public static Vertex[] Create(int smoothLevel = 0)
{
IReadOnlyList <Triangle> triangles = Icosahedron.CreateTriangles();
for (var i = 0; i < smoothLevel; ++i)
{
var smoothedTriangles = new List <Triangle>(triangles.Count * 4);
foreach (var tri in triangles)
{
var a = Vector3.Normalize(GeometryHelper.GetEdgeMiddle(tri.A, tri.B));
var b = Vector3.Normalize(GeometryHelper.GetEdgeMiddle(tri.B, tri.C));
var c = Vector3.Normalize(GeometryHelper.GetEdgeMiddle(tri.C, tri.A));
smoothedTriangles.Add(new Triangle(tri.A, a, c));
smoothedTriangles.Add(new Triangle(tri.B, b, a));
smoothedTriangles.Add(new Triangle(tri.C, c, b));
smoothedTriangles.Add(new Triangle(a, b, c));
}
triangles = smoothedTriangles;
}
var mesh = triangles.ToMesh();
GeometryHelper.UVMap(mesh, UVMapping);
return(mesh);
}
private static Vector3 GetNewPosition(IReadOnlyList <Triangle> allFaces, Vector3 vertex)
{
var faces = GetFacesForPoint(allFaces, vertex);
var edges = GetEdgesForPoint(allFaces, vertex);
if (faces.Count == edges.Count)
{
return(Barycentre(vertex, faces.Count,
GeometryHelper.Average(faces.Select(f => f.Center)),
GeometryHelper.Average(edges.Select(p => GeometryHelper.GetEdgeMiddle(vertex, p)))));
}
else
{
var avgMidEdges = GeometryHelper.Average(edges.Where(p => GetFacesForEdge(allFaces, vertex, p).Count == 1).Select(p => GeometryHelper.GetEdgeMiddle(vertex, p)));
return((vertex + avgMidEdges) / 2f);
}
}