去掉obi，使用自写绳索
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@@ -1,171 +0,0 @@
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using System;
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using System.Collections.Generic;
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using UnityEngine;
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namespace Obi
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{
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public struct Triangle : IBounded
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{
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public int i1;
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public int i2;
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public int i3;
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Aabb b;
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public Triangle(int i1, int i2, int i3, Vector3 v1, Vector3 v2, Vector3 v3)
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{
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this.i1 = i1;
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this.i2 = i2;
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this.i3 = i3;
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b = new Aabb(v1);
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b.Encapsulate(v2);
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b.Encapsulate(v3);
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}
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public Aabb GetBounds()
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{
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return b;
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}
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}
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public class ObiTriangleMeshHandle : ObiResourceHandle<Mesh>
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{
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public ObiTriangleMeshHandle(Mesh mesh, int index = -1) : base(index) { owner = mesh; }
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}
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public struct TriangleMeshHeader //we need to use the header in the backend, so it must be a struct.
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{
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public int firstNode;
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public int nodeCount;
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public int firstTriangle;
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public int triangleCount;
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public int firstVertex;
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public int vertexCount;
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public TriangleMeshHeader(int firstNode, int nodeCount, int firstTriangle, int triangleCount, int firstVertex, int vertexCount)
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{
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this.firstNode = firstNode;
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this.nodeCount = nodeCount;
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this.firstTriangle = firstTriangle;
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this.triangleCount = triangleCount;
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this.firstVertex = firstVertex;
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this.vertexCount = vertexCount;
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}
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}
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public class ObiTriangleMeshContainer
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{
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public Dictionary<Mesh,ObiTriangleMeshHandle> handles; /**< dictionary indexed by mesh, so that we don't generate data for the same mesh multiple times.*/
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public ObiNativeTriangleMeshHeaderList headers; /**< One header per mesh.*/
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public ObiNativeBIHNodeList bihNodes;
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public ObiNativeTriangleList triangles;
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public ObiNativeVector3List vertices;
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public ObiTriangleMeshContainer()
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{
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handles = new Dictionary<Mesh, ObiTriangleMeshHandle>();
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headers = new ObiNativeTriangleMeshHeaderList();
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bihNodes = new ObiNativeBIHNodeList();
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triangles = new ObiNativeTriangleList();
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vertices = new ObiNativeVector3List();
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}
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public ObiTriangleMeshHandle GetOrCreateTriangleMesh(Mesh source)
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{
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ObiTriangleMeshHandle handle = new ObiTriangleMeshHandle(null);
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if (source != null && !handles.TryGetValue(source, out handle))
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{
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if (source.isReadable)
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{
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var sourceTris = source.triangles;
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var sourceVertices = source.vertices;
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// Build a bounding interval hierarchy from the triangles:
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IBounded[] t = new IBounded[sourceTris.Length / 3];
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for (int i = 0; i < t.Length; ++i)
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{
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int t1 = sourceTris[i * 3];
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int t2 = sourceTris[i * 3 + 1];
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int t3 = sourceTris[i * 3 + 2];
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t[i] = new Triangle(t1, t2, t3, sourceVertices[t1], sourceVertices[t2], sourceVertices[t3]);
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}
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var sourceBih = BIH.Build(ref t);
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Triangle[] tris = Array.ConvertAll(t, x => (Triangle)x);
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handle = new ObiTriangleMeshHandle(source, headers.count);
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handles.Add(source, handle);
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headers.Add(new TriangleMeshHeader(bihNodes.count, sourceBih.Length, triangles.count, tris.Length, vertices.count, sourceVertices.Length));
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bihNodes.AddRange(sourceBih);
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triangles.AddRange(tris);
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vertices.AddRange(sourceVertices);
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}
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else
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{
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handle = new ObiTriangleMeshHandle(source);
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handles.Add(source, handle);
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}
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}
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return handle;
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}
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public void DestroyTriangleMesh(ObiTriangleMeshHandle handle)
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{
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if (handle != null && handle.isValid && handle.index < handles.Count)
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{
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var header = headers[handle.index];
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// Update headers:
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for (int i = 0; i < headers.count; ++i)
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{
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var h = headers[i];
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if (h.firstTriangle > header.firstTriangle)
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{
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h.firstNode -= header.nodeCount;
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h.firstTriangle -= header.triangleCount;
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h.firstVertex -= header.vertexCount;
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headers[i] = h;
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}
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}
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// update handles:
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foreach (var pair in handles)
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{
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if (pair.Value.index > handle.index)
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pair.Value.index --;
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}
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// Remove nodes, triangles and vertices
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bihNodes.RemoveRange(header.firstNode, header.nodeCount);
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triangles.RemoveRange(header.firstTriangle, header.triangleCount);
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vertices.RemoveRange(header.firstVertex, header.vertexCount);
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// remove header:
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headers.RemoveAt(handle.index);
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// remove the mesh from the dictionary:
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handles.Remove(handle.owner);
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// Invalidate our handle:
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handle.Invalidate();
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}
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}
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public void Dispose()
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{
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if (headers != null)
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headers.Dispose();
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if (triangles != null)
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triangles.Dispose();
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if (vertices != null)
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vertices.Dispose();
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if (bihNodes != null)
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bihNodes.Dispose();
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}
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}
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}
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