world made of chunks with objects in them

1 files changed, 30 insertions, 0 deletions

diff --git a/util.lua b/util.lua
new file mode 100644
index 0000000..a639ca2
--- /dev/null
+++ b/util.lua
@@ -0,0 +1,30 @@
+
+local M = {}
+
+function M.copy(t)
+	local c = {}
+	for k,v in pairs(t) do
+		c[k] = v
+	end
+	return c
+end
+
+function M.deepcopy(t)
+	local copied = {}
+	local function dc(t)
+		if not copied[t] then
+			local c = {}
+			copied[t] = c
+			for k,v in pairs(t) do
+				if type(v) == 'table' then
+					v = dc(v)
+				end
+				c[k] = v
+			end
+		end
+		return copied[t]
+	end
+	return dc(t)
+end
+
+return M