relDepthStart defines the forward location of the beginning of the rib set. 0 equals the forward end of the pylon box, while 1 equals the rear end of the pylon box.
relDepthEnd defines the rear end. 0 equals the forward end of the pylon box, while 1 equals the rear end of the pylon box.
Ribs can be rotated in the side view. The defaults to 90°, which equals an orientation along the pylons z-axis. The angle is meassured around the positive y-direction of the pylon.
RibNumber defines the number of ribs in this ribSet. First rib is at relDepthStart along the pylons x-axis, last rib is at relDepthEnd. The spacing is constant.
The spacing of the ribs defines the distance between two ribs, measured along the pylons x-axis. First rib is placed at relDepthStart.
RibCrossingBehaviour can either be "cross" or "end". If it is end then ribs will end it they intersect another rib. It it is cross ribs are placed uncut.
Within the ribsPositioning type the position and the orientation of the ribs of the rib set are defined.
The forward and the rear beginning of the rib set is defined using relDepthStart and relDepthEnd. The orientation of the ribs is defined in ribRotaton. The number of ribs of the current rib set is either defined by ribNumber or by spacing.