is3Dpolyclockwise function

[BillW]

For testing clockwise for 2D polys you can use:     btest := GetObjectVariableBoolean(polyH,652);

There is no equivalent for 3D polys as far as I can tell. There is a marionette node "Is Clockwise 3D" written in python.

 

In a perfect world there should be variable call, perhaps   btest := GetObjectVariableBoolean(poly3DH,653);

 

I was a bit quick off the mark with a code example transposing from Python to Vectorscript. I have found some errors (even in the Marionette node which I will report).

 

Apologies, I forgot I had posted on this subject earlier (Chatgpt reminded me)

Edited September 3, 2025 by BillW

[JBenghiat]

The complication with 3D is you would have to specify a plane of reference to determine the direction.

[BillW]

I realise that. In a previous post, the plane of reference was defined by ditching the Z part of each vertex position. Having another look.

 

The example I wanted to handle in this instance, is a set of 3D polygons defining a solid form - see attached. There may be instances where the 3D poly directions are not consistent. Overall, it may be too difficult to handle all situations.

 

Thanks anyway.

 

 

d.