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| package test;
import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.TexturePaint;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Optional;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class Main extends JPanel {
private static final Color TRANSPARENT_COLOR = new Color(0, 0, 0, 0);
// Source : carte quand elle est dans son état visible.
private final BufferedImage mapVisible;
// Source : carte quand elle est dans son état cachée par le brouillard de guerre (ici en niveau de gris et sans ennemis).
private final BufferedImage mapFog;
// Masque de la zone dans le champ visuel du joueur.
private final BufferedImage playerMask;
// Masque de la zone dans le champ visuel du joueur.
private final BufferedImage fogMask;
// Masque contenant les zones que le joueur a visité.
private final BufferedImage visibleBuffer;
// Buffer écran : les parties de la zone visitées par le joueur (sous brouillard de guerre).
private final BufferedImage fogBuffer;
// Buffer écran : les parties de la zone visibles par le joueur.
private final BufferedImage visitedMask;
// Texture des nuages qui sera affichée sur les zones non-visitées.
private final TexturePaint cloudTexture;
public Main() throws IOException {
super();
setMinimumSize(new Dimension(500, 500));
setPreferredSize(new Dimension(500, 500));
setMaximumSize(new Dimension(500, 500));
mapVisible = ImageIO.read(getClass().getResource("mapvisible.png"));
mapFog = ImageIO.read(getClass().getResource("mapfog.png"));
playerMask = ImageIO.read(getClass().getResource("playermask.png"));
fogMask = ImageIO.read(getClass().getResource("fogMask.png"));
visibleBuffer = new BufferedImage(500, 500, BufferedImage.TYPE_INT_ARGB);
fogBuffer = new BufferedImage(500, 500, BufferedImage.TYPE_INT_ARGB);
visitedMask = new BufferedImage(500, 500, BufferedImage.TYPE_INT_ARGB);
final BufferedImage cloudImage = ImageIO.read(getClass().getResource("clouds.png"));
cloudTexture = new TexturePaint(cloudImage, new Rectangle(0, 0, cloudImage.getWidth(), cloudImage.getHeight()));
addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseMoved(MouseEvent mouseEvent) {
setPlayerPosition(new Point(mouseEvent.getX(), mouseEvent.getY()));
}
});
addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseEntered(MouseEvent mouseEvent) {
setPlayerPosition(new Point(mouseEvent.getX(), mouseEvent.getY()));
}
@Override
public void mouseExited(MouseEvent e) {
setPlayerPosition(null);
}
});
addPropertyChangeListener("playerPosition", propertyChangeEvent -> updatePlayerPosition());
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
final Graphics2D g2d = (Graphics2D) g.create();
try {
g2d.setPaint(cloudTexture);
g2d.fillRect(0, 0, getWidth(), getHeight());
g2d.drawImage(fogBuffer, 0, 0, null);
g2d.drawImage(visibleBuffer, 0, 0, null);
} finally {
g2d.dispose();
}
}
////////////////////////////////////////////////////////////////////////////
private Point lasPosition;
private void updatePlayerPosition() {
final Graphics2D visitedg2d = visitedMask.createGraphics();
final Graphics2D fogg2d = fogBuffer.createGraphics();
final Graphics2D visibleg2d = visibleBuffer.createGraphics();
// Clear visible area with transparent color.
clearSurface(visibleg2d, visibleBuffer.getWidth(), visibleBuffer.getHeight());
final Optional<Point> positionOptional = Optional.ofNullable(getPlayerPosition());
positionOptional.ifPresent(position -> {
if (lasPosition == null || lasPosition.distance(position) > 30) {
// Visited mask.
visitedg2d.setComposite(AlphaComposite.SrcOver);
visitedg2d.drawImage(fogMask, position.x - fogMask.getWidth() / 2, position.y - fogMask.getHeight() / 2, null);
// Visited area.
// Clear fog area with transparent color.
clearSurface(fogg2d, fogBuffer.getWidth(), fogBuffer.getHeight());
fogg2d.setComposite(AlphaComposite.SrcOver);
fogg2d.drawImage(visitedMask, 0, 0, null);
fogg2d.setComposite(AlphaComposite.SrcIn);
fogg2d.drawImage(mapFog, 0, 0, null);
lasPosition = position;
}
// Visible area.
visibleg2d.setComposite(AlphaComposite.SrcOver);
visibleg2d.drawImage(playerMask, position.x - playerMask.getWidth() / 2, position.y - playerMask.getHeight() / 2, null);
visibleg2d.setComposite(AlphaComposite.SrcIn);
visibleg2d.drawImage(mapVisible, 0, 0, null);
});
visitedg2d.dispose();
fogg2d.dispose();
visibleg2d.dispose();
repaint();
}
private void clearSurface(final Graphics2D g2d, final int width, final int height) {
g2d.setComposite(AlphaComposite.SrcOver);
g2d.setPaint(Color.BLACK);
g2d.fillRect(0, 0, width, height);
g2d.setComposite(AlphaComposite.SrcIn);
g2d.setPaint(TRANSPARENT_COLOR);
g2d.fillRect(0, 0, width, height);
g2d.setComposite(AlphaComposite.SrcOver);
}
////////////////////////////////////////////////////////////////////////////
public final void setPlayerPosition(final Point value) {
putClientProperty("playerPosition", value);
}
public final Point getPlayerPosition() {
return (Point) getClientProperty("playerPosition");
}
////////////////////////////////////////////////////////////////////////////
public static void main(String[] args) {
SwingUtilities.invokeLater(Main::createUI);
}
private static void createUI() {
try {
final Main main = new Main();
final JFrame jframe = new JFrame("Test");
jframe.setLayout(new BorderLayout());
jframe.add(main, BorderLayout.CENTER);
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jframe.setResizable(false);
jframe.setVisible(true);
jframe.pack();
} catch (IOException ex) {
Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
}
}
} |
