This numeric format allows users to craft a custom QGIS expression
to format numbers. The expression can use the @value variable
to retrieve the value to be formatted, and then use any standard
QGIS expression function to format this as desired.
It can be used anywhere QgsNumericFormat is accepted, eg layout
scalebars, elevation plots, layout tables, and color ramp
legends
Sponsored by the Swiss QGIS User Group
Create a small, cheap to copy (non-qobject) class
Qgs3DMapSettingsSnapshot which is designed to store
just cheap properties of Qgs3DMapSettings. Then use this
object wherever possible to avoid accessing the (non-thread
safe) Qgs3DMapSettings object for retrieval of simple
map properties (eg crs, extent, ...)
Refs https://github.com/qgis/QGIS-Enhancement-Proposals/issues/301
This method attempts to interpolate the point on a linestringM
where a specified m value falls. It does this by interpolating
M values along the line string segments, finding the first
segment at which the target M value falls. If the M value
corresponds to a part of the line with constant m values, then
the center point of this constant m value portion will be
returned.
The simplification MUST be applied prior to transforming geometries,
or the precalculated simplification tolerance will no be correct
and may be excessive (eg when the simplification tolerance
was calculated for a map in meters, yet the rendered layer is
in degrees -- in this case we would simplify the inverted geometry
with a tolerance of ~1 degree!)
Ensure that we apply the simplification FIRST, then transform,
and disable further simplification when rendering the calculated
inverted feature. This is also a performance boost, because we
are simplifying geometries prior to transforming + calculating
the inversion, so usually end up with a lot less vertices
to handle in those operations...
