Removes duplicate nodes from the geometry, wherever removing the
nodes does not result in a degenerate geometry.
By default, z values are not considered when detecting duplicate
nodes. E.g. two nodes with the same x and y coordinate but
different z values will still be considered duplicate and one
will be removed. If useZValues is true, then the z values are
also tested and nodes with the same x and y but different z
will be maintained.
Note that duplicate nodes are not tested between different
parts of a multipart geometry. E.g. a multipoint geometry
with overlapping points will not be changed by this method.
The function will return true if nodes were removed, or false
if no duplicate nodes were found.
Includes unit tests and a processing algorithm which exposes
this functionality.
Now instead of mixing bools/numeric returns, we always use
ints, where:
-1 = left
0 = test failed, e.g. point on line
1 = right
Also fix a bunch of extra issues identified with left of tests
as a result of these changes
- Fix loss of coordinates when not rounding a particular dimension
- Don't segmentize curved geometries
- Add extra unit tests
- Make createEmptyWithSameType() protected and skip from Python bindings.
This method relies on low-level manipulation of the returned geometry
which we do not want to expose as public/fixed API
Faster than QgsGeometry::isGeosEmpty() because it avoids the
conversion to GEOS geometries and just uses the QgsAbstractGeometry
subclasses directly.
Also implements faster isEmpty() overrides for specific
QgsAbstractGeometry subclasses.
