Get direction(gp_Dir) from TopoDS_Edge - Forum Open Cascade Technology

Prajwal Shelar
Wed, 09/07/2022 - 21:37

Forums:

Modeling Data and Algorithms

Hello,

I am trying to get direction (gp_Dir) from TopoDS_Edge object. Is there any way to do it?

Thanks,
Prajwal

Mikhail Sazonov
Thu, 09/08/2022 - 09:48

Edge may have non-linear form. In that case the dir may be different along the edge. Do you know the curve parameter at which you need the dir?

Prajwal Shelar
Thu, 09/08/2022 - 10:38

Hi Mikhail,
Thanks for the reply.
I am assuming my selected edge will be in linear form. How can we achieve it for this condition? I found one solution for this case: Get the vertices at ends and then get their coordinates (gp_Pnt) and finally get a vector (gp_Vec) from these points. Can there be any other solution?
Thanks,
Prajwal.

Mikhail Sazonov
Thu, 09/08/2022 - 11:22

Yes, you can get 3D curve of the edge, and get derivative D1 at the parameter of, let's say, the beginning.

Prajwal Shelar
Thu, 09/08/2022 - 12:12

Okay. Thanks Mikhail!