scale in dc-path%
Adjusts all points within the path (including all sub-paths),
multiplying each x-coordinate by x and each y-coordinate by
y. Scaling by a negative number flips the path over the
corresponding axis. Future additions to the path are not scaled by
this call.
A path is not connected to any particular dc<%> object, so
setting a dc<%> origin or scale does not affect path
operations. Instead, a dc<%>'s origin and scale apply at the
time that the path is drawn or used to set a region.