Real world coordinate system

[JEDDOUB]

First of all,I want to present my sincere gratitude for your code, it is very helpful and instructive.
I am working recently on the integration and the visualisation of 2D and 3D dataset collected for exploring mining sites.I want to create a virtual tour that gather all the data in one environment and allow the user to interact and to understand the sense of scale of that data.
I have a huge dense point cloud and I tried to use your code in order to handle the problem of rendering massive point cloud but I do have a question : importing the point cloud in unity use the local coordinate system is it possible to have a real coordinate system for the point cloud so we can create an user interface that allow us to take measurements (Distance ,areas,..)?

[SFraissTU]

Hello!
In the Dynamic Point Cloud Set, there is a check box "Move Center to Transform Position". If this is checked, the center of the point cloud is moved to the GameObject's transform-position. If you uncheck it, the points should stay in the original coordinate system.
Is this helpful for you?

[JEDDOUB]

Hello,

Thank you a lot for your quick reply.

The idea for me is to point to a point using a laser pointer and have real coordinates of that point and the projection system. Basically, I am creating a virtual tour, I have a large 2D and 3D dataset including SFM point cloud and Lidar point cloud and I did a co_registration of the 2 point clouds using CloudCompare I added this to the VR scene that already includes other datasets that are in a real coordinate system and I want to know if the point cloud using the unity package read the points with their real positions or with a local coordinate system of Unity?

[SFraissTU]

Hi!
Yeah, as long as you uncheck the "Move Center To Transform Position" the real positions, that are stored in the potree-files, should be used. Did you make any other observations? Do you get points at wrong positions or scalings? Honestly, I have never checked if the point positions are actually loaded correctly, but they should be, so if they aren't that would be a bug.

[JEDDOUB]

Hey, Sorry for my late reply.

Exactly it was only a bug in unity . Now it works perfectly.

But I do have another question. As I mentioned I m working on creating a VR tour in unity using point cloud. I have successfully loaded the data with the help of your code in Unity. I create a directory folder that contains all my cloud.js files but I only want to visualize in real-time the attributes choosing via the User interface in unity. Could you please give me some orientations since the directory folder loads all the point clouds at the same time?

[SFraissTU]

Hi! I am not sure what you mean with "attributes". If you only want to load one point cloud rather than a whole directory simply use a Point Cloud Loader rather than a Directory Loader.