How to remove the top and bottom sides of the generated model and only retain the side of the model

Questions
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1

How to remove the top and bottom sides of the generated model and only retain the side of the model
please everyone for your comments.
https://playground.babylonjs.com/#NQV6WA

m1
m11007×707 58.4 KB

2

You could remove the faces with a normal like (0,1,0) or (0,-1,0). For eg:

1 Like
3

Hum :thinking: For once, I’m doubtful. This PG above looks to me like just not entirely correct. I passed by yesterday and quickly attempting a CSG and had about the same result (just not entirely correct). I think it might come from the mesh builder. This thingy doesn’t just feel totally right to me :zipper_mouth_face: May be I would attempt another approach for it. May be I would give it a try using greasedLines :thinking:

4

It’s easier to see what’s going on if we show the back faces:

5

2023-12-24_111321
2023-12-24_1113211895×1019 213 KB

Both the top and bottom should be removed. How should these broken surfaces be handled

6

You can use mesh picking to know the ids of the faces to remove (click on the faces to remove):