Difference of BRepPrimAPI_Make* and gp_*

Andrew Young's picture
Andrew Young
Sat, 02/10/2024 - 20:09
Forums: 
Modeling Data and Algorithms

Hi there,

I'm fairly new to this framework and I don't really understand the difference between BRepPrimAPI_MakeCone and gp_Cone or BRepPrimAPI_MakeCylinder and gp_Cylinder. Of course they are different classes, but pratically what difference does it make which Package I use? Especially because I can get an TopoDS_Face object from both of them.

Thanks in advance!

Dmitrii Pasukhin's picture
Dmitrii Pasukhin
Sun, 02/11/2024 - 13:51

Hello, BRepPrimAPI_* are tools to create topology with geometry. TopoDS_* is a topology. gp_* is pure geometry and Geom_* is the same pure geom. Directly you can't create topolofy from pure geometry (in most of the cases, excluding natural bound geometry).

Best regards, Dmitrii.

 

Andrew Young's picture
Andrew Young
Sun, 02/11/2024 - 22:05

I see, thank you so much!