Thanks for your valuable information.
However, after tying to use geometry type (such as ellipse) to represent the point cloud,
I realize that the method "viewport.Children.Add()" , mainly used to control the rotation
and translation perspective in 3D space, can only accept the type of Visual3D, which can only be regarded
as a mesh model. So, the point is whether there is any type of kit3d can be used to represent 3d point clouds
located in the 3d coordinate.
Thanks a million~~~^^
Ricky
