net.dzzd.utils
Class MathX

java.lang.Object
  net.dzzd.utils.MathX

public class MathX

extends java.lang.Object

MathX class.
Base class used by 3DzzD Web 3D Engine to include faster and/or smarter maths functions

Some results comparaison between Math.cos and MathX.cos function, MathX.cos seems to be 0.5 to 20 times faster than Math.cos function and give more accurate results especially for PI/2

-PI
MathX.cos(-Math.PI) =-1.0
Math.cos(-Math.PI) =-1.0

PI
MathX.cos(Math.PI) =-1.0
Math.cos(Math.PI) =-1.0

Root(2)/2=0.7071067811865476
PI/4
MathX.cos(Math.PI*0.25) =0.7071067811865476
Math.cos(Math.PI*0.25) =0.7071067811865476

PI/2
MathX.cos(Math.PI*0.25) =0.0
Math.cos(Math.PI*0.25) =6.123233995736766E-17

-PI/4
MathX.cos(-Math.PI*0.25)=0.7071067811865476
Math.cos(-Math.PI*0.25) =0.7071067811865476

-PI/2
MathX.cos(-Math.PI*0.5) =0.0
Math.cos(-Math.PI*0.5) =6.123233995736766E-17

Since:

1.0

Version:

1.0, 01/03/07

Author:

Bruno Augier (DzzD)

See Also:

IRender3D, IMesh3D, DzzD, http://dzzd.net/

Field Summary

static double

PI

Constructor Summary

MathX()

Method Summary

static double	cos(double x) Compute and return cosinus of its parameter using taylor serie
static double	sin(double x) Compute and return sinus of its parameter using taylor serie

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PI

public static double PI

Constructor Detail

MathX

public MathX()

Method Detail

sin

public static final double sin(double x)

Compute and return sinus of its parameter using taylor serie

Parameters:

x - angle in radian to

Returns:

sinus value for the given parameter

cos

public static final double cos(double x)

Compute and return cosinus of its parameter using taylor serie

Parameters:

x - angle in radian to

Returns:

cosinus value for the given parameter