annotate src/samer/units/Oscillator.java @ 8:5e3cbbf173aa tip

Reorganise some more

package	samer.units;
import 	samer.core.*;
import 	samer.core.types.*;
import 	samer.maths.*;
import		java.util.*;

public class Oscillator implements Generator
{
	double c, s;
	double x1, x2;

	public Oscillator(double f) {	setFrequency(f); reset(); }

	public DoubleModel getFrequencyModel() {
		return new DoubleModel() {
			public void set(double f) { setFrequency(f); }
			public double get() { return Math.atan(s/c); }
		};
	}

	public void reset() { x1=1; x2=0; }
	public void setFrequency(double f) {
		s=Math.sin(f);
		c=Math.cos(f);
	}

	public void dispose() {}
	public double next()
	{
		double y1 = x1*c - x2*s;
		double y2 = x1*s + x2*c;
		x1=y1; x2=y2;
		return x2;
	}

	public void next(double [] x)	{
		for (int i=0; i<x.length; i++) x[i]=next();
	}

	public String toString() { return "oscillator"; }
}