org.oscim.renderer

Class GLMatrix

java.lang.Object

org.oscim.renderer.GLMatrix

public class GLMatrix
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	M00
static int	M01
static int	M02
static int	M03
static int	M10
static int	M11
static int	M12
static int	M13
static int	M20
static int	M21
static int	M22
static int	M23
static int	M30
static int	M31
static int	M32
static int	M33
float[]	tmp
float[]	val

Constructor Summary

Constructors

Constructor and Description
GLMatrix()

Method Summary

Modifier and Type	Method and Description
void	addDepthOffset(int delta) add some offset (similar to glDepthOffset)
void	copy(GLMatrix m) Copy values from mat
static void	frustumM(float[] m, int offset, float left, float right, float bottom, float top, float near, float far) Define a projection matrix in terms of six clip planes
void	get(float[] m) Get the Matrix as float array
static boolean	invertM(float[] mInv, int mInvOffset, float[] m, int mOffset) Inverts a 4 x 4 matrix.
void	multiplyLhs(GLMatrix lhs) Use this matrix as rhs, multiply it on lhs and store result.
void	multiplyMM(GLMatrix lhs, GLMatrix rhs) Multiply rhs onto lhs and store result in Matrix.
void	multiplyRhs(GLMatrix rhs) Multiply rhs onto Matrix.
void	prj(float[] vec3) Project Vector with Matrix
void	prj2D(float[] src, int src_offset, float[] dst, int dst_offset, int length) Project Vectors with Matrix
void	prj2D(float[] vec, int offset, int cnt)
void	prj3D(float[] vec, int offset, int cnt)
void	set(float[] values) Sets the matrix to the given matrix as a float array.
void	setAsUniform(int location) Set Matrix with glUniformMatrix
void	setIdentity() Set identity matrix
void	setRotation(float a, float x, float y, float z) Set rotation
void	setScale(float x, float y, float z) Set scale factor
void	setTranslation(float x, float y, float z) Set translation
void	setTransScale(float tx, float ty, float scale) Set translation and x,y scale
void	setValue(int pos, float value) Set single value
void	transposeM(GLMatrix mat) Transpose mat and store result in Matrix

Methods inherited from class java.lang.Object

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

Field Detail

M00

public static final int M00

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Constant Field Values

M01

public static final int M01

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Constant Field Values

M02

public static final int M02

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Constant Field Values

M03

public static final int M03

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Constant Field Values

M10

public static final int M10

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Constant Field Values

M11

public static final int M11

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Constant Field Values

M12

public static final int M12

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Constant Field Values

M13

public static final int M13

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Constant Field Values

M20

public static final int M20

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M21

public static final int M21

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M22

public static final int M22

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Constant Field Values

M23

public static final int M23

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Constant Field Values

M30

public static final int M30

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Constant Field Values

M31

public static final int M31

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Constant Field Values

M32

public static final int M32

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Constant Field Values

M33

public static final int M33

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Constant Field Values

tmp

public final float[] tmp

val

public final float[] val

Constructor Detail

GLMatrix

public GLMatrix()

Method Detail

set

public void set(float[] values)

Sets the matrix to the given matrix as a float array. The float array must have at least 16 elements; the first 16 will be copied.

Parameters:

values - The matrix, in float form, that is to be copied. Remember that this matrix is in column major order.

get

public void get(float[] m)

Get the Matrix as float array

Parameters:

m - float array to store Matrix

copy

public void copy(GLMatrix m)

Copy values from mat

Parameters:

mat - Matrix to copy

prj

public void prj(float[] vec3)

Project Vector with Matrix

Parameters:

vec3 - Vector to project

prj3D

public void prj3D(float[] vec,
                  int offset,
                  int cnt)

prj2D

public void prj2D(float[] vec,
                  int offset,
                  int cnt)

prj2D

public void prj2D(float[] src,
                  int src_offset,
                  float[] dst,
                  int dst_offset,
                  int length)

Project Vectors with Matrix

Parameters:

vec2 - Vector to project

multiplyRhs

public void multiplyRhs(GLMatrix rhs)

Multiply rhs onto Matrix.

Parameters:

rhs - right hand side

multiplyLhs

public void multiplyLhs(GLMatrix lhs)

Use this matrix as rhs, multiply it on lhs and store result.

Parameters:

lhs - right hand side

multiplyMM

public void multiplyMM(GLMatrix lhs,
                       GLMatrix rhs)

Multiply rhs onto lhs and store result in Matrix.

This matrix MUST be different from lhs and rhs!

As you know, when combining matrices for vector projection this has the same effect first as applying rhs then lhs.

Parameters:

lhs - left hand side

rhs - right hand side

transposeM

public void transposeM(GLMatrix mat)

Transpose mat and store result in Matrix

Parameters:

mat - to transpose

setRotation

public void setRotation(float a,
                        float x,
                        float y,
                        float z)

Set rotation

Parameters:

a - angle in degree

x - around x-axis

y - around y-axis

z - around z-axis

setTranslation

public void setTranslation(float x,
                           float y,
                           float z)

Set translation

Parameters:

x - along x-axis

y - along y-axis

z - along z-axis

setScale

public void setScale(float x,
                     float y,
                     float z)

Set scale factor

Parameters:

x - axis

y - axis

z - axis

setTransScale

public void setTransScale(float tx,
                          float ty,
                          float scale)

Set translation and x,y scale

Parameters:

tx - translate x

ty - translate y

scale - factor x,y

setAsUniform

public void setAsUniform(int location)

Set Matrix with glUniformMatrix

Parameters:

location - GL location id

setValue

public void setValue(int pos,
                     float value)

Set single value

Parameters:

pos - at position

value - value to set

addDepthOffset

public void addDepthOffset(int delta)

add some offset (similar to glDepthOffset)

Parameters:

delta - offset

setIdentity

public void setIdentity()

Set identity matrix

frustumM

public static void frustumM(float[] m,
                            int offset,
                            float left,
                            float right,
                            float bottom,
                            float top,
                            float near,
                            float far)

Define a projection matrix in terms of six clip planes

Parameters:

m - the float array that holds the perspective matrix

offset - the offset into float array m where the perspective matrix data is written

invertM

public static boolean invertM(float[] mInv,
                              int mInvOffset,
                              float[] m,
                              int mOffset)

Inverts a 4 x 4 matrix.

Parameters:

mInv - the array that holds the output inverted matrix

mInvOffset - an offset into mInv where the inverted matrix is stored.

m - the input array

mOffset - an offset into m where the matrix is stored.

Returns:

true if the matrix could be inverted, false if it could not.