new 功能 but new bug

Signed-off-by: TRAfoer <lhf190@outlook.com>

Assets/Shaders/PathNodeShader.shader

@@ -0,0 +1,57 @@
+Shader "Custom/PathNodeShader"
+{
+    Properties
+    {
+        _MainTex ("Texture", 2D) = "white" {}
+        _color ("color", Color)= (1,1,1,1)
+    }
+    SubShader
+    {
+        Tags { "Queue" = "Transparent+1000" "RenderType" = "Opaque" }     
+           LOD 100
+
+        Pass
+        {
+            ZTest Always
+            CGPROGRAM
+            #pragma vertex vert
+            #pragma fragment frag
+            // make fog work
+
+            #include "UnityCG.cginc"
+
+            struct appdata
+            {
+                float4 vertex : POSITION;
+                float2 uv : TEXCOORD0;
+            };
+
+            struct v2f
+            {
+                float2 uv : TEXCOORD0;
+               
+                float4 vertex : SV_POSITION;
+            };
+
+            sampler2D _MainTex;
+            float4 _MainTex_ST;
+            fixed4 _color;
+            v2f vert (appdata v)
+            {
+                v2f o;
+                o.vertex = UnityObjectToClipPos(v.vertex);
+                o.uv = TRANSFORM_TEX(v.uv, _MainTex);
+                return o;
+            }
+
+            fixed4 frag (v2f i) : SV_Target
+            {
+                // sample the texture
+                fixed4 col = _color;
+               
+                return col;
+            }
+            ENDCG
+        }
+    }
+}