MathTables Class

Class org.rapo.games.MathTables

Inheritance > MathTables

Maintains sine and cosine tables for fast lookup of pre-calculated values The properties and methods are "static" so they can be used through a reference to the class (e.g. MathTables.sine[45]) This class should not be instanced.

Property Summary
static Number	angleDivisions The number of angle divisions used to rotate game objecst
static Array	cosine A pre-calcuated Array of cosine values for each whole degree
static Number	PI The value of PI
static Array	sine A pre-calcuated Array of sine values for each whole degree
static Boolean	tablesInitialized Indicates whether or not the class has been initialized.

Method Summary
static Boolean	initTables() Precalculates the sine and cosine Arrays.
static Void	setVelocity(angle_index:Number, speed:Number, velocity:Object) Given an angle index and a speed, sets the velocity coordinates of the given velocity Object.
static	traceTables() Prints the contents of the sine and cosine Arrays to the Output window.

Property Detail

angleDivisions

static var angleDivisions:Number;

The number of angle divisions used to rotate game objecst

cosine

static var cosine:Array;

A pre-calcuated Array of cosine values for each whole degree

static var PI:Number;

The value of PI

sine

static var sine:Array;

A pre-calcuated Array of sine values for each whole degree

tablesInitialized

static var tablesInitialized:Boolean;

Indicates whether or not the class has been initialized. Calling initTables() in the declaration ensures that it will be.

Method Detail

initTables

public static function initTables():Boolean

Precalculates the sine and cosine Arrays.

Parameters:

setVelocity

public static function setVelocity(angle_index:Number, speed:Number, velocity:Object):Void

Given an angle index and a speed, sets the velocity coordinates of the given velocity Object.

Parameters:

angle_index: The angle index of the desired angle
speed: The speed value (one-dimensional Scalar)
velocity: The Object which receives the vector coordinates (two-dimensional Vector)

traceTables

public static function traceTables()

Prints the contents of the sine and cosine Arrays to the Output window. Useful for debugging.

Parameters:

Documentation generated by BLDoc Community Edition from B-Line Express.