org.gvsig.dwg.lib.util

Class Matrix4D

java.lang.Object

org.gvsig.dwg.lib.util.Matrix4D

public final class Matrix4D
extends Object

4x4dim double matrix used for perspective transformations. The class is now declared final to allow a more aggresive optimization.

Field Summary

Fields

Modifier and Type	Field and Description
double	ww
double	wx
double	wy
double	wz
double	xw
double	xx
double	xy
double	xz
double	yw
double	yx
double	yy
double	yz
double	zw
double	zx
double	zy
double	zz

Constructor Summary

Constructors

Constructor and Description
Matrix4D() Create identity matrix.
Matrix4D(double mxx, double mxy, double mxz, double mxw, double myx, double myy, double myz, double myw, double mzx, double mzy, double mzz, double mzw, double mwx, double mwy, double mwz, double mww)
Matrix4D(Matrix4D m) Copy constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	identity() Reset to identity
void	moveBy(double x, double y, double z) Move the stuff.
void	moveBy(Vector3D v) Translate the origin
Matrix4D	mult(Matrix4D m) Matrix multiplication.
Point3D	mult(Point3D p) Matrix multiplication of point.
Vector3D	mult(Vector3D v) Matrix multiplication of vector.
void	multBy(Matrix4D m) Matrix multiplication.
void	multLeftBy(Matrix4D m) Matrix multiplication from left.
void	scale(double f) Scale.
void	scale(double fx, double fy, double fz) Scale different in x,y,z.
String	toString() Output
void	transform(Point3D p) Transformation of 1 point.
void	transform(Point3D[] v, int[] tx, int[] ty, int[] tz, int npoints) Transform some points.
void	transform(Vector3D v) Transformation of 1 vector.
void	transformXY(Point3D p) Transformacion de un punto considerando solo el plano horizontal
void	translate(double x, double y, double z) Translate the origin.
void	translate(Vector3D v) Translate the origin
void	translateLeft(double x, double y, double z) Translate.
void	translateLeft(Vector3D v) Translate the origin
void	transponize() Transponize.
void	xrot(double theta) Rotate theta degrees about the x axis.
void	yrot(double theta) Rotate theta degrees about the y axis.
void	zrot(double theta) Rotate theta degrees about the z axis.

Methods inherited from class java.lang.Object

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

Field Detail

xx

public double xx

xy

public double xy

xz

public double xz

xw

public double xw

yx

public double yx

yy

public double yy

yz

public double yz

yw

public double yw

zx

public double zx

zy

public double zy

zz

public double zz

zw

public double zw

wx

public double wx

wy

public double wy

wz

public double wz

ww

public double ww

Constructor Detail

Matrix4D

public Matrix4D()

Create identity matrix.

Matrix4D

public Matrix4D(Matrix4D m)

Copy constructor.

Parameters:

m - matrix to copy

Matrix4D

public Matrix4D(double mxx,
        double mxy,
        double mxz,
        double mxw,
        double myx,
        double myy,
        double myz,
        double myw,
        double mzx,
        double mzy,
        double mzz,
        double mzw,
        double mwx,
        double mwy,
        double mwz,
        double mww)

Parameters:

mxx - 1st elem in 1st row

mxy - 2nd elem in 1st row

mxz - 3rd elem in 1st row

mxw - 4th elem in 1st row

myx - 1st elem in 2nd row

myy - 2nd elem in 2nd row

myz - 3rd elem in 2nd row

myw - 4th elem in 2nd row

mzx - 1st elem in 3rd row

mzy - 2nd elem in 3rd row

mzz - 3rd elem in 3rd row

mzw - 4th elem in 3rd row

mwx - 1st elem in 4th row

mwy - 2nd elem in 4th row

mwz - 3rd elem in 4th row

mww - 4th elem in 4th row

Method Detail

identity

public void identity()

Reset to identity

transponize

public void transponize()

Transponize.

mult

public Vector3D mult(Vector3D v)

Matrix multiplication of vector.

Parameters:

v - vector to transform

Returns:

transformed vector

transform

public void transform(Vector3D v)

Transformation of 1 vector.

Parameters:

v - vector to transform

mult

public Point3D mult(Point3D p)

Matrix multiplication of point.

Parameters:

p - point to transform

Returns:

transformed point

transform

public void transform(Point3D p)

Transformation of 1 point.

Parameters:

p - point to transform

transformXY

public void transformXY(Point3D p)

Transformacion de un punto considerando solo el plano horizontal

mult

public Matrix4D mult(Matrix4D m)

Matrix multiplication.

Parameters:

m - matrix to multiply with

Returns:

this * m

multBy

public void multBy(Matrix4D m)

Matrix multiplication.

Parameters:

m - matrix to multply with

multLeftBy

public void multLeftBy(Matrix4D m)

Matrix multiplication from left.

Parameters:

m - matrix to multiply with.

translate

public void translate(double x,
             double y,
             double z)

Translate the origin.

Parameters:

x - translation in x

y - translation in y

z - translation in z

translate

public void translate(Vector3D v)

Translate the origin

Parameters:

v - translation vector

translateLeft

public void translateLeft(double x,
                 double y,
                 double z)

Translate.

Parameters:

x - translation in x

y - translation in y

z - translation in z

translateLeft

public void translateLeft(Vector3D v)

Translate the origin

Parameters:

v - tranbslation vector

moveBy

public void moveBy(double x,
          double y,
          double z)

Move the stuff.

Parameters:

x - translation in x

y - translation in y

z - translation in z

moveBy

public void moveBy(Vector3D v)

Translate the origin

Parameters:

v - translation vector

yrot

public void yrot(double theta)

Rotate theta degrees about the y axis.

Parameters:

theta - rotation angle in rad

xrot

public void xrot(double theta)

Rotate theta degrees about the x axis.

Parameters:

theta - rotation angle in rad

zrot

public void zrot(double theta)

Rotate theta degrees about the z axis.

Parameters:

theta - rotation angle in rad

scale

public void scale(double f)

Scale.

Parameters:

f - factor to scale with.

scale

public void scale(double fx,
         double fy,
         double fz)

Scale different in x,y,z.

Parameters:

fx - scaling factor in x

fy - scaling factor in y

fz - scaling factor in z

transform

public void transform(Point3D[] v,
             int[] tx,
             int[] ty,
             int[] tz,
             int npoints)

Transform some points.

Parameters:

v - points to transform

tx - transformed points x coord

ty - transformed points y coord

tz - transformed points z coord

npoints - nr of points to transform

toString

public String toString()

Output

Overrides:

toString in class Object

Returns:

String representing this.