Added original SDK code for Alien Swarm.

game/client/convarproxy.cpp

@@ -0,0 +1,105 @@
+//========= Copyright <20> 1996-2008, Valve Corporation, All rights reserved. ============//
+//
+// Material proxy to stuff a convar into a material var.
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "cbase.h"
+// identifier was truncated to '255' characters in the debug information
+//#pragma warning(disable: 4786)
+
+#include "convar.h"
+#include "MaterialSystem/imaterialproxy.h"
+#include "materialsystem/IMaterialVar.h"
+#include "imaterialproxydict.h"
+
+// NOTE: This has to be the last file included!
+#include "tier0/memdbgon.h"
+
+
+class CConVarMaterialProxy: public IMaterialProxy
+{
+public:
+	CConVarMaterialProxy()
+	: m_pResult( NULL ),
+	  m_conVarRef( "", true )
+	{
+	}
+
+	virtual ~CConVarMaterialProxy()
+	{
+	}
+
+	virtual bool Init( IMaterial *pMaterial, KeyValues *pKeyValues )
+	{
+		const char *pResult = pKeyValues->GetString( "resultVar" );
+		if ( !pResult )
+			return false;
+
+		bool found;
+		m_pResult = pMaterial->FindVar( pResult, &found );
+		if ( !found )
+		{
+			m_pResult = NULL;
+			return false;
+		}
+
+		if ( !Q_stricmp( pResult, "$alpha" ) )
+		{
+			pMaterial->SetMaterialVarFlag( MATERIAL_VAR_ALPHA_MODIFIED_BY_PROXY, true );
+		}
+
+		pResult = pKeyValues->GetString( "convar" );
+		if( !pResult )
+		{
+			return false;
+		}
+
+		m_conVarRef.Init( pResult, false );
+		if ( !m_conVarRef.IsValid() )
+		{
+			return false;
+		}
+
+		return true;
+	}
+
+	virtual void OnBind( void* )
+	{
+		switch( m_pResult->GetType() )
+		{
+		case MATERIAL_VAR_TYPE_VECTOR:
+			{
+				float f = m_conVarRef.GetFloat();
+				Vector4D vec( f, f, f, f );
+				m_pResult->SetVecValue( vec.Base(), m_pResult->VectorSize() );
+			}
+			break;
+
+		case MATERIAL_VAR_TYPE_INT:
+			m_pResult->SetIntValue( m_conVarRef.GetInt() );
+			break;
+
+		case MATERIAL_VAR_TYPE_FLOAT:
+		default:
+			m_pResult->SetFloatValue( m_conVarRef.GetFloat() );
+			break;
+		}
+	}
+
+	virtual IMaterial *GetMaterial()
+	{
+		return m_pResult->GetOwningMaterial();
+	}
+
+	virtual void Release()
+	{
+	}
+
+protected:
+	IMaterialVar *m_pResult;
+	ConVarRef m_conVarRef;
+};
+
+EXPOSE_MATERIAL_PROXY( CConVarMaterialProxy, ConVar );