What exactly is the definition of scale

[wjsjtu123]

I would like to know exactly how this scale variable should be defined and what exactly it means in the code

[ProjectPhysX]

Hi @wjsjtu123,

• lbm_length is 40% of the longest side of the simulation box (let's say 300 LBM cells long).
• fuselage->get_bounding_box_size().x is the length of the fuselage mesh, as it is loaded from .stl coordinates (could be 10 for example); the .x component here is the length because the mesh is rotated such that its length is along the x-axis
• scale is the ratio of the two
• applying scale to the fuselage mesh first divides its length by itself (fuselage->get_bounding_box_size().x) so that it now is 1 LBM cell long, and then multiplies by lbm_length to make it 300 LBM cells long
• this allows to make the mesh always the same size within the LBM simulation box, regardless how large or small it was in .stl coordinates

Kind regards,
Moritz