Hello Renan,
> But the thing is: I need these shapes to be created from the osg::Geometry
> class, as a matter of compatibility with another class. Do you know how to
> create the specific shapes I told you about (sphere, cylinder and box)?
Your question could be two things:
a) If you're asking how to specify vertex coordinates and indices in
order to make a model in an osg::Geometry, then look at the tutorials
that were mentioned. It's basically down to filling vertex and index
arrays, and those tutorials have example code. You can also look at
the osggeometry example.
b) If you're asking how to calculate the appropriate vertices and
indices to make a sphere, a cylinder or a box, then it's a purely
mathematical exercise. For a box it's simple... For a sphere and a
cylinder, there are a few ways, I urge you to try it yourself (hint: a
bunch of vectors going in different directions around the origin, when
normalized, will give a coarse or fine approximation of a circle,
depending on how many vectors you used).
If you're really in a hurry I'm sure I can dig up some old code, but
really, it's an exercise that's given in any basic Computer Graphics
course (and the old code I would give you is exactly that, the answers
I gave to that exercise in my basic Computer Graphics course :-) ).
You could also load up Blender, make a sphere or a cylinder, and
export it to .osg with osgExporter (or any other format you can read -
or any other modeling tool you have). But doing it mathematically is
pretty easy too.
Good luck,
J-S
--
______________________________________________________
Jean-Sebastien Guay [EMAIL PROTECTED]
http://whitestar02.webhop.org/
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