quaternion-java/fr/alnotz/Dual.java

package fr.alnotz;

public class Dual implements IsDual{
    private double r;
    private double d;
    public Dual(double r, double d){
        this.r = r;
        this.d = d;
    }
    public static Dual plus(IsDual dual0, IsDual dual1){
        return new Dual(dual0.getR() + dual1.getR(), dual0.getD() + dual1.getD());
    }
    @Override
    public double getR() {
        return this.r;
    }

    @Override
    public double getD() {
        return this.d;
    }

    @Override
    public void setR(double r) {
        this.r = r;
    }

    @Override
    public void setD(double d) {
        this.d = d;
    }

    @Override
    public void plus(IsDual dual) {
        this.r += dual.getR();
        this.d += dual.getD();
    }

    @Override
    public void times(IsDual dual) {
        this.r *= dual.getR();
        this.d = 2 * this.r * dual.getD();
    }

    @Override
    public boolean equals(IsDual dual) {
        return this.r == dual.getR() && this.d == dual.getR();
    }
}