Already ported to JS
http://econym.org.uk/gmap/EPoly.htm

On Thu, Sep 18, 2008 at 2:08 PM, TinyGrasshopper <[EMAIL PROTECTED]> wrote:
>
> There are a bunch of algorithms for testing if a point lies within a
> polygon. You could test each polygon with one of those.
>
> Here are some with code examples (in c but the javascript would be
> virtually identical) 
> http://local.wasp.uwa.edu.au/~pbourke/geometry/insidepoly/
>
> Cheers,
> Chris
>
> On Sep 18, 10:56 pm, "Josh Rosenthal" <[EMAIL PROTECTED]> wrote:
>> Hmm.  I like.  However, are we dependent on relying on user interaction in
>> the form of clicks?  Simulating this for say... a marker's dragend event,
>> doesn't provide the overlay parameter.  Even were we to trigger a click
>> programmatically, it seems that we'd need to know the overlay in advance.
>>  Can we get our "coordinate not in clickable polygon" info from other
>> coordinate based events?
>>
>> On Thu, Sep 18, 2008 at 2:41 AM, Mike Williams <[EMAIL PROTECTED]>wrote:
>>
>>
>>
>> > You can easily recognise clicks that occur on the base map rather than
>> > on a clickable polygon by noticing that the second parameter of the map
>> > "click" event is null.
>>
>> > That won't help if the click finds a clickable marker or info window
>> > above the polygon layer.
>>
>> > --
>> >http://econym.org.uk/gmap
>> > The Blackpool Community Church Javascript Team
> >
>



-- 
Barry

- www.nearby.org.uk - www.geograph.org.uk -

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