Adds:
- QgsCoordinateReferenceSystem::createGeocentricCrs, which takes
an ellipsoid acronym and builds a matching geocentric CRS
- QgsCoordinateReferenceSystem::toGeocentricCrs, which takes
an existing CRS and returns a corresponding geocentric CRS with
the same datum/datum ensemble
* move updateZValuesFromTerrain() to QgsMeshTransformVerticesByExpression
* update widget to work with new checkbox
* move test to TestQgsMeshEditor
* fix doc
* add project to calculate()
* change version
* remove QgsExpressionContext and use QgsProject if needed
* update tests
* fix clang issue
* Apply suggestions from code review - make more readable
Co-authored-by: Stefanos Natsis <uclaros@gmail.com>
* simplify
Co-authored-by: Stefanos Natsis <uclaros@gmail.com>
* fix text
Co-authored-by: Stefanos Natsis <uclaros@gmail.com>
* add note
* add the in string
* fix bracket and indentation
* fix docstring
* use new position if necessary
* default elevation
* do not skip values, use default Z value if not properly transformed
* simplify code
---------
Co-authored-by: Stefanos Natsis <uclaros@gmail.com>
This is a mix of additions and updates for the initial support of globe mode
in 3D views within QGIS desktop app. Many things are still missing, and will
be introduced in later PRs...
When this method is selected, we show a warning icon with an
explanatory tooltip:
"This method will calculate misleading scales when the map extent
is not close to the equator, however it ensures that the scale
remains constant and does not change as the map is panned."
Always calculates the scale at the equator, regardless of the
actual visible map extent.
This method can be used to provide a consistent, static scale for
maps in geographic reference systems, regardless of the latitudes
actually visible in the map (permitting consistent appearance of
these maps when rendering relies on scale based visibility or
calculations). Otherwise a project in eg EPSG:4326 which uses
scale based visibility of layers and symbols will see layers
and features "randomly" disappear as the map is panned, even
though the user has not zoomed in or out of the map.
This method is only applicable when calculating scales with a
degree based reference system.
