Shader "Custom/Ill_RimLight"
{
	Properties{
		_Color("Main Color", Color) = (.5,.5,.5,1)
		_OutlineColor("Rim Color", Color) = (0,0,0,1)
		_Outline("Rim width", Range(.002, 0.03)) = .005
		_MainTex("Base (RGB)", 2D) = "white" { }
		_Illum("Illumin (A)", 2D) = "white" { }
		_EmissionLM("Emission (Lightmapper)", Float) = 0
	}

		SubShader
		{

			Tags { "RenderType" = "Opaque" }
			LOD 200

			CGPROGRAM
			#pragma surface surf Lambert

			sampler2D _MainTex;
			sampler2D _Illum;
			fixed4 _Color;

			struct Input {
				float2 uv_MainTex;
				float2 uv_Illum;
			};

			void surf(Input IN, inout SurfaceOutput o) {
				fixed4 tex = tex2D(_MainTex, IN.uv_MainTex);
				fixed4 c = tex * _Color;
				o.Albedo = c.rgb;
				o.Emission = c.rgb * tex2D(_Illum, IN.uv_Illum).a;
				o.Alpha = c.a;
			}
			ENDCG

			Pass
			{
				CGINCLUDE
				#include "UnityCG.cginc"

				struct appdata {
					float4 vertex : POSITION;
					float3 normal : NORMAL;
				};

				struct v2f {
					float4 pos : POSITION;
					float4 color : COLOR;
				};

				float _Outline;
				fixed4 _OutlineColor;

				v2f vert(appdata v) {
					v2f o;
					o.pos = UnityObjectToClipPos(v.vertex);

					float3 norm = mul((float3x3)UNITY_MATRIX_IT_MV, v.normal);
					float2 offset = TransformViewToProjection(norm.xy);

					o.pos.xy += offset * o.pos.z * _Outline;
					o.color = _OutlineColor;
					return o;
				}
				ENDCG

				Name "OUTLINE"
				Tags { "LightMode" = "Always" }
				Cull Front
				ZWrite On
				ColorMask RGB
				Blend SrcAlpha OneMinusSrcAlpha

				CGPROGRAM
				#pragma vertex vert
				#pragma fragment frag
				half4 frag(v2f i) :COLOR { return i.color; }
				ENDCG
			}
		}

			Fallback "Self-Illumin/VertexLit"
}