| orbl (filter) |
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orbl (filter) — A constraint on orientability
| Content Model | |
orbl ::= | |
| Attributes | |
| Name | Type |
value | CDATA (required) |
An orbl (filter) element represents a constraint on the
orientability of a normal surface.
The following elements contain orbl (in the
context of a constraint on surface properties):
filter (properties).
valueContains the specific constraint upon the orientability of a surface. The following values are allowed.
TF signifies that the surface may be either
orientable or non-orientable, i.e., no constraint is imposed.
T- signifies that the surface must be
orientable.
-F signifies that the surface must be
non-orientable.
-- signifies that the surface must be neither
orientable nor non-orientable, i.e., no surfaces are accepted.
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