I’m trying to make an outline shader that only shows outline from the model’s silhouette, to be used as indication that the character has been selected.
The current problem with this one is the outline doesn’t show in the feet, because of the offset, it gets hidden by the ground. The offset is there to get rid of outline lines that are not in the silhouette (i.e. protrusions facing the camera)
I want the outline to be above the terrain, but below the character. The queue tag doesn’t seem to work.
Shader "Outlined/Diffuse" {
Properties {
_Color ("Main Color", Color) = (.5,.5,.5,1)
_OutlineColor ("Outline Color", Color) = (0,0,0,1)
_Outline ("Outline width", Range (.002, 0.03)) = .005
_MainTex ("Base (RGB)", 2D) = "white" { }
}
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) {
// just make a copy of incoming vertex data but scaled according to normal direction
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
SubShader {
Tags {"Queue" = "Overlay" }
CGPROGRAM
#pragma surface surf Lambert
sampler2D _MainTex;
fixed4 _Color;
struct Input {
float2 uv_MainTex;
};
void surf (Input IN, inout SurfaceOutput o) {
fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
o.Albedo = c.rgb;
o.Alpha = c.a;
}
ENDCG
// note that a vertex shader is specified here but its using the one above
Pass {
Name "OUTLINE"
Tags { "LightMode" = "Always" }
Cull Front
ZWrite On
ZTest LEqual
ColorMask RGB
Blend SrcAlpha OneMinusSrcAlpha
Offset 15,15
CGPROGRAM
#pragma vertex vert
#pragma fragment frag
half4 frag(v2f i) :COLOR { return i.color; }
ENDCG
}
}
SubShader {
Tags {"Queue" = "Overlay" }
CGPROGRAM
#pragma surface surf Lambert
sampler2D _MainTex;
fixed4 _Color;
struct Input {
float2 uv_MainTex;
};
void surf (Input IN, inout SurfaceOutput o) {
fixed4 c = tex2D(_MainTex, IN.uv_MainTex) * _Color;
o.Albedo = c.rgb;
o.Alpha = c.a;
}
ENDCG
Pass {
Name "OUTLINE"
Tags { "LightMode" = "Always" }
Cull Front
ZWrite On
ColorMask RGB
Blend SrcAlpha OneMinusSrcAlpha
CGPROGRAM
#pragma vertex vert
#pragma exclude_renderers gles xbox360 ps3
ENDCG
SetTexture [_MainTex] { combine primary }
}
}
Fallback "Diffuse"
}
