Mark | 5 Jan 2011 12:10
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Re: Solid model from gcode (was Re: Interpreter/axis question)

On Tue, Jan 4, 2011 at 6:56 PM, EBo <ebo-doD3EReIBWJBDgjK7y7TUQ@public.gmane.org> wrote:
 On 4 January 2011 22:48, Mark <mpictor-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> I was assuming (from a position of ignorance) that there was
>> something
>> built in to OpenCascade that dod sweeps. My experience is purely in
>> 3D
>> CAD, and in those packages you can only sweep a 2D sketch along a 3D
>> path.
>>
> OCC won't sweep using a solid. If it did, this would be much easier.

 What does it use?  If it only uses a 2D projection, then use the
 silhouette.
 
Yes, that's what I'm trying to do with occ's hidden line removal. However, I ran into problems with the data that opencascade gives me. I need a closed loop of edges, and for any two ends that are coincident, the edges need to share the same vertex in memory. They don't share vertex objects, though the coordinates are the same. I tried to replace one of the vertexes with the other, but haven't been able to make it work yet. I end up with an invalid pointer, and haven't tracked the cause down yet.

Mark
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