PlaneLayerTests call SurfaceArrayCreator::surfaceArrayOnPlane wrong
The PlaneLayerTests rely on the default value of the bValue parameter to SurfaceArrayCreator::surfaceArrayOnPlane, binX, which isn't right for that test as its surfaces are actually aligned on the Z axis.
This could be considered a usability defect of the surfaceArrayOnPlane API, however, as binX is a weird default (since surfaces are in the XY plane unless transformed, binZ would make more sense). Futher, it is questionable whether the bValue parameter should have a default value at all, given that the right default depends on the input surfaces.
If the bValue default of surfaceArrayOnPlane is changed/removed, then the one of dependent APIs such as LayerCreator::planeLayer should be changed as well for consistency.
Edited by Hadrien Benjamin Grasland