Re: [Visualpython-users] Drawing Coordinate Systems, Celestial Mechanics, Spherical Trig

[Bruce S. <Bru...@nc...>]

Install the latest "Visual 5" which does support transparency. In the 
documentation (which is installed with VPython and accessible from the Help menu 
in the IDLE editor), consult the section on opacity from a pull-down menu.

The objects you should look at are curve (for drawing lines), sphere (setting 
the opacity to less than 1), and label (for showing labels).

Considering the drawing you reference, you probably will want to make your own 
routine based on the curve object to draw a dashed line.

Bruce Sherwood

Wayne Watson wrote:
> I would like some spherical geometry tools to draw spheres, arcs,
> 
> great circles, lat/long, and the like, along with labels and notation. An
> 
> example of such a drawing can be found at
> 
> <http://www.tpub.com/content/engineering/14071/css/14071_342.htm>. Label is 
> important. I'm assuming if one does this in 3-D that one could view the work 
> from an angle then project it onto a 2-D drawing surface, which one could 
> then print. Win XP user.
> 
> I've installed VisPython and see that most examples and tutorials are aimed at solid objects. My needs are mostly drawing lines, transparent sphere(s), and labels. Are there specific commands I should know about for these needs? 
>