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

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

You can click on "See pictures of 3D objects", then click on the object of 
interest (curve, in your case). Or in the pull-down menu labeled "3D objects" 
choose curve. If you have suggestions of how to make these operations more 
obvious, please let us know.

Bruce Sherwood

Wayne Watson wrote:
> 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?
>>
>