public void MergeEdgesOnACube()
{
Mesh m = PrimitiveShapes.Cube();
var e = m.HalfEdges.First();
var a = e.Twin.End;
var b = e.End;
var x = m.GetVertex(new Vector3(0, 0, 100));
Assert.AreEqual(9, m.Vertices.Count());
Assert.AreEqual(24, m.HalfEdges.Count());
Assert.AreEqual(6, m.Faces.Count());
var e2 = e.Split(x);
foreach (var face in m.Faces)
{
foreach (var edge in face.Edges)
{
Assert.AreEqual(edge.End, edge.Next.Twin.End);
}
}
Assert.AreEqual(e.End, b);
Assert.AreEqual(e.Twin.End, x);
Assert.AreEqual(e2.End, x);
Assert.AreEqual(e2.Twin.End, a);
Assert.AreEqual(9, m.Vertices.Count());
Assert.AreEqual(26, m.HalfEdges.Count());
Assert.AreEqual(6, m.Faces.Count());
e2.Merge();
foreach (var face in m.Faces)
{
foreach (var edge in face.Edges)
{
Assert.AreEqual(edge.End, edge.Next.Twin.End);
}
}
Assert.AreEqual(9, m.Vertices.Count());
Assert.AreEqual(24, m.HalfEdges.Count());
Assert.AreEqual(6, m.Faces.Count());
foreach (var face in m.Faces)
{
Assert.AreEqual(4, face.Edges.Count());
Assert.AreEqual(4, face.Vertices.Count());
Assert.AreEqual(4, face.Neighbours.Count());
Assert.IsFalse(face.Vertices.Contains(x));
}
m.CleanVertices();
Assert.AreEqual(8, m.Vertices.Count());
Assert.AreEqual(24, m.HalfEdges.Count());
Assert.AreEqual(6, m.Faces.Count());
}
public void VertexIndicesPreserved()
{
Mesh m = PrimitiveShapes.Cube();
Face f = m.Faces.First();
Vertex[] v1 = f.Vertices.ToArray();
f.Delete();
Face f2 = m.GetFace(v1);
Vertex[] v2 = f2.Vertices.ToArray();
Assert.AreEqual(v1.Length, v2.Length);
for (int i = 0; i < v1.Length; i++)
{
Assert.AreEqual(v1[i], v2[i]);
}
}