[cgma-dev] get_graphics for OpenCascade?

[David Thompson]

Hi Jane,

> Sorry I didn't see the last two post before I sent out mine. David, is the meshing code fast enough for you?

I will give it a try when it makes it into meshkit. It certainly sounds like a better solution than trying to fix or work around problems in the underlying modeling kernel.

However, it would be nice if geom/GeometryQueryTool.cpp paid attention to the return value of gqe->get_graphics() so that calls to GeometryQueryTool::get_graphics(BodySM*, ...) would return failure instead of SUCCESS with an empty output.

	Thanks,
	David


> On Thu, Aug 15, 2013 at 10:10 AM, Tim Tautges <tautges at mcs.anl.gov> wrote:
> 
> 
> On 08/15/2013 09:55 AM, David Thompson wrote:
> ... As for watertight triangulations from the faceter, for single volumes, from ACIS, the faceting is generally watertight (though the facets from separate surfaces don't share points).  But for multiple volumes sharing surfaces, the faceting often won't be watertight.
> 
> That all sounds OK.
> 
> ... There's a tool in MeshKit that does make facet models coming from CAD watertight, and has shown good robustness even for huge models.  ...
> 
> 
> If it's fast, that would be great. If it's slow and generating a high-quality mesh, that's probably not what we're looking for here (but would be using elsewhere).
> 
> 
> IIRC, it's fast enough even for large models.  See http://www.imr.sandia.gov/papers/imr19/Smith2B.3.pdf.
> 
> - tim
> 
> 
>         Thanks,
>         David
> 
> 
> -- 
> ================================================================
> "You will keep in perfect peace him whose mind is
>   steadfast, because he trusts in you."               Isaiah 26:3
> 
>              Tim Tautges            Argonne National Laboratory
>          (tautges at mcs.anl.gov)      (telecommuting from UW-Madison)
>  phone (gvoice): (608) 354-1459      1500 Engineering Dr.
>             fax: (608) 263-4499      Madison, WI 53706
> 
> 
> 
> 
> -- 
> Jane Hu
> 
> Asst. Researcher
> Dept. of Engineering Physics
> UW @ Madison
> 
> "And we know that for those who love God, that is, for those who are called according to his purpose, all things are working together for good." (Romans 8:28)