The Symmetry options
preserve an object’s symmetry around a plane that you specify.
When one of the Symmetry
options is active, ProOptimizer looks for symmetrical pairs of edges.
When it finds a symmetrical pair, it applies the same optimization
on either side of the plane.
These options work best
if the object is truly symmetrical; for example, if it was originally
created by mirroring. If ProOptimizer cannot detect symmetry about
the plane you specify, it optimizes the object as it normally does.
Points that lie on the
plane itself are frozen (not optimized), because they are symmetrical
Some 3ds Max Design objects
appear to be symmetrical but are not; for example, a surface of
revolution created by the Lathe modifier. In this case, although
the overall geometry is symmetrical, edges all have the same orientation
in the direction of revolution, so when bisected by a plane, opposite
edges face in opposite directions. In this case, ProOptimizer cannot detect
symmetry, and optimizes according to the usual method.
ImportantThe controls on this
rollout are not interactive. If you change
a setting, the Status window on the Optimization Level rollout displays
“Optimization Invalid,” and you must click Calculate once again
to see the result of changing the option value.
- No Symmetry
(The default.) ProOptimizer
does not attempt to make symmetrical optimizations.
- XY Symmetry
to make optimizations symmetrical about the XY plane.
- YZ Symmetry
to make optimizations symmetrical about the YZ plane.
- XZ Symmetry
to make optimizations symmetrical about the XZ plane.
Specifies a tolerance value
for detecting symmetrical edges. In some models, the position of
symmetrical edges might not be precise; for example, roundoff error
might have caused small discrepancies in position values. Increasing
the Tolerance value can correct this problem. Default=0.0.