Added forestgen.js example editscript.

contrib/editscripts/forestgen.js

@@ -0,0 +1,98 @@
+// $Id$
+/*
+ * Rudimentary ugly pine tree forest generator
+ * Copyright (c) 2010 sk89q <http://www.sk89q.com>
+ * Licensed under the terms of GNU General Public License v3
+*/
+
+/*
+
+    Usage:
+        /editscript forestgen
+        /editscript forestgen 20
+    
+    The first and only argument is the size of the square forest to
+    create as the distance away from your current position. Default 30 if
+    unspecified.
+
+*/
+
+var size = args.length > 0 ? Math.max(2, parseInt(args[0])) : 30;
+var affected = 0;
+
+function chanceBlock(x, y, z, t, c) {
+    if (Math.random() <= c) {
+        minecraft.setBlock(x, y, z, t);
+    }
+}
+
+function makeTree(x, y, z) {
+    var trunkHeight = Math.floor(Math.random() * 2) + 3;
+    var height = Math.floor(Math.random() * 5) + 8;
+    
+    // Create trunk
+    for (i = 0; i < trunkHeight; i++) {
+        minecraft.setBlock(x, y + i, z, 17);
+    }
+    
+    // Move up
+    y = y + trunkHeight;
+    
+    var pos2 = [-2, 2];
+    
+    // Create tree + leaves
+    for (i = 0; i < height; i++) {
+        minecraft.setBlock(x, y + i, z, 17);
+        
+        // Less leaves at these levels
+        var chance = (i == 0 || i == height - 1) ? 0.6 : 1
+        
+        // Inner leaves
+        chanceBlock(x - 1, y + i, z, 18, chance);
+        chanceBlock(x + 1, y + i, z, 18, chance);
+        chanceBlock(x, y + i, z - 1, 18, chance);
+        chanceBlock(x, y + i, z + 1, 18, chance);
+        chanceBlock(x + 1, y + i, z + 1, 18, chance);
+        chanceBlock(x - 1, y + i, z + 1, 18, chance);
+        chanceBlock(x + 1, y + i, z - 1, 18, chance);
+        chanceBlock(x - 1, y + i, z - 1, 18, chance);
+        
+        if (!(i == 0 || i == height - 1)) {
+            for (var j = -2; j <= 2; j++) {
+                chanceBlock(x - 2, y + i, z + j, 18, 0.6);
+            }
+            for (var j = -2; j <= 2; j++) {
+                chanceBlock(x + 2, y + i, z + j, 18, 0.6);
+            }
+            for (var j = -2; j <= 2; j++) {
+                chanceBlock(x + j, y + i, z - 2, 18, 0.6);
+            }
+            for (var j = -2; j <= 2; j++) {
+                chanceBlock(x + j, y + i, z + 2, 18, 0.6);
+            }
+        }
+    }
+}
+
+for (var x = player.blockX - size; x <= player.blockX + size; x++) {
+    for (var z = player.blockZ - size; z <= player.blockZ + size; z++) {
+        // Don't want to be in the ground
+        if (minecraft.getBlock(x, player.blockY, z) != 0) { continue; }
+        // The gods don't want a tree here
+        if (Math.random() < 0.95) { continue; }
+        
+        for (var y = player.blockY; y >= player.blockY - 10; y--) {
+            // Check if we hit the ground
+            var t = minecraft.getBlock(x, y, z);
+            if (t == 2 || t == 3) {
+                makeTree(x, y + 1, z);
+                affected++;
+                break;
+            } else if (t != 0) { // Trees won't grow on this!
+                break;
+            }
+        }
+    }
+}
+
+context.print(affected + " created tree(s)");