public List <short> TriangulateAndReturnIndices()
{
EarClipping EarClipper = new EarClipping();
EarClipper.SetPoints(Vertices, null, Normal);
EarClipper.Triangulate();
var Result = EarClipper.Result;
List <short> Indices = new List <short>();
for (short Index = 0; Index < Result.Count; Index++)
{
Vector3m Vertex = Result[Index];
for (short IndexPoint = 0; IndexPoint < Vertices.Count; IndexPoint++)
{
if (Vertex.Equals(Vertices[IndexPoint]))
{
Indices.Add(IndexPoint);
}
}
}
return(Indices);
}
/**
* 建立自訂義的Mesh
*/
public void CreateEarClippingMesh(List <Vector3> posList, float height, MeshFilter meshFilter)
{
Mesh mesh = new Mesh();
meshFilter.mesh = mesh;
mesh.Clear();
//EarClipping
EarClipperLib.EarClipping earClipping = new EarClipperLib.EarClipping();
List <EarClipperLib.Vector3m> points = new List <EarClipperLib.Vector3m>();
for (int i = 0; i < posList.Count; i++)
{
EarClipperLib.Vector3m point = new EarClipperLib.Vector3m(posList[i].x, posList[i].y, posList[i].z);
points.Add(point);
}
earClipping.SetPoints(points);
earClipping.Triangulate();
var res = earClipping.Result;
res.Reverse();
int vert = 0;
#region Vertices
Vector3[] vertices = new Vector3[res.Count * 2 + 6 * posList.Count];
//Top cap
for (int i = 0; i < res.Count; i += 3)
{
vertices[vert++] = new Vector3(res[i].X, res[i].Y, res[i].Z);
vertices[vert++] = new Vector3(res[i + 1].X, res[i + 1].Y, res[i + 1].Z);
vertices[vert++] = new Vector3(res[i + 2].X, res[i + 2].Y, res[i + 2].Z);
}
//Buttom cap
for (int i = 0; i < res.Count; i += 3)
{
vertices[vert++] = new Vector3(res[i + 2].X, res[i + 2].Y, res[i + 2].Z) - Vector3.up * height;
vertices[vert++] = new Vector3(res[i + 1].X, res[i + 1].Y, res[i + 1].Z) - Vector3.up * height;
vertices[vert++] = new Vector3(res[i].X, res[i].Y, res[i].Z) - Vector3.up * height;
} // Sides
for (int i = 0; i < posList.Count; i++)
{
vertices[vert++] = posList[i];
vertices[vert++] = posList[(i + 1) % posList.Count];
vertices[vert++] = posList[i] - Vector3.up * height;
vertices[vert++] = posList[i] - Vector3.up * height;
vertices[vert++] = posList[(i + 1) % posList.Count];
vertices[vert++] = posList[(i + 1) % posList.Count] - Vector3.up * height;
}
#endregion
#region Normales
Vector3[] normales = new Vector3[vertices.Length];
vert = 0;
for (int i = 0; i < normales.Length; i += 3)
{
Vector3 nor = Vector3.Cross(vertices[i + 1] - vertices[i], vertices[i + 2] - vertices[i]).normalized;
for (int j = 0; j < 3; j++)
{
normales[vert++] = nor;
}
}
#endregion
#region Triangles
int[] triangles = new int[vertices.Length];
vert = 0;
for (int i = 0; i < triangles.Length; i++)
{
triangles[vert++] = i;
}
#endregion
mesh.vertices = vertices;
mesh.normals = normales;
mesh.triangles = triangles;
mesh.RecalculateBounds();
}
