Partial refactor.

src/engine/util/MapLoader.java

@@ -5,6 +5,7 @@
 package engine.util;
 
 import engine.InterestManagement.RealmMap;
+import engine.InterestManagement.Terrain;
 import engine.gameManager.ConfigManager;
 import engine.server.MBServerStatics;
 import org.pmw.tinylog.Logger;
@@ -14,6 +15,10 @@ import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.stream.Stream;
 
 public enum MapLoader {
 
@@ -87,4 +92,47 @@ public enum MapLoader {
         g.dispose();
         return dimg;
     }
+
+    public static void loadAlHeightMaps() {
+
+        // Load pixel data for heightmaps
+
+        try (Stream<Path> filePathStream = Files.walk(Paths.get(ConfigManager.DEFAULT_DATA_DIR + "heightmaps/TARGA/"))) {
+            filePathStream.forEach(filePath -> {
+
+                if (Files.isRegularFile(filePath)) {
+                    File imageFile = filePath.toFile();
+
+                    try {
+                        BufferedImage heightmapImage = ImageIO.read(imageFile);
+
+                        // Generate pixel data for this heightmap.  RPG channels are all the same
+                        // in this greyscale TGA heightmap.  We will choose red.
+
+                        short[][] colorData = new short[heightmapImage.getWidth()][heightmapImage.getHeight()];
+
+                        for (int y = 0; y < heightmapImage.getHeight(); y++)
+                            for (int x = 0; x < heightmapImage.getWidth(); x++) {
+
+                                Color color = new Color(heightmapImage.getRGB(x, y));
+                                colorData[x][y] = (short) color.getRed();
+                            }
+
+                        // Insert color data into lookup table
+
+                        int heightMapID = Integer.parseInt(imageFile.getName().substring(0, imageFile.getName().lastIndexOf(".")));
+                        Terrain._heightmap_pixel_cache.put(heightMapID, colorData);
+
+                    } catch (IOException e) {
+                        Logger.error(e);
+                    }
+
+                }
+            });  // Try with resources block
+
+        } catch (IOException e) {
+            Logger.error(e);
+        }
+
+    }
 }