Stacked 3D meshes store values on the volumes that are regularly stacked over base 2d mesh. User can select various 3d to 2d averaging/interpolation method to convert values on volumes (3d) to values on faces (2d) that can be shown in mesh layer. This is achieved by new tab in the mesh layer properties dialog.
* [FEATURE] Selective masking
Advanced rendering feature that allows the definition of 'masks' areas around labels or with a new typ of symbol layer. These masks will "un-draw" symbol layers of other layers underneath.
It modifies the rendering process by adding an optional second pass.
- Add QgsDataDefined class
- Add QgsDataDefinedButton class
- Add data defined Python support
- Add standalone SVG selector dialog to QgsSvgSelectorWidget class
- Fix for #4607, show only pertinent fields when setting a data defined value
- Fix for #5048 and #5049, data defined settings are literally used
- Fix for #5726, number formatting does not work for expressions
- Fix for #7755, using bufferSize to enable/disable label buffer is confusing
- Fix for #7779, labels do not register in label collision engine; and for #4719, inactive options in labeling dialog
- Prepare label text's expression upfront when preparing layer; makes rendering much faster
- Change name of 'feature obstacles' to appropriate terminology
- Following subsections still need work: Labeling (ng), Diagrams and possibly more on Style
- Add new SVG icons for Labels, Display and Metadata tabs
- Add up/down, plus/minus icons for consistency
- Move Metadata tab to bottom of list for vector and raster layer property dialogs
- Update report stylesheet (metadata output) to support direct RTF copy/paste (i.e. black-colored fonts)
- Update report stylesheet to use light gray backgrounds for headers instead of unpredictable highlight color
