LACS2013_PolarMode.java

//PolarMode.java    MrG 2013.0531
public class PolarMode
{
    private double a;
    private double b;
    private double n;
    private double xMin;
    private double xMax;
    private double yMin;
    private double yMax;

    public PolarMode(double a, double b, double n, double xMin, double xMax, double yMin, double yMax)
    {
        this.a=a;
        this.b=b;
        this.n=n;
        this.xMin=xMin;
        this.xMax=xMax;
        this.yMin=yMin;
        this.yMax=yMax;
    }

    public void axes()
    {
        StdDraw.setPenRadius(.005);
        StdDraw.line(0,yMin,0,yMax);
        StdDraw.line(xMin,0,xMax,0);
        StdDraw.text(xMax,-1,"x");
        StdDraw.text(1,yMax,"y");
    }

    public void grid()
    {
        StdDraw.setPenRadius(.001);
        StdDraw.setPenColor(StdDraw.BLUE);
        for(double r=0; r<=xMax; r++)
        {
            StdDraw.circle(0,0,r);
        }
    }

    public void plot()
    {
        StdDraw.setPenRadius(.001);
        StdDraw.setPenColor(StdDraw.GREEN);
        double x0=a+b;
        double y0=0;
        for(double t=0; t<2*Math.PI; t+=0.01)
        {
            double r=a+b*Math.sin(n*t);
            double x=r*Math.cos(t);
            double y=r*Math.sin(t);
            StdDraw.line(x0,y0,x,y);
            x0=x;
            y0=y;
        }
    }
}