JGame2D/src/de/miaurizius/jgame2d/tile/TileManager.java

package de.miaurizius.jgame2d.tile;

import de.miaurizius.jgame2d.core.Boot;
import de.miaurizius.jgame2d.core.GamePanel;
import de.miaurizius.jgame2d.core.Utility;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.logging.Level;

public class TileManager {

    GamePanel panel;
    public Tile[] tile;
    public int[][] mapTileNum;

    public TileManager(GamePanel panel) {
        this.panel = panel;
        tile = new Tile[50];
        mapTileNum = new int[panel.maxWorldCol][panel.maxWorldRow];
        getTileImage();
        loadMap("testmap2");
    }

    public void initializeTile(int i, String name, boolean col) {
        try {
            tile[i] = new Tile();
            tile[i].image = ImageIO.read(new FileInputStream("assets/tiles/" + name + ".png"));
            tile[i].collision = col;
        } catch(IOException e) {
            Boot.logger.log(Level.SEVERE, "Could not load tile", e);
        }
    }

    public void getTileImage() {
        // PLACEHOLDER
        initializeTile(0, "grass00", false);
        initializeTile(2, "grass00", false);
        initializeTile(3, "grass00", false);
        initializeTile(4, "grass00", false);
        initializeTile(5, "grass00", false);
        initializeTile(6, "grass00", false);
        initializeTile(7, "grass00", false);
        initializeTile(8, "grass00", false);
        initializeTile(9, "grass00", false);

        // GRASS
        initializeTile(10, "grass00", false);
        initializeTile(11, "grass01", false);

        // WATER
        initializeTile(12, "water00", true);
        initializeTile(13, "water01", true);
        initializeTile(14, "water02", true);
        initializeTile(15, "water03", true);
        initializeTile(16, "water04", true);
        initializeTile(17, "water05", true);
        initializeTile(18, "water06", true);
        initializeTile(19, "water07", true);
        initializeTile(20, "water08", true);
        initializeTile(21, "water09", true);
        initializeTile(22, "water10", true);
        initializeTile(23, "water11", true);
        initializeTile(24, "water12", true);
        initializeTile(25, "water13", true);

        // ROAD
        initializeTile(26, "road00", false);
        initializeTile(27, "road01", false);
        initializeTile(28, "road02", false);
        initializeTile(29, "road03", false);
        initializeTile(30, "road04", false);
        initializeTile(31, "road05", false);
        initializeTile(32, "road06", false);
        initializeTile(33, "road07", false);
        initializeTile(34, "road08", false);
        initializeTile(35, "road09", false);
        initializeTile(36, "road10", false);
        initializeTile(37, "road11", false);
        initializeTile(38, "road12", false);

        // WORLD
        initializeTile(39, "earth", false);
        initializeTile(40, "wall", true);
        initializeTile(41, "tree", true);


        BufferedImage scaledImage;
        for (Tile tile : tile) {
            if(tile == null) continue;
            tile.image = Utility.scaleImage(tile.image, panel.tileSize, panel.tileSize);
        }
    }

    public void loadMap(String map) {
        try {
            InputStream stream = new FileInputStream("assets/maps/"+map+".map");
            BufferedReader bReader = new BufferedReader(new InputStreamReader(stream));
            int col = 0;
            int row = 0;
            while(col < panel.maxWorldCol && row < panel.maxWorldRow) {
                String line = bReader.readLine();
                while(col < panel.maxWorldCol) {
                    String[] numbers = line.split(" ");
                    int num = Integer.parseInt(numbers[col]);
                    mapTileNum[col][row] = num;
                    col++;
                }
                if(col == panel.maxWorldCol) {
                    col = 0;
                    row++;
                }
            }
            bReader.close();
        } catch(Exception e) {
            Boot.logger.log(Level.SEVERE, "Could not load map", e);
        }
    }

    public void draw(Graphics2D graphics2D) {
        int worldCol = 0;
        int worldRow = 0;

        while(worldCol < panel.maxWorldCol && worldRow < panel.maxWorldRow) {
            int tileNum = mapTileNum[worldCol][worldRow];

            int worldX = worldCol * panel.tileSize;
            int worldY = worldRow * panel.tileSize;
            int screenX = worldX - panel.player.worldX + panel.player.screenX;
            int screenY = worldY - panel.player.worldY + panel.player.screenY;

            if(worldX + panel.tileSize > panel.player.worldX - panel.player.screenX &&
               worldX - panel.tileSize < panel.player.worldX + panel.player.screenX &&
               worldY + panel.tileSize > panel.player.worldY - panel.player.screenY &&
               worldY - panel.tileSize < panel.player.worldY + panel.player.screenY
            ) graphics2D.drawImage(tile[tileNum].image, screenX, screenY, null);

            worldCol++;

            if(worldCol == panel.maxWorldCol) {
                worldCol = 0;
                worldRow++;
            }
        }
    }

}