From 22d767b3e10959cd1545b5b1986bfbc44ff41491 Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323@ubq323.website>
Date: Sun, 8 Jun 2025 13:21:15 +0100
Subject: lots of various things

---
 common.lua | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

(limited to 'common.lua')

diff --git a/common.lua b/common.lua
index 7e67daf..bd86c6e 100644
--- a/common.lua
+++ b/common.lua
@@ -1,17 +1,22 @@
 local class = require 'r.class'
+local pprint = require 'pprint'
+local Pos = require 'r.pos'
 
 local SIZE = 64
 local ChunkMap = class()
 function ChunkMap.make(cls) return setmetatable({d={}},cls) end
-local function key(pos) return pos.x .. ':' .. pos.y end
-function ChunkMap.add(self,pos,val) self.d[key(pos)] = val end
-function ChunkMap.remove(self,pos) self:add(pos,nil) end
-function ChunkMap.get(self,pos) return self.d[key(pos)] end
+function ChunkMap.add(self,pos,val) self.d[pos:key()] = val end
+function ChunkMap.remove(self,pos) self.d[pos:key()] = nil end
+function ChunkMap.get(self,pos) return self.d[pos:key()] end
 local function idx(pos) return 1+pos.x*SIZE+pos.y end
 function ChunkMap.tile(self,pos)
-	local cp = (pos/SIZE):floor() local ix = idx(pos-cp*SIZE)
-	return self:get(cp)[ix] end
+	local cp,mod = pos:divmod(SIZE) local ch = self:get(cp)
+	return ch and ch.d[idx(mod)] end
+function ChunkMap.set_tile(self,pos,val)
+	local cp,mod = pos:divmod(SIZE) local ch = self:get(cp)
+	if ch then ch.d[idx(mod)] = val end end
 
 return {
 	ChunkMap = ChunkMap,
+	SIZE = SIZE,
 }
-- 
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