去掉obi，使用自写绳索

Assets/Obi/Editor/Resources/PaddingShader.shader

@@ -1,81 +0,0 @@
-Shader "Obi/PaddingShader"
-{
-	Properties
-	{
-		_MainTex ("Texture", 2D) = "white" {}
-        _Padding ("Paddding", Int) = 32
-	}
-	SubShader
-	{
-		// No culling or depth
-		Cull Off ZWrite Off ZTest Always
-
-		Pass
-		{
-			CGPROGRAM
-			#pragma vertex vert
-			#pragma fragment frag
-			
-			#include "UnityCG.cginc"
-
-			struct appdata
-			{
-				float4 vertex : POSITION;
-				float2 uv : TEXCOORD0;
-			};
-
-			struct v2f
-			{
-				float2 uv : TEXCOORD0;
-				float4 vertex : SV_POSITION;
-			};
-
-			v2f vert (appdata v)
-			{
-				v2f o;
-				o.vertex = UnityObjectToClipPos(v.vertex);
-				o.uv = v.uv;
-				return o;
-			}
-			
-			sampler2D _MainTex;
-            float4 _MainTex_TexelSize;
-            int _Padding;
-            static const float2 offsets[8] = {float2(-1,0), float2(1,0), float2(0,1), float2(0,-1), float2(-1,1), float2(1,1), float2(1,-1), float2(-1,-1)};
-
-			fixed4 frag (v2f i) : SV_Target
-			{
-            
-                fixed4 sample = tex2D(_MainTex, i.uv);
-
-                if (sample.a > 0) 
-                    return sample;
-
-                fixed4 minSample = sample;
-                float minDist = 99999999;
-
-                for  (int k = 1; k < _Padding; ++k)
-                {
-                    for  (int j = 0; j < 8; ++j)
-                    {
-                        float2 offsetUV = i.uv + offsets[j] * _MainTex_TexelSize.xy * k;
-                        fixed4 offsetSample = tex2Dlod(_MainTex, float4(offsetUV.xy,0,0));
-
-                        if (offsetSample.a > 0) 
-                        {
-                            float dist = length(i.uv - offsetUV);
-                            if (dist < minDist)
-                            {
-                                minDist = dist;
-                                minSample = offsetSample;
-                            }
-                        }
-                    }
-                }
-
-                return minSample;
-			}
-			ENDCG
-		}
-	}
-}