32 lines
579 B
Lua
32 lines
579 B
Lua
local worldpath = minetest.get_worldpath() .. "/river_data/"
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local function load_map(filename, bytes, signed, size)
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local file = io.open(worldpath .. filename, 'rb')
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local data = file:read('*all')
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if #data < bytes*size then
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data = minetest.decompress(data)
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end
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local map = {}
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for i=1, size do
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local i0, i1 = (i-1)*bytes+1, i*bytes
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local elements = {data:byte(i0, i1)}
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local n = elements[1]
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if signed and n >= 128 then
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n = n - 256
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end
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for j=2, bytes do
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n = n*256 + elements[j]
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end
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map[i] = n
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end
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file:close()
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return map
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end
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return load_map
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