Virtual point clouds overview in 2D (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#59854
Author: @Withalion
QGIS version: 3.42

Virtual point clouds overview in 2D

PR Description:

Description

This PR changes the default behaviour of VPC rendering. We switch from rendering extents when zoomed out to rendering overview when it's present. This change adds seamless transition between overview into specific point clouds. Furthermore the user is able to switch between just extents, just overview and extents rendered over overview, by using combo box in layer styling side panel.

Screencast_20241212_142233.mp4

The label settings were also moved together with zoom out behaviour settings into new Virtual point cloud options QgsCollapsibleGroupBox. Which is visible only when dealing with virtual point clouds styling.

Note: When I dealt with setting the default Qgis::PointCloudZoomOutBehavior for layer renderer I noticed that the renderer is actually created multiple times!

• First time the renderer gets created in QgsPointCloudLayer::setDataSourcePrivate, which is called by constructor
  https://github.com/qgis/QGIS/blob/fb501d573438bd6c68467638c6b9955f90914fab/src/core/pointcloud/qgspointcloudlayer.cpp#L467-L487
• Second time the renderer is created by QgsAppLayerHandling::postProcessAddedLayer
  https://github.com/qgis/QGIS/blob/fb501d573438bd6c68467638c6b9955f90914fab/src/app/layers/qgsapplayerhandling.cpp#L187

Note 2: The layer has to be readded into the project for qgis to apply the default behaviour.

Funded by: Klimadatastyrelsen

Commits tagged with [need-docs] or [FEATURE]