Full Template for ticket #1

Templates/Full/game/shaders/common/gl/particlesP.glsl

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+//-----------------------------------------------------------------------------
+// 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 "hlslCompat.glsl"
+#include "torque.glsl"
+
+// With advanced lighting we get soft particles.
+#ifdef TORQUE_LINEAR_DEPTH
+   #define SOFTPARTICLES  
+#endif
+
+#define CLIP_Z // TODO: Make this a proper macro
+
+uniform sampler2D diffuseMap;
+
+#ifdef SOFTPARTICLES
+   
+   #include "shadergen:/autogenConditioners.h"
+   
+   uniform float oneOverSoftness;
+   uniform float oneOverFar;
+   uniform sampler2D prepassTex;
+   //uniform vec3 vEye;
+   uniform vec4 prePassTargetParams;
+#endif
+
+uniform float alphaFactor;
+uniform float alphaScale;
+
+varying vec4 color;
+varying vec2 uv0;
+varying vec4 pos;
+
+
+void main()
+{
+   float softBlend = 1.0;
+   
+   #ifdef SOFTPARTICLES
+      float2 tc = pos.xy * vec2(1.0, -1.0 ) / pos.w;
+      tc = viewportCoordToRenderTarget(saturate( ( tc + 1.0 ) * 0.5 ), prePassTargetParams); 
+   
+   	float sceneDepth = prepassUncondition( prepassTex, tc ).w;   	   	   			
+   	float depth = 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
+      if (diff < 0.0)
+         discard;
+	#endif
+      softBlend = saturate( diff * oneOverSoftness );
+   #endif
+		   
+   vec4 diffuse = texture2D( diffuseMap, uv0 );
+   
+   // Scale output color by the alpha factor (turn LerpAlpha into pre-multiplied alpha)
+   vec3 colorScale = ( alphaFactor < 0.0 ? color.rgb * diffuse.rgb : ( alphaFactor > 0.0 ? vec3(color.a * alphaFactor * diffuse.a * softBlend) : vec3(softBlend) ) );
+   
+   gl_FragColor = hdrEncode( vec4(color.rgb * diffuse.rgb * colorScale, softBlend * color.a * diffuse.a * alphaScale) );
+}
+