clientside chunk unloading when not near. also refactor coordinate things slightly

1 files changed, 16 insertions, 0 deletions

diff --git a/common/map.lua b/common/map.lua
index 8161f11..64d353c 100644
--- a/common/map.lua
+++ b/common/map.lua
@@ -10,6 +10,7 @@
 
 local class = require"common.class"
 local chunk = require"common.chunk"
+local coords = require"common.coords"
 local CHUNK_SIZE = require"common.constants".CHUNK_SIZE
 
 local Map = class()
@@ -66,5 +67,20 @@ function Map.set_at(self,hpos,tile)
 	if not ch then return nil end
 	ch:set_at(hoffs,tile)
 end
+function Map.iter_chunks(self)
+	-- iterates through all cp,chunk pairs
+	-- chunk might be false
+	-- not guaranteed to be in any particular order
+
+	return coroutine.wrap(function()
+		for u,t in pairs(self.chunks) do
+			for v,ch in pairs(t) do
+				-- if ch is false, won't have a .cp
+				local cp = coords.ChunkPos:make(u,v)
+				coroutine.yield(cp,ch)
+			end
+		end
+	end)
+end
 
 return {Map=Map}