[boost] Adapting Polygon to work with point attributes

Subject: [boost] Adapting Polygon to work with point attributes
From: Paul Miller (paul_at_[hidden])
Date: 2012-02-29 13:22:04

Boost::Polygon looks like exactly what I need to do some boolean 
operations on polygons but my polygons have additional attributes per 
point that I want to carry through the operation. But I can't figure out 
how to get polygon to create sensible values for the attributes other 
than X,Y, and I can't find an example that covers this scenario. It 
seems from the documentation that this is possible however. Can someone 
point me to an example, to say, adapt a polygon with this Point type?

struct Point {
     int x, y;
     float r, g, b, a;
};

Ideally it would average new r, g, b, a values together to make new 
points and polygon join points, but it could just copy one of the 
existing Points' attributes instead. I'm not picky.

Cheers!