When the spine line of the sweep operation of the part workbench depends
on the Sketcher document, if the dependent spine line drawn by this document
is deleted afterwards, the path variable will get a null pointer.
Due to programming errors, the standard judgment of this pointer is ignored, resulting in a crash.
Call IsNull() of the OCC document to determine the legitimacy of the shape.
If it is empty, an error is reported.
Fixes#0004764
* Added Part::Feature::getTopoShape/getShape() function that can obtain
shape from any object with proper implementation of getSubObject(). It
can even construct compound from group object with proper implementation
of getSubObjects().
* Modified ViewProviderExt to work on any object, because it now obtain
the shape using Part::Feature::getShape()
* Modified various Part features to obtain base/tool shapes using
Part::getShape(), which allows them to be any type of object,
including Link and groups.
* Modified various Part command to relax type requirement on selected
objects.
* Add support of link and group to dimension, and add dimension refresh
command
* Support link and group in simple command command, and add a few more
copy command variations.
* Add special handling of 'Shape' attribute in PropertyContainerPy and
use Part::Feature::getShape() to return shape for any object without
Shape property. This allows many python feature work with any object
without modification.
* GeometrySurface/CurvePy, add convenience attribute 'Rotation'
* TopoShapePy:
* Extended support of sub shape attribute, e.g. Compound1, Solid2,
SubShape3 ('SubShape' is used to access child shape of a compound)
* makeWires(), new API to sort and return wires given a list of edges.
* transformed/translated/rotated/scaled(), return a new shape with
some transformation.
* findPlane(), find the plane of a planar shape
* isCoplanar(), check if two shape are coplanar
RuledSurface fixes,
claim children
correct tool tip
change default name from "Filled_shape" to "Ruled Surface"
Part_Mirror
Switched icon in the tool bar, menu, and tree from
the existing PNG icon to the also existing SVG icon
