Package org.apache.sis.referencing.operation.transform

Class LinearInterpolator1D.Inverse

java.lang.Object

org.apache.sis.io.wkt.FormattableObject

org.apache.sis.referencing.operation.transform.AbstractMathTransform

org.apache.sis.referencing.operation.transform.AbstractMathTransform.Inverse

org.apache.sis.referencing.operation.transform.AbstractMathTransform1D.Inverse

org.apache.sis.referencing.operation.transform.LinearInterpolator1D.Inverse

All Implemented Interfaces:

Serializable, Parameterized, LenientComparable, org.opengis.referencing.operation.MathTransform, org.opengis.referencing.operation.MathTransform1D

Enclosing class:

LinearInterpolator1D

private static final class LinearInterpolator1D.Inverse
extends AbstractMathTransform1D.Inverse
implements org.opengis.referencing.operation.MathTransform1D, Serializable

The inverse of the enclosing LinearInterpolator1D. Given a y value, this class performs a bilinear search for locating the lower and upper x values as integers, then interpolates the x real value.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.sis.referencing.operation.transform.AbstractMathTransform

AbstractMathTransform.Inverse

Field Summary

Fields

Modifier and Type	Field	Description
private final LinearInterpolator1D	forward	The enclosing transform.
private static final long	serialVersionUID	For cross-version compatibility.

Fields inherited from class org.apache.sis.referencing.operation.transform.AbstractMathTransform

MAXIMUM_BUFFER_SIZE, MAXIMUM_FAILURES

Constructor Summary

Constructors

Constructor	Description
Inverse(LinearInterpolator1D forward)	Creates a new inverse transform.

Method Summary

Modifier and Type	Method	Description
double	derivative(double y)	Returns the derivative at the given y value.
org.opengis.referencing.operation.MathTransform1D	inverse()	Returns the inverse of this math transform.
double	transform(double y)	Locates by bilinear search and interpolates the x value for the given y.
org.opengis.referencing.operation.Matrix	transform(double[] srcPts, int srcOff, double[] dstPts, int dstOff, boolean derivate)	Combines transform(double), derivative(double) in a single method call.

Methods inherited from class org.apache.sis.referencing.operation.transform.AbstractMathTransform1D.Inverse

derivative

Methods inherited from class org.apache.sis.referencing.operation.transform.AbstractMathTransform.Inverse

beforeFormat, computeHashCode, equals, formatTo, getDomain, getSourceDimensions, getTargetDimensions, isIdentity

Methods inherited from class org.apache.sis.referencing.operation.transform.AbstractMathTransform

equals, getContextualParameters, getParameterDescriptors, getParameterValues, hashCode, isInverseEquals, mismatchedDimension, transform, transform, transform, transform, transform, tryConcatenate

Methods inherited from class org.apache.sis.io.wkt.FormattableObject

print, toString, toString, toWKT

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.opengis.referencing.operation.MathTransform

derivative, getSourceDimensions, getTargetDimensions, isIdentity, toWKT, transform, transform, transform, transform, transform

Field Details

serialVersionUID

private static final long serialVersionUID

For cross-version compatibility.

See Also:

• Constant Field Values

forward

private final LinearInterpolator1D forward

The enclosing transform.

Constructor Details

Inverse

Inverse(LinearInterpolator1D forward)

Creates a new inverse transform.

Method Details

inverse

public org.opengis.referencing.operation.MathTransform1D inverse()

Returns the inverse of this math transform.

Specified by:

inverse in interface org.opengis.referencing.operation.MathTransform

Specified by:

inverse in interface org.opengis.referencing.operation.MathTransform1D

Specified by:

inverse in class AbstractMathTransform1D.Inverse

Returns:

the inverse of this transform.

transform

public org.opengis.referencing.operation.Matrix transform(double[] srcPts,
 int srcOff,
 double[] dstPts,
 int dstOff,
 boolean derivate)
                                                   throws org.opengis.referencing.operation.TransformException

Combines transform(double), derivative(double) in a single method call. The intent is to avoid to call Arrays.binarySearch(double[], double) twice for the same value.

Overrides:

transform in class AbstractMathTransform1D.Inverse

Parameters:

srcPts - the array containing the source coordinates (cannot be null).

srcOff - the offset to the point to be transformed in the source array.

dstPts - the array into which the transformed coordinates is returned. May be the same than srcPts. May be null if only the derivative matrix is desired.

dstOff - the offset to the location of the transformed point that is stored in the destination array.

derivate - true for computing the derivative, or false if not needed.

Returns:

the matrix of the transform derivative at the given source position, or null if the derivate argument is false.

Throws:

org.opengis.referencing.operation.TransformException - if the point cannot be transformed or if a problem occurred while calculating the derivative.

See Also:

• AbstractMathTransform.derivative(DirectPosition)
• AbstractMathTransform.transform(DirectPosition, DirectPosition)
• MathTransforms.derivativeAndTransform(MathTransform, double[], int, double[], int)

transform

public double transform(double y)

Locates by bilinear search and interpolates the x value for the given y.

Specified by:

transform in interface org.opengis.referencing.operation.MathTransform1D

derivative

public double derivative(double y)

Returns the derivative at the given y value.

Specified by:

derivative in interface org.opengis.referencing.operation.MathTransform1D