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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.referencing.operation.transform 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.geotools.referencing.operation.transform.AbstractMathTransform
   org.geotools.referencing.operation.transform.LogarithmicTransform1D

LogarithmicTransform1D
public class LogarithmicTransform1D extends AbstractMathTransform implements MathTransform1D,Serializable(Code)
A one dimensional, logarithmic transform. Input values x are converted into output values y using the following equation:

y  =  + log (x)   =   + ln(x)/ln( )

This transform is the inverse of ExponentialTransform1D .
since:
   2.0
version:
   $Id: LogarithmicTransform1D.java 24384 2007-02-14 00:23:05Z desruisseaux $
author:
   Martin Desruisseaux
See Also:   ExponentialTransform1D
See Also:   LinearTransform1D

Inner Class :public static class Provider extends MathTransformProvider

Field Summary
final public  doublebase
     The base of the logarithm.
final  doublelnBase
     Natural logarithm of LogarithmicTransform1D.base .
final public  doubleoffset
     The offset to add to the logarithm.

Constructor Summary
 LogarithmicTransform1D(ExponentialTransform1D inverse)
     Constructs a new logarithmic transform which is the inverse of the supplied exponentional transform.
protected  LogarithmicTransform1D(double base, double offset)
     Constructs a new logarithmic transform.

Method Summary
 MathTransformconcatenate(MathTransform other, boolean applyOtherFirst)
     Concatenates in an optimized way a MathTransform other to this MathTransform .
public static  MathTransform1Dcreate(double base, double offset)
     Constructs a new logarithmic transform.
public  doublederivative(double value)
     Gets the derivative of this function at a value.
public  booleanequals(Object object)
     Compares the specified object with this math transform for equality.
public  ParameterDescriptorGroupgetParameterDescriptors()
     Returns the parameter descriptors for this math transform.
public  ParameterValueGroupgetParameterValues()
     Returns the parameter values for this math transform.
public  intgetSourceDimensions()
     Gets the dimension of input points, which is 1.
public  intgetTargetDimensions()
     Gets the dimension of output points, which is 1.
public  inthashCode()
     Returns a hash value for this transform.
public  MathTransforminverse()
     Creates the inverse transform of this object.
public  doubletransform(double value)
     Transforms the specified value.
public  voidtransform(float[] srcPts, int srcOff, float[] dstPts, int dstOff, int numPts)
     Transforms a list of coordinate point ordinal values.
public  voidtransform(double[] srcPts, int srcOff, double[] dstPts, int dstOff, int numPts)
     Transforms a list of coordinate point ordinal values.

Field Detail
base
final public double base(Code)
The base of the logarithm.



lnBase
final double lnBase(Code)
Natural logarithm of LogarithmicTransform1D.base .



offset
final public double offset(Code)
The offset to add to the logarithm.




Constructor Detail
LogarithmicTransform1D
LogarithmicTransform1D(ExponentialTransform1D inverse)(Code)
Constructs a new logarithmic transform which is the inverse of the supplied exponentional transform.



LogarithmicTransform1D
protected LogarithmicTransform1D(double base, double offset)(Code)
Constructs a new logarithmic transform. This constructor is provided for subclasses only. Instances should be created using the , which may returns optimized implementations for some particular argument values.
Parameters:
  base - The base of the logarithm.
Parameters:
  offset - The offset to add to the logarithm.




Method Detail
concatenate
MathTransform concatenate(MathTransform other, boolean applyOtherFirst)(Code)
Concatenates in an optimized way a MathTransform other to this MathTransform . This implementation can optimize some concatenation with LinearTransform1D and ExponentialTransform1D .
Parameters:
  other - The math transform to apply.
Parameters:
  applyOtherFirst - true if the transformation order is other followed by this , or false if the transformation order is this followed by other . The combined math transform, or null if no optimized combinedtransform is available.



create
public static MathTransform1D create(double base, double offset)(Code)
Constructs a new logarithmic transform.
Parameters:
  base - The base of the logarithm.
Parameters:
  offset - The offset to add to the logarithm.



derivative
public double derivative(double value)(Code)
Gets the derivative of this function at a value.



equals
public boolean equals(Object object)(Code)
Compares the specified object with this math transform for equality.



getParameterDescriptors
public ParameterDescriptorGroup getParameterDescriptors()(Code)
Returns the parameter descriptors for this math transform.



getParameterValues
public ParameterValueGroup getParameterValues()(Code)
Returns the parameter values for this math transform. A copy of the parameter values for this math transform.



getSourceDimensions
public int getSourceDimensions()(Code)
Gets the dimension of input points, which is 1.



getTargetDimensions
public int getTargetDimensions()(Code)
Gets the dimension of output points, which is 1.



hashCode
public int hashCode()(Code)
Returns a hash value for this transform. This value need not remain consistent between different implementations of the same class.



inverse
public MathTransform inverse()(Code)
Creates the inverse transform of this object.



transform
public double transform(double value)(Code)
Transforms the specified value.



transform
public void transform(float[] srcPts, int srcOff, float[] dstPts, int dstOff, int numPts)(Code)
Transforms a list of coordinate point ordinal values.



transform
public void transform(double[] srcPts, int srcOff, double[] dstPts, int dstOff, int numPts)(Code)
Transforms a list of coordinate point ordinal values.



Methods inherited from org.geotools.referencing.operation.transform.AbstractMathTransform
MathTransform concatenate(MathTransform other, boolean applyOtherFirst)(Code)(Java Doc)
public Shape createTransformedShape(Shape shape) throws TransformException(Code)(Java Doc)
final Shape createTransformedShape(Shape shape, AffineTransform preTransform, AffineTransform postTransform, int orientation) throws TransformException(Code)(Java Doc)
public Matrix derivative(Point2D point) throws TransformException(Code)(Java Doc)
public Matrix derivative(DirectPosition point) throws TransformException(Code)(Java Doc)
protected static void ensureNonNull(String name, Object object) throws IllegalArgumentException(Code)(Java Doc)
public boolean equals(Object object)(Code)(Java Doc)
protected String formatWKT(Formatter formatter)(Code)(Java Doc)
public ParameterDescriptorGroup getParameterDescriptors()(Code)(Java Doc)
public ParameterValueGroup getParameterValues()(Code)(Java Doc)
abstract public int getSourceDimensions()(Code)(Java Doc)
abstract public int getTargetDimensions()(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)
public MathTransform inverse() throws NoninvertibleTransformException(Code)(Java Doc)
static Matrix invert(Matrix matrix) throws NoninvertibleTransformException(Code)(Java Doc)
public boolean isIdentity()(Code)(Java Doc)
protected static boolean needCopy(int srcOff, int dimSource, int dstOff, int dimTarget, int numPts)(Code)(Java Doc)
protected static double rollLongitude(double x)(Code)(Java Doc)
static GeneralMatrix toGMatrix(Matrix matrix)(Code)(Java Doc)
static XMatrix toXMatrix(Matrix matrix)(Code)(Java Doc)
public Point2D transform(Point2D ptSrc, Point2D ptDst) throws TransformException(Code)(Java Doc)
public DirectPosition transform(DirectPosition ptSrc, DirectPosition ptDst) throws TransformException(Code)(Java Doc)
public void transform(float[] srcPts, int srcOff, float[] dstPts, int dstOff, int numPts) throws TransformException(Code)(Java Doc)

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