mirror of
https://github.com/Dadido3/noita-mapcap.git
synced 2024-10-16 08:17:32 +00:00
David Vogel
8cf46232de
- Add full map capture mode - Show error on screen if screencapturing failed - Add additional frame delay for jumps larger than the grid size - Show progress for map capture mode - Tweak streaming chunk target - Update README.md
49 lines
873 B
Lua
49 lines
873 B
Lua
-- Copyright (c) 2019 David Vogel
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--
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-- This software is released under the MIT License.
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-- https://opensource.org/licenses/MIT
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local function hilbertRotate(n, x, y, rx, ry)
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if not ry then
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if rx then
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x = n - 1 - x
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y = n - 1 - y
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end
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x, y = y, x
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end
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return x, y
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end
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-- Maps a variable t to a hilbert curve with the side length of 2^potSize (Power of two size)
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function mapHilbert(t, potSize)
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local size = math.pow(2, potSize)
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local x, y = 0, 0
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if t < 0 or t >= size * size then
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error("Variable t is outside of the range")
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end
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for i = 0, potSize - 1, 1 do
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local iPOT = math.pow(2, i)
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local rx = bit.band(t, 2) == 2
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local ry = bit.band(t, 1) == 1
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if rx then
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ry = not ry
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end
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x, y = hilbertRotate(iPOT, x, y, rx, ry)
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if rx then
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x = x + iPOT
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end
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if ry then
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y = y + iPOT
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end
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t = math.floor(t / 4)
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end
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return x, y
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end
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