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start_define
excavation_0 geometry_quadrilateral counter_a
end_define
start_define
excavation_1 geometry_quadrilateral counter_a
end_define
start_define
excavation_2 geometry_quadrilateral counter_a
end_define
start_define
excavation_3 geometry_quadrilateral counter_a
end_define
start_define
excavation_4 geometry_quadrilateral counter_a
end_define
excavation_0 0.0 7.0 3.0 7.0 0.0 8.0 3.0 8.0 eps_geometry
excavation_1 0.0 6.25 3.0 6.25 0.0 8.0 3.0 8.0 eps_geometry
excavation_2 0.0 5.0 3.0 5.0 0.0 8.0 3.0 8.0 eps_geometry
excavation_3 0.0 4.0 3.0 4.0 0.0 8.0 3.0 8.0 eps_geometry
excavation_4 0.0 3.0 3.0 3.0 0.0 8.0 3.0 8.0 eps_geometry
Here five geometry_quadrilateral are defined, which will be used for the excavations. Please pay close attention how the coordinates of the quadrilaterals are specified; for excavation_0 the first coordinate is 0.0 7.0, the second coordinate is 3.0 7.0, the third coordinate is 0.0 8.0 and finally the fourth coordinate is 3.0 8.0. If you would specify these coordinates in another order you get false results for the excavations.