diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/coords.lua | 15 | ||||
| -rw-r--r-- | common/map.lua | 16 |
2 files changed, 31 insertions, 0 deletions
diff --git a/common/coords.lua b/common/coords.lua index 111429a..49c2bf2 100644 --- a/common/coords.lua +++ b/common/coords.lua @@ -136,6 +136,21 @@ function ChunkPos.extents(self) local brq,brr = (self.u+1)*CHUNK_SIZE -1, (self.v+1)*CHUNK_SIZE -1 return Hex:make(tlq,tlr), Hex:make(brq,brr) end +function ChunkPos.neighborhood(self) + -- return all chunkposes within the 3x3 square centered on self, including self + local out = {} + for du=-1,1 do + for dv = -1,1 do + table.insert(out,ChunkPos:make(du,dv) + self) + end + end + return out +end +function ChunkPos.orth_dist(self,other) + local du = math.abs(self.u-other.u) + local dv = math.abs(self.v-other.v) + return math.max(du,dv) +end function ChunkPos.filename(self) -- filename of chunk with that cp return "world/c_"..self.u.."_"..self.v..".dat" 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} |