>> 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
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