how to correctly transform 3D point cloud positions

[radoslavirha]

Hi,

I'm trying to pick some points around cursor and highlight them and do some postprocessing in deck.gl.

Basically I'm trying to pick visually closest points to cursor with pickObjects which does not return WGS coordinates but points indexes.

I can find positions in object.content.attributes.positions and choose correct one by index, but I think it needs to be transformed/rotated. I'm facing similar issue than visgl/deck.gl#5714 (comment).

So how can I

1. transform position correctly, which matrix from Tile3D should I use? Is the position only offset from cartesianOrigin?
2. then transform to WGS? I found Ellipsoid.WGS84.cartesianToCartographic(transformed, new Vector3())somewhere in loaders.gl code but when I render those point with PointClouLayer it's rotated as in ^^ comment

Thanks

[ibgreen]

Yes... without having time to look into details at this time, I suspect that having some transformPoint type methods on the Tile3D helper classes for working with individual points in the tiles coordinate system cold make a lot of sense.

The matrices should all be there just having a methods that relieves the burden of figuring out how to use them from the user.

[radoslavirha]

Hi @ibgreen I created method which should return WGS coordinates of point by index. Can you help me with this? #2498

Thanks

[radoslavirha]

Hi @ibgreen,

Sorry to bother you, have you had a chance to look at my PR?

Thanks