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Giving MatCap_TextureAdd a black outline
I'm trying to give the MatCap_TextureAdd shader a black outline. I think half4 frag(v2f i) :COLOR { return i.color; } is what creates the outline. So I tried copying and pasting it into MatCap_TextureAdd's subshader. But no matter where I put it either I get an error or the outline doesn't appear at all. Is there a specific place within the subshader it needs to go or is there code already using something that half4 frag(v2f i) :COLOR { return i.color; } needs?
Shader "MatCap/Vertex/Textured Add"
{
Properties
{
_MainTex ("Base (RGB)", 2D) = "white" {}
_MatCap ("MatCap (RGB)", 2D) = "white" {}
}
Subshader
{
Tags { "RenderType"="Opaque" }
Pass
{
Tags { "LightMode" = "Always" }
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
#pragma fragmentoption ARB_precision_hint_fastest
#include "UnityCG.cginc"
struct v2f
{
float4 pos : SV_POSITION;
float2 uv : TEXCOORD0;
float2 cap : TEXCOORD1;
};
uniform float4 _MainTex_ST;
v2f vert (appdata_base v)
{
v2f o;
o.pos = mul (UNITY_MATRIX_MVP, v.vertex);
o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
half2 capCoord;
capCoord.x = dot(UNITY_MATRIX_IT_MV[0].xyz,v.normal);
capCoord.y = dot(UNITY_MATRIX_IT_MV[1].xyz,v.normal);
o.cap = capCoord * 0.5 + 0.5;
return o;
}
uniform sampler2D _MainTex;
uniform sampler2D _MatCap;
fixed4 frag (v2f i) : COLOR
{
fixed4 tex = tex2D(_MainTex, i.uv);
fixed4 mc = tex2D(_MatCap, i.cap);
return (tex + (mc*2.0)-1.0);
}
ENDCG
}
}
Fallback "VertexLit"
}
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