We could make `GeomCurve::createArc(...) = 0`, but then it needs to be
implemented in many subclasses which cannot be incomplete. It is implemented for
some of them, but others may need additional work (e.g. offsets), and would need
some exception throwing similar to what is now used.
=============================================================================================
Use the geometry specific D0 to calculate value at parameter point.
================================================
If during assignment of weights (during the for loop iteratively setting the poles) all weights
become (temporarily) equal even though weights does not have equal values
OCCT will convert all the weights (the already assigned and those not yet assigned)
to 1.0 (nonrational b-splines have 1.0 weights). This may lead to the assignment of wrong
of weight values.
The work-around is to temporarily set the last weight to be assigned to a value different from
the current value and the to-be-assigned value for the weight at position last-to-be-assign but one.
Fixes:
https://forum.freecadweb.org/viewtopic.php?p=478701#p478702
=============================================================================================
This commits removes the Geometry construction data member and adapts sketcher code to use
GeometryFacade to access construction information via the SketchGeometryExtension.
===================================
Encapsulate Part::Geometry data member copy process in a single function (copyNonTag).
Part::Geometry derived classes need not know the specifics of the data member of Part::Geometry.
Change the delegation of the copy of extensions from clone() to copyNonTag. Because clone() relies on
copy() and now copy() of Part::Geometry data member relies on copyNonTag(), there is no actual change
to the clone() functionality, but the copy() funcionality gains the copy of the extensions via copyNonTag().
+ rename getCurve2dFromGeom2d to makeFromCurve2d
+ add function makeFromCurve and makeFromTrimmedCurve like makeFromSurface
+ implement OffsetCurve.BasisCurve
+ fix memory leak in BRepOffsetAPI_MakePipeShellPy
=======================================
unique_ptr is a move only type. Therefore it may only take an rvalue.
It does not make sense a pass by value for move only types (Item 41).
