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The Apache Commons Codec package contains simple encoder and decoders for various formats such as Base64 and Hexadecimal. In addition to these widely used encoders and decoders, the codec package also maintains a collection of phonetic encoding utilities.

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/*
* Copyright (c) 2005, Graph Builder
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of Graph Builder nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

package com.graphbuilder.curve;

/**
Curves that extend the ParametricCurve class are continuous and can use the
BinaryCurveApproximationAlgorithm class to generate a sequence of points that
approximate the curve.  Note: Approximate means a finite set of points that
are on the curve, not close to the curve.

@see com.graphbuilder.curve.BinaryCurveApproximationAlgorithm
@see com.graphbuilder.curve.Curve
*/
public abstract class ParametricCurve extends Curve {

	public ParametricCurve(ControlPath cp, GroupIterator gp) {
		super(cp, gp);
	}

	/**
	The eval method evaluates a point on a curve given a parametric value "t".  The parametric
	value "t" is stored in the last index location of the specified double array.  This value
	should not be changed.  The dimension of the point to evaluate is p.length - 1.  The result
	of the evaluation is placed in index locations 0 .. p.length - 2 (inclusive).

	The eval method should remain protected except for those curves that do no need any
	preparation to be done in the appendTo method.
	*/
	protected abstract void eval(double[] p);

	/**
	The sample limit specifies how many additional subdivisions are done to ensure that there
	are no missed pieces of the curve.  The sample limit must be >= 0.
	*/
	public abstract int getSampleLimit();
}