public static Mesh TriangulateSimple(Polygon2 polygon, Vector2 UVScale, Vector2 UVOffset)
{
Mesh result = null;
//result = TriangulateAdvanced(polygon, UVScale, UVOffset);
polygon.Normalize();
result = UnityDefaultTriangulator.Create(polygon.points);
return(result);
}
public static Mesh Triangulate(Polygon2D polygon, Vector2 UVScale, Vector2 UVOffset, Triangulation triangulation)
{
Mesh result = null;
switch (triangulation)
{
case Triangulation.Advanced:
Polygon2D newPolygon = new Polygon2D(PreparePolygon(polygon));
if (newPolygon.pointsList.Count < 3)
{
Debug.LogWarning("mesh is too small for advanced triangulation, using simplified triangulations instead (size: " + polygon.GetArea() + ")");
result = TriangulateAdvanced(polygon, UVScale, UVOffset);
return(result);
}
foreach (Polygon2D hole in polygon.holesList)
{
newPolygon.AddHole(new Polygon2D(PreparePolygon(hole)));
}
result = TriangulateAdvanced(newPolygon, UVScale, UVOffset);
break;
case Triangulation.Legacy:
List <Vector2> list = new List <Vector2>();
foreach (Vector2D p in polygon.pointsList)
{
list.Add(p.ToVector2());
}
result = UnityDefaultTriangulator.Create(list.ToArray());
return(result);
}
return(result);
}
public static Mesh Triangulate3D(Polygon2D polygon, float z, Vector2 UVScale, Vector2 UVOffset, Triangulation triangulation)
{
Mesh result = null;
switch (triangulation)
{
case Triangulation.Advanced:
Polygon2D newPolygon = new Polygon2D(PreparePolygon(polygon));
foreach (Polygon2D hole in polygon.holesList)
{
newPolygon.AddHole(new Polygon2D(PreparePolygon(hole)));
}
if (newPolygon.pointsList.Count < 3)
{
if ((int)polygon.GetArea() == 0)
{
List <Vector2> l = new List <Vector2>();
foreach (Vector2D p in polygon.pointsList)
{
l.Add(p.ToVector2());
}
result = UnityDefaultTriangulator.Create(l.ToArray());;
return(result);
}
}
List <Vector3> sideVertices = new List <Vector3>();
List <int> sideTriangles = new List <int>();
int vCount = 0;
foreach (Pair2D pair in Pair2D.GetList(polygon.pointsList))
{
Vector3 pointA = new Vector3((float)pair.A.x, (float)pair.A.y, 0);
Vector3 pointB = new Vector3((float)pair.B.x, (float)pair.B.y, 0);
Vector3 pointC = new Vector3((float)pair.B.x, (float)pair.B.y, 1);
Vector3 pointD = new Vector3((float)pair.A.x, (float)pair.A.y, 1);
sideVertices.Add(pointA);
sideVertices.Add(pointB);
sideVertices.Add(pointC);
sideVertices.Add(pointD);
sideTriangles.Add(vCount + 2);
sideTriangles.Add(vCount + 1);
sideTriangles.Add(vCount + 0);
sideTriangles.Add(vCount + 0);
sideTriangles.Add(vCount + 3);
sideTriangles.Add(vCount + 2);
vCount += 4;
}
Mesh meshA = TriangulateAdvanced(newPolygon, UVScale, UVOffset);
Mesh meshB = new Mesh();
List <Vector3> verticesB = new List <Vector3>();
foreach (Vector3 v in meshA.vertices)
{
verticesB.Add(new Vector3(v.x, v.y, v.z + z));
}
meshB.vertices = verticesB.ToArray();
meshB.triangles = meshA.triangles.Reverse().ToArray();
Mesh mesh = new Mesh();
mesh.vertices = sideVertices.ToArray();
mesh.triangles = sideTriangles.ToArray();
List <Vector3> vertices = new List <Vector3>();
foreach (Vector3 v in meshA.vertices)
{
vertices.Add(v);
}
foreach (Vector3 v in meshB.vertices)
{
vertices.Add(v);
}
foreach (Vector3 v in sideVertices)
{
vertices.Add(v);
}
mesh.vertices = vertices.ToArray();
List <int> triangles = new List <int>();
foreach (int p in meshA.triangles)
{
triangles.Add(p);
}
int count = meshA.vertices.Count();
foreach (int p in meshB.triangles)
{
triangles.Add(p + count);
}
count = meshA.vertices.Count() + meshB.vertices.Count();
foreach (int p in sideTriangles)
{
triangles.Add(p + count);
}
mesh.triangles = triangles.ToArray();
mesh.RecalculateNormals();
mesh.RecalculateBounds();
result = mesh;
break;
}
return(result);
}