CGAL users discussion list

[Qianqian Fang <>]

On 03/21/2011 10:47 AM, Sebastien Loriot (GeometryFactory) wrote:
> > http://nmr.mgh.harvard.edu/~fangq/temp/post_extract.off
>
> Your off file contains triangles that are not consistently oriented
> to describe a polyhedron. You need to reorient triangles.
>
> If you use the Polyhedron demo of CGAL, do:
> "Operations -> Orient polygon soup"
> To produce a 3D mesh you can then do:
> Save in back to an off file and reload it.
> Then do:
> "Operation -> Create a tetrahedral mesh"
>  or directly use your code.

I used JMeshLib (http://jmeshlib.sourceforge.net/) to reorient
all triangles, but the output surface mesh still crashed the
polyhedral mesher. The surface meshes before and after
the reorientation can be found here

http://nmr.mgh.harvard.edu/~fangq/temp/pre_cgalpoly.off
http://nmr.mgh.harvard.edu/~fangq/temp/pre_cgalpoly_reorder.off

any more comments?

thanks

Qianqian