changed "go" methods in world and quadtree to something more descriptive

overviewer.py

@@ -365,7 +365,9 @@ dir but you forgot to put quotes around the directory, since it contains spaces.
         logging.error("To change north-direction of an existing render, use --forcerender")
         sys.exit(1)
     
-    w.go(options.procs)
+    # A couple other things we need to figure out about the world:
+    w.determine_bounds()
+    w.find_true_spawn()
 
     logging.info("Rending the following tilesets: %s", ",".join(options.rendermode))
 
@@ -394,9 +396,9 @@ dir but you forgot to put quotes around the directory, since it contains spaces.
             qtree = quadtree.QuadtreeGen(w, destdir, rendermode=rendermode, **qtree_args)
         q.append(qtree)
     
-    # do quadtree-level preprocessing
+    # Make sure the quadtrees are the correct depth
     for qtree in q:
-        qtree.go(options.procs)
+        qtree.check_depth()
 
     # create the distributed render
     r = rendernode.RenderNode(q, options)

overviewer_core/quadtree.py

@@ -196,8 +196,11 @@ class QuadtreeGen(object):
             except OSError, e:
                 pass # doesn't exist maybe?
 
-    def go(self, procs):
-        """Processing before tile rendering"""
+    def check_depth(self):
+        """Ensure the current quadtree is the correct depth. If it's not,
+        employ some simple re-arranging of tiles to save on computation.
+        
+        """
 
         curdepth = self._get_cur_depth()
         if curdepth != -1:

overviewer_core/world.py

@@ -298,10 +298,11 @@ class World(object):
                 msg="Spawn", type="spawn", chunk=(chunkX, chunkY)))
         self.spawn = (disp_spawnX, spawnY, disp_spawnZ)
 
-    def go(self, procs):
+    def determine_bounds(self):
         """Scan the world directory, to fill in
-        self.{min,max}{col,row} for use later in quadtree.py. This
-        also does other world-level processing."""
+        self.{min,max}{col,row} for use later in quadtree.py.
+        
+        """
         
         logging.info("Scanning chunks")
         # find the dimensions of the map, in region files
@@ -340,8 +341,6 @@ class World(object):
         self.minrow = minrow
         self.maxrow = maxrow
 
-        self.find_true_spawn()
-
     def _get_north_rotations(self):
         if self.north_direction == 'upper-left':
             return 1