Added support for random block placement with //set. Made //set faster.

src/com/sk89q/worldedit/patterns/RandomFillPattern.java

@@ -0,0 +1,85 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldedit.patterns;
+
+import java.util.Random;
+import java.util.List;
+import java.util.ArrayList;
+import com.sk89q.worldedit.*;
+import com.sk89q.worldedit.blocks.BaseBlock;
+
+/**
+ * Pattern proportionally fills.
+ *
+ * @author sk89q
+ */
+public class RandomFillPattern implements Pattern {
+    /**
+     * Random number generator.
+     */
+    private static final Random random = new Random();
+    /**
+     * Blocks and their proportions.
+     */
+    private List<BlockChance> blocks;
+
+    /**
+     * Construct the object.
+     *
+     * @param blockType
+     */
+    public RandomFillPattern(List<BlockChance> blocks) {
+        double max = 0;
+
+        for (BlockChance block : blocks) {
+            max += block.getChance();
+        }
+
+        List<BlockChance> finalBlocks = new ArrayList<BlockChance>();
+
+        double i = 0;
+
+        for (BlockChance block : blocks) {
+            double v = block.getChance() / max;
+            i += v;
+            finalBlocks.add(new BlockChance(block.getBlock(), i));
+        }
+
+        this.blocks = finalBlocks;
+    }
+
+    /**
+     * Get next block.
+     *
+     * @param pos
+     * @return
+     */
+    public BaseBlock next(Vector pos) {
+        double r = random.nextDouble();
+        
+        for (BlockChance block : blocks) {
+            if (r <= block.getChance()) {
+                return block.getBlock();
+            }
+        }
+
+        throw new RuntimeException("ProportionalFillPattern");
+    }
+}