3d curve
distance between corrdinates in output trajectory
optional extension of original path (extrapolation)
a minimum size of the output. If less, points will be extrapolated in both ends
if there is not enough deviation in the input path to determine an extrapolation angle, this angle will be used (default: 0 radians)
2d curve along the XZ plane
Generate a equaly spaced trajectory along XZ plane from a linear 3d curve where the distance between coordinates corresponds to stepSize.