Unity3D带自发光及边缘高光的shader

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;
};

uniform float _Outline;
uniform float4 _OutlineColor;

v2f vert(appdata v) {
v2f o;
o.pos = mul(UNITY_MATRIX_MVP, 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"
}