This node defines an infinite plane perpendicular to the Z axis,
passing through the origin, (i.e the X-Y plane). It is a
non-renderable object which appears as a 2cm x 2cm square centered
about the origin.
Sketch planes can be used as a "live" construction surface (using the
makeLive command or interactively). When live, the sketch plane
replaces the ground plane as the "surface" on which points are
placed when using one of the curve creation tools or on which
objects are moved relative to. By transforming the sketch plane,
planar curves can be created in arbitrary planes or objects can
be moved in an arbitrary plane.
A live sketch plane is drawn with an internal grid. The
planeDivisionSpacing determines the size of the grid squares. These
grid squares are further subdivided based on the number of
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