d
42 lines
1.1 KiB
Lua
42 lines
1.1 KiB
Lua
local raster = {util = {}}
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function raster.drawPixel(x, y, bg, fg)
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-- get original character for "merging"
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local char = gpu.get(x, y)[0]
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if bg ~= nil then gpu.setBackground(bg) end
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if fg ~= nil then gpu.setForeground(fg) end
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-- convert from braille to char code
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-- convert from
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-- 1 4 1 2
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-- 2 5 -> 3 4
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-- 3 6 5 6
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-- 7 8 7 8 using complicate bit thingery
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-- example would be 171 should be converted to 157
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-- or a more simple one: 16 to 4
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-- bitwise or
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-- unconvert
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-- print the thing
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char = string.byte(char)
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ocelot.log(char)
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char = formByte({getBit(char, 0), getBit(char, 2), getBit(char, 4), getBit(char, 1), getBit(char, 3), getBit(char, 5), getBit(char, 6), getBit(char, 7)})
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ocelot.log(char)
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end
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function raster.util.XY2Braille(x, y)
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return math.floor(x/2), math.floor(y/4)
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end
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function raster.util.Braille2XY(x, y)
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return math.floor(x*2), math.floor(y*4)
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end
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function raster.util.getBit(a, which)
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return 1 == ((a >> which) & 1);
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end
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function raster.util.formByte(a)
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local x = 0
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for i = 1, 8 do
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x = x+(a[i]<<i)
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end
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return x
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end
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return raster |