distance2 ( p1,  p2 )

triangle_normal ( t,  varray )

nonconvex_polygon_triangulation (
        curve,
        varray,
        reverse,
        )

curve_length ( curve )

Number of points in closed or open curve.

triangle_strip (
        curve1,
        curve2,
        varray,
        )

all_open_or_closed ( clist )

polygon_triangulation (
        curve,
        varray,
        reverse=None,
        )

order_points_for_stitching (
        curves,
        varray,
        axis,
        )

Adjust ordering of points in curves for stitching. For closed loops choose first point as one with maximum x value and choose order of points for counter-clockwise traversal. For open curves choose vectors between end points of successive curves to have positive inner product.

order_chains ( curves,  varray )

Take a list of chains (given by indices) and put the chains in order for stitching a surface. Use average normal to determine axis.

Might issue warning if two chain are within 10*-4 (normal extent) along normal to catch common case of multiple chains in a single plane.

stitch_curves (
        curves,
        varray,
        caps,
        )

Joins a set of one-dimensional paths to make a surface. The paths can be closed loops (last point same as first point) or have distinct end points. Each path is a sequence of xyz point positions.

center_and_normal ( curve,  varray )