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java.lang.Objectorg.gnu.glib.Struct
org.freedesktop.cairo.Matrix
public class Matrix
TODO: error handling
Constructor Summary | |
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Matrix()
Creates a new matrix initialized with a noop transform. |
Method Summary | |
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double |
getX0()
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double |
getXX()
|
double |
getXY()
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double |
getY0()
|
double |
getYX()
|
double |
getYY()
|
void |
init(double xx,
double yx,
double xy,
double yy,
double x0,
double y0)
Sets the matrix to be the affine transformation given by xx, yx, xy, yy, x0, y0. |
void |
initIdentity()
Modifies the matrix to be an identity transformation. |
void |
initRotate(double radians)
Initialized the matrix to a transformation that rotates by |
void |
initScale(double sx,
double sy)
Initializes the matrix to a transformation that scales by sx and sy in the X and Y dimensions, respectively. |
void |
initTranslate(double tx,
double ty)
Initializes the matrix to a transformation that translates by tx and ty in the X and Y dimensions, respectively. |
void |
invert()
Inverts this matrix. |
static Matrix |
multiply(Matrix a,
Matrix b)
Multiplies 2 matrices and returns the result. |
void |
rotate(double radians)
Appends rotation transformation to this matrix. |
void |
scale(double sx,
double sy)
Appends non-uniform scaling to this matrix. |
void |
setX0(double x0)
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void |
setXX(double xx)
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void |
setXY(double xy)
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void |
setY0(double y0)
|
void |
setYX(double yx)
|
void |
setYY(double yy)
|
Point |
transformDistance(Point distance)
Transforms the given distance and returns transformed co-ordinates |
Point |
transformPoint(Point point)
Transforms the given point and returns transformed co-ordinates |
void |
translate(double tx,
double ty)
Appends a transaltion transformation to this matrix. |
Methods inherited from class org.gnu.glib.Struct |
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equals, getHandle, getNullHandle, hashCode |
Methods inherited from class java.lang.Object |
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getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public Matrix()
Method Detail |
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public void init(double xx, double yx, double xy, double yy, double x0, double y0)
x_new = xx * x + xy * y + x0;
y_new = yx * x + yy * y + y0;
public void initIdentity()
public void initTranslate(double tx, double ty)
tx
- amount to translate in the X direction.ty
- amount to translate in the Y direction.public void initScale(double sx, double sy)
sx
- scale factor in the X direction.sy
- scale factor in the Y direction.public void initRotate(double radians)
radians
- angle of rotation, in radians. The direction of rotation is
defined such that positive angles rotate in the direction from
the positive X axis toward the positive Y axis. With the
default axis orientation of cairo, positive angles rotate in a
clockwise direction.public void translate(double tx, double ty)
tx
- X axis translationty
- Y axis translationpublic void scale(double sx, double sy)
sx
- X axis scaling factorsy
- Y axis scaling factorpublic void rotate(double radians)
radians
- The rotation angle in radians.public void invert()
public static Matrix multiply(Matrix a, Matrix b)
a
- first matrixb
- second matrix
public Point transformDistance(Point distance)
public Point transformPoint(Point point)
public double getXX()
public void setXX(double xx)
public double getYX()
public void setYX(double yx)
public double getXY()
public void setXY(double xy)
public double getYY()
public void setYY(double yy)
public double getX0()
public void setX0(double x0)
public double getY0()
public void setY0(double y0)
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