Data part, beam geometries

start_define
beam_point geometry_point counter_a
end_define
start_define
beam_line geometry_line counter_a
end_define
start_define
beam_short_line geometry_line counter_a
end_define

beam_point 3.0 6.75 eps_geometry
beam_line 3.0 2.0 3.0 8.0 eps_geometry
beam_short_line 3.0 2.01 3.0 8.0 eps_geometry

The beam_point defines the position of point A. With beam_line we define a geometrical line completely along the sheet-pile, which will be used to automatically generate truss-beam elements and contact springs. The beam_line_short defines a geometry line a bit shorter than the sheet-pile; the purpose of this short line will become clear later.

The counter_a is a convenient way to give a unique index to each geometry, without keeping tack of used numbers for indices yourself. Initially the counter_a is 0, and each time it is used it will be automatically incremented with 1 by Tochnog. So here beam_point geometry_point counter_a is be read as beam_point geometry_point 0, beam_line geometry_line counter_a is read as beam_line geometry_line 1, etc. Since we later only will refer to the defined words beam_point, beam_line, etc. those will be read as geometry_point 0, geometry_line 1, etc. at each occurrence, and there is no need to know the specific indices that are used.