Initial Commit

Assets/Plugins/Light2D/Resources/Shaders/LightAuto.shader

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+/*
+
+This is most expensive light shader with variable count of path tracking steps.
+That shader could be used only on desktop / consoles due to poor performance and required features.
+
+*/
+
+
+Shader "Light2D/Light Auto Points" {
+Properties {
+    _MainTex ("Light texture", 2D) = "white" {}
+    _ObstacleMul ("Obstacle Mul", Float) = 500
+    _EmissionColorMul ("Emission color mul", Float) = 1
+    _StepCountMul ("Raytracking point count multiplier", Float) = 2
+}
+SubShader {	
+    Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
+
+    LOD 100
+    Blend OneMinusDstColor One
+    Cull Off
+    ZWrite Off
+    Lighting Off
+
+    Pass {  
+        CGPROGRAM
+        #pragma target 3.0 // replace with 4.0 if you see glitches with big _StepCountMul or texture resolution.
+		#pragma multi_compile ORTHOGRAPHIC_CAMERA PERSPECTIVE_CAMERA
+        #pragma glsl_no_auto_normalization
+		#pragma glsl
+            
+        #include "UnityCG.cginc"
+		#include "LightBase.cginc" 
+			
+		#pragma vertex light2d_fixed_vert
+        #pragma fragment frag
+            
+        uniform half _StepCountMul;
+
+        half4 frag (light2d_fixed_v2f i) : COLOR
+        {
+            half4 tex = tex2D(_MainTex, i.texcoord);
+				
+			#ifdef PERSPECTIVE_CAMERA
+			half4 vPos = ComputeScreenPos(i.projVertex);
+			half2 thisPos = (vPos.xy/vPos.w - 0.5)*_ExtendedToSmallTextureScale + 0.5;
+			half4 cPos = ComputeScreenPos(mul(UNITY_MATRIX_VP, float4(i.texcoord1, 0, 1)));
+			half2 centerPos = (cPos.xy/cPos.w - 0.5)*_ExtendedToSmallTextureScale + 0.5;
+			#ifdef UNITY_HALF_TEXEL_OFFSET
+			thisPos += _PosOffset;
+			centerPos += _PosOffset;
+			#endif
+			#else
+			half2 thisPos = i.thisPos;
+			half2 centerPos = i.centerPos;
+			#endif
+				
+            half pixelSize = 1.0/_ScreenParams.y;
+			half len = length((thisPos - centerPos)*i.aspect);
+            int steps = round(_StepCountMul * len / pixelSize);
+
+			half sub = 1.0/steps;
+			half m = _ObstacleMul*sub*len;
+			
+			half4 col = i.color*tex*tex.a*i.color.a;
+
+			half pos = 0;
+	
+
+			for(half i = 0; i < steps; i++)
+			{
+				pos += sub; 
+				half4 obstacle = tex2Dlod(_ObstacleTex, half4(lerp(centerPos, thisPos, pos), 0, 0));
+				col *= saturate(1 - (1 - obstacle)*obstacle.a*m);
+			}
+
+			col.rgb *= _EmissionColorMul;
+
+			return col;
+        }
+        ENDCG
+    }
+}
+
+Fallback "Light2D/Light 80 Points"
+
+}