private static void draw(int frame) {
// Draw Worm
int offset = pos[frame] + 1;
int len = skel[offset - 1];
double[] x = new double[len];
double[] y = new double[len];
double _x = 0;
double _y = 0;
for (int i = 0; i < len; i++) {
int s = i * 2;
x[i] = skel[offset + s];
y[i] = skel[offset + s + 1];
_x += x[i];
_y += y[i];
}
_x /= len;
_y /= len;
StdDraw.clear();
StdDraw.setPenColor(StdDraw.BLACK);
StdDraw.text(0, 120, "" + frame);
StdDraw.setPenRadius(0.003);
StdDraw.setXscale(-128, 128);
StdDraw.setYscale(-128, 128);
for (int i = 0; i < len; i++) {
x[i] -= _x;
y[i] -= _y;
StdDraw.point(x[i], y[i]);
}
StdDraw.setPenColor(StdDraw.GREEN);
StdDraw.setPenRadius(0.01);
StdDraw.point(x[0], y[0]);
StdDraw.setXscale(-128, 128);
StdDraw.setYscale(128, -128);
StdDraw.setPenColor(StdDraw.MAGENTA);
StdDraw.setPenRadius(0.005);
// Recreate from vectors
offset = frame * n;
x = new double[n + 1];
y = new double[n + 1];
double dist = 3.0;
for (int i = 0; i < n; i++) {
x[i + 1] = x[i] + (dist * Math.sin(vec[offset + i]));
y[i + 1] = y[i] + (dist * Math.cos(vec[offset + i]));
}
_x = 0;
_y = 0;
for (int i = 0; i < n + 1; i++) {
_x += x[i];
_y += y[i];
}
_x /= n + 1;
_y /= n + 1;
for (int i = 0; i < n + 1; i++) {
x[i] -= _x;
y[i] -= _y;
StdDraw.point(x[i], y[i]);
}
}
// init
private static void init() {
if (frame != null) frame.setVisible(false);
frame = new JFrame();
offscreenImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
onscreenImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
offscreen = offscreenImage.createGraphics();
onscreen = onscreenImage.createGraphics();
setXscale();
setYscale();
offscreen.setColor(DEFAULT_CLEAR_COLOR);
offscreen.fillRect(0, 0, width, height);
setPenColor();
setPenRadius();
setFont();
clear();
// add antialiasing
RenderingHints hints =
new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
hints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
offscreen.addRenderingHints(hints);
// frame stuff
ImageIcon icon = new ImageIcon(onscreenImage);
JLabel draw = new JLabel(icon);
draw.addMouseListener(std);
draw.addMouseMotionListener(std);
frame.setContentPane(draw);
frame.addKeyListener(std); // JLabel cannot get keyboard focus
frame.setResizable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // closes all windows
// frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); // closes only current window
frame.setTitle("Standard Draw");
frame.setJMenuBar(createMenuBar());
frame.pack();
frame.requestFocusInWindow();
frame.setVisible(true);
}
/** Set the pen color to the default color (black). */
public static void setPenColor() {
setPenColor(DEFAULT_PEN_COLOR);
}