Java 2d游戏平铺地图剪辑？

Question

Well I've created a simple tile map loading, from .txt file & then drawing.

25
15
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0
0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0
0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

So if the current tile is 1, it will be a green block.

Now the game window looks like this (ignore yellow dots at top):

_{(source: gyazo.com )}

Okay everything is fine and great, but now can you see the red box? that's the character, and when it walks, I don't want it to go over the gates (any green block).

How can I do that?

My attempt:

private void makeClips() {
    int[][] tiledMap = this.map.getMap();
    for (int i = 0; i < this.map.getHeight(); i++) {
        for (int j = 0; j < this.map.getWidth(); j++) {  
            if (tiledMap[i][j] == 1) {
                clips.add(new Clip(j * 30, i * 30, 0, 0));
                System.out.println("Added clip: " + j + " " + i + " " + (j + 30) + " " + (i + 30));
            }
        }
    }
}

That should create an array of clips, so we can check if player's next walk equals to the clips coordinates, but I've had problems with setting the clip x, y like what will it's position be.

The 30 is the tile size, so each block will be 30 width 30 height sized.

And then in the walking method i've done this:

    for (Clip clip : clips) {
        if (myPlayer.getX() + x >= clip.getFirstX() && myPlayer.getX() + x <= clip.getSecX() 
                && myPlayer.getY() + y >= clip.getFirstY() && myPlayer.getY() + y <= clip.getSecY()) {
            System.out.println("Bad");
            return;
        }   
    }   

But I don't know, this is 100% incorrect, mostly the coordinate calculating part.

What would you do in this case?

This is the drawing part for map:

private void renderMap(Graphics2D g) {
    int[][] tiledMap = this.map.getMap();
    for (int i = 0; i < this.map.getHeight(); i++) {
        for (int j = 0; j < this.map.getWidth(); j++) {
            int currentRow = tiledMap[i][j];

            if (currentRow == 1) {
                g.setColor(Color.green);
            }
            if (currentRow == 0) {
                g.setColor(Color.black);
            }           
            g.fillRect(0 + j * map.getTileSize(), 0 + i * map.getTileSize(),
                    map.getTileSize(), map.getTileSize());

            g.setColor(Color.yellow);
            for (Clip clip : clips) {
                g.fillRect(clip.getFirstX(), clip.getFirstY(), 2, 2);

            }
        }           
    }
}

What can I do?

Answer 1

Why not do a check every time you move your player on the tile you want to move him onto.

Lets assume the player is at (0,0) on this small map.

0 0 1

0 0 0

0 0 0

We will try and move him to the right twice. The first time will work as at the position (1,0) the tile is equal to 0. The second time we try this the tile at (2,0) will return 1 and the player won't move.

if (tiledMap[player.getX() + 1)[player.getY()] == 1) {
//do nothing
} else {
//move player
}