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