Sponge now removes water and obeys new 'sponge-radius' configuration variable.

CHANGELOG.txt

@@ -1,4 +1,9 @@
 1.2
+- Sponge updated to remove water when the sponge block is set. Sponge radius
+    can now be controlled using the 'sponge-radius' parameter and the
+    default is now set to simulate Classic.
+- Updated for a newer build of "b126," meaning that lava spread control
+    now works well!
 - A new summary of the status of some core protections is now printed
     on start. Disable this with 'summary-on-start'.
 - Blacklist system has been overhauled. Check README.txt for changed

README.txt

@@ -43,10 +43,13 @@ WorldGuard on your server. You can either restart your server or use
     spread (preventing waterfalls from becoming tsunamis).
 
 - simulate-sponge (def. false)
-    Toggle simulation of the sponge. The sponge only prevents water
-    from spreading. It will not take away existing water. Simulation of
-    the sponge requires iterating over a 9x9x9 cuboid around the water
-    block and the resource impact of this has not been quantified.
+    Toggle simulation of the sponge from Classic. It blocks water from
+    flowing near the sponge.
+
+- sponge-radius (def. 3)
+    The radius of the sponge's effect. The default is that of Classic,
+    creating a 5x5x5 cuboid free of water. Increasing the number will
+    increase server load exponentially, although 3-5 has fairly low impact.
 
 - enforce-single-session (def. true)
     Enforce single sessions. If the player is already found to be on

src/WorldGuardListener.java

@@ -70,6 +70,7 @@ public class WorldGuardListener extends PluginListener {
     private boolean preventLavaFire;
     private boolean disableAllFire;
     private boolean simulateSponge;
+    private int spongeRadius;
     private boolean blockLagFix;
     private Set<Integer> fireNoSpreadBlocks;
     private Set<Integer> allowedLavaSpreadOver;
@@ -135,6 +136,7 @@ public void loadConfiguration() {
         allowedLavaSpreadOver = toBlockIDSet(properties.getString("allowed-lava-spread-blocks", ""));
         classicWater = properties.getBoolean("classic-water", false);
         simulateSponge = properties.getBoolean("simulate-sponge", false);
+        spongeRadius = Math.max(1, properties.getInt("sponge-radius", 3)) - 1;
         blockLagFix = properties.getBoolean("block-lag-fix", false);
 
         // Console log configuration
@@ -304,6 +306,25 @@ public void run() {
             }
         }
 
+        if (simulateSponge && blockPlaced.getType() == 19) {
+            int ox = blockPlaced.getX();
+            int oy = blockPlaced.getY();
+            int oz = blockPlaced.getZ();
+
+            Server server = etc.getServer();
+
+            for (int cx = -spongeRadius; cx <= spongeRadius; cx++) {
+                for (int cy = -spongeRadius; cy <= spongeRadius; cy++) {
+                    for (int cz = -spongeRadius; cz <= spongeRadius; cz++) {
+                        int id = server.getBlockIdAt(ox + cx, oy + cy, oz + cz);
+                        if (id == 8 || id == 9) {
+                            server.setBlockAt(0, ox + cx, oy + cy, oz + cz);
+                        }
+                    }
+                }
+            }
+        }
+        
         return false;
     }
 
@@ -582,15 +603,15 @@ public boolean onFlow(Block blockFrom, Block blockTo) {
         boolean isLava = blockFrom.getType() == 10 || blockFrom.getType() == 11;
 
         if (simulateSponge && isWater) {
-            int ox = blockFrom.getX();
-            int oy = blockFrom.getY() + 1;
-            int oz = blockFrom.getZ();
+            int ox = blockTo.getX();
+            int oy = blockTo.getY();
+            int oz = blockTo.getZ();
 
             Server server = etc.getServer();
 
-            for (int cx = -4; cx <= 4; cx++) {
-                for (int cy = -4; cy <= 4; cy++) {
-                    for (int cz = -4; cz <= 4; cz++) {
+            for (int cx = -spongeRadius; cx <= spongeRadius; cx++) {
+                for (int cy = -spongeRadius; cy <= spongeRadius; cy++) {
+                    for (int cz = -spongeRadius; cz <= spongeRadius; cz++) {
                         if (server.getBlockIdAt(ox + cx, oy + cy, oz + cz) == 19) {
                             return true;
                         }