These are recommended for use instead of the existing force_rhr
function, due to the variability in definition of the "right hand
rule" between different software applications. Using an explicit
force_polygon_cw/ccw function removes user confusion when the
results vary between different applications.
function
If set to true and no explicit rotation center point is specified (ie
rotation happens around the geometry's center), then the rotation
is applied around the center of each part individually instead of the
geometry as a whole.
This is designed mostly to aid cases when rotate is used as a cartographic
tool as part of a geometry generator symbol layer.
Sponsored by North Road, thanks to SLYR
Applies a dash pattern to a geometry, returning a MultiLineStringi
geometry which is the input geometry stroked along each line/ring
with the specified pattern.
Rules can be set to control how the dash pattern is adjusted
at line endings. If a start rule or end rule is set, the adjustment
option defines whether both dash and gaps, or only dash or gap
sizes are adjusted to apply the rules.
An optional pattern offset can specify how far along the pattern
the result should start at.
(The offset is applied AFTER any start/end rules are applied.)
Sponsored by North Road, thanks to SLYR
Just like the 'rotate' function, 'scale' accepts an optional point
to apply the scaling from. If not specified, scaling is done
from the centre of the geometry's bounding box.
along a geometry
The new expression functions are:
- triangular_wave: Constructs triangular waves along the boundary of a geometry.
- square_wave: Constructs square/rectangular waves along the boundary of a geometry
- wave: Constructs rounded (sine-like) waves along the boundary of a geometry
- triangular_wave_randomized: Constructs randomized triangular waves along the boundary of a geometry
- square_wave_randomized: Constructs randomized square/rectangular waves along the boundary of a geometry.
- wave_randomized: Constructs randomized curved (sine-like) waves along the boundary of a geometry
* mesh expression $vertex_as_point $vertex_Z_value
* functions help
* SIP, doc and indentation
* fix SIP
* fix help file
* change function name and add Meshes group description
* fix typo
* fix strings and docs
* typo
Added explanation what this new expression actually calculates, based on help coded in /src/core/geometry/qgscurve.h
Also streamlined noted requirement that needs to be applied to a curve.
Added description of what syntax/parsing engine is used for the formatting. Motivated by https://github.com/qgis/QGIS/issues/42806, but in general a good idea so users can look up more in detail what is possible. Also uniformized spelling (placeholder vs placeholder).
