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materialsystem/stdshaders/portal_refract.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+
+#include "BaseVSShader.h"
+#include "portal_refract_helper.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+DEFINE_FALLBACK_SHADER( PortalRefract, PortalRefract_dx9 )
+BEGIN_VS_SHADER( PortalRefract_dx9, "PortalRefract" )
+	BEGIN_SHADER_PARAMS
+		SHADER_PARAM( STAGE, SHADER_PARAM_TYPE_INTEGER, "0", "Stage of portal rendering (0, 1, 2)" )
+		SHADER_PARAM( PORTALOPENAMOUNT, SHADER_PARAM_TYPE_FLOAT, "0.0", "Portal open amount 0.0-1.0" )
+		SHADER_PARAM( PORTALSTATIC, SHADER_PARAM_TYPE_FLOAT, "0.0", "Portal static amount 0.0-1.0" )
+		SHADER_PARAM( PORTALMASKTEXTURE, SHADER_PARAM_TYPE_TEXTURE, "", "Mask texture" )
+		SHADER_PARAM( TEXTURETRANSFORM, SHADER_PARAM_TYPE_MATRIX, "center .5 .5 scale 1 1 rotate 0 translate 0 0", "Texcoord transform" )
+		SHADER_PARAM( PORTALCOLORTEXTURE, SHADER_PARAM_TYPE_TEXTURE, "", "Color texture" )
+		SHADER_PARAM( PORTALCOLORSCALE, SHADER_PARAM_TYPE_FLOAT, "0.0", "Portal color scale" )
+		SHADER_PARAM( TIME, SHADER_PARAM_TYPE_FLOAT, "0.0", "Needs CurrentTime Proxy" )
+	END_SHADER_PARAMS
+
+	void SetupVarsPortalRefract( PortalRefractVars_t &info )
+	{
+		info.m_nStage = STAGE;
+		info.m_nPortalOpenAmount = PORTALOPENAMOUNT;
+		info.m_nPortalStatic = PORTALSTATIC;
+		info.m_nPortalMaskTexture = PORTALMASKTEXTURE;
+		info.m_nTextureTransform = TEXTURETRANSFORM;
+		info.m_nPortalColorTexture = PORTALCOLORTEXTURE;
+		info.m_nPortalColorScale = PORTALCOLORSCALE;
+		info.m_nTime = TIME;
+	}
+
+	bool NeedsPowerOfTwoFrameBufferTexture( IMaterialVar **params, bool bCheckSpecificToThisFrame ) const 
+	{
+		// For setting model flag at load time
+		if ( bCheckSpecificToThisFrame == false )
+			return true;
+
+		// We only need the texture for stage 0
+		if ( params[STAGE]->GetIntValue() == 0 )
+		{
+			//Msg( "Portal Refract @ %f time\n", params[TIME]->GetFloatValue() );
+			return true;
+		}
+		else
+		{
+			return false;
+		}
+	}
+
+	SHADER_INIT_PARAMS()
+	{
+		PortalRefractVars_t info;
+		SetupVarsPortalRefract( info );
+		InitParamsPortalRefract( this, params, pMaterialName, info );
+	}
+
+	SHADER_FALLBACK
+	{
+		if ( g_pHardwareConfig->GetDXSupportLevel() < 90 )
+		{
+			return "PortalRefract_dx8";
+		}
+
+		return 0;
+	}
+
+	SHADER_INIT
+	{
+		PortalRefractVars_t info;
+		SetupVarsPortalRefract( info );
+		InitPortalRefract( this, params, info );
+	}
+
+	SHADER_DRAW
+	{
+		// Skip drawing if in stage 0 and the portal isn't partially opened
+		bool bDraw = true;
+		if ( ( params[STAGE]->GetIntValue() == 0 ) && ( ( params[PORTALOPENAMOUNT]->GetFloatValue() <= 0.0f ) || ( params[PORTALOPENAMOUNT]->GetFloatValue() >= 1.0f ) ) ) // If in stage 0 and not partially opened
+		{
+			bDraw = false;
+		}
+
+		// If ( snapshotting ) or ( we need to draw this frame )
+		if ( ( pShaderShadow != NULL ) || ( bDraw == true ) )
+		{
+			PortalRefractVars_t info;
+			SetupVarsPortalRefract( info );
+			DrawPortalRefract( this, params, pShaderAPI, pShaderShadow, info );
+		}
+		else // We're not snapshotting and we don't need to draw this frame
+		{
+			// Skip this pass!
+			Draw( false );
+		}
+	}
+END_SHADER