MACROMEDIA FLASH 8-ACTIONSCRIPT 2.0 LANGUAGE - Subtract (Point.subtract Method); Tostring (Point.tostring Method)

Point (flash.geom.Point) 1017
When computers work with transcendental numbers such as pi, some round-off error occurs
because floating-point arithmetic has only finite precision. When you use
Math.PI, consider
using the
Math.round() function, as shown in the following example.
import flash.geom.Point;
var len:Number = 10;
var angleInRadians:Number = Math.PI;
var cartesianPoint:Point = Point.polar(len, angleInRadians);
trace(cartesianPoint.toString()); // should be (x=-10, y=0), but is (x=-10,
y=1.22460635382238e-15)
trace(Math.round(cartesianPoint.y)); // 0
See also
length (Point.length property), round (Math.round method)
subtract (Point.subtract method)
public subtract(v:Point) : Point
Subtracts the coordinates of another point from the coordinates of this point to create a new
point.
Availability: ActionScript 1.0; Flash Player 8
Parameters
v:flash.geom.Point - The point to be subtracted.
Returns
flash.geom.Point - The new point.
Example
The following example creates
point_3 by subtracting point_2 from point_1.
import flash.geom.Point;
var point_1:Point = new Point(4, 8);
var point_2:Point = new Point(1, 2);
var resultPoint:Point = point_1.subtract(point_2);
trace(resultPoint.toString()); // (x=3, y=6)
toString (Point.toString method)
public toString() : String
Returns a string that contains the values of the x and y coordinates. It has the form (x, y), so a
Point at 23,17 would report "(x=23, y=17)".
Availability: ActionScript 1.0; Flash Player 8