From 514a78272e72e3813f25db2349b29d662945b9a0 Mon Sep 17 00:00:00 2001
From: sk89q <the.sk89q@gmail.com>
Date: Tue, 12 Oct 2010 22:06:46 -0700
Subject: [PATCH] Added /ascend and /descend.

---
 src/WorldEdit.java       | 22 +++++++++++
 src/WorldEditPlayer.java | 84 +++++++++++++++++++++++++++++++++++++++-
 2 files changed, 105 insertions(+), 1 deletion(-)

diff --git a/src/WorldEdit.java b/src/WorldEdit.java
index 0fabd0353..63fb109d8 100644
--- a/src/WorldEdit.java
+++ b/src/WorldEdit.java
@@ -94,6 +94,8 @@ public class WorldEdit {
         commands.put("/editexpand", "<Dir> [Num] - Expands the selection");
         commands.put("/editcontract", "<Dir> [Num] - Contracts the selection");
         commands.put("/unstuck", "Go up to the first free spot");
+        commands.put("/ascend", "Go up one level");
+        commands.put("/descend", "Go dowm one level");
     }
 
     /**
@@ -202,6 +204,26 @@ public class WorldEdit {
             player.findFreePosition();
             return true;
 
+        // Ascend a level
+        } else if(split[0].equalsIgnoreCase("/ascend")) {
+            checkArgs(split, 0, 0, split[0]);
+            if (player.ascendLevel()) {
+                player.print("Ascended a level.");
+            } else {
+                player.printError("No free spot above you found.");
+            }
+            return true;
+
+        // Descend a level
+        } else if(split[0].equalsIgnoreCase("/descend")) {
+            checkArgs(split, 0, 0, split[0]);
+            if (player.descendLevel()) {
+                player.print("Descended a level.");
+            } else {
+                player.printError("No free spot below you found.");
+            }
+            return true;
+
         // Set edit position #1
         } else if (split[0].equalsIgnoreCase("/editpos1")) {
             checkArgs(split, 0, 0, split[0]);
diff --git a/src/WorldEditPlayer.java b/src/WorldEditPlayer.java
index 45141d54b..11ffa6b81 100644
--- a/src/WorldEditPlayer.java
+++ b/src/WorldEditPlayer.java
@@ -133,7 +133,7 @@ public class WorldEditPlayer {
 
     /**
      * Move the player.
-     * 
+     *
      * @param pos
      * @param pitch
      * @param yaw
@@ -148,6 +148,21 @@ public class WorldEditPlayer {
         player.teleportTo(loc);
     }
 
+    /**
+     * Move the player.
+     *
+     * @param pos
+     */
+    public void setPosition(Vector pos) {
+        Location loc = new Location();
+        loc.x = pos.getX();
+        loc.y = pos.getY();
+        loc.z = pos.getZ();
+        loc.rotX = (float)getYaw();
+        loc.rotY = (float)getPitch();
+        player.teleportTo(loc);
+    }
+
     /**
      * Find a position for the player to stand that is not inside a block.
      * Blocks above the player will be iteratively tested until there is
@@ -186,6 +201,73 @@ public class WorldEditPlayer {
         }
     }
 
+    /**
+     * Go up one level to the next free space above.
+     *
+     * @return true if a spot was found
+     */
+    public boolean ascendLevel() {
+        int x = (int)Math.floor(player.getX());
+        int y = (int)Math.floor(player.getY());
+        int z = (int)Math.floor(player.getZ());
+
+        byte free = 0;
+        byte spots = 0;
+        boolean inFree = false;
+
+        while (y <= 129) {
+            if (etc.getServer().getBlockIdAt(x, y, z) == 0) {
+                free++;
+            } else {
+                free = 0;
+                inFree = false;
+            }
+
+            if (free == 2 && inFree == false) {
+                inFree = true;
+                spots++;
+                if (y >= 129 || spots == 2) {
+                    setPosition(new Vector(x + 0.5, y - 1, z + 0.5));
+                    return true;
+                }
+            }
+
+            y++;
+        }
+
+        return false;
+    }
+
+    /**
+     * Go up one level to the next free space above.
+     *
+     * @return true if a spot was found
+     */
+    public boolean descendLevel() {
+        int x = (int)Math.floor(player.getX());
+        int y = (int)Math.floor(player.getY()) - 1;
+        int z = (int)Math.floor(player.getZ());
+
+        byte free = 0;
+
+        while (y >= 0) {
+            if (etc.getServer().getBlockIdAt(x, y, z) == 0) {
+                free++;
+            } else {
+                free = 0;
+            }
+
+            if (free == 2) {
+                setPosition(new Vector(x + 0.5, y, z + 0.5));
+                return true;
+            }
+
+            y--;
+        }
+
+        return false;
+    }
+
     /**
      * Gives the player an item.
      *