// mas964 ps5

import java.applet.*;
import java.awt.*;
import java.lang.Math;
import java.lang.String;
import StrokeAnimator;

public class BreatheStroke extends StrokeAnimator {
  int frameNumber = 0;
  int radii[] = {8, 8, 8, 8, 9, 10, 11, 12, 12, 11, 10, 9};

  // draw a bunch of circles at the mouse locations. Radii vary
  // over time (or frame number) - the whole effect is supposed to
  // look like the line is breathing.
  public void drawFrame(int ms) {
    Graphics g = imageBuffer.getGraphics();
    this.clearImageBuffer();
    g.setColor(this.getForeground());

    if (numPoints <= 0)
      return;

    int i;
    
    int radius = radii[frameNumber % radii.length];
    for (i = 0; i < numPoints; i++)
      centeredCircle(g, x[i], y[i], radius);
    frameNumber++;
    repaint(); 
  }

  public void centeredCircle(Graphics g, int x, int y, int radius) {
    g.fillOval(x - radius, y - radius, radius * 2 + 1, radius * 2 + 1);
  }
  
  public void init() {
    this.setBackground(Color.white);
    this.setForeground(Color.black);
    super.init();
    if (frameDelay == 0) {
      frameDelay = 250;
    }
  }
}