compute smd/triangle/vertices command


compute ID group-ID smd/triangle/vertices
  • ID, group-ID are documented in compute command

  • smd/triangle/vertices = style name of this compute command


compute 1 all smd/triangle/vertices


Define a computation that returns the coordinates of the vertices corresponding to the triangle-elements of a mesh created by the fix smd/wall_surface.

See this PDF guide to using Smooth Mach Dynamics in LAMMPS.

Output info

This compute returns a per-particle vector of vectors, which can be accessed by any command that uses per-particle values from a compute as input. See the Howto output page for an overview of LAMMPS output options.

The per-particle vector has nine entries, (x1/y1/z1), (x2/y2/z2), and (x3/y3/z3) corresponding to the first, second, and third vertex of each triangle.

It is only meaningful to use this compute for a group of particles which is created via the fix smd/wall_surface command.

The output of this compute can be used with the dump2vtk_tris tool to generate a VTK representation of the smd/wall_surface mesh for visualization purposes.

The values will be given in units of distance.


This compute is part of the MACHDYN package. It is only enabled if LAMMPS was built with that package. See the Build package page for more info.