86 lines
1.8 KiB
C#
86 lines
1.8 KiB
C#
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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 RoR2;
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public class WireMeshBuilder : IDisposable
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{
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private struct LineVertex
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{
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public Vector3 position;
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public Color color;
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}
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private int uniqueVertexCount;
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private Dictionary<LineVertex, int> uniqueVertexToIndex = new Dictionary<LineVertex, int>();
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private List<int> indices = new List<int>();
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private List<Vector3> positions = new List<Vector3>();
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private List<Color> colors = new List<Color>();
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private int GetVertexIndex(LineVertex vertex)
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{
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if (!uniqueVertexToIndex.TryGetValue(vertex, out var value))
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{
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value = uniqueVertexCount++;
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positions.Add(vertex.position);
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colors.Add(vertex.color);
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uniqueVertexToIndex.Add(vertex, value);
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}
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return value;
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}
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public void Clear()
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{
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uniqueVertexToIndex.Clear();
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indices.Clear();
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positions.Clear();
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colors.Clear();
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uniqueVertexCount = 0;
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}
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public void AddLine(Vector3 p1, Color c1, Vector3 p2, Color c2)
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{
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LineVertex lineVertex = default(LineVertex);
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lineVertex.position = p1;
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lineVertex.color = c1;
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LineVertex vertex = lineVertex;
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lineVertex = default(LineVertex);
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lineVertex.position = p2;
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lineVertex.color = c2;
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LineVertex vertex2 = lineVertex;
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int vertexIndex = GetVertexIndex(vertex);
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int vertexIndex2 = GetVertexIndex(vertex2);
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indices.Add(vertexIndex);
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indices.Add(vertexIndex2);
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}
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public Mesh GenerateMesh()
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{
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Mesh mesh = new Mesh();
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GenerateMesh(mesh);
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return mesh;
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}
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public void GenerateMesh(Mesh dest)
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{
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dest.SetTriangles(Array.Empty<int>(), 0);
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dest.SetVertices(positions);
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dest.SetColors(colors);
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dest.SetIndices(indices.ToArray(), MeshTopology.Lines, 0);
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}
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public void Dispose()
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{
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uniqueVertexToIndex = null;
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indices = null;
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positions = null;
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colors = null;
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}
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}
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