去掉obi，使用自写绳索

Assets/Obi/Editor/Resources/EditorParticle.shader

@@ -1,60 +0,0 @@
-Shader "Obi/EditorPoint"
-{
-    SubShader
-    {
-        Blend One OneMinusSrcAlpha
-        ZWrite Off
-        ZTest always 
-        Cull Back 
- 
-        Pass
-        {
-            CGPROGRAM
-            #pragma vertex vert
-            #pragma fragment frag
-         
-            #include "UnityCG.cginc"
- 
-            struct appdata
-            {
-                float4 vertex : POSITION;
-                float3 corner   : NORMAL;
-                fixed4 color    : COLOR;
-                float4 t0 : TEXCOORD0; // ellipsoid t1 vector
-            };
- 
-            struct v2f
-            {
-                float4 pos : SV_POSITION;
-                fixed4 color    : COLOR;
-                float2 texcoord : TEXCOORD0;
-            };
-         
-            v2f vert (appdata v)
-            {
-                v2f o;
-                
-                // particle positions are passed in world space, no need to use modelview matrix, just view.
-                float radius = v.t0.w * distance(mul(unity_ObjectToWorld, v.vertex), _WorldSpaceCameraPos);
-                float4 viewpos = mul(UNITY_MATRIX_V, v.vertex) + float4(v.corner.x, v.corner.y, 0, 0) * radius;
-                o.pos = mul(UNITY_MATRIX_P, viewpos); 
-
-                o.texcoord = float3(v.corner.x*0.5, v.corner.y*0.5, radius);
-                o.color = v.color;
-
-                return o;
-            }
- 
-            fixed4 frag (v2f i) : SV_Target
-            {
-                // antialiased circle:
-                float dist = length(i.texcoord);
-                float pwidth = fwidth(dist);
-                float alpha = i.color.a * saturate((0.5 - dist) / pwidth);
-                
-                return fixed4(i.color.rgb * alpha, alpha);
-            }
-            ENDCG
-        }
-    }
-}