public void CreateMaterial()
{
if (this.Material != null)
{
return;
}
byte[] data = this.Image.GetImageData();
if (data != null)
{
var bitmap = BitmapSource.Create(this.Image.Width, this.Image.Height, 96, 96, PixelFormats.Bgra32, null, data, this.Image.Width * 4);
var material = new EmissiveMaterial(new ImageBrush(bitmap));
material.Freeze();
this.Material = material;
}
this.Image = null;
}
internal static GeometryModel3D MakeLine3D(Vector3D start, Vector3D end, Brush brush, double scale = 0.01)
{
MeshGeometry3D mesh = new MeshGeometry3D();
var length = (end - start).Length;
var positions = new List <Point3D>();
positions.Add(new Point3D(-scale, +scale, 0));
positions.Add(new Point3D(-scale, +scale, +length));
positions.Add(new Point3D(+scale, +scale, +length));
positions.Add(new Point3D(+scale, +scale, 0));
positions.Add(new Point3D(-scale, -scale, 0));
positions.Add(new Point3D(-scale, -scale, +length));
positions.Add(new Point3D(+scale, -scale, +length));
positions.Add(new Point3D(+scale, -scale, 0));
var segment = end - start;
var defaultAxis = new Vector3D(0, 0, length);
var rot = Vector3D.AngleBetween(defaultAxis, segment);
var rotAxis = Vector3D.CrossProduct(defaultAxis.NormalizeTo(), segment.NormalizeTo());
var matRot = new Matrix3D();
if (rotAxis.Length > 0.0)
{
matRot.Rotate(new Quaternion(rotAxis, rot));
}
foreach (var pos in positions)
{
mesh.Positions.Add(matRot.Transform(pos) + start);
}
// top
mesh.TriangleIndices.Add(0);
mesh.TriangleIndices.Add(1);
mesh.TriangleIndices.Add(3);
mesh.TriangleIndices.Add(2);
mesh.TriangleIndices.Add(3);
mesh.TriangleIndices.Add(1);
// bottom
mesh.TriangleIndices.Add(4);
mesh.TriangleIndices.Add(5);
mesh.TriangleIndices.Add(7);
mesh.TriangleIndices.Add(6);
mesh.TriangleIndices.Add(7);
mesh.TriangleIndices.Add(5);
// left
mesh.TriangleIndices.Add(0);
mesh.TriangleIndices.Add(1);
mesh.TriangleIndices.Add(4);
mesh.TriangleIndices.Add(5);
mesh.TriangleIndices.Add(4);
mesh.TriangleIndices.Add(1);
// right
mesh.TriangleIndices.Add(3);
mesh.TriangleIndices.Add(2);
mesh.TriangleIndices.Add(7);
mesh.TriangleIndices.Add(6);
mesh.TriangleIndices.Add(7);
mesh.TriangleIndices.Add(2);
mesh.Freeze();
var diffuse = new DiffuseMaterial(Brushes.Black);
var emissive = new EmissiveMaterial(brush);
diffuse.Freeze();
emissive.Freeze();
var material = new MaterialGroup();
material.Children.Add(diffuse);
material.Children.Add(emissive);
material.Freeze();
return(new GeometryModel3D(mesh, material)
{
BackMaterial = material
});
}