1

game/client/hl2/shieldproxy.cpp

@@ -0,0 +1,110 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+#include "cbase.h"
+#include "proxyentity.h"
+#include "materialsystem/imaterial.h"
+#include "materialsystem/imaterialvar.h"
+#include "materialsystem/imaterialsystem.h"
+#include <KeyValues.h>
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+// $sineVar : name of variable that controls the alpha level (float)
+class CShieldProxy : public CEntityMaterialProxy
+{
+public:
+	CShieldProxy();
+	virtual ~CShieldProxy();
+	virtual bool Init( IMaterial *pMaterial, KeyValues *pKeyValues );
+	virtual void OnBind( C_BaseEntity *pC_BaseEntity );
+	virtual IMaterial *GetMaterial();
+
+private:
+	IMaterialVar *m_AlphaVar;
+	IMaterialVar *m_pTextureScrollVar;
+	float m_ScrollRate;
+	float m_ScrollAngle;
+};
+
+CShieldProxy::CShieldProxy()
+{
+	m_AlphaVar				= NULL;
+	m_pTextureScrollVar		= NULL;
+	m_ScrollRate = 0;
+	m_ScrollAngle = 0;
+}
+
+CShieldProxy::~CShieldProxy()
+{
+}
+
+
+bool CShieldProxy::Init( IMaterial *pMaterial, KeyValues *pKeyValues )
+{
+	bool foundVar;
+
+	m_AlphaVar = pMaterial->FindVar( "$translucency", &foundVar, false );
+	if( !foundVar )
+		return false;
+
+	char const* pScrollVarName = pKeyValues->GetString( "textureScrollVar" );
+	if (!pScrollVarName)
+		return false;
+
+	m_pTextureScrollVar = pMaterial->FindVar( pScrollVarName, &foundVar, false );
+	if( !foundVar )
+		return false;
+
+	m_ScrollRate = pKeyValues->GetFloat( "textureScrollRate", 1 );
+	m_ScrollAngle = pKeyValues->GetFloat( "textureScrollAngle", 0 );
+	return true;
+}
+
+void CShieldProxy::OnBind( C_BaseEntity *pEnt )
+{
+	if (m_AlphaVar)
+	{
+		m_AlphaVar->SetFloatValue( pEnt->m_clrRender->a );
+	}
+
+	if( !m_pTextureScrollVar )
+	{
+		return;
+	}
+	
+	float sOffset, tOffset;
+	
+	sOffset = gpGlobals->curtime * sin( m_ScrollAngle * ( M_PI / 180.0f ) ) * m_ScrollRate;
+	tOffset = gpGlobals->curtime * cos( m_ScrollAngle * ( M_PI / 180.0f ) ) * m_ScrollRate;
+
+	// make sure that we are positive
+	if( sOffset < 0.0f )
+	{
+		sOffset += 1.0f + -( int )sOffset;
+	}
+	if( tOffset < 0.0f )
+	{
+		tOffset += 1.0f + -( int )tOffset;
+	}
+	
+	// make sure that we are in a [0,1] range
+	sOffset = sOffset - ( int )sOffset;
+	tOffset = tOffset - ( int )tOffset;
+	
+	m_pTextureScrollVar->SetVecValue( sOffset, tOffset, 0.0f );
+}
+
+IMaterial *CShieldProxy::GetMaterial()
+{
+	if ( !m_AlphaVar )
+		return NULL;
+
+	return m_AlphaVar->GetOwningMaterial();
+}
+
+EXPOSE_INTERFACE( CShieldProxy, IMaterialProxy, "Shield" IMATERIAL_PROXY_INTERFACE_VERSION );