Check if array of verts are planar - Maxscript

Coding
1

Hi guys,
I need to check if an array of 3 or more verts are planar.
Anybody know of an easy way to do this in maxscript or should I start burning my eyeballs with this stuff?

I’m really stuck on this one, any help would be appreciated.

2

You could create edges between all the vertices and then use the cross product to calculate a face normal vector.


edgeVector1 = verts[1].pos - verts[2].pos
edgeVector2 = verts[1].pos - verts[3].pos
normalVector = normalize(cross(edgeVector1, edgeVector2))

If all these normal vectors point in the same direction (or the exact opposite direction, or have zero length), all verts should be in a plane.

3

Hi, I had written this script a while back but didn’t share it with the community. You can get it from http://dl.dropbox.com/u/3563584/Select_NPR.mzp

Installation Instructions

* Drag and Drop Select_NPR.mzp in to 3dsMax viewport.
* From the Customize User Interface menu option you can now assign Select_NPR to a Toolbar. The command is located in the "Akira Scripts" Category.

If you find any bugs please notify me at akram2601(at)gmail.com

4

Wow,
Thanks for the help guys.
I’ll get to work right away.

5

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