private HalfEdgeMesh CreateUnitCubeMesh()
{
var vertices = new[]
{
new Point3D(0, 0, 0), new Point3D(1, 0, 0), new Point3D(1, 1, 0), new Point3D(0, 1, 0),
new Point3D(0, 0, 1), new Point3D(1, 0, 1), new Point3D(1, 1, 1), new Point3D(0, 1, 1)
};
var mesh = new HalfEdgeMesh(vertices);
mesh.AddFace(3, 2, 1, 0);
mesh.AddFace(4, 5, 6, 7);
mesh.AddFace(0, 1, 5, 4);
mesh.AddFace(1, 2, 6, 5);
mesh.AddFace(2, 3, 7, 6);
mesh.AddFace(3, 0, 4, 7);
return mesh;
}
public MainWindow()
{
InitializeComponent();
DataContext = this;
this.Mesh = CreateUnitCubeMesh();
}
/// <summary>
/// The highlight face.
/// </summary>
/// <param name="face">
/// The face.
/// </param>
private void HighlightFace(HalfEdgeMesh.Face face)
{
var adjacentFaces = new HashSet<HalfEdgeMesh.Face>(face.AdjacentFaces);
var adjacentVertices = new HashSet<HalfEdgeMesh.Vertex>(face.Vertices);
var edges = new HashSet<HalfEdgeMesh.HalfEdge>(face.Edges);
foreach (var f in this.Mesh.Faces)
{
var element = this.faceVisuals[f];
var model = element.Model as GeometryModel3D;
if (f == face)
{
model.Material = this.SelectedMaterial;
}
else if (adjacentFaces.Contains(f))
{
model.Material = this.AdjacentMaterial;
}
else
{
model.Material = this.UnselectedMaterial;
}
}
foreach (var v in this.Mesh.Vertices)
{
var element = this.vertexVisuals[v];
var model = element.Model as GeometryModel3D;
if (adjacentVertices.Contains(v))
{
model.Material = this.AdjacentMaterial;
}
else
{
model.Material = this.UnselectedMaterial;
}
}
foreach (var e in this.Mesh.Edges)
{
var element = this.halfEdgeVisuals[e];
var model = element.Model as GeometryModel3D;
if (edges.Contains(e))
{
model.Material = this.ConnectedMaterial;
}
else
{
model.Material = this.UnselectedMaterial;
}
}
}
/// <summary>
/// The highlight vertex.
/// </summary>
/// <param name="vertex">
/// The vertex.
/// </param>
private void HighlightVertex(HalfEdgeMesh.Vertex vertex)
{
var adjacentFaces = new HashSet<HalfEdgeMesh.Face>(vertex.AdjacentFaces);
var adjacentVertices = new HashSet<HalfEdgeMesh.Vertex>(vertex.Vertices);
var incomingEdges = new HashSet<HalfEdgeMesh.HalfEdge>(vertex.IncomingEdges);
var outgoingEdges = new HashSet<HalfEdgeMesh.HalfEdge>(vertex.OutgoingEdges);
foreach (var f in this.Mesh.Faces)
{
var element = this.faceVisuals[f];
var model = element.Model as GeometryModel3D;
if (adjacentFaces.Contains(f))
{
model.Material = this.AdjacentMaterial;
}
else
{
model.Material = this.UnselectedMaterial;
}
}
foreach (var v in this.Mesh.Vertices)
{
var element = this.vertexVisuals[v];
var model = element.Model as GeometryModel3D;
if (v == vertex)
{
model.Material = this.SelectedMaterial;
}
else if (adjacentVertices.Contains(v))
{
model.Material = this.AdjacentMaterial;
}
else
{
model.Material = this.UnselectedMaterial;
}
}
foreach (var e in this.Mesh.Edges)
{
var element = this.halfEdgeVisuals[e];
var model = element.Model as GeometryModel3D;
if (incomingEdges.Contains(e))
{
model.Material = this.AdjacentMaterial;
}
else if (outgoingEdges.Contains(e))
{
model.Material = this.ConnectedMaterial;
}
else
{
model.Material = this.UnselectedMaterial;
}
}
}
/// <summary>
/// The highlight edge.
/// </summary>
/// <param name="edge">
/// The edge.
/// </param>
private void HighlightEdge(HalfEdgeMesh.HalfEdge edge)
{
foreach (var f in this.Mesh.Faces)
{
var element = this.faceVisuals[f];
var model = element.Model as GeometryModel3D;
if (edge.Face == f)
{
model.Material = this.ConnectedMaterial;
}
else if (edge.AdjacentFace == f)
{
model.Material = this.AdjacentMaterial;
}
else
{
model.Material = this.UnselectedMaterial;
}
}
foreach (var v in this.Mesh.Vertices)
{
var element = this.vertexVisuals[v];
var model = element.Model as GeometryModel3D;
if (v == edge.StartVertex)
{
model.Material = Materials.Black;
}
else if (v == edge.EndVertex)
{
model.Material = Materials.White;
}
else
{
model.Material = this.UnselectedMaterial;
}
}
foreach (var e in this.Mesh.Edges)
{
var element = this.halfEdgeVisuals[e];
var model = element.Model as GeometryModel3D;
if (e == edge)
{
model.Material = this.SelectedMaterial;
}
else if (e == edge.AdjacentEdge)
{
model.Material = this.AdjacentMaterial;
}
else
{
model.Material = this.UnselectedMaterial;
}
}
}