public static void AddZAxis(Model3DGroup group,
double length = 4, double thickness = 0.1)
{
MeshGeometry3D mesh = new MeshGeometry3D();
Point3D origin = D3.Origin -
D3.XVector(thickness / 2) -
D3.YVector(thickness / 2) -
D3.ZVector(thickness / 2);
mesh.AddBox(origin,
D3.XVector(thickness), D3.YVector(thickness), D3.ZVector(length));
group.Children.Add(mesh.MakeModel(Brushes.Blue));
}
// Make a cube at the origin.
public static void AddOrigin(Model3DGroup group,
double cubeThickness = 0.102)
{
MeshGeometry3D mesh = new MeshGeometry3D();
Point3D origin = D3.Origin -
D3.XVector(cubeThickness / 2) -
D3.YVector(cubeThickness / 2) -
D3.ZVector(cubeThickness / 2);
mesh.AddBox(origin,
D3.XVector(cubeThickness),
D3.YVector(cubeThickness),
D3.ZVector(cubeThickness));
group.Children.Add(mesh.MakeModel(Brushes.Black));
}
// Define the model.
private void DefineModel(Model3DGroup group)
{
MeshGeometry3D mesh1 = new MeshGeometry3D();
Point3D center = new Point3D(-2, 0, 2);
mesh1.AddTexturedSphere(center, 1.5, 20, 10, true);
group.Children.Add(mesh1.MakeModel("world.jpg"));
// Add a point to redefine the texture area to hide the "seam."
mesh1.Positions.Add(new Point3D());
mesh1.TextureCoordinates.Add(new Point(1.01, 1.01));
MeshGeometry3D mesh2 = new MeshGeometry3D();
center = new Point3D(-2, 0, -2);
mesh2.AddTexturedSphere(center, 1.5, 20, 10, true);
group.Children.Add(mesh2.MakeModel("world.jpg"));
// Add a point to redefine the texture area to hide the "seam."
mesh2.Positions.Add(new Point3D());
mesh2.TextureCoordinates.Add(new Point(1.01, 1.01));
// Modify the normals.
for (int i = 0; i < mesh2.Normals.Count; i++)
{
if (mesh2.Normals[i].X > 0)
{
mesh2.Normals[i] *= 1000;
}
else
{
mesh2.Normals[i] /= 1000;
}
// Console.WriteLine(mesh2.Normals[i].Length);
}
MeshGeometry3D mesh3 = new MeshGeometry3D();
center = new Point3D(2, 0, 2);
mesh3.AddTexturedSphere(center, 1.5, 20, 10, true);
//mesh3.ApplyTransformation(new ScaleTransform3D(new Vector3D(1, 0.5, 1), center));
mesh3.ApplyTransformation(D3.Rotate(D3.XVector(), center, 90));
group.Children.Add(mesh3.MakeModel("world.jpg"));
// Add a point to redefine the texture area to hide the "seam."
mesh3.Positions.Add(new Point3D());
mesh3.TextureCoordinates.Add(new Point(1.01, 1.01));
MeshGeometry3D mesh4 = new MeshGeometry3D();
center = new Point3D(2, 0, -2);
mesh4.AddTexturedSphere(center, 1.5, 20, 10, true);
//mesh4.ApplyTransformation(new ScaleTransform3D(new Vector3D(1, 0.5, 1), center));
mesh4.ApplyTransformation(D3.Rotate(D3.XVector(), center, 90));
group.Children.Add(mesh4.MakeModel("world.jpg"));
// Add a point to redefine the texture area to hide the "seam."
mesh4.Positions.Add(new Point3D());
mesh4.TextureCoordinates.Add(new Point(1.01, 1.01));
// Modify the normals.
for (int i = 0; i < mesh4.Normals.Count; i++)
{
if (mesh4.Normals[i].X > 0)
{
mesh4.Normals[i] *= 1000;
}
else
{
mesh4.Normals[i] /= 1000;
}
// Console.WriteLine(mesh4.Normals[i].Length);
}
// Show the axes.
MeshExtensions.AddAxes(group);
}