Creating Plane through 3 Points in featureScript

shane_poole

Does anyone have any tips for creating a new plane through 3 points. Have not had any luck with all test attempts of cPlane, opPlane, etc.

var b = vector(32, 56, 0) * millimeter;

var a = vector(88, 0, 0) * millimeter;

var c = vector(88,56,50) * millimeter;

var _origin = (a+b+c)/3;

var _normal = cross((c-a), (b-a));

var newplane = plane(_origin, _normal);

This at least creates a plane just not the correct one...
Any tips appreciated!

shane_poole

Points relative to origin (0, 0, 0)

ilya_baran

Really?  That looks correct.  Posting a link to a version of a shared document would help debug this, if indeed it's the wrong plane.

shane_poole

https://cad.onshape.com/documents/11f1f74e63898bb0b1ae14a8/w/bb9088dbaaca4b42f8c9781d/e/54d257c401738ccd728f6f80

shane_poole

Attempting to create plane ABC

ilya_baran

It looks like the plane is correctly going through a b and c and the points themselves are in the wrong place.

shane_poole

Alright, I will try and rework the points. Thanks for taking a look!

shane_poole

Looks like I got some of the y and z coordinates mixed up, correct plane would be:
a = (32, 0, 56)
b = (88, 50, 56)
c = (88, 0 ,0)

billy2

Would be nice to have world origin & coord.

Y is into page.

shane_poole

Yes my original coordinates were with respect to the front plane (my error), basing them relative to the top plane fixed the issue.

billy2

I was having a hard time keeping it straight and getting the coordinates correct. Looking at the triad helped me follow along.

Added triad as a visual guide.

Welcome to Onshape.