69 lines
1.8 KiB
ReStructuredText
69 lines
1.8 KiB
ReStructuredText
.. index:: compute smd/triangle/vertices
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compute smd/triangle/vertices command
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=====================================
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Syntax
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""""""
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.. code-block:: LAMMPS
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compute ID group-ID smd/triangle/vertices
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* ID, group-ID are documented in :doc:`compute <compute>` command
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* smd/triangle/vertices = style name of this compute command
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Examples
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""""""""
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.. code-block:: LAMMPS
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compute 1 all smd/triangle/vertices
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Description
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"""""""""""
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Define a computation that returns the coordinates of the vertices
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corresponding to the triangle-elements of a mesh created by the :doc:`fix smd/wall_surface <fix_smd_wall_surface>`.
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See `this PDF guide <PDF/MACHDYN_LAMMPS_userguide.pdf>`_ to using Smooth
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Mach Dynamics in LAMMPS.
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Output info
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"""""""""""
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This compute returns a per-particle vector of vectors, which can be
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accessed by any command that uses per-particle values from a compute
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as input. See the :doc:`Howto output <Howto_output>` page for an
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overview of LAMMPS output options.
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The per-particle vector has nine entries, (x1/y1/z1), (x2/y2/z2), and
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(x3/y3/z3) corresponding to the first, second, and third vertex of
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each triangle.
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It is only meaningful to use this compute for a group of particles
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which is created via the :doc:`fix smd/wall_surface <fix_smd_wall_surface>` command.
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The output of this compute can be used with the dump2vtk_tris tool to
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generate a VTK representation of the smd/wall_surface mesh for
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visualization purposes.
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The values will be given in :doc:`units <units>` of distance.
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Restrictions
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""""""""""""
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This compute is part of the MACHDYN package. It is only enabled if
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LAMMPS was built with that package. See the :doc:`Build package <Build_package>` page for more info.
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Related commands
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""""""""""""""""
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:doc:`fix smd/move/tri/surf <fix_smd_move_triangulated_surface>`,
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:doc:`fix smd/wall_surface <fix_smd_wall_surface>`
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Default
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"""""""
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none
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