[RESOLVED] What is this quadric object in OpenGL?

[memeloo]

I'm searching and searching and I have no luck... can someone please explain to me what is this quadric object in OpenGL, what it does and why?

[olivthill2]

The class of quadrics (surfaces that can be defined by a quadratic equation) include spheres, cylinders, cones, ellipsoids, paraboloids, etc.

With the OpenGL quadric object you can draw spheres, cylinders, cones, ellipsoids, paraboloids, etc.

[memeloo]

surfaces that can be defined by a quadratic equation

this seems to be the answer that I was looking for ;]

I came upon the quadric class as I wanted to draw a cylinder with gluCylinder and the first paramter is a quadric object

but it's still a little bit illogical to me, why can't the cylinder funciton create this object internally... hmm, I'll try to find the source code, glu is open source, isn't it?

edit: great, I've finally found, strange, I was srearching all the time for quadric object and found only some pages with tutorials but I changed my strategy and tried to look for glu at wikipedia and then bam! found ;]

http://en.wikipedia.org/wiki/Quadric