1 files changed, 100 insertions, 0 deletions
diff --git a/src/main/java/net/minecraft/server/WorldGenForest.java b/src/main/java/net/minecraft/server/WorldGenForest.java
new file mode 100644
index 00000000..6830fb93
--- /dev/null
+++ b/src/main/java/net/minecraft/server/WorldGenForest.java
@@ -0,0 +1,100 @@
+package net.minecraft.server;
+
+import java.util.Random;
+
+//CraftBukkit start
+import org.bukkit.BlockChangeDelegate;
+//CraftBukkit end
+
+public class WorldGenForest extends WorldGenerator {
+
+    public WorldGenForest() {}
+
+    public boolean a(World world, Random random, int i, int j, int k) {
+        // CraftBukkit start
+        // sk: The idea is to have (our) WorldServer implement
+        // BlockChangeDelegate and then we can implicitly cast World to
+        // WorldServer (a safe cast, AFAIK) and no code will be broken. This
+        // then allows plugins to catch manually-invoked generation events
+        return generate((BlockChangeDelegate)world, random, i, j, k);
+    }
+    
+    public boolean generate(BlockChangeDelegate world, Random random, int i, int j, int k) {
+        // CraftBukkit end
+        int l = random.nextInt(3) + 5;
+        boolean flag = true;
+
+        if (j >= 1 && j + l + 1 <= 128) {
+            int i1;
+            int j1;
+            int k1;
+            int l1;
+
+            for (i1 = j; i1 <= j + 1 + l; ++i1) {
+                byte b0 = 1;
+
+                if (i1 == j) {
+                    b0 = 0;
+                }
+
+                if (i1 >= j + 1 + l - 2) {
+                    b0 = 2;
+                }
+
+                for (j1 = i - b0; j1 <= i + b0 && flag; ++j1) {
+                    for (k1 = k - b0; k1 <= k + b0 && flag; ++k1) {
+                        if (i1 >= 0 && i1 < 128) {
+                            l1 = world.getTypeId(j1, i1, k1);
+                            if (l1 != 0 && l1 != Block.LEAVES.id) {
+                                flag = false;
+                            }
+                        } else {
+                            flag = false;
+                        }
+                    }
+                }
+            }
+
+            if (!flag) {
+                return false;
+            } else {
+                i1 = world.getTypeId(i, j - 1, k);
+                if ((i1 == Block.GRASS.id || i1 == Block.DIRT.id) && j < 128 - l - 1) {
+                    world.setTypeId(i, j - 1, k, Block.DIRT.id);
+
+                    int i2;
+
+                    for (i2 = j - 3 + l; i2 <= j + l; ++i2) {
+                        j1 = i2 - (j + l);
+                        k1 = 1 - j1 / 2;
+
+                        for (l1 = i - k1; l1 <= i + k1; ++l1) {
+                            int j2 = l1 - i;
+
+                            for (int k2 = k - k1; k2 <= k + k1; ++k2) {
+                                int l2 = k2 - k;
+
+                                if ((Math.abs(j2) != k1 || Math.abs(l2) != k1 || random.nextInt(2) != 0 && j1 != 0) && !Block.o[world.getTypeId(l1, i2, k2)]) {
+                                    world.setTypeIdAndData(l1, i2, k2, Block.LEAVES.id, 2);
+                                }
+                            }
+                        }
+                    }
+
+                    for (i2 = 0; i2 < l; ++i2) {
+                        j1 = world.getTypeId(i, j + i2, k);
+                        if (j1 == 0 || j1 == Block.LEAVES.id) {
+                            world.setTypeIdAndData(i, j + i2, k, Block.LOG.id, 2);
+                        }
+                    }
+
+                    return true;
+                } else {
+                    return false;
+                }
+            }
+        } else {
+            return false;
+        }
+    }
+}