// Define the model.
private void DefineModel(Model3DGroup group)
{
//// Verify the icosahedron calculations.
//MeshExtensions.VerifyIcosahedron();
// Show the axes.
MeshExtensions.AddAxes(group);
const double scale = 0.8;
// Make a solid dodecahedron.
MeshGeometry3D mesh1 = new MeshGeometry3D();
mesh1.AddDodecahedron();
mesh1.ApplyTransformation(new ScaleTransform3D(scale, scale, scale));
group.Children.Add(mesh1.MakeModel(Brushes.Red));
// Make a translucent icosahedron.
MeshGeometry3D mesh2 = new MeshGeometry3D();
mesh2.AddIcosahedron();
double icoScale = scale * G3.DodecahedronCircumradius() / G3.IcosahedronInradius();
mesh2.ApplyTransformation(new ScaleTransform3D(icoScale, icoScale, icoScale));
mesh2.ApplyTransformation(D3.Rotate(D3.YVector(), D3.Origin, 180));
Brush brush = new SolidColorBrush(Color.FromArgb(128, 128, 255, 128));
MaterialGroup group2 = D3.MakeMaterialGroup(
new DiffuseMaterial(brush),
new SpecularMaterial(Brushes.White, 100));
group.Children.Add(mesh2.MakeModel(group2));
// Make a translucent dodecahedron.
MeshGeometry3D mesh3 = new MeshGeometry3D();
mesh3.AddDodecahedron();
double dodScale = icoScale * G3.IcosahedronCircumradius() / G3.DodecahedronInradius();
mesh3.ApplyTransformation(new ScaleTransform3D(dodScale, dodScale, dodScale));
MaterialGroup group3 = D3.MakeMaterialGroup(
new DiffuseMaterial(brush),
new SpecularMaterial(Brushes.White, 100));
group.Children.Add(mesh3.MakeModel(group3));
}