Draw Sphere
This command allows you to draw/create spheres with some constraints.
Requirements
No selection is required to launch the command.
Click some points in the scene(at least 2 points are required), the best sphere of all input points is computed.
You can force parameters (Center, Radius) by clicking on the locks:
Enter the XYZ coordinates in the edit controls or click on the icon
to click a point in the scene.
Notes
The sphere created will be the one best fitting the points while keeping the values entered by the user.