+}
+
+void CWaterLODMaterialProxy::OnBind( void *pC_BaseEntity )
+{
+	if( !m_pCheapWaterStartDistanceVar || !m_pCheapWaterEndDistanceVar )
+	{
+		return;
+	}
+	float start, end;
+	view->GetWaterLODParams( start, end );
+	m_pCheapWaterStartDistanceVar->SetFloatValue( start );
+	m_pCheapWaterEndDistanceVar->SetFloatValue( end );
+}
+
+IMaterial *CWaterLODMaterialProxy::GetMaterial()
+{
+	return m_pCheapWaterStartDistanceVar->GetOwningMaterial();
+}
+
+EXPOSE_MATERIAL_PROXY( CWaterLODMaterialProxy, WaterLOD );