1. Get the center of mass of the points ( average x, average y) 2. get the angle of each point in relation to the center of mass (basic trigonometry) 3. sort the array by the angle
Blair On 12/21/06, bmsterling <[EMAIL PROTECTED]> wrote:
Guys and gals, I am working on something that requires a person be able to click in an area and create a hot area. Here is a link to you can understand (http://ov.informationexperts.com/test.htm) The problem that i have is how do I sort a multidimensional array so that if a person clicks on four or more points that it makes a square or polygon and not an 8. To better illustrate what I am talking about, go to the link above and click in the grey box (in firefox with firebug you will get messeges logged there, on pc you will get a list form below it) and you will see points and its coordinates like [[75, 42], [257, 51], [71, 258], [323, 84], [329, 233]] (firebug). Those points makes don't make a correct box, so how should I sort it to make it a box. Below is the latest attempt to figure out how to sort it with no luck. [code] function mysortfn(a,b) { $.log("Comparing "+a+" and "+b); if (a[0]+a[1]<b[0]+b[1]) return -1; if (a[0]+a[1]>b[0]+b[1]) return 1; return 0; } [/code] any help is greatly appreciated. -- View this message in context: http://www.nabble.com/login-help-tf2862831.html#a8000052 Sent from the JQuery mailing list archive at Nabble.com. _______________________________________________ jQuery mailing list [email protected] http://jquery.com/discuss/
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