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

[Wayne W. <sie...@sb...>]

Thanks. It looks like I installed 5. Help->Visual shows New Features in 
5. I guess my timing was right for the need for opacity. Is there a 
specific place in the doc hmtl that I might find reference to curve? 
This looks like a very attractive tool.

Bruce Sherwood wrote:
> 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?
>

-- 
           Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

             (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
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