去掉obi，使用自写绳索

Assets/Obi/Editor/Resources/TopologyBorders.shader

@@ -1,54 +0,0 @@
-// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
-
-
-Shader "Obi/TopologyBorders" {
-Properties {
-	_Color ("Main Color", Color) = (1,1,1,1)
-}
-
-SubShader {
-	Tags { "RenderType"="Opaque" }
-	LOD 100
-	
-	Pass {  
-
-		ZWrite Off 
-		ZTest always 
-		Cull Off 
-		Fog { Mode Off }
-
-		CGPROGRAM
-			#pragma vertex vert
-			#pragma fragment frag
-			#pragma multi_compile_fog
-			
-			#include "UnityCG.cginc"
-
-			struct appdata_t {
-				float4 vertex : POSITION;
-			};
-
-			struct v2f {
-				float4 vertex : SV_POSITION;
-			};
-
-			fixed4 _Color;
-			
-			v2f vert (appdata_t v)
-			{
-				v2f o;
-				o.vertex = UnityObjectToClipPos(v.vertex);
-				return o;
-			}
-			
-			fixed4 frag (v2f i) : COLOR
-			{
-				fixed4 col = _Color;
-				UNITY_OPAQUE_ALPHA(col.a);
-				return col;
-			}
-		ENDCG
-	}
-}
-
-}