New PostFx (Underwater, Turbulence, and Camera Based Motion Blur)

Templates/Full/game/shaders/common/postFx/caustics/causticsP.hlsl

@@ -0,0 +1,66 @@
+//-----------------------------------------------------------------------------
+// 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 "../postFx.hlsl"
+#include "shadergen:/autogenConditioners.h"
+
+uniform float3    eyePosWorld;
+uniform float4    rtParams0;
+uniform float4    waterFogPlane;
+uniform float     accumTime;
+
+float4 main( PFXVertToPix IN, 
+             uniform sampler2D prepassTex :register(S0),
+             uniform sampler2D causticsTex0 :register(S1),
+             uniform sampler2D causticsTex1 :register(S2),
+             uniform float2 targetSize : register(C0) ) : COLOR
+{   
+   //Sample the pre-pass
+   float2 prepassCoord = ( IN.uv0.xy * rtParams0.zw ) + rtParams0.xy;  
+   float4 prePass = prepassUncondition( prepassTex, prepassCoord );
+   
+   //Get depth
+   float depth = prePass.w;   
+   clip( 0.9999 - depth );
+   
+   //Get world position
+   float3 pos = eyePosWorld + IN.wsEyeRay * depth;
+   
+   //Use world position X and Y to calculate caustics UV 
+   float2 causticsUV0 = (abs(pos.xy * 0.25) % float2(1, 1));
+   float2 causticsUV1 = (abs(pos.xy * 0.2) % float2(1, 1));
+   
+   //Animate uvs
+   float timeSin = sin(accumTime);
+   causticsUV0.xy += float2(accumTime*0.1, timeSin*0.2);
+   causticsUV1.xy -= float2(accumTime*0.15, timeSin*0.15);   
+   
+   //Sample caustics texture   
+   float4 caustics = tex2D(causticsTex0, causticsUV0);   
+   caustics *= tex2D(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; 
+      
+   return caustics;   
+}