[Closed] Reproduce "Allow Upside Down" option with Maxscript

Hi everyone

I’m trying to distribute an object on a spline shape playing with matrix transform.

If I can easily get the direction vector and the position of a point on a spline, I always get my object flipping.

I know that when using the PathConstraint parameter we are faced with the same problem except if you check the “Allow Upside Down” option.

But what does it actually ? how to get the same resulting matrix using maxscript ?

I’m kind of lost with that…

Thx a lot for you time

Ps : Path constraint doesn’t work with mutliple spline into a single spline shape … that’s why I can’t just use it.