摆动动画

问题描述

我有一个动画，并想以使其逐渐消失，当它到达显示区域的左侧

I have an animation, and would like to make it disappear progressively when it reaches the left side of the display area.

AffineTransform at = new AffineTransform();
at.scale(-1, 1);
at.translate((-clip.x + (clip.x - xPositionToPixel(imgX))), clip.y - 1);
if ((clip.x - clip.width) < (at.getTranslateX() - bufImg.getWidth())) {
  g2d.drawImage(bufImg, at, null);
} else {
at = new AffineTransform();
                    at.scale(-1, 1);
                    at.translate((-clip.x + (clip.x - xPositionToPixel(imgX))), clip.y - 1);
                    g2d.drawImage(bufImg, (int)at.getTranslateX(), clip.y - 1, (int)(bufImg.getWidth() - (xPositionToPixel(imgX) + bufImg.getWidth())), clip.height, null);
}

我画从右到左的动画，这就是为什么我缩放和平移每个坐标的原因。 clip.x是显示区域的开始，和IMGX是新的x坐标。

I'm drawing the animation from right to left, that is the reason why i scale and translate each the coordinate. clip.x is the start of the display area, and imgX is the new x coordinate.

感谢您的帮助。

我想实现我想要的，最接近的是这样的几个方式：

I tried several way of achieving what i want and the closest is this :

AffineTransform at = new AffineTransform();
at.scale(-1, 1);
at.translate((-clip.x + (clip.x - xPositionToPixel(imgX))), clip.y - 1);

if ((clip.x - clip.width) < (at.getTranslateX() - bufImg.getWidth())) {
  g2d.drawImage(bufImg, at, null);
} else {
at = new AffineTransform();
                    at.scale(-1, 1);
                    at.translate((-clip.x + (clip.x - xPositionToPixel(imgX))), clip.y - 1);
                    g2d.drawImage(bufImg, (int)at.getTranslateX(), clip.y - 1, (int)(bufImg.getWidth() - (xPositionToPixel(imgX) + bufImg.getWidth())), clip.height, null);
}

但仍然没有一个很好的soluation有我只是我的萎缩图像的宽度，但仍然绘制完全。

But still not a good soluation has i'm just shrinking the width of my image, but still draw it entirely.

推荐答案

还是不知道到底是什么问题（动画或变换？），这里有一个简单的片段一起玩：

Still don't know what exactly the problem is (animation or transform?), here's a simple snippet to play with:

    final JButton button = new JButton("Swinging!");
    button.setSize(button.getPreferredSize());
    button.doLayout();
    final BufferedImage image = new BufferedImage(
            button.getWidth(), button.getHeight(), BufferedImage.TYPE_INT_RGB);
    Graphics2D g = image.createGraphics();
    button.paint(g);
    g.dispose();
    final Point location = new Point(500, 100);
    final JPanel panel = new JPanel() {
        @Override
        protected void paintComponent(Graphics g) {
            super.paintComponent(g);
            Graphics2D gd = (Graphics2D) g.create();
            gd.translate(location.x, location.y);
            gd.scale(-1, 1);
            gd.drawImage(image, 0, 0, this);
            gd.dispose();
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(button.getWidth()* 10, button.getHeight() * 20);
        }


    };
    ActionListener l = new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {
            location.x -= 5;
            panel.repaint();
            if (location.x < - button.getWidth()) {
                ((Timer) e.getSource()).stop();
            }
        }
    };
    new Timer(100, l).start();

这篇关于摆动动画的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！