Rigid constraints are defined using the command `PROPERTY BOUNDARY CONSTRAINT'. The user supplies a degree of freedom indicator (eg. 1234) to indicate which degrees of freedom are to be constrained. The names of the degrees of freedom and the degree of freedom macros that may be used are shown in table below.
Degree of freedom name Meaning 1 or X x-translation
2 or Y y-translation
3 or Z z-translation
4 or RX x-rotation
5 or RY y-rotation
6 or RZ z-rotation
XSYMM x-translation, y,z-rotations
YSYMM y-translation, x,z-rotations
ZSYMM z-translation, x,y-rotations
ALL x,y,z-translations, x,y,z-rotations
XASYMM x-rotation, y,z-translations
YASYMM y-rotation, x,z-translations
ZASYMM z-rotation, x,y-translations
ENCASTRE x,y,z-translations, x,y,z-rotations
PINNED x,y,z-translations
NOROTATE x,y,z-rotations