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materialsystem/stdshaders/particlesphere_dx8.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: A wet version of base * lightmap
+//
+// $Header: $
+// $NoKeywords: $
+//=============================================================================//
+
+#include "BaseVSShader.h"
+
+#include "particlesphere_vs11.inc"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+DEFINE_FALLBACK_SHADER( ParticleSphere, ParticleSphere_DX8 )
+
+BEGIN_VS_SHADER_FLAGS( ParticleSphere_DX8, "Help for BumpmappedEnvMap", SHADER_NOT_EDITABLE  )
+			   
+	BEGIN_SHADER_PARAMS
+		SHADER_PARAM( USINGPIXELSHADER, SHADER_PARAM_TYPE_BOOL, "0", "Tells to client code whether the shader is using DX8 vertex/pixel shaders or not" )
+		SHADER_PARAM( BUMPMAP, SHADER_PARAM_TYPE_TEXTURE, "models/shadertest/shader1_normal", "bumpmap" )
+		SHADER_PARAM( LIGHTS, SHADER_PARAM_TYPE_FOURCC, "", "array of lights" )
+		SHADER_PARAM( LIGHT_POSITION, SHADER_PARAM_TYPE_VEC3, "0 0 0", "This is the directional light position." )
+		SHADER_PARAM( LIGHT_COLOR, SHADER_PARAM_TYPE_VEC3, "1 1 1", "This is the directional light color." )
+	END_SHADER_PARAMS
+
+	bool UsePixelShaders( IMaterialVar **params ) const
+	{
+		return  (!params || params[BUMPMAP]->IsDefined()) && g_pHardwareConfig->SupportsVertexAndPixelShaders();
+	}
+
+	SHADER_INIT
+	{
+		// If this would return false, then we should have fallen back to the DX6 one.
+		Assert( UsePixelShaders( params ) );
+
+		params[USINGPIXELSHADER]->SetIntValue( true );
+		LoadBumpMap( BUMPMAP );
+	}
+
+	SHADER_FALLBACK
+	{
+		if ( IsPC() && !UsePixelShaders(params) )
+		{
+			return "UnlitGeneric_DX6";
+		}
+		return 0;
+	}
+
+	SHADER_DRAW
+	{
+		SHADOW_STATE
+		{
+			pShaderShadow->EnableTexture( SHADER_SAMPLER0, true );
+			
+			int tCoordDimensions[] = {2};
+			pShaderShadow->VertexShaderVertexFormat( 
+				VERTEX_POSITION | VERTEX_COLOR, 1, tCoordDimensions, 0 );
+
+			pShaderShadow->EnableBlending( true );
+			pShaderShadow->BlendFunc( SHADER_BLEND_SRC_ALPHA, SHADER_BLEND_ONE_MINUS_SRC_ALPHA );
+			pShaderShadow->EnableDepthWrites( false );
+			
+			particlesphere_vs11_Static_Index vshIndex;
+			pShaderShadow->SetVertexShader( "ParticleSphere_vs11", vshIndex.GetIndex() );
+
+			pShaderShadow->SetPixelShader( "ParticleSphere_ps11" );
+			FogToFogColor();
+		}
+		DYNAMIC_STATE
+		{
+			BindTexture( SHADER_SAMPLER0, BUMPMAP );
+
+			pShaderAPI->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_0, params[LIGHT_POSITION]->GetVecValue() );
+			
+			// Separate the light color into something that has a max value of 1 and a scale
+			// so the vertex shader can determine if it's going to overflow the color and scale back
+			// if it needs to.
+			//
+			// (It does this by seeing if the intensity*1/distSqr is > 1. If so, then it scales it so
+			// it is equal to 1).
+			const float *f = params[LIGHT_COLOR]->GetVecValue();
+			Vector vLightColor( f[0], f[1], f[2] );
+			float flScale = max( vLightColor.x, max( vLightColor.y, vLightColor.z ) );
+			if ( flScale < 0.01f )
+				flScale = 0.01f;
+			float vScaleVec[3] = { flScale, flScale, flScale };
+			vLightColor /= flScale;
+
+			pShaderAPI->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_1, vLightColor.Base() );
+			pShaderAPI->SetVertexShaderConstant( VERTEX_SHADER_SHADER_SPECIFIC_CONST_2, vScaleVec );
+
+			// Compute the vertex shader index.
+			particlesphere_vs11_Dynamic_Index vshIndex;
+			vshIndex.SetFOGTYPE( s_pShaderAPI->GetSceneFogMode() == MATERIAL_FOG_LINEAR_BELOW_FOG_Z );
+			s_pShaderAPI->SetVertexShaderIndex( vshIndex.GetIndex() );
+		}
+		Draw();
+	}
+END_SHADER