去掉obi，使用自写绳索

Assets/Obi/Scripts/Common/Backends/Burst/DataStructures/ConstraintBatcher/BatchLUT.cs

@@ -1,49 +0,0 @@
-#if (OBI_BURST && OBI_MATHEMATICS && OBI_COLLECTIONS)
-using System;
-using UnityEngine;
-using Unity.Collections;
-
-namespace Obi
-{
-    public struct BatchLUT : IDisposable
-    {
-        public readonly int numBatches;
-        public readonly NativeArray<ushort> batchIndex;
-
-        public BatchLUT(int numBatches)
-        {
-            this.numBatches = numBatches;
-
-            batchIndex = new NativeArray<ushort>(UInt16.MaxValue + 1, Allocator.Persistent, NativeArrayOptions.ClearMemory);
-            const ushort end = UInt16.MaxValue;
-            ushort numBits = (ushort)(numBatches - 1);
-
-            // For each entry in the table, compute the position of the first '0' bit in the index, starting from the less significant bit.
-            // This is the index of the first batch where we can add the constraint to.
-
-            for (ushort value = 0; value < end; value++)
-            {
-                ushort valueCopy = value;
-                for (ushort i = 0; i < numBits; i++)
-                {
-                    if ((valueCopy & 1) == 0)
-                    {
-                        batchIndex[value] = i;
-                        break;
-                    }
-                    valueCopy >>= 1;
-                }
-
-            }
-
-            batchIndex[end] = numBits;
-        }
-
-        public void Dispose()
-        {
-            batchIndex.Dispose();
-        }
-    }
-    
-}
-#endif