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java - 基于带整数的文件在 Canvas 上平铺绘图

转载 作者:塔克拉玛干 更新时间:2023-11-02 19:28:36 25 4
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所以我试图根据一个包含整数的文件制作 map

1111111111
1000000001
1000000001
1000000001
1111111111

所以我得到的代码是显示 1 的草地 block (32x32) 和 0 的土 block 。

这是我用于加载和区分 2 的代码。

protected void loadMapFile(String string) throws Exception {
// TODO Load Map, Put into int array
File f = new File(string);
BufferedReader in = new BufferedReader(new FileReader(f));
String line = in.readLine();

cols = line.length();
rows = count(string) + 1;
System.out.println(rows);

lines = new String[rows];
map = new Image[cols][rows];
mapMask = new int[cols][rows];

while (line != null) {
lines[counter] = line;
counter++;
line = in.readLine();
}

for (int y = 0; y < rows; y++) {
for (int x = 0; x < cols; x++) {
mapMask[x][y] = Integer.parseInt(lines[y].substring(x, x + 1));
System.out.print(mapMask[x][y]);
setImageContent(x, y);

}
System.out.println("");
}
mapCreated = true;

}




private void setImageContent(int x, int y) {
switch (mapMask[x][y]) {
case 0:// dirt
map[x][y] = Images.DirtTile.getImage();
break;
case 1:// grass
map[x][y] = Images.GrassTile.getImage();
break;
}
}

在我的绘画方法中,我是这样画的:

public void paintComponent(Graphics g) {
if (mapCreated) {
for (int y = 0; y < endRows; y++) {
for (int x = 0; x < endCols; x++) {
g.drawImage(map[x][y], 0 + (x * 32), 0 + (y * 32),
32 + (x * 32), 32 + (y * 32), 0, 0, 32, 32, this);
}
}
}

}

我的问题是,你们会推荐这个吗?还有没有更简单的方法可以将 Tiles 渲染到屏幕上?

最佳答案

  • 您应该使用 for 循环将图 block 最初绘制到更大的 BufferedImage 并将 BufferedImage 保存到类字段。
  • 然后使用 drawImage 在 paintComponent(...) 中绘制单个 BufferedImage。这将使绘图更加高效。
  • 当然,除非您的瓷砖快速连续变化。

另一种方法是将图 block 放入 ImageIcons,将图标放入 JLabel 数组。例如:

import java.awt.Color;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.image.BufferedImage;

import javax.swing.*;

@SuppressWarnings("serial")
public class GridExample extends JPanel {
public static final int[][] MAP = {
{1, 0, 0, 2, 2, 2, 2, 2, 2, 2, 2},
{1, 1, 0, 0, 2, 2, 2, 2, 2, 2, 2},
{1, 1, 1, 0, 2, 2, 2, 2, 2, 2, 2},
{1, 1, 1, 0, 0, 2, 2, 2, 2, 2, 2},
{1, 1, 1, 1, 0, 2, 2, 2, 2, 2, 2},
{1, 1, 1, 0, 0, 0, 2, 2, 2, 2, 2},
{1, 1, 0, 0, 0, 2, 2, 2, 2, 2, 2},
{1, 1, 1, 0, 0, 0, 2, 2, 2, 2, 2},
{1, 1, 1, 1, 1, 0, 0, 0, 0, 2, 2},
{1, 1, 1, 1, 1, 0, 0, 0, 2, 2, 2},
{1, 1, 1, 1, 1, 1, 0, 0, 0, 2, 2}
};

public static final Color[] COLORS = {};
private JLabel[][] labelGrid = new JLabel[MAP.length][MAP[0].length];

public GridExample() {
setLayout(new GridLayout(MAP.length, MAP[0].length));
for (int r = 0; r < labelGrid.length; r++) {
for (int c = 0; c < labelGrid[r].length; c++) {
labelGrid[r][c] = new JLabel();
labelGrid[r][c].setIcon(Ground.getGround(MAP[r][c]).getIcon());
add(labelGrid[r][c]);
}
}
}

private static void createAndShowGui() {
GridExample mainPanel = new GridExample();

JFrame frame = new JFrame("GridExample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}

public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}

enum Ground {
DIRT(0, new Color(205,133, 63)), GRASS(1, new Color(0, 107, 60)),
WATER(2, new Color(29, 172, 214));
private int value;
private Color color;
private Icon icon;

private Ground(int value, Color color) {
this.value = value;
this.color = color;

icon = createIcon(color);
}

private Icon createIcon(Color color) {
int width = 24; // how to use const in enum?
BufferedImage img = new BufferedImage(width, width, BufferedImage.TYPE_INT_ARGB);
Graphics g = img.getGraphics();
g.setColor(color);
g.fillRect(0, 0, width, width);
g.dispose();
return new ImageIcon(img);
}

public int getValue() {
return value;
}

public Color getColor() {
return color;
}

public Icon getIcon() {
return icon;
}

public static Ground getGround(int value) {
for (Ground ground : Ground.values()) {
if (ground.getValue() == value) {
return ground;
}
}
return null;
}

