Wed, 12/09/2015 - 16:00
please consider the attached snapshot. There's a displayed object with its view clipped with a plane:
Handle(V3d_Plane) plane = new V3d_Plane;
plane->SetPlane(a, b,c, d);
I usually use clipping planes to explore and select (sub-)shapes from "inside" of objects. However, the (sub-)shapes that are hidden by the clipping plane are also selectable (highlighted with white in the attached png). This prevents me from selecting (sub-shapes) from "behind" them (i.e. "inside" an object).
I noticed this behavior in OCCT 6.9.1 whereas OCCT 6.7.1 works as expected - the shapes (entirely) hidden by the clipping plane are not detectable/selectable.
Is this the intended behavior in 6.9.1 or does it represent a bug? How can fix?
Wed, 12/09/2015 - 17:16
We confirm it is an OCCT bug and Mantis issue #26973 has been reported for this problem.
Can you please describe steps to reproduce the bug in the issue, in terms of OCCT C++ API calls or DRAW commands?
Wed, 12/09/2015 - 18:53
I would say the steps already posted in Mantis (issue #26973) correctly reproduce the bug. I additionally tried to enable shape decomposition (FACE mode) and move the cursor over faces but the command "vselmode" does not seem to work in Draw.