Chimera Commands Index
Usage:
angle atom1 atom2 atom3 [ atom4 ]
Usage:
angle object1 object2
The angle command measures angles:
- formed by three atoms
- formed by four atoms (dihedral angle)
- between two geometric objects (two axes, two planes, or one axis and one
plane) created with define or
Axes/Planes/Centroids
Any atom specification
that gives the proper number of atoms can be used.
The order of specification is important, but atoms need not be connected.
Objects are specified by ID as shown in the
Axes/Planes/Centroids table.
For angle measurements, axes and planes are treated as infinite.
The angle value in degrees is reported in the
status line and
Reply Log.
Three or four atoms can be
specified collectively using the word selected, sel, or
picked if the current selection
contains only those atoms; the
order in which the atoms were selected
(most likely picked) is used.
When order information is lacking
(for example, the atoms were selected simultaneously),
the angle actually measured may not be the one intended.
The angle command provides a static measurement;
changes are not reported automatically.
Angles formed by atoms can be monitored continuously using the
Angles/Torsions panel.
See also:
rotation,
distance,
define