Re: [Visualpython-users] Helix transparency

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

It appears that helix doesn't support transparency yet, nor does curve 
upon which helix is based. (The helix object is coded in Python, not 
C++; see the module "primitives.py" in the visual folder.) And I think 
it's the case that currently the only objects that handle textures are 
box and sphere.

Thanks for the reminder about axes. You're right, it would be good to 
have this object.

Bruce Sherwood

Robert Beichner wrote:

>What objects will support transparency?  I noticed that the helix  
>does not.  The crystal demo looks pretty neat when you can look  
>through the vibrating spherical atoms to see those farther back, but  
>the springs still get in the way since they are opaque.
>
>I'm experimenting with modulating the transparency of a vector with  
>its magnitude.  (In other words, little vectors are also more  
>transparent.)  Fill space with a lot of these short, clear vectors  
>may help get the idea across that electric and magnetic fields fill  
>space and aren't just confined to the regions near charges, wires,  
>etc.  It looks promising so far.  (I've modified Ruth's program that  
>illustrates a B field near a straight wire, if anyone wants to see  
>it.)  Conversely, I wonder if making Gaussian surfaces transparent  
>would make them seem less "real" to students.
>
>Any chance of a coordinate axes object going into the "final" new  
>version?  It would be one less thing for students to have to worry  
>about.  I use boilerplate, but an object would be cleaner.
>
>
>Bob
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