Create ColorCycle.shader

Author: unitycoder

Assets/Shaders/2D/Effects/ColorCycle.shader

@@ -0,0 +1,64 @@
+Shader "UnityLibrary/2D/Effects/ColorCycle"
+{
+	Properties
+	{
+		_MainTex ("Grayscale", 2D) = "white" {}
+		_GradientTex ("Gradient", 2D) = "white" {}
+		_Speed("Speed",float) = 1
+	}
+
+	SubShader
+	{
+		Tags { "RenderType"="Opaque" }
+		LOD 100
+
+		Pass
+		{
+			CGPROGRAM
+			#pragma vertex vert
+			#pragma fragment frag
+			
+			#include "UnityCG.cginc"
+
+			struct appdata
+			{
+				float4 vertex : POSITION;
+				float2 uv : TEXCOORD0;
+			};
+
+			struct v2f
+			{
+				float2 uv : TEXCOORD0;
+				float4 vertex : SV_POSITION;
+			};
+
+			sampler2D _MainTex;
+			sampler2D _GradientTex;
+			float4 _MainTex_ST;
+			float _Speed;
+
+			v2f vert (appdata v)
+			{
+				v2f o;
+				o.vertex = UnityObjectToClipPos(v.vertex);
+				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+				return o;
+			}
+			
+			fixed4 frag (v2f i) : SV_Target
+			{
+				// get (grayscale texture) pixel color
+				float gray = tex2D(_MainTex, i.uv).r;
+
+				// get scrolling
+				float scroll = frac(_Time.x*_Speed);
+
+				// get gradient color from texture
+				fixed4 col = tex2D(_GradientTex,float2(gray+scroll,0.5));
+
+				return col;
+			}
+			ENDCG
+		}
+	}
+}