MACROMEDIA FLASH 8-ACTIONSCRIPT 2.0 LANGUAGE, Справочник

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1016 ActionScript classes
Example
The first example creates a Point object
point_1
with the default constructor.
import flash.geom.Point;
var point_1:Point = new Point();
trace(point_1.x); // 0
trace(point_1.y); // 0
The second example creates a Point object
point_2
with the coordinates
x
= 1 and
y
= 2.
import flash.geom.Point;
var point_2:Point = new Point(1, 2);
trace(point_2.x); // 1
trace(point_2.y); // 2
polar (Point.polar method)
public static polar(len:Number, angle:Number) : Point
Converts a pair of polar coordinates to a cartesian point coordinate.
Availability: ActionScript 1.0; Flash Player 8
Parameters
len :Number
- The length coordinate of the polar pair.
angle :Number
- The angle, in radians, of the polar pair.
Returns
flash.geom.Point
- The cartesian point.
Example
The following example creates a Point object
cartesianPoint
from the value of
angleInRadians
and a line length of 5. The
angleInRadians
value equal to Math.atan(3/4)
is used because of the characteristics of right triangles with sides that have ratios of 3:4:5.
import flash.geom.Point;
var len:Number = 5;
var angleInRadians:Number = Math.atan(3/4);
var cartesianPoint:Point = Point.polar(len, angleInRadians);
trace(cartesianPoint.toString()); // (x=4, y=3)