57 lines
1.3 KiB
ReStructuredText
57 lines
1.3 KiB
ReStructuredText
.. index:: angle_style zero
|
|
|
|
angle_style zero command
|
|
========================
|
|
|
|
Syntax
|
|
""""""
|
|
|
|
|
|
.. code-block:: LAMMPS
|
|
|
|
angle_style zero *nocoeff*
|
|
|
|
Examples
|
|
""""""""
|
|
|
|
|
|
.. code-block:: LAMMPS
|
|
|
|
angle_style zero
|
|
angle_style zero nocoeff
|
|
angle_coeff *
|
|
angle_coeff * 120.0
|
|
|
|
Description
|
|
"""""""""""
|
|
|
|
Using an angle style of zero means angle forces and energies are not
|
|
computed, but the geometry of angle triplets is still accessible to
|
|
other commands.
|
|
|
|
As an example, the :doc:`compute angle/local <compute_angle_local>`
|
|
command can be used to compute the theta values for the list of
|
|
triplets of angle atoms listed in the data file read by the
|
|
:doc:`read_data <read_data>` command. If no angle style is defined,
|
|
this command cannot be used.
|
|
|
|
The optional *nocoeff* flag allows to read data files with AngleCoeff
|
|
section for any angle style. Similarly, any :doc:`angle_coeff <angle_coeff>` commands
|
|
will only be checked for the angle type number and the rest ignored.
|
|
|
|
Note that the :doc:`angle_coeff <angle_coeff>` command must be used for
|
|
all angle types. If specified, there can be only one value, which is
|
|
going to be used to assign an equilibrium angle, e.g. for use with
|
|
:doc:`fix shake <fix_shake>`.
|
|
|
|
Restrictions
|
|
""""""""""""
|
|
none
|
|
|
|
Related commands
|
|
""""""""""""""""
|
|
|
|
:doc:`angle_style none <angle_none>`
|
|
|
|
**Default:** none
|