TYPE: SOP
TITLE: Hole SOP

Consider making the letter "P" out of polygons.  One approach would be
to make a polygon of the exterior of the P, and another of the
interior.  This will, however, merely draw the hole of the P twice
rather than having it be empty.

The standard solution to this is to bridge the hole.  This turns the P
into a single polygon with a doubled up edge connecting the hole with
the exterior.  The doubled up edge is referred to as a bridge.

This operation allows you to convert between the two representations.  If
Un-bridge is on, it will remove the bridges in the input and generate
the multiple-polygon representation.  Otherwise, it looks for polygons
inside other polygons and constructs bridges so that the interior
polygons become holes.

The tolerance parameters determine how close to the plane of the
exterior polygon the interior ones must be to count as "inside".  The
Snap option will force the interior polys to lie in the plane of the
exterior.

Parameters:

    Group                  - Subset of geometry to hole.
    Un-bridge Holes        - Removes bridges to holes in the source.
    Distance Tolerance     - Maximum distance between interior geometry  /dist
			     and exterior geometry.
    Angle Tolerance        - Maximum rotation of interior geometry       /angle
			     relative to exterior geometry.
    Snap holes to outlines - Interior geometry is translated and rotated
			     to be flush with exterior geometry.

See also: Font
