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Diffstat (limited to 'common/coords.lua')
| -rw-r--r-- | common/coords.lua | 15 |
1 files changed, 15 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" |