modified maps

modified maps

Assets/NatureStarterKit2/Standard Assets/Effects/ImageEffects/Shaders/PrepareSunShaftsBlur.shader

@@ -0,0 +1,99 @@
+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
+
+Shader "Hidden/PrepareSunShaftsBlur" {
+	Properties {
+		_MainTex ("Base", 2D) = "" {}
+		_Skybox ("Skybox", 2D) = "" {}
+	}
+	
+	CGINCLUDE
+	
+	#include "UnityCG.cginc"
+	
+	struct v2f {
+		float4 pos : SV_POSITION;
+		float2 uv : TEXCOORD0;
+	};
+	
+	sampler2D _MainTex;
+	sampler2D _Skybox; 
+	sampler2D_float _CameraDepthTexture;
+	
+	uniform half _NoSkyBoxMask;
+	uniform half4 _SunPosition; 
+		
+	v2f vert (appdata_img v) {
+		v2f o;
+		o.pos = UnityObjectToClipPos(v.vertex);
+		o.uv = v.texcoord.xy;
+		return o;
+	}  
+	
+	half TransformColor (half4 skyboxValue) {
+		return max (skyboxValue.a, _NoSkyBoxMask * dot (skyboxValue.rgb, float3 (0.59,0.3,0.11))); 		
+	}
+	
+	half4 frag (v2f i) : SV_Target {
+		float depthSample = SAMPLE_DEPTH_TEXTURE( _CameraDepthTexture, i.uv.xy);
+		half4 tex = tex2D (_MainTex, i.uv.xy);
+		
+		depthSample = Linear01Depth (depthSample);
+		 
+		// consider maximum radius
+		half2 vec = _SunPosition.xy - i.uv.xy;
+		half dist = saturate (_SunPosition.w - length (vec.xy));		
+		
+		half4 outColor = 0;
+		
+		// consider shafts blockers
+		if (depthSample > 0.99)
+			outColor = TransformColor (tex) * dist;
+			
+		return outColor;
+	}
+	
+	half4 fragNoDepthNeeded (v2f i) : SV_Target {
+		float4 sky = (tex2D (_Skybox, i.uv.xy));
+		float4 tex = (tex2D (_MainTex, i.uv.xy));
+		
+		// consider maximum radius
+		half2 vec = _SunPosition.xy - i.uv.xy;
+		half dist = saturate (_SunPosition.w - length (vec));			
+		
+		half4 outColor = 0;		
+		
+		if (Luminance ( abs(sky.rgb - tex.rgb)) < 0.2)
+			outColor = TransformColor (sky) * dist;
+		
+		return outColor;
+	}	
+
+	ENDCG 
+	
+Subshader {
+ Pass {
+	  ZTest Always Cull Off ZWrite Off
+
+      CGPROGRAM
+      
+      #pragma vertex vert
+      #pragma fragment frag
+      
+      ENDCG
+  }
+  Pass {
+	  ZTest Always Cull Off ZWrite Off
+
+      CGPROGRAM
+      
+      #pragma vertex vert
+      #pragma fragment fragNoDepthNeeded
+      
+      ENDCG
+  } 
+}
+
+Fallback off
+	
+} // shader