Yup - .polar is working GREAT (and yes, using radians)
now lets say I have a position somewhere and I want to see where an angle
from it intersects a rectangle (assuming the point is within the
rectangle)... is there a similar method to get that x, y?
On Tue, Mar 17, 2009 at 11:36 AM, Piers Cowburn <m...@pierscowburn.com> wrote:
> Lots of cool stuff in the Rectangle class too, in case you didn't know :)
>
> Piers
>
>
>
> On 17 Mar 2009, at 15:00, Eric E. Dolecki wrote:
>
> Thanks man, you just changed my world.
>>
>> On Tue, Mar 17, 2009 at 10:26 AM, Merrill, Jason <
>> jason.merr...@bankofamerica.com> wrote:
>>
>> I have the angle (say 0 degrees).
>>>>> The length would then be pixels from the
>>>>> center (ie. radius)?
>>>>>
>>>>
>>> Yes, radius is pixel distance from starting point (in your case, the
>>> center
>>> point of the circle). Then you just need to convert angle to radians and
>>> you're good to go.
>>>
>>> var cartesianPoint:Point = Point.polar(len, angleInRadians);
>>>
>>> Here are some handy methods for you from one of my extended math classes:
>>>
>>> public static function polarToCartesian(distance:Number,
>>> degrees:Number):Point
>>> {
>>> var radians:Number = (degrees * Math.PI) / 180;
>>> return Point.polar(distance, radians);
>>> }
>>>
>>> public static function degreesToRadians(degrees:Number):Number
>>> {
>>> return (degrees * Math.PI)/180;
>>> }
>>>
>>> public static function radiansToDegrees(radians:Number):Number
>>> {
>>> return (radians*180)/Math.PI;
>>> }
>>>
>>> public static function cartesianAngle(fromPoint:Point,
>>> toPoint:Point):Number
>>> {
>>> var radians:Number = Math.atan2(toPoint.y-fromPoint.y,
>>> toPoint.x-fromPoint.x);
>>> var backAzimuthDegrees:Number =
>>> MathTranslation.radiansToDegrees(radians);
>>> return MathTranslation.getBackAzimuth(backAzimuthDegrees);
>>> }
>>>
>>> public static function getBackAzimuth(angle:Number):Number
>>> {
>>> var backAzimuth:Number;
>>> if(angle < 180)
>>> {
>>> var tempNeg:Number = angle-180;
>>> backAzimuth = tempNeg + 360;
>>> }
>>> else
>>> {
>>> backAzimuth = angle-180;
>>> }
>>> return backAzimuth;
>>> }
>>>
>>> Also, see this article:
>>>
>>>
>>>
>>> http://livedocs.adobe.com/flash/9.0/main/wwhelp/wwhimpl/common/html/wwhelp.htm?context=LiveDocs_Parts&file=00002060.html
>>>
>>>
>>> Jason Merrill
>>>
>>> Bank of America | Learning Performance Solutions Instructional
>>> Technology & Media
>>>
>>> Monthly meetings on the Adobe Flash platform for rich media experiences -
>>> join the Bank of America Flash Platform Community
>>>
>>>
>>> _______________________________________________
>>> Flashcoders mailing list
>>> Flashcoders@chattyfig.figleaf.com
>>> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
>>>
>>>
>>
>>
>> --
>> http://ericd.net
>> Interactive design and development
>> _______________________________________________
>> Flashcoders mailing list
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>>
>
> Piers
> m...@pierscowburn.com
>
>
>
>
> _______________________________________________
> Flashcoders mailing list
> Flashcoders@chattyfig.figleaf.com
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>
--
http://ericd.net
Interactive design and development
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