mathtransform1d.java

GEo 地理操作源代码

/*$************************************************************************************************
 **
 ** $Id: MathTransform1D.java,v 1.1 2004/05/06 15:51:51 desruisseaux Exp $
 **
 ** $Source: /cvsroot/geoapi/src/org/opengis/referencing/operation/MathTransform1D.java,v $
 **
 ** Copyright (C) 2003 Open GIS Consortium, Inc. All Rights Reserved. http://www.opengis.org/Legal/
 **
 *************************************************************************************************/
package org.opengis.referencing.operation;


/**
 * Transforms one-dimensional coordinate points.
 * {@link CoordinateOperation#getMathTransform} may returns instance of this
 * interface when source and destination coordinate systems are both one dimensional.
 * <code>MathTransform1D</code> extends {@link MathTransform} by adding a simple method
 * transforming a value without the overhead of creating data array.
 *
 * @author <A HREF="http://www.opengis.org">OpenGIS&reg; consortium</A>
 * @version 1.0
 */
public interface MathTransform1D extends MathTransform {
    /**
     * Transforms the specified value.
     *
     * @param value The value to transform.
     * @return the transformed value.
     * @throws TransformException if the value can't be transformed.
     */
    double transform(final double value) throws TransformException;
    
    /**
     * Gets the derivative of this function at a value. The derivative is the
     * 1&times;1 matrix of the non-translating portion of the approximate affine
     * map at the value.
     *
     * @param  value The value where to evaluate the derivative.
     * @return The derivative at the specified point.
     * @throws TransformException if the derivative can't be evaluated at the
     *         specified point.
     */
    double derivative(final double value) throws TransformException;
}