JSci.physics.Spring Maven / Gradle / Ivy

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JSci is a set of open source Java packages. The aim is to encapsulate scientific methods/principles in the most natural way possible. As such they should greatly aid the development of scientific based software. It offers: abstract math interfaces, linear algebra (support for various matrix and vector types), statistics (including probability distributions), wavelets, newtonian mechanics, chart/graph components (AWT and Swing), MathML DOM implementation, ... Note: some packages, like javax.comm, for the astro and instruments package aren't listed as dependencies (not available).

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package JSci.physics;

import JSci.maths.vectors.AbstractDoubleVector;
import JSci.maths.vectors.DoubleVector;

public class Spring {
        private final double coefficient;
        private AbstractDoubleVector x;

        /**
        * Constructs a mechanical spring.
        * @param coeff the spring constant.
        */
        public Spring(double coeff) {
                coefficient = coeff;
        }
        public void setPosition(AbstractDoubleVector pos) {
                x = pos;
        }
        public AbstractDoubleVector getPosition() {
                return x;
        }
        /**
        * Returns the potential energy of a particle attached to this spring.
        */
        public double energy(AbstractClassicalParticle p) {
                double rr = 0.0;
                AbstractDoubleVector ppos = p.getPosition();
                for(int i=0; i