Point cloud LOD - Cesium 3D Tiles from FME

CesiumJS
1

Hi, I have exported a point cloud as Cesium 3D tiles from FME. I got a set of .pnts files and a tileset.json.

I’m facing two problems.

  1. Is there s way to specify LOD levels? Right now, everything is loaded at once.
  2. Points are jumping around. Very clear when you zoom in.

Demo: https://easydigital.se/pointcloud/

Any guidance would really be appreciated, thanks!

2

Hi @ariel,

on 1:
Sadly, the FME writer for Cesium points / 3dtiles is very rudimentary and doesn’t allow many features Cesium Ion does. For 3dtiles, you can create a attribute called “cesium_priority” which defines the order of rendering. I dont know, if this attribute is functional for the points writer, too.

on 2:
At least for me, everything is fine with your point cloud.

Best, Lennart

3

I will have closer look att the cesium priority attribute.

About the jumping points. Its only visible when zoomed in very closely.

Many thanks Lennart!

4

@lennart.imberg

Thank you for the suggestion! @ariel be sure to reach out if you have any lingering questions or concerns.

-Sam

5

As @lennart.imberg pointed out, the fme 3d-tiles transformer is very rudimentary. Did some tests with Agisoft Metashape with really promising results.

2 Likes
6

@ariel

I am happy to hear that you have gotten some promising results with Agisoft Metashape.

-Sam

7

@ariel Thanks for the info about Agisoft Metashape. I will do some testing, too.

1 Like
8

@lennart.imberg

Great :+1: Please keep up posted!

-Sam