topic Re: Point Cloud - Rotate Z and Y axis in Modeling

Point Cloud - Rotate Z and Y axis

Atort — Sun, 19 Dec 2021 12:57:12 GMT

Hi. I am using the iPhone to create point clouds for small rehabilitation works. I am testing the apps 3dscanner, Canvas and Modelar. With all of them I have the same problem: When exporting to .e57 or .xyz, the Y and Z axes not only do not have the position exchanged, but also, they are placed in mirror.
I have used Cloud Compare with the .xyz import and swapped the z and y axis. That's easy, but changing the sign to avoid mirroring, I don't know how to do it. Any idea?
BTW... wouldn't it be easier if this could be done with the library object inside Archicad?
(Another suggestion for the "wish list")

Re: Point Cloud - Rotate Z and Y axis

Christophe Fortineau — Mon, 20 Dec 2021 10:37:41 GMT

Hello Atort,

Why do not you import e57 into Archicad from Cloudcompare ?

You can use this tool to rotate all object so pointcloud too :
https://bimcomponents.com/GSM/Details/9125

I have never seen a mirror effect between cloudcompare and Archicad but I am ready to test your file to understand your concerns and find the best solution.

Re: Point Cloud - Rotate Z and Y axis

Atort — Mon, 20 Dec 2021 17:28:49 GMT

Yes!

Rotator.gsm solved it. Easy to use and straight to the point I needed.

Thanks a lot, Christophe!

Just in case anyone may need it, this is the workflow I followed:

iPhone 13 Pro Max (iOS15.2) + 3DScanner App (Build 1.9.5) -> Scan the space needed
Option Share Model -> Point Cloud -> XYZ color, space delimited (You may also use .e57 or XYZ Color, but I got better results with this option).
Archicad 25 (24 also tested and ok) File/Interoperability/Import Point Cloud
Rotate.gsm: Enter the library part name of the object needed to rotate in the "Name of library part to rotate" parameter field.
Rotation parameters: X:0º, Y:90º, Z:90º
Voilà!

Re: Point Cloud - Rotate Z and Y axis

SenecaDesignLLC — Mon, 20 Dec 2021 18:17:17 GMT

It's also simple to open the point cloud object and add to the 3d script

Rotx 0

Roty 90

Rotz 90

Re: Point Cloud - Rotate Z and Y axis

Strawbale23 — Sun, 02 Jan 2022 17:35:24 GMT

Hi Atort,

I have started looking at scanning (iphone pro or similar) for renovation projects.

Can you give your impressions on how succesful it is in practice?

Thank you.

Re: Point Cloud - Rotate Z and Y axis

Atort — Sun, 02 Jan 2022 18:21:45 GMT

Hi,
Most of my professional activity as an architect is focused to the reform and renovation of houses in the countryside and also for interior design works.
For this type of projects, the use of an iPhone (13 Pro Max) solves perfectly the data acquisition. Its accuracy is more than enough for me (distortion no more than 2%).
The recommended distance to obtain the scan is no more than 4 or 5 meters.
You have to try which software best suits your needs. I have tried several and, finally, the two I use are "3d Scanner App" and "Modelar".
Anyway, if the building you have to intervene on is large or complex, my advice is to hire a specialist with a Faro or Leika equipment, combined with a survey from a total station.

Re: Point Cloud - Rotate Z and Y axis

Strawbale23 — Sun, 02 Jan 2022 18:35:42 GMT

Thank you.

My projects are often very old buildings in the countryside here in France. The geometrics can be a challenge sometimes because nothing is square or straight and this seems like a good solution.

Yes, I was wondering if for small and simple projects an iphone would suffice.

Thanks for the info.

Re: Point Cloud - Rotate Z and Y axis

Atort — Sun, 02 Jan 2022 18:54:51 GMT

Yep, that's why I was trying to find an easier way to take my own data from a portable device, easy to use and introduce data into my Archicad models.

I've started a few weeks ago and the results are fine enough for me. We're trying to optimize our workflow but I'm sure we'll get used to this new process very soon.

Re: Point Cloud - Rotate Z and Y axis

markm — Wed, 20 Apr 2022 12:40:00 GMT

Just FYI, the new version of Modelar (1.7.1) keeps the data in a right-handed coordinate system when exporting clouds and meshes with Z up, which will hopefully help with your mirroring issue. Please feel free to reach out to info@modelar.ai if you're still having trouble!