Understanding the gp:recalcPolyCorners Function
key to understanding how gp:recalcPolyCorners works
is to revisit the diagram showing what the key values of 12 through
the diagram, the user moved the corner point associated with the
key value of 14. This means the corner points associated with 13
and 15 need to be recalculated.
Point 15 needs to be moved along the current
vector defined by point 12 to point 15 until it lines up with the
new point 14. The vectors from 12 to 15, and from 14 to 15, must
be perpendicular to each other. The same operation must be applied
to recalculate the new location for point 13.
take another look at the code to see if it makes sense.