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core-dump/Shader/Note.shader

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+Shader "AstroDX/Note"
+{
+    Properties
+    {
+        [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
+        _GradientTex ("Gradient Texture", 2D) = "white" {}
+        
+        _Color ("Tint", Color) = (1,1,1,1)
+        _ShadowColor ("Shadow Tint", Color) = (0,0,0,1)
+        _Grayscale("Grayscale", Range(0, 1)) = 0
+        [MaterialToggle] _Shine ("Shine", Float) = 0
+        [MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
+    }
+
+    SubShader
+    {
+        Tags
+        {
+            "Queue"="Transparent"
+            "IgnoreProjector"="True"
+            "RenderType"="Transparent"
+            "PreviewType"="Plane"
+            "CanUseSpriteAtlas"="True"
+        }
+
+        Cull Off
+        Lighting Off
+        ZWrite Off
+        Blend SrcAlpha OneMinusSrcAlpha
+
+        Pass
+        {
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma multi_compile _ PIXELSNAP_ON
+            #include "UnityCG.cginc"
+
+            struct appdata_t
+            {
+                fixed4 vertex : POSITION;
+                fixed4 color : COLOR;
+                fixed2 texcoord : TEXCOORD0;
+            };
+
+            struct v2f
+            {
+                fixed4 vertex : SV_POSITION;
+                fixed4 color : COLOR;
+                fixed2 texcoord : TEXCOORD0;
+            };
+
+            fixed4 _Color;
+            fixed _Shine;
+
+            v2f vert(appdata_t IN)
+            {
+                v2f OUT;
+                OUT.vertex = UnityObjectToClipPos(IN.vertex);
+                OUT.texcoord = IN.texcoord;
+                OUT.color = IN.color * _Color;
+                #ifdef PIXELSNAP_ON
+				OUT.vertex = UnityPixelSnap (OUT.vertex);
+                #endif
+
+                return OUT;
+            }
+
+            sampler2D _MainTex;
+            sampler2D _GradientTex;
+            sampler2D _AlphaTex;
+            fixed4 _ShadowColor;
+            fixed _AlphaSplitEnabled;
+            fixed _Grayscale;
+
+            fixed4 sample_sprite_texture(float2 uv)
+            {
+                const fixed4 color = tex2D(_MainTex, uv);
+
+                // setting to 0.004 and 0.996 prevents getting wrong texture edge colors 
+                const fixed gradient_position = lerp(0.005, 0.995, saturate(color.r * 2 - 1));
+                const fixed4 gradient_map = tex2D(_GradientTex, fixed2(gradient_position, 0));
+
+                #if UNITY_TEXTURE_ALPHASPLIT_ALLOWED
+				if (_AlphaSplitEnabled)
+				{
+				    color.a = tex2D (_AlphaTex, uv).r;
+				}
+                #endif //UNITY_TEXTURE_ALPHASPLIT_ALLOWED
+
+                // choke starts at 0.1 higher than the gradient map threshold
+                // to allow a smoother color blending (see touch)
+                const fixed red_choke = smoothstep(0, 0.5, color.r);
+                
+                const fixed3 shadow_color = fixed3(color.b * _ShadowColor.rgb);
+                
+                fixed3 sum = gradient_map * red_choke + shadow_color * _ShadowColor.a * color.b;
+                sum = color.g.xxxx + sum * (1 - color.g);
+                
+                return fixed4(sum.rgb, color.a);
+            }
+
+            fixed4 frag(v2f IN) : SV_Target
+            {
+                fixed4 c = sample_sprite_texture(IN.texcoord);
+
+                //Rough human eye adjusted grayscale computation
+                const fixed mono_rgb = 0.299 * c.r + 0.587 * c.g + 0.114 * c.b;
+
+                c.rgb *= IN.color.rgb;
+
+                const fixed shine_multiplier = (sin(_Time.y * 16) * 0.5 + 0.5) * _Shine;
+                c.rgb += shine_multiplier.rrr * 0.2;
+                c.rgb *= 1 + shine_multiplier.rrr * 0.3;
+
+                const fixed3 out_color = lerp(c.rgb, mono_rgb.rrr, _Grayscale);
+                return fixed4(out_color, c.a * IN.color.a);
+            }
+            ENDCG
+        }
+    }
+}