topic Re: Create circle using 3 points via script in Fusion API and Scripts Forum

Create circle using 3 points via script

fredrikcarlssonnlm — Mon, 08 Apr 2024 11:24:38 GMT

Hey

We want to create a circle using 3 points in a 3 dimensional space using scrips in Fusion360.

I dont find any fucntion for this.

There is alot of functions to create circles but not to create a circle from 3 points.

Fredrik

Re: Create circle using 3 points via script

kandennti — Mon, 08 Apr 2024 13:39:45 GMT

Hi @fredrikcarlssonnlm -San.

Try using the addByThreePoints method.

# Fusion360API Python script import traceback import adsk.core as core import adsk.fusion as fusion def run(context): ui: core.UserInterface = None try: app: core.Application = core.Application.get() ui = app.userInterface des: fusion.Design = app.activeProduct root: fusion.Component = des.rootComponent skt: fusion.Sketch = root.sketches.add( root.xYConstructionPlane ) skt.sketchCurves.sketchCircles.addByThreePoints( core.Point3D.create(1,0,0), core.Point3D.create(2,1,2), core.Point3D.create(0,1,-1), ) except: if ui: ui.messageBox('Failed:\n{}'.format(traceback.format_exc()))

Re: Create circle using 3 points via script

fredrikcarlssonnlm — Mon, 08 Apr 2024 13:43:13 GMT

Have you tried this function?

Seems to be coming directly from ChatGPT?

We do not get this to work currently and have already tries this sadly.

Re: Create circle using 3 points via script

kandennti — Tue, 09 Apr 2024 00:55:15 GMT

@fredrikcarlssonnlm -San.

It is running fine in my environment.

Fusion360 Ver2.0.18719

ms_python v2023.20.0

Re: Create circle using 3 points via script

BrianEkins — Tue, 09 Apr 2024 01:50:08 GMT

addByThreePoints is not a method imagined by ChatGPT. Here's the official Fusion documentation for it.

https://help.autodesk.com/view/fusion360/ENU/?guid=GUID-bb94f635-2b1f-4ee2-ad64-dc2418a8584a

Re: Create circle using 3 points via script

fredrikcarlssonnlm — Tue, 09 Apr 2024 05:51:03 GMT

Thanks!

I will try this directly!

Re: Create circle using 3 points via script

fredrikcarlssonnlm — Tue, 09 Apr 2024 05:53:17 GMT

Does this work with 3 dimensional points?

All the points are on the same construction plane but they dont have the same x,y or z cordinate.

Re: Create circle using 3 points via script

kandennti — Tue, 09 Apr 2024 08:06:20 GMT

@fredrikcarlssonnlm -San.

If there are three points in a straight line, you will probably get an error, but otherwise it is fine.

Re: Create circle using 3 points via script

BrianEkins — Fri, 12 Apr 2024 05:49:47 GMT

It does work in 3D space. It uses the coordinate system of the sketch. All sketches are 3D; it's just that we usually only draw on their X-Y plane, but they support geometry that exists outside that plane.

If your coordinates are with respect to model space, you can use the Sketch.modelToSketchSpace method to convert the model space coordinates into sketch space coordinates and then use themto create your circle.