Added no-physics-gravel, no-physics-sand, and allow-portal-anywhere.

README.txt

@@ -54,6 +54,15 @@ WorldGuard on your server. You can either restart your server or use
     creating a 5x5x5 cuboid free of water. Increasing the number will
     increase server load exponentially, although 3-5 has fairly low impact.
 
+- no-physics-gravel (def. false)
+    Prevents gravel from falling due to gravity.
+
+- no-physics-sand (def. false)
+    Prevents sand from falling due to gravity.
+
+- allow-portal-anywhere (def. false)
+    Allows you to place portal blocks anywhere.
+
 - enforce-single-session (def. true)
     Enforce single sessions. If the player is already found to be on
     the server when s/he logs in, the other player will be kicked with

src/WorldGuard.java

@@ -85,6 +85,8 @@ public void initialize() {
                 PluginListener.Priority.HIGH);
         loader.addListener(PluginLoader.Hook.INVENTORY_CHANGE, listener, this,
                 PluginListener.Priority.HIGH);
+        loader.addListener(PluginLoader.Hook.BLOCK_PHYSICS, listener, this,
+                PluginListener.Priority.MEDIUM);
     }
 
     /**

src/WorldGuardListener.java

@@ -78,6 +78,9 @@ public class WorldGuardListener extends PluginListener {
     private Set<Integer> allowedLavaSpreadOver;
     private Set<Integer> itemDropBlacklist;
     private boolean classicWater;
+    private boolean noPhysicsGravel;
+    private boolean noPhysicsSand;
+    private boolean allowPortalAnywhere;
     private Blacklist blacklist;
 
     /**
@@ -141,6 +144,9 @@ public void loadConfiguration() {
         spongeRadius = Math.max(1, properties.getInt("sponge-radius", 3)) - 1;
         blockLagFix = properties.getBoolean("block-lag-fix", false);
         itemDurability = properties.getBoolean("item-durability", true);
+        noPhysicsGravel = properties.getBoolean("no-physics-gravel", false);
+        noPhysicsSand = properties.getBoolean("no-physics-sand", false);
+        allowPortalAnywhere = properties.getBoolean("allow-portal-anywhere", false);
 
         // Console log configuration
         boolean logConsole = properties.getBoolean("log-console", true);
@@ -781,6 +787,34 @@ public boolean onFlow(Block blockFrom, Block blockTo) {
         return false;
     }
 
+    /**
+     * Called when the game is checking the physics for a certain block.
+     * This method is called frequently whenever a nearby block is changed,
+     * or if the block has just been placed.
+     * Currently the only supported blocks are sand, gravel and portals.
+     *
+     * @param block Block which requires special physics
+     * @param boolean true if this block has just been placed
+     * @return true if you do want to stop the default physics for this block
+     */
+    public boolean onBlockPhysics(Block block, boolean placed) {
+        int id = block.getType();
+
+        if (id == 13 && noPhysicsGravel) {
+            return true;
+        }
+
+        if (id == 12 && noPhysicsSand) {
+            return true;
+        }
+
+        if (id == 90 && allowPortalAnywhere) {
+            return true;
+        }
+        
+    	return false;
+    }
+
     /**
      * Called on player disconnect
      *