Name

orbl (surface) — Is a normal surface orientable?

Synopsis

Content Model
orbl ::=
Attributes
NameType
valueNUMBER (required)

Description

An orbl (surface) element stores whether or not a normal surface is orientable.

Parents

The following elements contain orbl (in the context of the orientability of a normal surface): surface.

Children

Element orbl (in the context of the orientability of a normal surface) has no children.

Attributes

value

Either 1, -1 or 0. Value 1 signifies that the parent surface is orientable, value -1 signifies that the parent surface is non-orientable and value 0 signifies that the orientability of the parent surface is still unknown.