Hi Renier It is actually the other way around. If you cross an even number of vertices, the point is outside your polygon and if you cross an odd number the point is inside the polygon.
Or are we saying the same thing... :) Riaan -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Renier Rhode Sent: Monday, January 30, 2006 1:17 PM To: [email protected] Subject: [CTJUG Forum] Re: Creating a polygon *scratches noggin* Um if my memory serves me correctly from CS2 @ varsity... If you draw a line either horizontally or vertically and in the process of "drawing" this line you cross an even number of vertices you are still inside your polygon. If you cross an uneven number of vertices you are outside your polygon. Hope this helps... *evil grin* Cheers, Renier Riaan Koegelenberg wrote: > Hi > > I am trying to create a polygon in Java. The coordinates > of the polygon is lat/long (geographic coordinates) so it > can go up to quite a few decimal places. > > Have anyone ever done something like this? I need to > determine whether this polygon then contain a specific > point (coordinates also in lat/long). > > Any help will be appreciated. > > Riaan > ___________________________________________________________________ > For super low premiums, click here http://www.webmail.co.za/dd.pwm > > http://www.webmail.co.za the South African FREE email service -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.23/243 - Release Date: 1/27/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.23/243 - Release Date: 1/27/2006
