SYNOPSIS:
    MARKCC_HULL2D_ANG axis bordercol remarkfrom to tol sp p1 p2 p3

DESCRIPTION:
    Construct a convex hull around a series of 2D outlines.
    This is done be searching for planes perpendicular to the given
    axis that contain voxels of color "bordercol". Whenever such a
    plane is found, all bordercol voxels in that plane are
    connected to the corresponding voxels in the next plane in
    an angular fashion(see below).
    The center for determining the angle is usually estimated by
    calculating the center of gravity.
    However it can be given by colorizing additional voxels in the
    plane in color sp (star point).
    Angle is usually identified globally, but you can give up to
    3 points on the border by colorizing them as p1, p2, p3 that will
    influence how voxels are matched.
    If only p1 is given, those points will be matched up by turning
    the angular systems. If points for p1 and p2 are given, the
    systems are distorted in a way that make both points match.
    Using a third point (p3) will allow to change the direction of
    rotation as well.
    Corresponding points (those that are within tol degrees) will
    be connected by lines which recolor the voxels on the lines
    from remarkfrom to to.
SEE ALSO:
    MARKCC_HULL2D
