Re: [Algorithms] Quadric surface extraction

[Gino v. d. B. <gin...@gm...>]

Quadratic surfaces in general are represented implicitly as a solution 
to a quadratic equation, so if you want to generate a mesh from a 
generic quadratic equation you will either need to resort to an implicit 
surface generation algorithm such as Marching Cubes, or find some clever 
way of parameterizing the surface (anyone?). For specific quadric 
surfaces such as ellipsoids, cones, cylinders you can straightforwardly 
derive a parametric representation. Code for generating meshes for these 
surface types is widely available. For instance, check out the 
quadric.c  in the OpenGL sample implementation 
(http://oss.sgi.com/projects/ogl-sample/) or OpenSceneGraph 
(http://www.openscenegraph.org/projects/osg).

Gino


On 6-1-2010 5:07, Tom Sparks wrote:
> Quadric surfaces how do I convert them to polygons meshes?
>
> tom_a_sparks
>
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