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materialsystem/stdshaders/unlittwotexture_dx6.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $Header: $
+// $NoKeywords: $
+//===========================================================================//
+
+#include "shaderlib/cshader.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+DEFINE_FALLBACK_SHADER( UnlitTwoTexture, UnlitTwoTexture_DX6 )
+
+BEGIN_SHADER( UnlitTwoTexture_DX6, 
+			  "Help for UnlitTwoTexture_DX6" )
+			  
+	BEGIN_SHADER_PARAMS
+		SHADER_PARAM( TEXTURE2, SHADER_PARAM_TYPE_TEXTURE, "shadertest/BaseTexture", "second texture" )
+		SHADER_PARAM( FRAME2, SHADER_PARAM_TYPE_INTEGER, "0", "frame number for $texture2" )
+		SHADER_PARAM( TEXTURE2TRANSFORM, SHADER_PARAM_TYPE_MATRIX, "center .5 .5 scale 1 1 rotate 0 translate 0 0", "$texture2 texcoord transform" )
+	END_SHADER_PARAMS
+
+	SHADER_INIT
+	{
+		if (params[BASETEXTURE]->IsDefined())
+			LoadTexture( BASETEXTURE );
+		if (params[TEXTURE2]->IsDefined())
+			LoadTexture( TEXTURE2 );
+	}
+
+	SHADER_DRAW
+	{
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+			pShaderShadow->EnableTexture( SHADER_SAMPLER1, true );
+			SetModulationShadowState();
+
+			// Either we've got a constant modulation
+			bool isTranslucent = IsAlphaModulating();
+
+			// Or we've got a texture alpha on either texture
+			isTranslucent = isTranslucent || TextureIsTranslucent( BASETEXTURE, true ) ||
+				TextureIsTranslucent( TEXTURE2, true );
+
+			if ( isTranslucent )
+			{
+				if ( IS_FLAG_SET(MATERIAL_VAR_ADDITIVE) )
+				{
+					EnableAlphaBlending( SHADER_BLEND_SRC_ALPHA, SHADER_BLEND_ONE );
+				}
+				else
+				{
+					EnableAlphaBlending( SHADER_BLEND_SRC_ALPHA, SHADER_BLEND_ONE_MINUS_SRC_ALPHA );
+				}
+			}
+			else
+			{
+				if ( IS_FLAG_SET(MATERIAL_VAR_ADDITIVE) )
+				{
+					EnableAlphaBlending( SHADER_BLEND_ONE, SHADER_BLEND_ONE );
+				}
+				else
+				{
+					DisableAlphaBlending( );
+				}
+			}
+
+			pShaderShadow->DrawFlags( SHADER_DRAW_POSITION | SHADER_DRAW_TEXCOORD0 |
+				SHADER_DRAW_TEXCOORD1 );
+			DefaultFog();
+		}
+		DYNAMIC_STATE
+		{
+			BindTexture( SHADER_SAMPLER0, BASETEXTURE, FRAME );
+			SetFixedFunctionTextureTransform( MATERIAL_TEXTURE0, BASETEXTURETRANSFORM );
+			BindTexture( SHADER_SAMPLER1, TEXTURE2, FRAME2 );
+			SetFixedFunctionTextureTransform( MATERIAL_TEXTURE1, TEXTURE2TRANSFORM );
+			SetModulationDynamicState();
+		}
+		Draw();
+	}
+END_SHADER