How to represent a polygon with hole(s)?

Question

It\'s usually popular to work with polygons with their vertices sorted CW or CCW in vectors(2*1 or 1*2 matrices). However, how to state polygons with holes in vectors?

Answer 1

What exactly do you mean under "a visibility graph" ?

Two "full" poligons, two states possible, either +1 or -1.

If you're representing a hole, you've got one with state +1 and one with state -1, which represents a hole, resulting in state 0.
If you've got overlapping polygons, you'll end up with resultant state >1. Then you can calculate the borders of a new polygon.
If you've got two polygons with holes that intersect, then first calculate the state of a new polygon which consists of outer borders of the two old ones, then deal with holes.

Anyways, ... I think you get the general principle.

Have no idea how to do it in matlab, I used it only marginally so far, and even that for very simple things.