120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
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//========= Copyright <20> 1996-2005, 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 "materialsystem/IMaterialProxy.h"
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#include "materialsystem/IMaterial.h"
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#include "materialsystem/IMaterialVar.h"
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#include <KeyValues.h>
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#include "mathlib/VMatrix.h"
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#include "functionproxy.h"
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#include "imaterialproxydict.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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// $textureScrollVar
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// $textureScrollRate
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// $textureScrollAngle
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class CTextureScrollMaterialProxy : public IMaterialProxy
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{
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public:
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CTextureScrollMaterialProxy();
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virtual ~CTextureScrollMaterialProxy();
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virtual bool Init( IMaterial *pMaterial, KeyValues *pKeyValues );
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virtual void OnBind( void *pC_BaseEntity );
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virtual void Release( void ) { delete this; }
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virtual IMaterial *GetMaterial();
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private:
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IMaterialVar *m_pTextureScrollVar;
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CFloatInput m_TextureScrollRate;
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CFloatInput m_TextureScrollAngle;
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CFloatInput m_TextureScale;
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};
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CTextureScrollMaterialProxy::CTextureScrollMaterialProxy()
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{
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m_pTextureScrollVar = NULL;
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}
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CTextureScrollMaterialProxy::~CTextureScrollMaterialProxy()
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{
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}
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bool CTextureScrollMaterialProxy::Init( IMaterial *pMaterial, KeyValues *pKeyValues )
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{
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char const* pScrollVarName = pKeyValues->GetString( "textureScrollVar" );
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if( !pScrollVarName )
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return false;
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bool foundVar;
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m_pTextureScrollVar = pMaterial->FindVar( pScrollVarName, &foundVar, false );
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if( !foundVar )
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return false;
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m_TextureScrollRate.Init( pMaterial, pKeyValues, "textureScrollRate", 1.0f );
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m_TextureScrollAngle.Init( pMaterial, pKeyValues, "textureScrollAngle", 0.0f );
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m_TextureScale.Init( pMaterial, pKeyValues, "textureScale", 1.0f );
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return true;
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}
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void CTextureScrollMaterialProxy::OnBind( void *pC_BaseEntity )
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{
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if( !m_pTextureScrollVar )
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{
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return;
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}
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float rate, angle, scale;
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// set default values if these variables don't exist.
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rate = m_TextureScrollRate.GetFloat();
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angle = m_TextureScrollAngle.GetFloat();
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scale = m_TextureScale.GetFloat();
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float sOffset, tOffset;
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sOffset = gpGlobals->curtime * cos( angle * ( M_PI / 180.0f ) ) * rate;
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tOffset = gpGlobals->curtime * sin( angle * ( M_PI / 180.0f ) ) * rate;
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// make sure that we are positive
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if( sOffset < 0.0f )
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{
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sOffset += 1.0f + -( int )sOffset;
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}
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if( tOffset < 0.0f )
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{
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tOffset += 1.0f + -( int )tOffset;
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}
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// make sure that we are in a [0,1] range
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sOffset = sOffset - ( int )sOffset;
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tOffset = tOffset - ( int )tOffset;
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if (m_pTextureScrollVar->GetType() == MATERIAL_VAR_TYPE_MATRIX)
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{
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VMatrix mat( scale, 0.0f, 0.0f, sOffset,
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0.0f, scale, 0.0f, tOffset,
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0.0f, 0.0f, 1.0f, 0.0f,
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0.0f, 0.0f, 0.0f, 1.0f );
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m_pTextureScrollVar->SetMatrixValue( mat );
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}
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else
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{
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m_pTextureScrollVar->SetVecValue( sOffset, tOffset, 0.0f );
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}
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}
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IMaterial *CTextureScrollMaterialProxy::GetMaterial()
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{
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return m_pTextureScrollVar->GetOwningMaterial();
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}
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EXPOSE_MATERIAL_PROXY( CTextureScrollMaterialProxy, TextureScroll );
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