Unity2D_线框材质

一.这个好像是以UV分隔

Shader "Custom/Wireframe"
{
    Properties
    {
            _Color("Color",Color) = (1.0,1.0,1.0,1.0)
            _EdgeColor("Edge Color",Color) = (1.0,1.0,1.0,1.0)
            _Width("Width",Range(0,1)) = 0.2
    }
        SubShader
    {
            Tags
        {
            "Queue" = "Transparent"
            "IgnoreProjector" = "True"
            "RenderType" = "Transparent"
            }
            Blend SrcAlpha OneMinusSrcAlpha
            LOD 200
            Cull Front
            zWrite off
            Pass {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma target 3.0
            #include "UnityCG.cginc"

            struct a2v {
                half4 uv : TEXCOORD0;
                half4 vertex : POSITION;
            };

            struct v2f {
                half4 pos : SV_POSITION;
                half4 uv : TEXCOORD0;
            };
            fixed4 _Color;
            fixed4 _EdgeColor;
            float _Width;

            v2f vert(a2v v)
            {
                v2f o;
                o.uv = v.uv;
                o.pos = UnityObjectToClipPos(v.vertex);
                return o;
            }


            fixed4 frag(v2f i) : COLOR
            {
                fixed4 col;
                float lx = step(_Width, i.uv.x);
                float ly = step(_Width, i.uv.y);
                float hx = step(i.uv.x, 1.0 - _Width);
                float hy = step(i.uv.y, 1.0 - _Width);
                col = lerp(_EdgeColor, _Color, lx * ly * hx * hy);
                return col;
            }
            ENDCG
            }
            Blend SrcAlpha OneMinusSrcAlpha
            LOD 200
            Cull Back
            zWrite off
            Pass {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #pragma target 3.0
            #include "UnityCG.cginc"

            struct a2v
            {
                half4 uv : TEXCOORD0;
                half4 vertex : POSITION;
            };

            struct v2f
            {
                half4 pos : SV_POSITION;
                half4 uv : TEXCOORD0;
            };
            fixed4 _Color;
            fixed4 _EdgeColor;
            float _Width;

            v2f vert(a2v v)
            {
                v2f o;
                o.uv = v.uv;
                o.pos = UnityObjectToClipPos(v.vertex);
                return o;
            }


            fixed4 frag(v2f i) : COLOR
            {
                fixed4 col;
                float lx = step(_Width, i.uv.x);
                float ly = step(_Width, i.uv.y);
                float hx = step(i.uv.x, 1.0 - _Width);
                float hy = step(i.uv.y, 1.0 - _Width);
                col = lerp(_EdgeColor, _Color, lx * ly * hx * hy);
                return col;
            }
            ENDCG
            }
    }
        FallBack "Diffuse"
}

二.以顶点连线分隔

在Unity资源商店里就有:UCLA Wireframe Shader

参考：Unity Shader物体线框https://www.cnblogs.com/Haha1999/p/15662830.html