Problem with extend Eyeshot Solid and Display in ViewportLayout - display

Question

I have a custom class (MyBox) that extend devDept.Eyeshot.Entities.Solid and I want to add it to the ViewportLayout like this:
MyBox box = new MyBox(10, 20, 30); // length, width, height
EyeViewportLayout.Entities.Add(box);
EyeViewportLayout.ZoomFit();
EyeViewportLayout.Invalidate();
I notice that to visualize my class I need to call Solid.CreateBox(length, width, height) which return a new Solid. How can I do the same work of CreateBox inside my custom class MyBox so when I add it to ViewportLayout.Entities it get displayed ?

Answer 1

If you solid is really only a box or anything in this list there is a simple way :
Box
Cone
Cylinder
Sphere
Spring
Torus
I'll assume it's really a box. Then create your class deriving from solid
public class MyBox : Solid
{
public double Length {get; private set;} = 0d;
public double Width {get; private set;} = 0d;
public double Height {get; private set;} = 0d;
public MyBox() { }
public MyBox Create(double length, double width, double height)
{
var myBox = Solid.CreateBox<MyBox>(length, width, height);
myBox.Length = length;
myBox.Width = width;
myBox.Height = height;
return myBox;
}
}
If you use any other shape of solid you will need to manually create each faces.