point cloud not fully loading

[AdrienHrdz]

in my udviz application my point cloud is not fully loaded even is the camera is close to it :

but when I do a focus in the geometry layer widget the point cloud now load properly :

[DiegoVinasco]

"this may be related to geometric error calculation in iTowns" - @LorenzoMarnat

this may also be related to #356

[valentinMachado]

We should reproduce this bug and submit it to itowns

[valentinMachado]

bug_pc.webm

I am reproducing this bug, when a wheel at the center is rolling its means tiles have been requested and have not been loaded. When I am clicking on icons its move the camera. As you can see in the video the first pov is showing a full point cloud but when i am switching the camera with different pov at some point the point cloud is not loaded... the only way to get once again the full point cloud is to reload the page.

[valentinMachado]

I've reproduced and post the issue to itowns