Templates changes for OpenGL shaders.

Templates/Full/game/shaders/common/postFx/caustics/gl/causticsP.glsl

@@ -0,0 +1,85 @@
+//-----------------------------------------------------------------------------
+// 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 "../../../gl/hlslCompat.glsl"
+#include "../../gl/postFX.glsl"
+#include "shadergen:/autogenConditioners.h"
+
+uniform vec3    eyePosWorld;
+uniform vec4    rtParams0;
+uniform vec4    waterFogPlane;
+uniform float     accumTime;
+
+uniform sampler2D prepassTex;
+uniform sampler2D causticsTex0;
+uniform sampler2D causticsTex1;
+uniform vec2 targetSize;
+
+float distanceToPlane(vec4 plane, vec3 pos)
+{
+   return (plane.x * pos.x + plane.y * pos.y + plane.z * pos.z) + plane.w;
+}
+
+void main()             
+{   
+   //Sample the pre-pass
+   vec4 prePass = prepassUncondition( prepassTex, IN_uv0 );
+   
+   //Get depth
+   float depth = prePass.w;   
+   if(depth > 0.9999)
+   {
+      OUT_FragColor0 = vec4(0,0,0,0);
+      return;
+   }
+   
+   //Get world position
+   vec3 pos = eyePosWorld + IN_wsEyeRay * depth;
+   
+   // Check the water depth
+   float waterDepth = -distanceToPlane(waterFogPlane, pos);
+   if(waterDepth < 0)
+   {
+      OUT_FragColor0 = vec4(0,0,0,0);
+      return;
+   }
+   waterDepth = saturate(waterDepth);
+   
+   //Use world position X and Y to calculate caustics UV 
+   vec2 causticsUV0 = mod(abs(pos.xy * 0.25), vec2(1, 1));
+   vec2 causticsUV1 = mod(abs(pos.xy * 0.2), vec2(1, 1));
+   
+   //Animate uvs
+   float timeSin = sin(accumTime);
+   causticsUV0.xy += vec2(accumTime*0.1, timeSin*0.2);
+   causticsUV1.xy -= vec2(accumTime*0.15, timeSin*0.15);   
+   
+   //Sample caustics texture   
+   vec4 caustics = texture(causticsTex0, causticsUV0);   
+   caustics *= texture(causticsTex1, causticsUV1);
+   
+   //Use normal Z to modulate caustics  
+   //float waterDepth = 1 - saturate(pos.z + waterFogPlane.w + 1);
+   caustics *= saturate(prePass.z) * pow(1-depth, 64) * waterDepth; 
+      
+   OUT_FragColor0 = caustics;   
+}