SPL format

Quoted with Steve Lamont's permission (-: I'm pretty sure):

 The output from mcube looks like

           xmin xmax ymin ymax zmin zmax
           x1 y1 z1
           x2 y2 z2
           x3 y3 z3
           x4 y4 z4
           -
           ...
           x1 y1 z1
           x2 y2 z2
           x3 y3 z3
           -

 where the [xyz]min and [xyz]max are copied from the input (and ignored by
 the program unless the bounding box option is chosen -- see below for usage)
 The xn, yn, zn values are vertex coordinates.  In the case of quadrilaterals
 or higher order polygons, the vertices are *not* necessarily coplanar and must
 be post processed by a triangulator filter if planar polygons are required.
 Each polygon is terminated by a single '-' (minus sign) followed by a linefeed

This "mcube" output format will be called "spl". Files written in this format will have an ".spl" suffix. They are also generated by our own surface tiler.