Re: [Plib-users] Readable user docs for PUI?

[James F. <fr...@cs...>]

On Wed, 7 May 2008, Steve Baker wrote:

> I believe you can easily attach PUI widgets to 3D surfaces - I did that
> a LONG time ago though and lots has changed since then.   I think you
> can just get into pu.cxx and write a new function that is just like
> puDisplay() but calls your own code instead of using
> puSetOpenGLState().  Take out the glViewport() call, the glOrtho() and
> the two glLoadIdentity() calls and push whatever transform you want onto
> the stack instead.  PUI disables depth-testing, fog and lighting - and
> you may need to change that too.  The biggest problem (IIRC) as in
> transforming your mouse coordinates when you feed them to puMouse().

Hummm... I had been thinking I'd have to re-write most of the drawing 
code to do 3D drawing instead of 2D - e.g. calling glVertex3f instead of 
glVertex2i - then changing setPosition & setSize to take 3D coords, adding 
a setRotation, etc.

This is intended to work within an existing VR library (freeVR), so the 
basic graphics environment gets set up there.  It gives you 3D "wand" 
coordinates.  I imagine that will involve a bit of work to find what is 
selected, but it seems simple in principle.

> You can even make PUI draw a software cursor so that your control panels
> have cursors that move around in perspective and such.

Already handled by the VR lib - and of course in a CAVE-like environment 
it's actually tracking hand or wand position.

> If you are concerned about LGPL issues...

Not at all.  This is just a project for a class, so odds are it won't get 
used afterwards.  If it does, it would go into the freeVR lib that's also 
LGPL'd (or similar).