118 lines
2.8 KiB
C++
118 lines
2.8 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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// $NoKeywords: $
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//=============================================================================//
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#include "cbase.h"
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#include "proxyentity.h"
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#include "materialsystem/imaterial.h"
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#include "materialsystem/imaterialvar.h"
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#include "c_baseobject.h"
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#include <KeyValues.h>
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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//-----------------------------------------------------------------------------
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// Purpose:
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//-----------------------------------------------------------------------------
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class CObjectBuildAlphaProxy : public CEntityMaterialProxy
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{
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public:
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CObjectBuildAlphaProxy();
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virtual ~CObjectBuildAlphaProxy();
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virtual bool Init( IMaterial *pMaterial, KeyValues* pKeyValues );
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virtual void OnBind( C_BaseEntity *pC_BaseEntity );
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private:
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IMaterialVar* m_pAlphaVar;
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float buildstart;
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float buildend;
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};
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//-----------------------------------------------------------------------------
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// Constructor, destructor
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//-----------------------------------------------------------------------------
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CObjectBuildAlphaProxy::CObjectBuildAlphaProxy()
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{
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m_pAlphaVar = 0;
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}
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CObjectBuildAlphaProxy::~CObjectBuildAlphaProxy()
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{
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}
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//-----------------------------------------------------------------------------
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// Init baby...
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//-----------------------------------------------------------------------------
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bool CObjectBuildAlphaProxy::Init( IMaterial *pMaterial, KeyValues* pKeyValues )
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{
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bool foundVar;
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m_pAlphaVar = pMaterial->FindVar( "$alpha", &foundVar, false );
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if( !foundVar )
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{
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m_pAlphaVar = 0;
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}
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buildstart = pKeyValues->GetFloat( "buildstart", 1.0f );
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buildend = pKeyValues->GetFloat( "buildfinish", 1.0f );
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return true;
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}
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//-----------------------------------------------------------------------------
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// Set the appropriate texture...
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//-----------------------------------------------------------------------------
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void CObjectBuildAlphaProxy::OnBind( C_BaseEntity *pEntity )
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{
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if( !m_pAlphaVar )
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return;
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// It needs to be a TF2 C_BaseObject to have this proxy applied
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C_BaseObject *pObject = dynamic_cast< C_BaseObject * >( pEntity );
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if ( !pObject )
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return;
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float build_amount = pObject->GetCycle(); //pObject->GetPercentageConstructed();
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float frac;
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if ( build_amount <= buildstart )
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{
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frac = 0.0f;
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}
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else if ( build_amount >= buildend )
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{
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frac = 1.0f;
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}
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else
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{
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// Avoid div by zero
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if ( buildend == buildstart )
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{
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frac = 1.0f;
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}
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else
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{
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frac = ( build_amount - buildstart ) / ( buildend - buildstart );
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frac = clamp( frac, 0.0f, 1.0f );
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}
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}
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if ( !pObject->IsBuilding() )
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{
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frac = 1.0f;
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}
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m_pAlphaVar->SetFloatValue( frac );
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}
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EXPOSE_INTERFACE( CObjectBuildAlphaProxy, IMaterialProxy, "TFObjectBuildAlpha" IMATERIAL_PROXY_INTERFACE_VERSION );
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