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GMAX boolean operation - Unwanted collapsed vertices

F

f16jockey

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50
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belgium
I probably messed up some settings in Gmax, as boolean operations give unwanted results.
Basically, I want to cut a T-beam under a certain angle. So I do a subtraction of an extruded spline and a box.



The beam is 0.30x0.15m, with a thickness of 0.02m.



In the result, the extremities of the beam are collapsed. The beam loses it's thickness.



What am I doing wrong ? IIRC this has always worked in the past.
Is there some setting that makes the endpoints collapse ?

Wim
 
It's just shit. You can cut the top poly to make an extra vert and drag it to the position you need. Z value will be the same as the one next to it. Eyeballing the rest will be fine...
 
The best way to do it would be to slice the polys ay the angle. Delete the ones you want to get rid of then merge the verts at the top and side together. Or delete the whole lot and extrude the edges at the top to fill the gap.

Boolean is best not used unless absolutely necessary.
 
Boolean works better with editable poly. I agree with Shaun that a Slice modifier would be better in this case, since there's something odd about the triangulation at the collapsing end.
 
Thanks for the replies. Will try that (but boolean on editable poly goes wrong as well).

OTOH When I draw everything 1000x bigger (beam 30x15, thickness 2) the boolean operation works as it should. Must be some threshold setting I'm not aware of.



Wim
 
What happens to your nice angled beam end if you then reduce it 1000x?
 
n4gix said:
What happens to your nice angled beam end if you then reduce it 1000x?
Click to expand...
Good idea, I kept following that path.
I work on the beam construction in a separate project now (in cm.) which I add as an scaled-down XRef to the main building (in m.).
Factor is 100x of course, not 1000.

Devious maybe, but hey... it works. Thanks!





Best regards,
Wim
 
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