Awesome

Point-in-Polygon extension for GeoRuby

Description

• Ruby C-extension for finding if a point lies inside a polygon
• Original ray casting algorithm taken from here
• An extension for GeoRuby is provided
• Compatible with Ruby 1.9.2 only, I think... (not tested on 1.8.x)

Usage

To compile extension do:

$ ruby extconf.rb
$ make