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materialsystem/stdshaders/lightmappedgeneric_decal.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Lightmap only shader
+//
+// $Header: $
+// $NoKeywords: $
+//=============================================================================//
+
+#include "BaseVSShader.h"
+
+#include "lightmappedgeneric_decal.inc"
+#include "mathlib/bumpvects.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+
+BEGIN_VS_SHADER( LightmappedGeneric_Decal,
+			  "Help for LightmappedGeneric_Decal" )
+
+	BEGIN_SHADER_PARAMS
+	END_SHADER_PARAMS
+
+	// Set up anything that is necessary to make decisions in SHADER_FALLBACK.
+	SHADER_INIT_PARAMS()
+	{
+		if ( g_pHardwareConfig->SupportsBorderColor() )
+		{
+			params[FLASHLIGHTTEXTURE]->SetStringValue( "effects/flashlight_border" );
+		}
+		else
+		{
+			params[FLASHLIGHTTEXTURE]->SetStringValue( "effects/flashlight001" );
+		}
+
+		// No texture means no self-illum or env mask in base alpha
+		if ( !params[BASETEXTURE]->IsDefined() )
+		{
+			CLEAR_FLAGS( MATERIAL_VAR_SELFILLUM );
+			CLEAR_FLAGS( MATERIAL_VAR_BASEALPHAENVMAPMASK );
+		}
+
+		SET_FLAGS( MATERIAL_VAR_DECAL );
+		SET_FLAGS( MATERIAL_VAR_NO_DEBUG_OVERRIDE );
+		SET_FLAGS2( MATERIAL_VAR2_LIGHTING_LIGHTMAP );
+	}
+
+	SHADER_FALLBACK
+	{
+		return 0;
+	}
+
+	SHADER_INIT
+	{
+		LoadTexture( FLASHLIGHTTEXTURE, TEXTUREFLAGS_SRGB );
+		
+		if (params[BASETEXTURE]->IsDefined())
+		{
+			LoadTexture( BASETEXTURE );
+
+			if ( !params[BASETEXTURE]->GetTextureValue()->IsTranslucent() )
+			{
+				CLEAR_FLAGS( MATERIAL_VAR_SELFILLUM );
+				CLEAR_FLAGS( MATERIAL_VAR_BASEALPHAENVMAPMASK );
+			}
+		}
+
+		// Don't alpha test if the alpha channel is used for other purposes
+		if (IS_FLAG_SET(MATERIAL_VAR_SELFILLUM) || IS_FLAG_SET(MATERIAL_VAR_BASEALPHAENVMAPMASK) )
+		{
+			CLEAR_FLAGS( MATERIAL_VAR_ALPHATEST );
+		}
+	}
+
+	void DrawDecal( IMaterialVar **params, IShaderDynamicAPI *pShaderAPI, IShaderShadow *pShaderShadow )
+	{
+		if( IsSnapshotting() )
+		{
+			// Be sure not to write to dest alpha
+			pShaderShadow->EnableAlphaWrites( false );
+
+			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER2, true );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER3, true );
+
+			SetNormalBlendingShadowState( BASETEXTURE, true ); 
+
+			int pTexCoords[3] = { 2, 2, 1 };
+			pShaderShadow->VertexShaderVertexFormat( VERTEX_POSITION | VERTEX_COLOR, 3, pTexCoords, 0 );
+
+			lightmappedgeneric_decal_Static_Index vshIndex;
+			pShaderShadow->SetVertexShader( "LightmappedGeneric_Decal", vshIndex.GetIndex() );
+			pShaderShadow->SetPixelShader( "LightmappedGeneric_Decal" );
+			FogToFogColor();
+		}
+		else
+		{
+			BindTexture( SHADER_SAMPLER0, BASETEXTURE, FRAME );
+
+			// Load the z^2 components of the lightmap coordinate axes only
+			// This is (N dot basis)^2
+			Vector vecZValues( g_localBumpBasis[0].z, g_localBumpBasis[1].z, g_localBumpBasis[2].z );
+			vecZValues *= vecZValues;
+
+			Vector4D basis[3];
+			basis[0].Init( vecZValues.x, vecZValues.x, vecZValues.x, 0.0f );
+			basis[1].Init( vecZValues.y, vecZValues.y, vecZValues.y, 0.0f );
+			basis[2].Init( vecZValues.z, vecZValues.z, vecZValues.z, 0.0f );
+			pShaderAPI->SetPixelShaderConstant( 0, (float*)basis, 3 );
+
+			pShaderAPI->BindStandardTexture( SHADER_SAMPLER1, TEXTURE_LIGHTMAP_BUMPED );
+			SetVertexShaderTextureTransform( VERTEX_SHADER_SHADER_SPECIFIC_CONST_0, BASETEXTURETRANSFORM );
+			SetModulationPixelShaderDynamicState( 3 );
+
+			lightmappedgeneric_decal_Dynamic_Index vshIndex;
+			vshIndex.SetDOWATERFOG( pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
+			pShaderAPI->SetVertexShaderIndex( vshIndex.GetIndex() );
+		}
+		Draw();
+	}
+
+	SHADER_DRAW
+	{
+		if( UsingFlashlight( params ) )
+		{
+			DrawFlashlight_dx80( params, pShaderAPI, pShaderShadow, false, -1, -1, -1, 
+				FLASHLIGHTTEXTURE, FLASHLIGHTTEXTUREFRAME, true, false, 0, -1, -1 );
+		}
+		else
+		{
+			DrawDecal( params, pShaderAPI, pShaderShadow );
+		}
+	}
+END_SHADER