3D Measurement Tool

[ismailsunni]

This feature is part of the GSoC 2019 - QGIS 3D Improvement

Currently, QGIS has a measuring tool in 2D but not in 3D view. I will implement the measuring tool in the 3D view with the z (height) value consideration. The point that will be taken into account is in the one on the foremost object in the 3D view.

The workflow and the features will be more or less the same as the 2D measuring one, but in this case for 3D. The workflow would be user click the starting point and then click to the next point and QGIS will show the distance (or sum of the distances).

[ismailsunni]

Rendering issue:

The measurement line is the green one. The red line is the normal 3D line. The problems:

• Only render as 2D line
• Rendered using random color each
• The line will be gone if I hide/show another line

[ismailsunni]

Replicating 2D map tool dialogs:

• [x] show segment's length and total distance
• [x] close dialog --> restart
• [x] right click --> end measurement
• [ ] show help (postponed)
• [x] unit handling
• [x] map tool switch
• [x] new button
• [x] configuration
• [x] info
• [x] delete last point
• [x] crs changed

[ismailsunni]

Sample measurement tool on the action:

[ismailsunni]

The feature is merged to QGIS.