mtcontrib/mapgen_rivers
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Load data on request instead of loading everything at first.

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Data is cached in memory in case it is reused.
Offset values have a callback that converts them to the range ±0.5
This commit is contained in:
Gaël C
2021-06-26 11:50:52 +02:00
parent 636773487a
commit 7e39189368
2 changed files with 61 additions and 16 deletions
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35
polygons.lua
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@ -14,35 +14,40 @@ mapgen_rivers.grid = {}
local X = 1000
local Z = 1000
local function offset_converter(o)
return (o + 0.5) * (1/256)
end
-- Try to read file 'size'
local sfile = io.open(world_data_path..'size', 'r')
if sfile then
X, Z = tonumber(sfile:read('*l')), tonumber(sfile:read('*l'))
sfile:close()
minetest.register_on_mods_loaded(function()
local grid = mapgen_rivers.grid
grid.dem = mapgen_rivers.load_map('dem', 2, true, X*Z)
grid.lakes = mapgen_rivers.load_map('lakes', 2, true, X*Z)
grid.dirs = mapgen_rivers.load_map('dirs', 1, false, X*Z)
grid.rivers = mapgen_rivers.load_map('rivers', 4, false, X*Z)
grid.dem = mapgen_rivers.interactive_loader('dem', 2, true, X*Z)
grid.lakes = mapgen_rivers.interactive_loader('lakes', 2, true, X*Z)
grid.dirs = mapgen_rivers.interactive_loader('dirs', 1, false, X*Z)
grid.rivers = mapgen_rivers.interactive_loader('rivers', 4, false, X*Z)
grid.offset_x = mapgen_rivers.load_map('offset_x', 1, true, X*Z)
grid.offset_y = mapgen_rivers.load_map('offset_y', 1, true, X*Z)
grid.offset_x = mapgen_rivers.interactive_loader('offset_x', 1, true, X*Z, offset_converter)
grid.offset_y = mapgen_rivers.interactive_loader('offset_y', 1, true, X*Z, offset_converter)
end)
else
-- Generate a map!!
local pregenerate = dofile(mapgen_rivers.modpath .. '/pregenerate.lua')
minetest.register_on_mods_loaded(pregenerate)
minetest.register_on_mods_loaded(function()
pregenerate()
local offset_x = mapgen_rivers.grid.offset_x
local offset_y = mapgen_rivers.grid.offset_y
for i=1, X*Z do
offset_x[i] = offset_converter(offset_x[i])
offset_y[i] = offset_converter(offset_y[i])
end
end)
end
minetest.register_on_mods_loaded(function()
local offset_x, offset_y = mapgen_rivers.grid.offset_x, mapgen_rivers.grid.offset_y
for i=1, #offset_x do
offset_x[i] = (offset_x[i]+0.5) * (1/256)
offset_y[i] = (offset_y[i]+0.5) * (1/256)
end
end)
mapgen_rivers.grid.size = {x=X, y=Z}
local function index(x, z)