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game/client/c_func_conveyor.cpp

@@ -0,0 +1,158 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//===========================================================================//
+
+#include "cbase.h"
+#include "materialsystem/imaterialproxy.h"
+#include "materialsystem/imaterial.h"
+#include "materialsystem/imaterialvar.h"
+#include "functionproxy.h"
+#include <KeyValues.h>
+#include "mathlib/vmatrix.h"
+#include "toolframework_client.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+// forward declarations
+void ToolFramework_RecordMaterialParams( IMaterial *pMaterial );
+
+class C_FuncConveyor : public C_BaseEntity
+{
+public:
+	DECLARE_CLASS( C_FuncConveyor, C_BaseEntity );
+	DECLARE_CLIENTCLASS();
+
+	C_FuncConveyor();
+
+	float GetConveyorSpeed() { return m_flConveyorSpeed; }
+
+private:
+	float m_flConveyorSpeed;
+};
+
+
+IMPLEMENT_CLIENTCLASS_DT( C_FuncConveyor, DT_FuncConveyor, CFuncConveyor )
+	RecvPropFloat( RECVINFO( m_flConveyorSpeed ) ),
+END_RECV_TABLE()
+
+
+C_FuncConveyor::C_FuncConveyor()
+{
+	m_flConveyorSpeed = 0.0;
+}
+
+
+class CConveyorMaterialProxy : public IMaterialProxy
+{
+public:
+	CConveyorMaterialProxy();
+	virtual ~CConveyorMaterialProxy();
+
+	virtual bool Init( IMaterial *pMaterial, KeyValues *pKeyValues );
+	virtual void OnBind( void *pC_BaseEntity );
+	virtual void Release( void ) { delete this; }
+	virtual IMaterial *GetMaterial();
+
+private:
+	C_BaseEntity *BindArgToEntity( void *pArg );
+
+	IMaterialVar *m_pTextureScrollVar;
+};
+
+CConveyorMaterialProxy::CConveyorMaterialProxy()
+{
+	m_pTextureScrollVar = NULL;
+}
+
+CConveyorMaterialProxy::~CConveyorMaterialProxy()
+{
+}
+
+
+bool CConveyorMaterialProxy::Init( IMaterial *pMaterial, KeyValues *pKeyValues )
+{
+	char const* pScrollVarName = pKeyValues->GetString( "textureScrollVar" );
+	if( !pScrollVarName )
+		return false;
+
+	bool foundVar;
+	m_pTextureScrollVar = pMaterial->FindVar( pScrollVarName, &foundVar, false );
+	if( !foundVar )
+		return false;
+
+	return true;
+}
+
+C_BaseEntity *CConveyorMaterialProxy::BindArgToEntity( void *pArg )
+{
+	IClientRenderable *pRend = (IClientRenderable *)pArg;
+	return pRend->GetIClientUnknown()->GetBaseEntity();
+}
+
+void CConveyorMaterialProxy::OnBind( void *pC_BaseEntity )
+{
+	if( !pC_BaseEntity )
+		return;
+
+	C_BaseEntity *pEntity = BindArgToEntity( pC_BaseEntity );
+
+	if ( !pEntity )
+		return;
+
+	C_FuncConveyor *pConveyor = dynamic_cast<C_FuncConveyor*>(pEntity);
+
+	if ( !pConveyor )
+		return;
+
+	if ( !m_pTextureScrollVar )
+	{
+		return;
+	}
+
+	float flConveyorSpeed	= pConveyor->GetConveyorSpeed();
+	float flRate			= abs( flConveyorSpeed ) / 128.0;
+	float flAngle			= (flConveyorSpeed >= 0) ? 180 : 0;
+
+	float sOffset = gpGlobals->curtime * cos( flAngle * ( M_PI / 180.0f ) ) * flRate;
+	float tOffset = gpGlobals->curtime * sin( flAngle * ( M_PI / 180.0f ) ) * flRate;
+	
+	// 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;
+	
+	if (m_pTextureScrollVar->GetType() == MATERIAL_VAR_TYPE_MATRIX)
+	{
+		VMatrix mat;
+		MatrixBuildTranslation( mat, sOffset, tOffset, 0.0f );
+		m_pTextureScrollVar->SetMatrixValue( mat );
+	}
+	else
+	{
+		m_pTextureScrollVar->SetVecValue( sOffset, tOffset, 0.0f );
+	}
+
+	if ( ToolsEnabled() )
+	{
+		ToolFramework_RecordMaterialParams( GetMaterial() );
+	}
+}
+
+IMaterial *CConveyorMaterialProxy::GetMaterial()
+{
+	return m_pTextureScrollVar ? m_pTextureScrollVar->GetOwningMaterial() : NULL;
+}
+
+EXPOSE_INTERFACE( CConveyorMaterialProxy, IMaterialProxy, "ConveyorScroll" IMATERIAL_PROXY_INTERFACE_VERSION );