topic Re: Project Points on Line in Fusion Design, Validate & Document Forum

Project Points on Line

Anonymous — Tue, 30 May 2017 08:20:48 GMT

Hello,

I'm using Fusion360 and would like to project points of one sketch onto a line / curve of another sketch. Both sketches are in the same plane.

Thank you

Re: Project Points on Line

Mike.Grau — Tue, 30 May 2017 08:46:37 GMT

Hi @Anonymous,

Thank you for asking about that.

Yes, that should be possible by using the Project/Include features under the Sketch ribbon.

You just need to create a new sketch, perpendicular to the current view / screenshot, and project the features you need.

I hope this helps.

Please, keep me updated.

Thanks,

Re: Project Points on Line

Anonymous — Tue, 30 May 2017 09:00:30 GMT

Thank you Mike,

yes that works fine for a straight line but not with a spline curve where I would have to project every point along a different vector (perpendicular to the spline).

What I basically have is a scatter-plot with thousands of points and a complex sketch with many curves that run through the scatter-plot and I would like to project those points onto the sketch.

Thanks again for your help!

Re: Project Points on Line

davebYYPCU — Tue, 30 May 2017 09:05:19 GMT

Edit the sketch with the Line in it,

Draw vertical lines from those points Fusion will snap to them, (they will be purple points in this sketch) they will be projected into the Line Sketch, all in the same manouvre.

Might help...

Re: Project Points on Line

davebYYPCU — Tue, 30 May 2017 09:12:04 GMT

Ok, Second Senario,

Still need the receiving sketch active, then Use Project > Entities and window select all the points, they will all be Projected prependicular to the Current Sketch (plane).

On your own for Perpendicular to the Spline handle, sorry, thats outa my League.

Re: Project Points on Line

Mike.Grau — Tue, 30 May 2017 09:20:00 GMT

Hi @Anonymous,

Thank you for the update.

We could try to achieve this through a work around and work a bit in the patch environment.

1. Create a Patch ( Surface )

2. Project the points to the Surface

3. Redraw the Spline.

I´m not sure if I really got what you are looking for.

Could you may share a Public Link / Screencast with us that we do better understand what you would like to achieve?

Thank you,

Re: Project Points on Line

Anonymous — Tue, 30 May 2017 10:04:33 GMT

Thank you @davebYYPCU and @Mike.Grau,

I'm still working on this project and don't have a proper example yet, but ultimately I'm trying to do the following:

I have a scatter plot extracted from an image. Ultimately it will be a high resolution image of a 3D printed part taken from the top.

Now I want to compare the points from the scatter-plot with the real CAD model of that part. Basically measuring the deviation of the 3D print from the CAD file, layer by layer.

Therefore I thought i could project all the points onto the sketch from the CAD model and compare the two datasets.

The blue spline in the middle is the sketch of the CAD model and the points are from the image taken from the printed part.

(The image below serves just as an example. The deviation here is mainly caused by low resolution which I will prevent later on.)

I hope I could make it clear what I'm trying to do.

Thanks again!

Re: Project Points on Line

davebYYPCU — Tue, 30 May 2017 10:53:46 GMT

Sorry, I am not understanding your intentions,

The way I read it, this last pic, is a top view of a small part of the object,

If those white points are where the printer goes from the STL or Gcode, point to point, I can see a very low resolution of the same shape from the white dots.

The first pic in this thread, how does that fit this scenario, seeing as you want to measure the error distance,

the Measure tool would have done that without the Project to the Line/Plane question, but it is one at a time, you may need an API script writer......

Re: Project Points on Line

Mike.Grau — Tue, 30 May 2017 12:06:24 GMT

Hi @Anonymous,

Thanks for sharing this picture.

Could you extrude the spline in the patch environment
Project the points to the Surface
and measure the distance between the points

I hope this helps.

Thanks,

Re: Project Points on Line

Anonymous — Tue, 30 May 2017 14:27:46 GMT

Hello @davebYYPCU,

sorry for my late response.

Yes this is a top view of a small part of the object.

The white dots show what the printer has done. These are extracted from an image of the print, which I converted into a .csv file where every pixel corresponds to one white dot. By projecting the white dots onto the target shape (blue spline) I can create a new set of dots (the ideal shape) which i can now compare with the white dots by exporting a new .csv file.

I will look into the measure tool. If it could measure the distance from the spline for every point and export those values, that would be ideal. But I have never worked with an API script writer yet...

And thank you for your input!

Re: Project Points on Line

Anonymous — Tue, 30 May 2017 14:30:19 GMT

Yes that works in the Patch environment. Thank you!

Re: Project Points on Line

Mike.Grau — Tue, 30 May 2017 15:13:02 GMT

Hi @Anonymous,

Thanks for the update.

I´m glad that I could help you.

Thank you and all the best