comirva.visu.epsgraphics.objects
Class EpsTransform

java.lang.Object
  comirva.visu.epsgraphics.objects.EpsTransform

All Implemented Interfaces:

EpsObject

public class EpsTransform
extends Object
implements EpsObject

this class represents an eps transformation. It is used to represent affine transformations

Field Summary

protected AffineTransform	at user defined transformations
protected static String[]	code postscript code definition
protected boolean	rad boolean defining whether given theta is in degree or radiant, default: rad
protected double	theta theta parameter for angles (in degree)
protected int	type transformation types.
static int	TYPE_ROTATE rotation
static int	TYPE_ROTATE2 "extended rotation" consisting of translation, rotation, and reverse translation
static int	TYPE_SCALE scaling
static int	TYPE_SHEAR performs shearing
static int	TYPE_TRANSFORM user defined transformation
static int	TYPE_TRANSLATE translation
protected double	x x parameter for points/vectors
protected double	y y parameter for points/vectors

Constructor Summary

EpsTransform(AffineTransform at)
Constructs an Eps Transformation object which is equivalent by the given AffineTransform

EpsTransform(double theta)
Constructs an Eps Transformation object which performs a rotation by a given angle theta in degree.

EpsTransform(double theta, double x, double y)
Constructs an Eps Transfomration object which performs an "extended rotation": Calling this method is equivalent to translate(x,y); rotate(theta); translate(-x,-y);

EpsTransform(int type, double x, double y)
Constructs an Eps Transformation object which performs a transformation given by the parameters.

Method Summary

boolean	equals(Object obj)
boolean	isRadiant() ability to check if angles are treated as radiant or degree values
void	setToDegree() specify theta angles to be degree values (range 0-360) the given values are not changed.
void	setToRadiant() specify theta angles to be radiant values.
String	toEps() returns a String that represents the object in postscript code

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_TRANSFORM

public static final int TYPE_TRANSFORM

user defined transformation

See Also:

Constant Field Values

TYPE_SCALE

public static final int TYPE_SCALE

scaling

See Also:

Constant Field Values

TYPE_TRANSLATE

public static final int TYPE_TRANSLATE

translation

See Also:

Constant Field Values

TYPE_ROTATE

public static final int TYPE_ROTATE

rotation

See Also:

Constant Field Values

TYPE_ROTATE2

public static final int TYPE_ROTATE2

"extended rotation" consisting of translation, rotation, and reverse translation

See Also:

Constant Field Values

TYPE_SHEAR

public static final int TYPE_SHEAR

performs shearing

See Also:

Constant Field Values

code

protected static final String[] code

postscript code definition

type

protected int type

transformation types. Must be one of TYPE_SCALE, TYPE_ROTATE, TYPE_ROTATE2 TYPE_SHEAR and TYPE_TRANSFORM

x

protected double x

x parameter for points/vectors

y

protected double y

y parameter for points/vectors

theta

protected double theta

theta parameter for angles (in degree)

at

protected AffineTransform at

user defined transformations

rad

protected boolean rad

boolean defining whether given theta is in degree or radiant, default: rad

Constructor Detail

EpsTransform

public EpsTransform(AffineTransform at)

Constructs an Eps Transformation object which is equivalent by the given AffineTransform

Parameters:

at - The transformation which should be represented by this object

EpsTransform

public EpsTransform(int type,
                    double x,
                    double y)

Constructs an Eps Transformation object which performs a transformation given by the parameters. The meaning of the x and y parameters depends on the given type but it is equivalent when using an AffineTransform.

Parameters:

type - The type of the transformation. May be TYPE_TRANSLATE, TYPE_SCALE or TYPE_SHEAR.

x - The x parameter for the transformation

y - The y coordinate for the transformation

EpsTransform

public EpsTransform(double theta)

Constructs an Eps Transformation object which performs a rotation by a given angle theta in degree.

Parameters:

theta - the rotation angle in degree (0-360).

EpsTransform

public EpsTransform(double theta,
                    double x,
                    double y)

Constructs an Eps Transfomration object which performs an "extended rotation": Calling this method is equivalent to translate(x,y); rotate(theta); translate(-x,-y);

Parameters:

theta - The rotation angle in degree

x - The x coordinate for translation

y - The y coordinate for translation

Method Detail

setToRadiant

public void setToRadiant()

specify theta angles to be radiant values. the given theta values are regarded to be radiant values and therefore multiplied by 360/PI.

setToDegree

public void setToDegree()

specify theta angles to be degree values (range 0-360) the given values are not changed.

isRadiant

public boolean isRadiant()

ability to check if angles are treated as radiant or degree values

Returns:

rad (true if radiant, false if degree)

toEps

public String toEps()

Description copied from interface: EpsObject

returns a String that represents the object in postscript code

Specified by:

toEps in interface EpsObject

equals

public boolean equals(Object obj)

Overrides:

equals in class Object