From d55fa96e3e59274b3182a4bb7fce814e7edad1aa Mon Sep 17 00:00:00 2001
From: sk89q <the.sk89q@gmail.com>
Date: Sat, 8 Jan 2011 11:40:18 -0800
Subject: [PATCH] Added /thaw.

---
 src/com/sk89q/worldedit/EditSession.java      | 48 +++++++++++++++++++
 .../sk89q/worldedit/WorldEditController.java  | 11 +++++
 2 files changed, 59 insertions(+)

diff --git a/src/com/sk89q/worldedit/EditSession.java b/src/com/sk89q/worldedit/EditSession.java
index c081a1c6c..e20049ec5 100755
--- a/src/com/sk89q/worldedit/EditSession.java
+++ b/src/com/sk89q/worldedit/EditSession.java
@@ -1570,6 +1570,54 @@ public class EditSession {
         return affected;
     }
 
+    /**
+     * Thaw.
+     * 
+     * @param pos
+     * @param radius
+     * @return number of blocks affected
+     * @throws MaxChangedBlocksException
+     */
+    public int thaw(Vector pos, int radius)
+            throws MaxChangedBlocksException {
+        int affected = 0;
+        int radiusSq = (int)Math.pow(radius, 2);
+
+        int ox = pos.getBlockX();
+        int oy = pos.getBlockY();
+        int oz = pos.getBlockZ();
+
+        BaseBlock air = new BaseBlock(0);
+        BaseBlock water = new BaseBlock(BlockID.STATIONARY_WATER);
+
+        for (int x = ox - radius; x <= ox + radius; x++) {
+            for (int z = oz - radius; z <= oz + radius; z++) {
+                if ((new Vector(x, oy, z)).distanceSq(pos) > radiusSq) {
+                    continue;
+                }
+
+                for (int y = 127; y >= 1; y--) {
+                    Vector pt = new Vector(x, y, z);
+                    int id = getBlock(pt).getID();
+
+                    if (id == BlockID.ICE) { // Ice
+                        if (setBlock(pt, water)) {
+                            affected++;
+                        }
+                    } else if (id == BlockID.SNOW) {
+                        if (setBlock(pt, air)) {
+                            affected++;
+                        }
+                    } else if (id != 0) {
+                        break;
+                    }
+                }
+            }
+        }
+
+        return affected;
+    }
+
     /**
      * Make snow.
      * 
diff --git a/src/com/sk89q/worldedit/WorldEditController.java b/src/com/sk89q/worldedit/WorldEditController.java
index a0744a711..d650617c5 100644
--- a/src/com/sk89q/worldedit/WorldEditController.java
+++ b/src/com/sk89q/worldedit/WorldEditController.java
@@ -155,6 +155,7 @@ public class WorldEditController {
         commands.put("/forestgen", "<Size> <Density> - Make Notch tree forest");
         commands.put("/pinegen", "<Size> <Density> - Make an ugly pine tree forest");
         commands.put("/snow", "<Radius> - Simulate snow cover");
+        commands.put("/thaw", "<Radius> - Unthaw/remove snow");
         commands.put("/pumpkins", "<Size> - Make a pumpkin forest");
         commands.put("/unstuck", "Go up to the first free spot");
         commands.put("/ascend", "Go up one level");
@@ -1219,6 +1220,16 @@ public class WorldEditController {
 
             return true;
 
+        // Thaw
+        } else if (split[0].equalsIgnoreCase("/thaw")) {
+            checkArgs(split, 0, 1, split[0]);
+            int size = split.length > 1 ? Math.max(1, Integer.parseInt(split[1])) : 10;
+
+            int affected = editSession.thaw(player.getBlockIn(), size);
+            player.print(affected + " surfaces thawed.");
+
+            return true;
+
         // Make pumpkin patches
         } else if (split[0].equalsIgnoreCase("/pumpkins")) {
             checkArgs(split, 0, 1, split[0]);