[Unity][Unity特效]3D物体遮挡描边

Outlined/Silhouette Only.shader(参考文章1，2)

Shader "Outlined/Silhouette Only"
	{
	Properties
		{
		_OutlineColor("Outline Color", Color) = (0,0,0,1)
		_Outline("Outline width", Range(0.0, 0.03)) = .005
		}

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

		o.pos.xy += offset * o.pos.z * _Outline;//o.pos.xy += offset * _Outline;
		o.color = _OutlineColor;

		return o;
		}
	ENDCG

	SubShader
		{
		Tags { "Queue" = "Transparent" }

		Pass
			{
			Name "BASE"
			CULL OFF
			ZTEST ALWAYS
			ZWRITE OFF
			Blend ONE ONE

			Stencil
				{
				REF 2
				COMP ALWAYS
				PASS REPLACE
				ZFAIL REPLACE
				}

			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag

			half4 frag(v2f i) :COLOR
				{
				return half4(0,0,0,0);
				}
			ENDCG
			}

		Pass
			{
			Name "INNER"
			CULL OFF
			ZTEST ALWAYS
			ZWRITE OFF
			Blend One One

			Stencil
				{
				REF 1
				COMP ALWAYS
				PASS REPLACE
				ZFAIL REPLACE
				}

			CGPROGRAM
			#pragma vertex vert2
			#pragma fragment frag
				v2f vert2(appdata v)
				{
				v2f o;
				o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
				o.color = _OutlineColor;
				return o;
				}

			half4 frag(v2f i) :COLOR
				{
				return half4(0,0,0,0);
				}
			ENDCG
			}

		Pass
			{
			Name "OUTLINE"
			CULL OFF
			ZTEST ALWAYS
			ZWRITE OFF
			BLEND ONE ONEMINUSDSTCOLOR

			Stencil
				{
				REF 2
				COMP EQUAL
				PASS REPLACE
				ZFAIL REPLACE
				}

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

相关文章：

1.

[Unity插件]3D模型透明描边插件

2.

[Unity插件]Outline3D2D物体描边插件的使用说明

3.

4.

参考文章：

1.

OUTLINES (INCLUDES SHADER)

2.Shader download link.

3.

4.