}

示例 2:可以通过鼠标按下来更改图标的 Grid:

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;

import javax.swing.*;

@SuppressWarnings("serial")
public class GridExample extends JPanel {
private Ground[][] groundMap = {
{ Ground.GRASS, Ground.DIRT, Ground.DIRT, Ground.WATER, Ground.WATER,
Ground.WATER, Ground.WATER, Ground.WATER, Ground.WATER,
Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.DIRT, Ground.DIRT, Ground.WATER,
Ground.WATER, Ground.WATER, Ground.WATER, Ground.WATER,
Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.GRASS, Ground.DIRT, Ground.WATER,
Ground.WATER, Ground.WATER, Ground.WATER, Ground.WATER,
Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.GRASS, Ground.DIRT, Ground.DIRT,
Ground.WATER, Ground.WATER, Ground.WATER, Ground.WATER,
Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.GRASS, Ground.GRASS, Ground.DIRT,
Ground.WATER, Ground.WATER, Ground.WATER, Ground.WATER,
Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.GRASS, Ground.DIRT, Ground.DIRT,
Ground.DIRT, Ground.WATER, Ground.WATER, Ground.WATER,
Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.DIRT, Ground.DIRT, Ground.DIRT,
Ground.WATER, Ground.WATER, Ground.WATER, Ground.WATER,
Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.GRASS, Ground.DIRT, Ground.DIRT,
Ground.DIRT, Ground.WATER, Ground.WATER, Ground.WATER,
Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.GRASS, Ground.GRASS,
Ground.GRASS, Ground.DIRT, Ground.DIRT, Ground.DIRT,
Ground.DIRT, Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.GRASS, Ground.GRASS,
Ground.GRASS, Ground.DIRT, Ground.DIRT, Ground.DIRT,
Ground.WATER, Ground.WATER, Ground.WATER },
{ Ground.GRASS, Ground.GRASS, Ground.GRASS, Ground.GRASS,
Ground.GRASS, Ground.GRASS, Ground.DIRT, Ground.DIRT,
Ground.DIRT, Ground.WATER, Ground.WATER }, };

private JLabel[][] labelGrid = new JLabel[groundMap.length][groundMap[0].length];

public GridExample() {
setLayout(new GridLayout(groundMap.length, groundMap[0].length));
for (int r = 0; r < labelGrid.length; r++) {
for (int c = 0; c < labelGrid[r].length; c++) {
labelGrid[r][c] = new JLabel();
labelGrid[r][c].setIcon(groundMap[r][c].getIcon());
add(labelGrid[r][c]);
}
}

addMouseListener(new MyMouseListener());
}

private class MyMouseListener extends MouseAdapter {
@Override
public void mousePressed(MouseEvent mEvt) {
Component comp = getComponentAt(mEvt.getPoint());
for (int row = 0; row < labelGrid.length; row++) {
for (int col = 0; col < labelGrid[row].length; col++) {
if (labelGrid[row][col] == comp) {
Ground ground = groundMap[row][col];
int mapCode = ground.getValue();
mapCode++;
mapCode %= Ground.values().length;
groundMap[row][col] = Ground.values()[mapCode];
labelGrid[row][col].setIcon(groundMap[row][col].getIcon());
}
}
}
}
}

private static void createAndShowGui() {
GridExample mainPanel = new GridExample();

JFrame frame = new JFrame("GridExample");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}

public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}

enum Ground {
DIRT(0, new Color(205, 133, 63)), GRASS(1, new Color(0, 107, 60)), WATER(2,
new Color(29, 172, 214));
private int value;
private Color color;
private Icon icon;

private Ground(int value, Color color) {
this.value = value;
this.color = color;

icon = createIcon();
}

private Icon createIcon() {
int width = 24;
BufferedImage img = new BufferedImage(width, width,
BufferedImage.TYPE_INT_ARGB);
Graphics g = img.getGraphics();
g.setColor(color);
g.fillRect(0, 0, width, width);
g.dispose();
return new ImageIcon(img);
}

public int getValue() {
return value;
}

public Color getColor() {
return color;
}

public Icon getIcon() {
return icon;
}

public static Ground getGround(int value) {
for (Ground ground : Ground.values()) {
if (ground.getValue() == value) {
return ground;
}
}
return null;
}

}

关于java - 基于带整数的文件在 Canvas 上平铺绘图,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17916057/

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