More optimization, add constants file for eventual descructible scenery.

mapgen.lua

@@ -2,8 +2,6 @@
 
 function init_mapgen()
    uid_seed = 2229 -- arbitrarily chosen number
-   -- block_size = 64
-   -- biome_size = 128
 
    -- Metadata for different biomes
    -- frequencies don't have to add up to 100, but they should by convention
@@ -36,7 +34,7 @@ function init_mapgen()
       local biome = biome_list[i]
 
       -- add the biome's name N times to the biome metadata 'hat'
-      for i=1,biome_data[biome]["biome_frequency"] do
+      for i=1,biome_data[biome].biome_frequency do
          add(biome_metadata, biome)
       end
 
@@ -47,7 +45,7 @@ end
 -- build the lookup table for a given biome, based on the biome_meta data for
 -- that string.
 function build_biome(biome_name, data)
-   local meta_frequencies = data["tile_frequencies"]
+   local meta_frequencies = data.tile_frequencies
    local tile_lookup = {}
 
    for i=1,#meta_frequencies do
@@ -57,7 +55,7 @@ function build_biome(biome_name, data)
       end
    end
 
-   data["tile_lookup"] = tile_lookup
+   data.tile_lookup = tile_lookup
 end
 
 -- generates a unique identifier for a position
@@ -90,7 +88,7 @@ function get_tile(pos_x, pos_y)
    local biome = biome_data[biome_name]
    local uid = generate_uid(pos_x, pos_y)
 
-   return biome["tile_lookup"][(uid % #biome["tile_lookup"]) + 1]
+   return biome.tile_lookup[(uid % #biome.tile_lookup) + 1]
 end
 
 -- generate the map and writes to the map area from 0 - block_size,