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AbstractConcept 2022-09-13 00:36:34 -05:00
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11
Library/PackageCache/com.unity.2d.animation@3.2.6/Editor/SkinningModule/Triangulation/ITriangulator.cs Normal file
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using System.Collections.Generic;
using UnityEngine;
namespace UnityEditor.U2D.Animation
{
internal interface ITriangulator
{
void Triangulate(IList<Vector2> vertices, IList<Edge> edges, IList<int> indices);
void Tessellate(float minAngle, float maxAngle, float meshAreaFactor, float largestTriangleAreaFactor, int smoothIterations, IList<Vector2> vertices, IList<Edge> edges, IList<int> indices);
}
}

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Library/PackageCache/com.unity.2d.animation@3.2.6/Editor/SkinningModule/Triangulation/ITriangulator.cs.meta Normal file
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133
Library/PackageCache/com.unity.2d.animation@3.2.6/Editor/SkinningModule/Triangulation/TriangulationUtility.cs Normal file
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using UnityEngine;
using System.Collections.Generic;
using UnityEngine.U2D.Animation.TriangleNet.Geometry;
using UnityEngine.U2D.Animation.TriangleNet.Meshing;
using UnityEngine.U2D.Animation.TriangleNet.Smoothing;
using UnityEngine.U2D.Animation.TriangleNet.Tools;
namespace UnityEditor.U2D.Animation
{
internal class TriangulationUtility
{
public static void Triangulate(IList<Vector2> vertices, IList<Edge> edges, IList<int> indices)
{
indices.Clear();
if (vertices.Count < 3)
return;
var polygon = new Polygon(vertices.Count);
for (int i = 0; i < vertices.Count; ++i)
{
Vector2 position = vertices[i];
polygon.Add(new Vertex(position.x, position.y, 1));
}
for (int i = 0; i < edges.Count; ++i)
{
Edge edge = edges[i];
polygon.Add(new Segment(polygon.Points[edge.index1], polygon.Points[edge.index2]));
}
var mesh = polygon.Triangulate();
foreach (ITriangle triangle in mesh.Triangles)
{
int id0 = triangle.GetVertexID(0);
int id1 = triangle.GetVertexID(1);
int id2 = triangle.GetVertexID(2);
if (id0 < 0 || id1 < 0 || id2 < 0 || id0 >= vertices.Count || id1 >= vertices.Count || id2 >= vertices.Count)
continue;
indices.Add(id0);
indices.Add(id2);
indices.Add(id1);
}
}
public static void Tessellate(float minAngle, float maxAngle, float meshAreaFactor, float largestTriangleAreaFactor, int smoothIterations, IList<Vector2> vertices, IList<Edge> edges, IList<int> indices)
{
if (vertices.Count < 3)
return;
largestTriangleAreaFactor = Mathf.Clamp01(largestTriangleAreaFactor);
var polygon = new Polygon(vertices.Count);
for (int i = 0; i < vertices.Count; ++i)
{
Vector2 position = vertices[i];
polygon.Add(new Vertex(position.x, position.y, 1));
}
for (int i = 0; i < edges.Count; ++i)
{
Edge edge = edges[i];
polygon.Add(new Segment(polygon.Points[edge.index1], polygon.Points[edge.index2]));
}
var mesh = polygon.Triangulate();
var statistic = new Statistic();
statistic.Update((UnityEngine.U2D.Animation.TriangleNet.Mesh)mesh, 1);
if (statistic.LargestArea < 0.01f)
throw new System.Exception("Invalid Mesh: Largest triangle area too small");
var maxAreaToApply = (double)Mathf.Max((float)statistic.LargestArea * largestTriangleAreaFactor, (float)(statistic.MeshArea * meshAreaFactor));
var qualityOptions = new QualityOptions() { SteinerPoints = 0 };
if (maxAreaToApply > 0f)
qualityOptions.MaximumArea = maxAreaToApply;
qualityOptions.MinimumAngle = minAngle;
qualityOptions.MaximumAngle = maxAngle;
mesh.Refine(qualityOptions, false);
mesh.Renumber();
if (smoothIterations > 0)
{
try
{
var smoother = new SimpleSmoother();
smoother.Smooth(mesh, smoothIterations);
}
catch (System.Exception)
{
Debug.Log(TextContent.smoothMeshError);
}
}
vertices.Clear();
edges.Clear();
indices.Clear();
foreach (Vertex vertex in mesh.Vertices)
{
vertices.Add(new Vector2((float)vertex.X, (float)vertex.Y));
}
foreach (ISegment segment in mesh.Segments)
{
edges.Add(new Edge(segment.P0, segment.P1));
}
foreach (ITriangle triangle in mesh.Triangles)
{
int id0 = triangle.GetVertexID(0);
int id1 = triangle.GetVertexID(1);
int id2 = triangle.GetVertexID(2);
if (id0 < 0 || id1 < 0 || id2 < 0 || id0 >= vertices.Count || id1 >= vertices.Count || id2 >= vertices.Count)
continue;
indices.Add(id0);
indices.Add(id2);
indices.Add(id1);
}
}
}
}

11
Library/PackageCache/com.unity.2d.animation@3.2.6/Editor/SkinningModule/Triangulation/TriangulationUtility.cs.meta Normal file
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19
Library/PackageCache/com.unity.2d.animation@3.2.6/Editor/SkinningModule/Triangulation/Triangulator.cs Normal file
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using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace UnityEditor.U2D.Animation
{
internal class Triangulator : ITriangulator
{
public void Triangulate(IList<Vector2> vertices, IList<Edge> edges, IList<int> indices)
{
TriangulationUtility.Triangulate(vertices, edges, indices);
}
public void Tessellate(float minAngle, float maxAngle, float meshAreaFactor, float largestTriangleAreaFactor, int smoothIterations, IList<Vector2> vertices, IList<Edge> edges, IList<int> indices)
{
TriangulationUtility.Tessellate(minAngle, maxAngle, meshAreaFactor, largestTriangleAreaFactor, smoothIterations, vertices, edges, indices);
}
}
}

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Library/PackageCache/com.unity.2d.animation@3.2.6/Editor/SkinningModule/Triangulation/Triangulator.cs.meta Normal file
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