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Assets/BITKit/Unity/Shader/WireframeURP.shader

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+Shader "Custom/WireframeURP"
+{
+    Properties
+    {
+        _MainTex ("Texture", 2D) = "white" {}
+        _LineColor("Line Color", Color) = (1, 1, 1, 1)
+        _BGColor("Background Color", Color) = (0, 0, 0, 0)
+        _LineWidth("Line Width", Range(0,0.1)) = 0.005
+    }
+
+    SubShader
+    {
+        Tags { "RenderType"="Opaque" }
+        LOD 100
+
+        Pass
+        {
+            Name "Wireframe"
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            #pragma target 3.0
+            #include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+                float3 barycentric : TEXCOORD0; // Barycentric coordinates for wireframe
+            };
+
+            struct v2f
+            {
+                float2 uv : TEXCOORD0;
+                float3 barycentric : TEXCOORD1;
+                float4 vertex : SV_POSITION;
+            };
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+            float4 _LineColor;
+            float4 _BGColor;
+            float _LineWidth;
+
+            v2f vert (appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                o.uv = v.barycentric.xy;
+                o.barycentric = v.barycentric;
+                return o;
+            }
+
+            half4 frag (v2f i) : SV_Target
+            {
+                half3 bary = i.barycentric;
+                bary = fwidth(bary) * _LineWidth + bary;
+                half mask = step(1, abs(bary.x) + abs(bary.y) + abs(bary.z));
+                half4 col = lerp(_LineColor, _BGColor, mask);
+                return col;
+            }
+            ENDCG
+        }
+    }
+}