Shader "Custom/Effect" {
	Properties {
		_MainTex ("Base (RGB)", 2D) = "white" {}
		_Color ("Main Color", Color) = (1,1,1,1)
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200

		CGPROGRAM
		#pragma surface surf Lambert

		sampler2D _MainTex;
		float4 EffectOrigin;
		float Distance;
		float4 _Color;
		float4 AltColor;

		struct Input {
			float2 uv_MainTex;
			float3 worldPos;
		};

		void surf (Input IN, inout SurfaceOutput o) {
			float dist = distance(IN.worldPos, EffectOrigin);
			float f = saturate(sign(Distance - dist));
			half4 c = tex2D (_MainTex, IN.uv_MainTex);
			o.Albedo = ((1-f) * (c.rgb  * _Color)) + ((f) * (c.rgb  * AltColor));
			o.Alpha = c.a;
		}
		ENDCG
	}
	FallBack "Diffuse"
}