User Guide

Math.pow() 439
Math.pow()
Availability
Flash Player 5. In Flash Player 4, the methods and properties of the Math class are emulated using
approximations and might not be as accurate as the non-emulated math functions that Flash
Player 5 supports.
Usage
Math.pow(x:Number , y:Number) : Number
Parameters
x
A number to be raised to a power.
y A number specifying a power the parameter x is raised to.
Returns
A number.
Description
Method; computes and returns x to the power of y.
Example
The following example uses Math.pow and Math.sqrt to calculate the length of a line.
this.createEmptyMovieClip("canvas_mc", this.getNextHighestDepth());
var mouseListener:Object = new Object();
mouseListener.onMouseDown = function() {
this.origX = _xmouse;
this.origY = _ymouse;
};
mouseListener.onMouseUp = function() {
this.newX = _xmouse;
this.newY = _ymouse;
var minY = Math.min(this.origY, this.newY);
var nextDepth:Number = canvas_mc.getNextHighestDepth();
var line_mc:MovieClip =
canvas_mc.createEmptyMovieClip("line"+nextDepth+"_mc", nextDepth);
line_mc.moveTo(this.origX, this.origY);
line_mc.lineStyle(2, 0x000000, 100);
line_mc.lineTo(this.newX, this.newY);
var hypLen:Number = Math.sqrt(Math.pow(line_mc._width,
2)+Math.pow(line_mc._height, 2));
line_mc.createTextField("length"+nextDepth+"_txt",
canvas_mc.getNextHighestDepth(), this.origX, this.origY-22, 100, 22);
line_mc['length'+nextDepth+'_txt'].text = Math.round(hypLen) +" pixels";
};
Mouse.addListener(mouseListener);