Added comments and made some small changes

In get_drop_pos(): improved comments, added variation to drop positions and made it handle unloaded blocks in a new way.

technic/tools/chainsaw.lua

@@ -55,9 +55,9 @@ if( minetest.get_modpath("moretrees") ~= nil ) then
         if chainsaw_leaves then
                 timber_nodenames["moretrees:apple_tree_leaves"]        = true
                 timber_nodenames["moretrees:oak_leaves"]               = true
-                timber_nodenames["moretrees:sequoia_leaves"]           = true
                 timber_nodenames["moretrees:fir_leaves"]               = true
                 timber_nodenames["moretrees:fir_leaves_bright"]        = true
+                timber_nodenames["moretrees:sequoia_leaves"]           = true
                 timber_nodenames["moretrees:birch_leaves"]             = true
                 timber_nodenames["moretrees:birch_leaves"]             = true
                 timber_nodenames["moretrees:palm_leaves"]              = true
@@ -203,20 +203,39 @@ local function recursive_dig(pos, remaining_charge, player)
         return remaining_charge
 end
 
+-- Function to randomize positions for new node drops
 local function get_drop_pos(pos)
-    local p, node
+    local drop_pos, node
+    
     repeat
-        p = {
+        -- Randomize position for a new drop
+        drop_pos = {
                 x = pos.x + math.random(-3, 3),
                 y = pos.y - 1,
                 z = pos.z + math.random(-3, 3)
         }
+        
+        -- Move the newly-randomized position upwards until there's
+        -- no node in it or an unloaded block is found
         repeat
-            p.y = p.y + 1
+            drop_pos.y = drop_pos.y + 1
-            node = minetest.get_node(p).name
+            node = minetest.get_node(drop_pos).name
-        until node == "air" or node == "ignore" -- Make sure drops wont appear inside ground
+            
-    until p.y < pos.y + 5 -- Make sure the drops dont end up on a high ledge or column
+            if node == "ignore" then
-    return p
+                -- On a rare chase where the block above the digging position is not
+                -- loaded yet, simply drop the nodes at the original digging position
+                return pos
+            end
+        until node == "air"
+        
+    -- Make sure the drops will not end up too high on a tall ledge or a column
+    until drop_pos.y < pos.y + 5
+    
+    -- Add some variation to the previously integer-only position
+    drop_pos.x = drop_pos.x + math.random() - .5
+    drop_pos.z = drop_pos.z + math.random() - .5
+    
+    return drop_pos
 end
 
 -- Saw down trees entry point
@@ -294,4 +313,3 @@ minetest.register_craft({
                 {'',                               '',                             'default:copper_ingot'},
         }
 })
-