Strange behavior with CSG.

[oschakravarthi]

Hi,

I am getting unexpected results when I work with CSG.

I am trying to do the below stuff with my model which is a flat/apartment.

1. In my model, merge all the meshes which are floors. Get a CSG.

2. foreach other mesh, if it is below 1.6 meters from any floor,

    2.1 find out its position if it is placed on the floor.

    2.2 Subtract this area from the above CSG      

 

Now the CSG will have holes. I use this CSG to create a navigation mesh so that if there is a hole, it means we cannot navigate there.

 

The same stuff is implemented in a sample. It is working fine. https://www.babylonjs-playground.com/#QSS0FZ#6

 

When I try this with real model, I am getting strange results. https://www.babylonjs-playground.com/#QSS0FZ#13

All the holes are kept one side only. The core logic in both the scenarios is exactly same. No idea why it is not coming properly

 

I have been struggling on this for more than 8 days. Can you please help me 

 

Thanks in advance

 

@trevordev, @brianzinn, @Sebavan Please help me.

 

 

 

 

 

[Sebavan]

Could you please create a smaller repro ?

It is really hard for us to work with such a large scene. It always help to have an answer quickly.

[oschakravarthi]

11 hours ago, Sebavan said:

Could you please create a smaller repro ?

It is really hard for us to work with such a large scene. It always help to have an answer quickly.

Hi @Deltakosh @TrevorJacobs @Sebavan

I changed my approach and tried a different approach but facing issues there also. Please help me in this post