A single-value field that contains a mask of bit flags, stored as an integer. Nodes that use this field class define mnemonic names for the bit flags. These names should be used when setting or testing
the values of the field, even though the values are treated as integers in the methods.
The bit-wise "&" and "|" operators should be used when testing and setting flags in a mask. For example, to
turn on the sides of a 3D text node and turn off the back you would write:
text3->parts = text3->parts.getValue() |
SoText3::SIDES;
text3->parts = text3->parts.getValue() & ~
SoText3::BACK;
SoSFBitMasks are written to file as one or more mnemonic enumerated type names, in this format:
( flag1 | flag2 | ... )
If only one flag is used in a mask, the
parentheses are optional. These names differ among uses of this field in various node or engine classes. See their man pages for the names.
The field values may also be represented as integers, but this
is not guaranteed to be portable.