modified maps

modified maps

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

@@ -0,0 +1,224 @@
+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
+Shader "Hidden/SunShaftsComposite" {
+	Properties {
+		_MainTex ("Base", 2D) = "" {}
+		_ColorBuffer ("Color", 2D) = "" {}
+		_Skybox ("Skybox", 2D) = "" {}
+	}
+	
+	CGINCLUDE
+				
+	#include "UnityCG.cginc"
+	
+	struct v2f {
+		float4 pos : SV_POSITION;
+		float2 uv : TEXCOORD0;
+		#if UNITY_UV_STARTS_AT_TOP
+		float2 uv1 : TEXCOORD1;
+		#endif		
+	};
+		
+	struct v2f_radial {
+		float4 pos : SV_POSITION;
+		float2 uv : TEXCOORD0;
+		float2 blurVector : TEXCOORD1;
+	};
+		
+	sampler2D _MainTex;
+	sampler2D _ColorBuffer;
+	sampler2D _Skybox;
+	sampler2D_float _CameraDepthTexture;
+
+	uniform half4 _SunThreshold;
+		
+	uniform half4 _SunColor;
+	uniform half4 _BlurRadius4;
+	uniform half4 _SunPosition;
+	uniform half4 _MainTex_TexelSize;	
+
+	#define SAMPLES_FLOAT 6.0f
+	#define SAMPLES_INT 6
+			
+	v2f vert( appdata_img v ) {
+		v2f o;
+		o.pos = UnityObjectToClipPos(v.vertex);
+		o.uv = v.texcoord.xy;
+		
+		#if UNITY_UV_STARTS_AT_TOP
+		o.uv1 = v.texcoord.xy;
+		if (_MainTex_TexelSize.y < 0)
+			o.uv1.y = 1-o.uv1.y;
+		#endif				
+		
+		return o;
+	}
+		
+	half4 fragScreen(v2f i) : SV_Target { 
+		half4 colorA = tex2D (_MainTex, i.uv.xy);
+		#if UNITY_UV_STARTS_AT_TOP
+		half4 colorB = tex2D (_ColorBuffer, i.uv1.xy);
+		#else
+		half4 colorB = tex2D (_ColorBuffer, i.uv.xy);
+		#endif
+		half4 depthMask = saturate (colorB * _SunColor);	
+		return 1.0f - (1.0f-colorA) * (1.0f-depthMask);	
+	}
+
+	half4 fragAdd(v2f i) : SV_Target { 
+		half4 colorA = tex2D (_MainTex, i.uv.xy);
+		#if UNITY_UV_STARTS_AT_TOP
+		half4 colorB = tex2D (_ColorBuffer, i.uv1.xy);
+		#else
+		half4 colorB = tex2D (_ColorBuffer, i.uv.xy);
+		#endif
+		half4 depthMask = saturate (colorB * _SunColor);	
+		return colorA + depthMask;	
+	}
+	
+	v2f_radial vert_radial( appdata_img v ) {
+		v2f_radial o;
+		o.pos = UnityObjectToClipPos(v.vertex);
+		
+		o.uv.xy =  v.texcoord.xy;
+		o.blurVector = (_SunPosition.xy - v.texcoord.xy) * _BlurRadius4.xy;	
+		
+		return o; 
+	}
+	
+	half4 frag_radial(v2f_radial i) : SV_Target 
+	{	
+		half4 color = half4(0,0,0,0);
+		for(int j = 0; j < SAMPLES_INT; j++)   
+		{	
+			half4 tmpColor = tex2D(_MainTex, i.uv.xy);
+			color += tmpColor;
+			i.uv.xy += i.blurVector; 	
+		}
+		return color / SAMPLES_FLOAT;
+	}	
+	
+	half TransformColor (half4 skyboxValue) {
+		return dot(max(skyboxValue.rgb - _SunThreshold.rgb, half3(0,0,0)), half3(1,1,1)); // threshold and convert to greyscale
+	}
+	
+	half4 frag_depth (v2f i) : SV_Target {
+		#if UNITY_UV_STARTS_AT_TOP
+		float depthSample = SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture, i.uv1.xy);
+		#else
+		float depthSample = SAMPLE_DEPTH_TEXTURE(_CameraDepthTexture, i.uv.xy);		
+		#endif
+		
+		half4 tex = tex2D (_MainTex, i.uv.xy);
+		
+		depthSample = Linear01Depth (depthSample);
+		 
+		// consider maximum radius
+		#if UNITY_UV_STARTS_AT_TOP
+		half2 vec = _SunPosition.xy - i.uv1.xy;
+		#else
+		half2 vec = _SunPosition.xy - i.uv.xy;		
+		#endif
+		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 frag_nodepth (v2f i) : SV_Target {
+		#if UNITY_UV_STARTS_AT_TOP
+		float4 sky = (tex2D (_Skybox, i.uv1.xy));
+		#else
+		float4 sky = (tex2D (_Skybox, i.uv.xy));		
+		#endif
+		
+		float4 tex = (tex2D (_MainTex, i.uv.xy));
+		
+		// consider maximum radius
+		#if UNITY_UV_STARTS_AT_TOP
+		half2 vec = _SunPosition.xy - i.uv1.xy;
+		#else
+		half2 vec = _SunPosition.xy - i.uv.xy;		
+		#endif
+		half dist = saturate (_SunPosition.w - length (vec));			
+		
+		half4 outColor = 0;		
+		
+		// find unoccluded sky pixels
+		// consider pixel values that differ significantly between framebuffer and sky-only buffer as occluded
+		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 fragScreen
+      
+      ENDCG
+  }
+  
+ Pass {
+	  ZTest Always Cull Off ZWrite Off
+
+      CGPROGRAM
+      
+      #pragma vertex vert_radial
+      #pragma fragment frag_radial
+      
+      ENDCG
+  }
+  
+  Pass {
+	  ZTest Always Cull Off ZWrite Off
+
+      CGPROGRAM
+      
+      #pragma vertex vert
+      #pragma fragment frag_depth
+      
+      ENDCG
+  }
+  
+  Pass {
+	  ZTest Always Cull Off ZWrite Off
+
+      CGPROGRAM
+      
+      #pragma vertex vert
+      #pragma fragment frag_nodepth
+      
+      ENDCG
+  } 
+  
+  Pass {
+	  ZTest Always Cull Off ZWrite Off
+
+      CGPROGRAM
+      
+      #pragma vertex vert
+      #pragma fragment fragAdd
+      
+      ENDCG
+  } 
+}
+
+Fallback off
+	
+} // shader