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Question by
AntoineProvost · Mar 02, 2021 at 05:05 PM ·
shaderoutlinealpha-channel
Add alpha detection to outline shader
Hi all,
I'm currently working on a project using the free outline shader made by Chris Nolet : https://assetstore.unity.com/packages/tools/particles-effects/quick-outline-115488
But it seems there is no pass for the alpha detection. There is a script that call two shaders and I was wondering if somebody would know how to add alpha detection to this ?
//
// OutlineFill.shader
// QuickOutline
//
// Created by Chris Nolet on 2/21/18.
// Copyright © 2018 Chris Nolet. All rights reserved.
//
Shader "Custom/Outline Fill" {
Properties {
[Enum(UnityEngine.Rendering.CompareFunction)] _ZTest("ZTest", Float) = 0
_OutlineColor("Outline Color", Color) = (1, 1, 1, 1)
_OutlineWidth("Outline Width", Range(0, 10)) = 2
}
SubShader {
Tags {
"Queue" = "Transparent+110"
"RenderType" = "Transparent"
"DisableBatching" = "True"
}
Pass {
Name "Fill"
Cull Off
ZTest [_ZTest]
ZWrite Off
Blend SrcAlpha OneMinusSrcAlpha
ColorMask RGB
Stencil {
Ref 1
Comp NotEqual
}
CGPROGRAM
#include "UnityCG.cginc"
#pragma vertex vert
#pragma fragment frag
struct appdata {
float4 vertex : POSITION;
float3 normal : NORMAL;
float3 smoothNormal : TEXCOORD3;
UNITY_VERTEX_INPUT_INSTANCE_ID
};
struct v2f {
float4 position : SV_POSITION;
fixed4 color : COLOR;
UNITY_VERTEX_OUTPUT_STEREO
};
uniform fixed4 _OutlineColor;
uniform float _OutlineWidth;
v2f vert(appdata input) {
v2f output;
UNITY_SETUP_INSTANCE_ID(input);
UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(output);
float3 normal = any(input.smoothNormal) ? input.smoothNormal : input.normal;
float3 viewPosition = UnityObjectToViewPos(input.vertex);
float3 viewNormal = normalize(mul((float3x3)UNITY_MATRIX_IT_MV, normal));
output.position = UnityViewToClipPos(viewPosition + viewNormal * -viewPosition.z * _OutlineWidth / 1000.0);
output.color = _OutlineColor;
return output;
}
fixed4 frag(v2f input) : SV_Target {
return input.color;
}
ENDCG
}
}
}
//
// OutlineMask.shader
// QuickOutline
//
// Created by Chris Nolet on 2/21/18.
// Copyright © 2018 Chris Nolet. All rights reserved.
//
Shader "Custom/Outline Mask" {
Properties {
[Enum(UnityEngine.Rendering.CompareFunction)] _ZTest("ZTest", Float) = 0
}
SubShader {
Tags {
"Queue" = "Transparent+100"
"RenderType" = "Transparent"
}
Pass {
Name "Mask"
Cull Off
ZTest [_ZTest]
ZWrite Off
ColorMask 0
Stencil {
Ref 1
Pass Replace
}
}
}
}
And
//
// OutlineMask.shader
// QuickOutline
//
// Created by Chris Nolet on 2/21/18.
// Copyright © 2018 Chris Nolet. All rights reserved.
//
Shader "Custom/Outline Mask" {
Properties {
[Enum(UnityEngine.Rendering.CompareFunction)] _ZTest("ZTest", Float) = 0
}
SubShader {
Tags {
"Queue" = "Transparent+100"
"RenderType" = "Transparent"
}
Pass {
Name "Mask"
Cull Off
ZTest [_ZTest]
ZWrite Off
ColorMask 0
Stencil {
Ref 1
Pass Replace
}
}
}
}
Many thanks !
Antoine
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