/************************************************************************* * * * 1) This source code file, in unmodified form, and compiled classes * * derived from it can be used and distributed without restriction, * * including for commercial use. (Attribution is not required * * but is appreciated.) * * * * 2) Modified versions of this file can be made and distributed * * provided: the modified versions are put into a Java package * * different from the original package, edu.hws; modified * * versions are distributed under the same terms as the original; * * and the modifications are documented in comments. (Modification * * here does not include simply making subclasses that belong to * * a package other than edu.hws, which can be done without any * * restriction.) * * * * David J. Eck * * Department of Mathematics and Computer Science * * Hobart and William Smith Colleges * * Geneva, New York 14456, USA * * Email: eck@hws.edu WWW: http://math.hws.edu/eck/ * * * *************************************************************************/ package edu.hws.jcm.draw; import edu.hws.jcm.data.*; /** * A Tangent line is a line that is tangent to the graph of a specified function of one argument * at a specified value of its argument. If added to a CoordinateRect, it will appear * as a line. * A TangentLine is a Computable object, so should be added to a Controller to be * recomputed when the Value or Function changes. * */ 00038 public class TangentLine extends DrawGeometric { /** * Create a tangent line to the graph of a function. * * @param x The x-coordinate where the tangent is drawn. * @param f The line is tangent to the graph of this function. This should be a function of one variable. */ 00046 public TangentLine(Value x, Function f) { super(INFINITE_LINE_RELATIVE, x, new ValueMath(f,x), new Constant(1), new ValueMath(f.derivative(1), x)); } }

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