Re: [Visualpython-users] Planned work for Fall '01

[Arthur S. <aj...@ix...>]

Not sure its directly responsive - but high on my wish list is some simple
access to 4 factor coloring   - some access to an alpha transparency.  Full
opaqueness often fully
hides objects where I wish to at least hint at their existence.

It has been already explained to me why this is not a simple matter, though
I didn't get it.  I know in opengl its simply a matter of using a color4
rather than a color3. Why
can't that be an option, with the alpha factored defaulted to 1 if one uses
only a
3 elements.

Seems to be that texturing is harder than this.  Will the work necessary
have any impact on the ability to implement transparency?

I realize I am missing something - depth cuing or something.  Personally I'd
happily settle for a not-so-good transparency if that were easily
achievable.

ART

----- Original Message -----
From: "Ari Heitner" <ahe...@an...>
To: <vis...@li...>
Sent: Sunday, July 22, 2001 12:37 PM
Subject: [Visualpython-users] Planned work for Fall '01


>
> hi everyone,
>
> i'm a cmu student and i've been involved with vpython in minor ways for
some
> time now. i've been meaning to implement first textures, then proper
> hierarchical models, in vpython for about a year now. i haven't really
done
> much in that direction, but now that dscherer has written the Faces
> primitive, and i actually have the time (coursewise) to devote to it, i'm
> hoping to get this done this coming semester.
>
> i haven't thought seriously about the kind of interfaces that would be
nice
> for texturing the existing primitives, and i want to get peoples' input. i
> always assumed that there isn't a good consistent interface, and that some
> primitives (faces, box) will want to take a list of texture coordinates,
> while things like sphere have only one reasonable texturing scheme
> (especially because sphere may change detail levels).
>
> after textures i'd like to do hierarchical models, which can be made up of
> faces objects in frames quite nicely. the only question is what model
format
> to use for importing. i'm open to suggestions here. i've written 3DS
> exporters in the past; it's doable but not something i want to spend time
> on. is there a good standard format the 3ds can talk to (doesn't need to
be
> complicated, just needs to support hierarchy and textures)? is vrml it
> (ugh!)?
>
> i'm mainly posting this because i suspect a lot of people would like this,
> and i'd like to coordinate efforts so we don't end up duplicating work.
> while i expect to get this stuff done fairly quickly when i actually start
> on it, i won't be starting for about another month (once i get back to
> pittsburgh).
>
>
> ari
>
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