public List<Face> SplitQuad(Face face)
{
_face = face;
_faces = new List<Face>();
GetCorners();
var width = _vertex1 - _vertex0;
var height = _vertex3 - _vertex0;
var deltaWidth = width / 2;
var deltaHeight = height / 2;
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
var vertex0 = _vertex0 + deltaWidth * i + deltaHeight * j;
var vertex1 = _vertex0 + deltaWidth * (i+1) + deltaHeight * j;
var vertex2 = _vertex0 + deltaWidth * (i+1) + deltaHeight * (j+1);
var vertex3 = _vertex0 + deltaWidth * i + deltaHeight * (j+1);
var newFace = new Face(new List<Vector3> {vertex0, vertex1, vertex2, vertex3});
_faces.Add(newFace);
}
}
return _faces;
}
public static bool AreNeighbours(this Face f, Face face)
{
var ownEdges = f.Edges;
var faceEdges = face.Edges;
return ownEdges.Any(edge => faceEdges.Any(e => e.AreEqual(edge)));
}
public IEnumerable<Face> CreateCubeMesh()
{
//Front
var vertex0 = new Vector3(-0.5f, -0.5f, 0.5f);
var vertex1 = new Vector3(-0.5f, 0.5f, 0.5f);
var vertex2 = new Vector3(0.5f, 0.5f, 0.5f);
var vertex3 = new Vector3(0.5f, -0.5f, 0.5f);
//Rear
var vertex4 = new Vector3(-0.5f, -0.5f, -0.5f);
var vertex5 = new Vector3(-0.5f, 0.5f, -0.5f);
var vertex6 = new Vector3(0.5f, 0.5f, -0.5f);
var vertex7 = new Vector3(0.5f, -0.5f, -0.5f);
var front = new Face(new List<Vector3> { vertex0, vertex1, vertex2, vertex3 });
var back = new Face(new List<Vector3> { vertex4, vertex5, vertex6, vertex7 });
var left = new Face(new List<Vector3> { vertex4, vertex5, vertex1, vertex0 });
var right = new Face(new List<Vector3> { vertex7, vertex3, vertex2, vertex6 });
var top = new Face(new List<Vector3> { vertex1, vertex5, vertex6, vertex2 });
var bottom = new Face(new List<Vector3> { vertex0, vertex4, vertex7, vertex3 });
return new List<Face> {front, back, left, right, top, bottom};
}
public void SetUp()
{
_vertex0 = new Vector3(-1, -1, 0);
_vertex1 = new Vector3(-1, 1, 0);
_vertex2 = new Vector3(1, 1, 0);
_vertex3 = new Vector3(1, -1, 0);
_face = new Face(new List<Vector3> {_vertex0, _vertex1, _vertex2, _vertex3});
}