CloudCompare forum

Hi Daniel!
[French version below]
Hope you're doing well :)

First of all, thanks for your soft, it's great, I'm using it for registration, quick segmentation and reconstruction it's really amazing.
I've got a question!
Do you think, you'll implement "local" coordinates ? Or is it already implemented and I didn't notice it ? I've seen this :
https://github.com/CloudCompare/CloudCompare/pull/1367
But i don't really know how elaborate it is, if it does what I want and if I can tweak it to my liking!
Thanks :)

[French version]
J'espère que tout se passe bien, j'ai un ami à Grenoble aussi, il a l'air de bien se porter mais bon... On verra bien les annonces de ce vendredi étant donné que notre cher président parle!
Est-ce qu'il est possible d'avoir les coordonnées locales d'un objet ? Autrement dit, la position et rotation d'un objet relativement à un autre (donc le "Transform" d'un objet dans le repère lié à l'autre objet). Je me sers de CC pour faire de la registration et j'en aurai bien besoin pour l'exporter facilement dans Unity sans avoir à remettre tous mes modèles en 0,0,0, etc etc. Avoir le positionnement relatif me faciliterait pas mal la vie, penses tu que ce soit faisable ? J'ai vu ça:
https://github.com/CloudCompare/CloudCompare/pull/1367
Mais je ne sais pas à quel point c'est avancé et si c'est possible de build l'appli sachant qu'il y a quand même pas mal de commit en retard.

Merci beaucoup pour ton travail :)

Bien à toi,
Best regards,
Axel G :)

Hi, the 'Local coordinate system primitive' is really just a 3D object which is displayed on screen to represent a coordinate system (an origin, and 3 axes). It cannot be used (for now) to projet the coordinates to this coordinate system.

However, this object should have a 'transformation history' matrix (accessible in the entity properties). You can copy this matrix and paste it in the "Edit
> Apply transformation' tool to apply its inverse and project the points this way?

Hi !
Thanks for the quick answer.
I see the idea, let's hope it gets developped a bit more!

Yeah, right now, that's how I'm doing it, i'm using this matrix transformation in Unity (just a few lines of codes) and it works fine but since it is in global space, I need to make sure that my models are placed in the same way they were in CloudCompare else, they won't get aligned.
I'm not sure I understood what you meant by "projects the points this way" ? Can you elaborate a bit please ?
Thank you :D

Well, you can apply the matrix transformation in CloudCompare instead of Unity basically? (with the Edit > Apply transformation tool)

Since i'm using the Fine Registration (ICP) tool isn't the matrix transformation already applied?
You mean exporting the file I'm working on in order to use it in Unity?

I thought you needed to transform something in Unity after the registration (in which case you could have done it in CloudCompare). But if not, you can forget about that ;)

Thank you for you help :D
i'll keep an eye on what comes next! good luck !