static ITriangulator TriangulatorForType(TriangulatorType triangulator)
{
switch (triangulator)
{
case TriangulatorType.Incremental: return(new Incremental());
case TriangulatorType.Dwyer: return(new Dwyer());
case TriangulatorType.SweepLine: return(new SweepLine());
default: return(new Dwyer());
}
}
public static UnityEngine.Mesh Mesh(this EPPZ.Geometry.Model.Polygon this_, Color color, TriangulatorType triangulator, string name = "")
{
// Create geometry.
TriangleNet.Geometry.Polygon polygon = this_.TriangleNetPolygon();
// Triangulate.
ConstraintOptions options = new ConstraintOptions();
// ConformingDelaunay
// Convex
// SegmentSplitting
QualityOptions quality = new QualityOptions();
// MinimumAngle
// MaximumArea
// UserTest
// VariableArea
// SteinerPoints
IMesh triangulatedMesh = polygon.Triangulate(options, quality, TriangulatorForType(triangulator));
// Counts.
int vertexCount = triangulatedMesh.Vertices.Count;
int triangleCount = triangulatedMesh.Triangles.Count;
// Mesh store.
Vector3[] _vertices = new Vector3[vertexCount];
Vector2[] _uv = new Vector2[vertexCount];
Vector3[] _normals = new Vector3[vertexCount];
Color[] _colors = new Color[vertexCount];
List <int> _triangles = new List <int>(); // Size may vary
// Vertices.
int index = 0;
foreach (TriangleNet.Geometry.Vertex eachVertex in triangulatedMesh.Vertices)
{
_vertices[index] = new Vector3(
(float)eachVertex.X,
(float)eachVertex.Y,
0.0f // As of 2D
);
_uv[index] = _vertices[index];
_normals[index] = Vector3.forward;
_colors[index] = color;
index++;
}
// Triangles.
foreach (TriangleNet.Topology.Triangle eachTriangle in triangulatedMesh.Triangles)
{
// Get vertices.
Point P2 = eachTriangle.GetVertex(2);
Point P1 = eachTriangle.GetVertex(1);
Point P0 = eachTriangle.GetVertex(0);
// Get centroid.
Vector2 centroid = new Vector2(
(float)(P2.X + P1.X + P0.X) / 3.0f,
(float)(P2.Y + P1.Y + P0.Y) / 3.0f
);
// Add only if centroid contained.
if (this_.ContainsPoint(centroid) || skipCentroidTest)
{
_triangles.Add(P2.ID);
_triangles.Add(P1.ID);
_triangles.Add(P0.ID);
}
}
// Create / setup mesh.
Mesh mesh = new Mesh();
mesh.vertices = _vertices;
mesh.uv = _uv;
mesh.normals = _normals;
mesh.colors = _colors;
mesh.subMeshCount = 1;
mesh.SetTriangles(_triangles.ToArray(), 0);
mesh.name = name;
return(mesh);
}
public static UnityEngine.Mesh Mesh(this EPPZ.Geometry.Model.Polygon this_, TriangulatorType triangulator, string name = "")
{
return(this_.Mesh(Color.white, triangulator, name));
}
