次のようなことを意味します...
(注意してください、赤い線は中心からの角度を示すためのガイドラインです。それは必要ありません;))
派手で豪華なものはgetSwordHandlePoint
、ハンドルを配置する必要があるベクトルに沿ったポイントを計算するメソッドにあります...
public class TestSword {
public static void main(String[] args) {
new TestSword();
}
public TestSword() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new SwordPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class SwordPane extends JPanel {
private BufferedImage character;
private BufferedImage sword;
private double angle = 0;
public SwordPane() {
try {
character = ImageIO.read(new File("character.png"));
sword = ImageIO.read(new File("Sword.png"));
} catch (IOException exp) {
exp.printStackTrace();
}
Timer timer = new Timer(100, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
angle += 10;
if (angle > 360) {
angle -= 360;
}
repaint();
}
});
timer.setRepeats(true);
timer.setCoalesce(true);
timer.start();
}
@Override
public Dimension getPreferredSize() {
int width = character.getHeight() + sword.getWidth();
int height = character.getHeight() + sword.getWidth();
return new Dimension(width * 2, height * 2);
}
protected Point getSwordHandlePoint() {
int radius = 272; // This is the height of the character...
int x = Math.round(getWidth() / 2);
int y = Math.round(getHeight() / 2);
double rads = Math.toRadians(angle - 180); // Make 0 point out to the right...
// If you add sword.getWidth, you might be able to change the above...
int fullLength = Math.round((radius / 2f)) - sword.getWidth();
// Calculate the outter point of the line
int xPosy = Math.round((float) (x + Math.cos(rads) * fullLength));
int yPosy = Math.round((float) (y - Math.sin(rads) * fullLength));
return new Point(xPosy, yPosy);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
int x = (getWidth() - character.getWidth()) / 2;
int y = (getHeight() - character.getHeight()) / 2;
g2d.drawImage(character, x, y, this);
x = getWidth() / 2;
y = getHeight() / 2;
Point p = getSwordHandlePoint();
g2d.setColor(Color.RED);
g2d.drawLine(x, y, p.x, p.y);
AffineTransform at = AffineTransform.getTranslateInstance(p.x, p.y);
at.rotate(Math.toRadians(-angle));
g2d.setTransform(at);
g2d.drawImage(sword, 0, 0, this);
g2d.dispose();
}
}
}
今、私のトリガーは絶望的ですが、絶望的ではありません。私はネットからアルゴリズムを「借りて」、自分のニーズに合わせて微調整しました...