Clipping plane bug in V8

[brt1]

please check the attached file:
while gumball-dragging the clipping plane, the three objects appear perfectly planar-capped at the cutting plane (screenshot 001). as soon as i release the mouse button, the cappings dissappear and the objects are displayed as open polysurfaces (screenshot 002).
see screenshots, please help …

clipPlane.3dm (1.2 MB)

[wim (Wim Dekeyser)]

Hi -

@brt1

clipPlane.3dm (1.2 MB)

Thanks for that file!
I’m only seeing that happen for one object in the 8.13 version that I’m running here.
On the list as RH-84036 ClippingPlane: No Cap on Section Sample
-wim

[kitjmv (jmv)]

Hello @wim ,
It seems that @stevebaer has already created a task for this. He asked me to send him the file, and he mentioned that he recorded it as an intersection issue. However.

Display of cutting plane and outline

Hello, I’m trying to understand how clipping planes work in Rhino8. Some objects are filled and some are not. Also, unfilled objects are filled only when the cutting plane is moved. And the cutting outlines are not always in bold. Sometimes there are gaps. All objects in this 3D model are closed nurbs. I modeled it in Rhino 7. In Rhino 7, the clipping is displayed correctly. I guess you are doing the clipping with a GL shader but what I don’t understand is why some objects are only t…

[wim (Wim Dekeyser)]

Hi -

@kitjmv

It seems that @stevebaer has already created a task for this.

These issues are file-specific and the intersection issue in the code might not be the same. It’s important to report samples that fail.
-wim

[brt1]

partially solved:

• reopened my file, checked “units … tolerances” (i always forget that .stp import sometimes cranks up this setting insanely) … tolerances were at 0.00001
• set them to 0.01
• clipping plane now works much better, still in some cases it fails to cap

[brt1]

@kitjmv

It seems that @stevebaer has already created a task for this.

opened the sample attached under the link above (Failure sample: No Capping On Section.3dm) and tested the solution described before (lowering the tolerances) which made the clipping plane work in the expected way.