Exemplo n.º 1
0
 public void start() {
   Dimension size = getSize();
   for (int i = 0; i < animpts.length; i += 2) {
     animpts[i + 0] = (float) (Math.random() * size.width);
     animpts[i + 1] = (float) (Math.random() * size.height);
     deltas[i + 0] = (float) (Math.random() * 4.0 + 2.0);
     deltas[i + 1] = (float) (Math.random() * 4.0 + 2.0);
     if (animpts[i + 0] > size.width / 6.0f) {
       deltas[i + 0] = -deltas[i + 0];
     }
     if (animpts[i + 1] > size.height / 6.0f) {
       deltas[i + 1] = -deltas[i + 1];
     }
   }
   anim = new Thread(this);
   anim.setPriority(Thread.MIN_PRIORITY);
   anim.start();
 }
Exemplo n.º 2
0
  public void run() {
    Thread me = Thread.currentThread();
    while (getSize().width <= 0) {
      try {
        anim.sleep(500);
      } catch (InterruptedException e) {
        return;
      }
    }

    Graphics2D g2d = null;
    Graphics2D BufferG2D = null;
    Graphics2D ScreenG2D = null;
    BasicStroke solid = new BasicStroke(9.0f, BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND, 9.0f);
    GeneralPath gp = new GeneralPath(GeneralPath.WIND_NON_ZERO);
    int rule = AlphaComposite.SRC_OVER;
    AlphaComposite opaque = AlphaComposite.SrcOver;
    AlphaComposite blend = AlphaComposite.getInstance(rule, 0.9f);
    AlphaComposite set = AlphaComposite.Src;
    int frame = 0;
    int frametmp = 0;
    Dimension oldSize = getSize();
    Shape clippath = null;
    while (anim == me) {
      Dimension size = getSize();
      if (size.width != oldSize.width || size.height != oldSize.height) {
        img = null;
        clippath = null;
        if (BufferG2D != null) {
          BufferG2D.dispose();
          BufferG2D = null;
        }
        if (ScreenG2D != null) {
          ScreenG2D.dispose();
          ScreenG2D = null;
        }
      }
      oldSize = size;

      if (img == null) {
        img = (BufferedImage) createImage(size.width, size.height);
      }

      if (BufferG2D == null) {
        BufferG2D = img.createGraphics();
        BufferG2D.setRenderingHint(
            RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_DEFAULT);
        BufferG2D.setClip(clippath);
      }
      g2d = BufferG2D;

      float[] ctrlpts;
      for (int i = 0; i < animpts.length; i += 2) {
        animate(animpts, deltas, i + 0, size.width);
        animate(animpts, deltas, i + 1, size.height);
      }
      ctrlpts = animpts;
      int len = ctrlpts.length;
      gp.reset();
      int dir = 0;
      float prevx = ctrlpts[len - 2];
      float prevy = ctrlpts[len - 1];
      float curx = ctrlpts[0];
      float cury = ctrlpts[1];
      float midx = (curx + prevx) / 2.0f;
      float midy = (cury + prevy) / 2.0f;
      gp.moveTo(midx, midy);
      for (int i = 2; i <= ctrlpts.length; i += 2) {
        float x1 = (midx + curx) / 2.0f;
        float y1 = (midy + cury) / 2.0f;
        prevx = curx;
        prevy = cury;
        if (i < ctrlpts.length) {
          curx = ctrlpts[i + 0];
          cury = ctrlpts[i + 1];
        } else {
          curx = ctrlpts[0];
          cury = ctrlpts[1];
        }
        midx = (curx + prevx) / 2.0f;
        midy = (cury + prevy) / 2.0f;
        float x2 = (prevx + midx) / 2.0f;
        float y2 = (prevy + midy) / 2.0f;
        gp.curveTo(x1, y1, x2, y2, midx, midy);
      }
      gp.closePath();

      g2d.setComposite(set);
      g2d.setBackground(backgroundColor);
      g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);

      if (bgChanged || bounds == null) {
        bounds = new Rectangle(0, 0, getWidth(), getHeight());
        bgChanged = false;
      }
      // g2d.clearRect(bounds.x-5, bounds.y-5, bounds.x + bounds.width + 5, bounds.y + bounds.height
      // + 5);
      g2d.clearRect(0, 0, getWidth(), getHeight());

      g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
      g2d.setColor(outerColor);
      g2d.setComposite(opaque);
      g2d.setStroke(solid);
      g2d.draw(gp);
      g2d.setPaint(gradient);

      if (!bgChanged) {
        bounds = gp.getBounds();
      } else {
        bounds = new Rectangle(0, 0, getWidth(), getHeight());
        bgChanged = false;
      }
      gradient =
          new GradientPaint(
              bounds.x,
              bounds.y,
              gradientColorA,
              bounds.x + bounds.width,
              bounds.y + bounds.height,
              gradientColorB,
              true);
      g2d.setComposite(blend);
      g2d.fill(gp);

      if (g2d == BufferG2D) {
        repaint();
      }
      ++frame;
      Thread.yield();
    }
    if (g2d != null) {
      g2d.dispose();
    }
  }