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java.lang.Object skyview.geometry.Transformer skyview.geometry.Scaler
public class Scaler
This class does 2-D scalings, rotations and linear transformations.
Constructor Summary | |
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Scaler(double x0,
double y0,
double a00,
double a01,
double a10,
double a11)
Create a scaler where y0 = x0 + a00*x0 + a01*x1, y1 = x0+a10*x0+a11*x1. |
Method Summary | |
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Scaler |
add(Scaler trans)
Add a second affine transformation to this one and return the composite transformation. |
void |
dump(java.io.PrintStream out)
Show the scaler. |
java.lang.String |
getDescription()
What is a descrition for this component? |
protected int |
getInputDimension()
What is the dimensionality of the input to a Scaler |
java.lang.String |
getName()
What is a name for this component? |
protected int |
getOutputDimension()
What is the dimensionality of the output of a Scaler |
double[] |
getParams()
|
void |
interchangeAxes()
Interchange the X and Y axes |
Scaler |
inverse()
Return the inverse transformation. |
boolean |
isInverse(Transformer trans)
Is this an inverse of the current scaler? |
double |
scale()
What is the scale of this transformation? This is defined as the ratio of the lengths between a unit transformation on input. |
void |
transform(double[] x,
double[] y)
Scale a single point where the user supplies the output. |
Methods inherited from class skyview.geometry.Transformer |
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transform, transform |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public Scaler(double x0, double y0, double a00, double a01, double a10, double a11)
x0
- The X offsety0
- The Y offseta00
- Coefficient of the transformation matrix.a01
- Coefficient of the transformation matrix.a10
- Coefficient of the transformation matrix.a11
- Coefficient of the transformation matrix.Method Detail |
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public double[] getParams()
protected int getOutputDimension()
getOutputDimension
in class Transformer
protected int getInputDimension()
getInputDimension
in class Transformer
public java.lang.String getName()
getName
in interface Component
public java.lang.String getDescription()
getDescription
in interface Component
public void transform(double[] x, double[] y)
transform
in class Transformer
x
- The input point (should be double[2])y
- The output point (should be double[2])public Scaler inverse() throws TransformationException
inverse
in class Transformer
TransformationException
- if the forward transformation matrix is singular.public Scaler add(Scaler trans)
trans
- A second transformation which is applied after the transformation
described in 'this'.
public boolean isInverse(Transformer trans)
isInverse
in class Transformer
public double scale()
public void interchangeAxes()
public void dump(java.io.PrintStream out)
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