Full Template for ticket #1

Templates/Full/game/shaders/common/particlesP.hlsl

@@ -0,0 +1,109 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#include "torque.hlsl"
+   
+// With advanced lighting we get soft particles.
+#ifdef TORQUE_LINEAR_DEPTH
+   #define SOFTPARTICLES  
+#endif
+
+#ifdef SOFTPARTICLES
+   
+   #include "shadergen:/autogenConditioners.h"
+   
+   uniform float oneOverSoftness;
+   uniform float oneOverFar;
+   uniform sampler2D prepassTex : register(S1);   
+   //uniform float3 vEye;
+   uniform float4 prePassTargetParams;
+#endif
+
+#define CLIP_Z // TODO: Make this a proper macro
+
+struct Conn
+{
+   float4 color : TEXCOORD0;
+   float2 uv0 : TEXCOORD1;
+	float4 pos : TEXCOORD2;
+};
+
+uniform sampler2D diffuseMap : register(S0);
+
+uniform sampler2D paraboloidLightMap : register(S2);
+
+float4 lmSample( float3 nrm )
+{
+   bool calcBack = (nrm.z < 0.0);
+   if ( calcBack )
+      nrm.z = nrm.z * -1.0;
+
+   float2 lmCoord;
+   lmCoord.x = (nrm.x / (2*(1 + nrm.z))) + 0.5;
+   lmCoord.y = 1-((nrm.y / (2*(1 + nrm.z))) + 0.5);
+
+
+   // If this is the back, offset in the atlas
+   if ( calcBack )
+      lmCoord.x += 1.0;
+      
+   // Atlasing front and back maps, so scale
+   lmCoord.x *= 0.5;
+
+   return tex2D(paraboloidLightMap, lmCoord);
+}
+
+
+uniform float alphaFactor;
+uniform float alphaScale;
+
+float4 main( Conn IN ) : COLOR
+{
+   float softBlend = 1;
+   
+   #ifdef SOFTPARTICLES
+      float2 tc = IN.pos.xy * float2(1.0, -1.0) / IN.pos.w;
+      tc = viewportCoordToRenderTarget(saturate( ( tc + 1.0 ) * 0.5 ), prePassTargetParams); 
+   
+   	float sceneDepth = prepassUncondition( prepassTex, tc ).w;   	   	   			
+   	float depth = IN.pos.w * oneOverFar;   	
+	float diff = sceneDepth - depth;
+	#ifdef CLIP_Z
+	   // If drawing offscreen, this acts as the depth test, since we don't line up with the z-buffer
+	   // When drawing high-res, though, we want to be able to take advantage of hi-z
+	   // so this is #ifdef'd out
+	   //clip(diff);
+	#endif
+      softBlend = saturate( diff * oneOverSoftness );
+   #endif
+	   
+   float4 diffuse = tex2D( diffuseMap, IN.uv0 );
+   
+   //return float4( lmSample(float3(0, 0, -1)).rgb, IN.color.a * diffuse.a * softBlend * alphaScale);
+   
+   // Scale output color by the alpha factor (turn LerpAlpha into pre-multiplied alpha)
+   float3 colorScale = ( alphaFactor < 0.0 ? IN.color.rgb * diffuse.rgb : ( alphaFactor > 0.0 ? IN.color.a * diffuse.a * alphaFactor * softBlend : softBlend ) );
+   
+   return hdrEncode( float4( IN.color.rgb * diffuse.rgb * colorScale,
+                  IN.color.a * diffuse.a * softBlend * alphaScale ) );
+}
+