world made of chunks with objects in them

1 files changed, 39 insertions, 0 deletions

diff --git a/world.lua b/world.lua
new file mode 100644
index 0000000..f4fcb70
--- /dev/null
+++ b/world.lua
@@ -0,0 +1,39 @@
+local world = {}
+
+local chunk_size = 1024
+
+world.chunks = {}
+setmetatable(world.chunks, {
+	__index = function(_, bee)
+		if rawget(world.chunks, bee) == nil then
+			world.chunks[bee] = {}
+		end
+		return world.chunks[bee]
+	end,
+})
+world.objects = {}
+world.last_id = 0
+
+function world.chunk_pos(x, y)
+	return math.floor(x / chunk_size), math.floor(y / chunk_size)
+end
+
+function world.world_pos(x, y)
+	return x * chunk_size, y * chunk_size
+end
+
+function world.chunk(x, y)
+	local cx, cy = world.chunk_pos(x, y)
+	if not world.chunks[cx][cy] then
+		-- load chunk from disk if the
+		world.chunks[cx][cy] = setmetatable(
+			{pos = {cx, cy}, objects = {}}, chunk)
+	end
+	return world.chunks[cx][cy]
+end
+
+function world.get_object(id)
+end
+
+world.__index = world
+return world