SaveMotion: xpos and zpos
For example looking at examples/mdbc/07_WavesCylinder, I see xpos and zpos being given as xpos = 2.2 and zpos=-0.1.
I understand xpos = 2.2 since it is the middle of the cylinder, but I do not understand zpos completely. In the XML guide it is defined as "zpos=-depth", so if depth = 0.5, then by default zpos=-0.5, which means that we measure the analytical solution at the seabed?
But when zpos is then defined as zpos = -0.1, then we set the zpos outside the water surface?
Could anyone explain it to me?