46 lines
1.3 KiB
C#
46 lines
1.3 KiB
C#
using System.Collections.Generic;
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using Unity.Collections;
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using UnityEngine;
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internal struct VertexDictionary
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{
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static Dictionary<Vector3, int> m_VertexDictionary = new Dictionary<Vector3, int>();
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#if UNITY_EDITOR
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[RuntimeInitializeOnLoadMethod]
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static void ResetStaticsOnLoad()
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{
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m_VertexDictionary.Clear();
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}
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#endif
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public NativeArray<int> GetIndexRemap(NativeArray<Vector3> vertices, NativeArray<int> indices)
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{
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// Create a mapping to unique vertices
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NativeArray<int> vertexMapping = new NativeArray<int>(vertices.Length, Allocator.Temp);
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m_VertexDictionary.Clear();
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m_VertexDictionary.EnsureCapacity(vertices.Length);
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for (int i = 0; i < vertices.Length; i++)
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{
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Vector3 vertex = vertices[i];
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if (!m_VertexDictionary.ContainsKey(vertex))
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{
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vertexMapping[i] = i;
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m_VertexDictionary.Add(vertex, i);
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}
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else
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{
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vertexMapping[i] = m_VertexDictionary[vertex];
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}
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}
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NativeArray<int> remappedIndices = new NativeArray<int>(indices.Length, Allocator.Temp);
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for (int i = 0; i < indices.Length; i++)
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{
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remappedIndices[i] = vertexMapping[indices[i]];
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}
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return remappedIndices;
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}
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}
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