[Point Cloud] Vertical 3D measures

[jonnyforestGIS]

Checklist before submitting

• Search through existing issue reports and gis.stackexchange.com to check whether the issue already exists
• Test with a clean new user profile.

Describe the bug
Point cloud disappears in 3D View or gives a Qt error: camera Position got Nan, after trying to do a 3d measurement in Z (Vertical) coordinate (for example measure a tree height).

If a do a 3D measure on the terrain (horizontal) I don't receive any error.

Additionally, the values from measures aren't stored in the measurement temporary layer giving a QT error Retrying to obtain clipboard.

How to Reproduce

1. Add a point cloud
2. offset the point cloud (in my case -258).
3. Add a 3D View
4. Create a 3D Measure
5. Click New and try to do a 3d measure in point cloud

QGIS and OS versions
Testing the new installer.
https://www.lutraconsulting.co.uk/blog/2021/02/15/qgis-point-cloud-windows/

QGIS version	3.17.0-Master	QGIS code revision	93239b1
Compiled against Qt	5.15.2	Running against Qt	5.15.2
Compiled against GDAL/OGR	3.2.1	Running against GDAL/OGR	3.2.1
Compiled against GEOS	3.9.1-CAPI-1.14.2	Running against GEOS	3.9.1-CAPI-1.14.2
Compiled against SQLite	3.33.0	Running against SQLite	3.33.0
Compiled against PDAL	2.2.0	Running against PDAL	2.2.0 (git-version: 38aa11)
PostgreSQL Client Version	13.0	SpatiaLite Version	5.0.1-rc1
QWT Version	6.1.3	QScintilla2 Version	2.11.5
Compiled against PROJ	7.2.1	Running against PROJ	Rel. 7.2.1, January 1st, 2021
OS Version	Windows 10 Version 2009	This copy of QGIS writes debugging output.
Active python plugins	processing

[PedroVenancio]

I confirm this behaviour @jonnyforestGIS , also on Linux.

[roya0045]

Maybe @ismailsunni or @NEDJIMAbelgacem would have a clue.

[wonder-sk]

Measuring on point clouds is not supported yet unfortunately... (The "horizontal" measuring works just because the measure tool ends up picking points from the terrain under the point cloud.)

[saberraz]

With the profile tool and support for measuring tools, this ticket is redundant.

[jonnyforestGIS]

Hi @saberraz for me make sense. If everyone agree I can close this. Cheers

[nadir-advian]

Any update regarding this?