```
public final class gl_util
extends Object
```
gl_util is the utility class of jGL 2.4.

Version:

0.3, 20 Nov 2006

Author:

Robin Bing-Yu Chen

Constructor Summary

Constructors
Constructor Description

gl_util()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static float[]`	`adjoint44(float[] a)`
`static float`	`BtoF(byte x)`
`static int`	`BtoI(byte x)`
`static byte`	`CLAMP(byte x, byte min, byte max)`
`static float`	`CLAMP(double x, double min, double max)`
`static float`	`CLAMP(float x, double min, double max)`
`static float`	`CLAMP(float x, float min, float max)`
`static int`	`CLAMP(int x, int min, int max)`
`static short`	`CLAMP(short x, short min, short max)`
`static float[]`	`cross33(float[] u, float[] v)`
`static float`	`det22(float a, float b, float c, float d)`
`static float`	`det33(float a1, float a2, float a3, float b1, float b2, float b3, float c1, float c2, float c3)`
`static float`	`det44(float a1, float a2, float a3, float a4, float b1, float b2, float b3, float b4, float c1, float c2, float c3, float c4, float d1, float d2, float d3, float d4)`
`static float[]`	`diff33(float[] u, float[] v)`
`static float`	`dot33(float[] a, float[] b)`
`static float`	`dot44(float[] a, float[] b)`
`static float`	`frac(float x)`
`static int`	`FtoI(float x)`
`static float`	`interpolate(int i, int n, float u1, float u2)`
`static float`	`interpolate(int i, int n, float u1, float u2, float du)`
`static float[]`	`inverseMatrix44(float[] a)`
`static int`	`ItoA(int x)`
`static int`	`ItoB(int x)`
`static float`	`ItoF(int x)`
`static int`	`ItoG(int x)`
`static int`	`ItoR(int x)`
`static int[]`	`ItoRGB(int i)`
`static int[]`	`ItoRGBA(int i)`
`static float[]`	`ItoRGBAf(int i)`
`static float[]`	`ItoRGBf(int i)`
`static void`	`loadMatrix44(float[] a, float[] b)`
`static int`	`logbase2(int n)`
`static float[]`	`mulMatrix31(float[] a, float[] b)`
`static float[]`	`mulMatrix41(float[] a, float[] b)`
`static float[]`	`mulMatrix44(float[] a, float[] b)`
`static float`	`normalize(float[] p)`
`static int`	`RGBAtoI(byte r, byte g, byte b, byte a)`
`static int`	`RGBAtoI(float r, float g, float b, float a)`
`static int`	`RGBAtoI(int r, int g, int b, int a)`
`static int`	`RGBtoI(byte r, byte g, byte b)`
`static int`	`RGBtoI(float r, float g, float b)`
`static int`	`RGBtoI(int r, int g, int b)`
`static void`	`showMatrix41(float[] m)`
`static void`	`showMatrix44(float[] m)`
`static int`	`StoI(short x)`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- gl_util
```
public gl_util()
```

Method Detail

showMatrix44

public static void showMatrix44(float[] m)

showMatrix41

public static void showMatrix41(float[] m)

mulMatrix44

public static float[] mulMatrix44(float[] a,
                                  float[] b)

mulMatrix41

public static float[] mulMatrix41(float[] a,
                                  float[] b)

mulMatrix31

public static float[] mulMatrix31(float[] a,
                                  float[] b)

loadMatrix44

public static void loadMatrix44(float[] a,
                                float[] b)

det22

public static float det22(float a,
                          float b,
                          float c,
                          float d)

det33

public static float det33(float a1,
                          float a2,
                          float a3,
                          float b1,
                          float b2,
                          float b3,
                          float c1,
                          float c2,
                          float c3)

det44

public static float det44(float a1,
                          float a2,
                          float a3,
                          float a4,
                          float b1,
                          float b2,
                          float b3,
                          float b4,
                          float c1,
                          float c2,
                          float c3,
                          float c4,
                          float d1,
                          float d2,
                          float d3,
                          float d4)

adjoint44

public static float[] adjoint44(float[] a)

inverseMatrix44

public static float[] inverseMatrix44(float[] a)

dot33

public static float dot33(float[] a,
                          float[] b)

dot44

public static float dot44(float[] a,
                          float[] b)

diff33

public static float[] diff33(float[] u,
                             float[] v)

cross33

public static float[] cross33(float[] u,
                              float[] v)

logbase2
```
public static int logbase2(int n)
```

frac
```
public static float frac(float x)
```

normalize

public static float normalize(float[] p)

interpolate

public static float interpolate(int i,
                                int n,
                                float u1,
                                float u2,
                                float du)

interpolate

public static float interpolate(int i,
                                int n,
                                float u1,
                                float u2)

CLAMP

public static byte CLAMP(byte x,
                         byte min,
                         byte max)

CLAMP

public static short CLAMP(short x,
                          short min,
                          short max)

CLAMP

public static int CLAMP(int x,
                        int min,
                        int max)

CLAMP

public static float CLAMP(float x,
                          float min,
                          float max)

CLAMP

public static float CLAMP(float x,
                          double min,
                          double max)

CLAMP

public static float CLAMP(double x,
                          double min,
                          double max)

BtoI
```
public static int BtoI(byte x)
```

StoI
```
public static int StoI(short x)
```

FtoI
```
public static int FtoI(float x)
```

BtoF
```
public static float BtoF(byte x)
```

ItoF
```
public static float ItoF(int x)
```

ItoR
```
public static int ItoR(int x)
```

ItoG
```
public static int ItoG(int x)
```

ItoB
```
public static int ItoB(int x)
```

ItoA
```
public static int ItoA(int x)
```

RGBAtoI

public static int RGBAtoI(byte r,
                          byte g,
                          byte b,
                          byte a)

RGBAtoI

public static int RGBAtoI(int r,
                          int g,
                          int b,
                          int a)

RGBAtoI

public static int RGBAtoI(float r,
                          float g,
                          float b,
                          float a)

RGBtoI

public static int RGBtoI(byte r,
                         byte g,
                         byte b)

RGBtoI

public static int RGBtoI(int r,
                         int g,
                         int b)

RGBtoI

public static int RGBtoI(float r,
                         float g,
                         float b)

ItoRGBA

public static int[] ItoRGBA(int i)

ItoRGBAf

public static float[] ItoRGBAf(int i)

ItoRGB
```
public static int[] ItoRGB(int i)
```

ItoRGBf

public static float[] ItoRGBf(int i)

Class gl_util

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

gl_util

Method Detail

showMatrix44

showMatrix41

mulMatrix44

mulMatrix41

mulMatrix31

loadMatrix44

det22

det33

det44

adjoint44

inverseMatrix44

dot33

dot44

diff33

cross33

logbase2

frac

normalize

interpolate

interpolate

CLAMP

CLAMP

CLAMP

CLAMP

CLAMP

CLAMP

BtoI

StoI

FtoI

BtoF

ItoF

ItoR

ItoG

ItoB

ItoA

RGBAtoI

RGBAtoI

RGBAtoI

RGBtoI

RGBtoI

RGBtoI

ItoRGBA

ItoRGBAf

ItoRGB

ItoRGBf