61 lines
1.8 KiB
Lua
61 lines
1.8 KiB
Lua
aura_env.grad = function(c)
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--c expected as [0, 1]
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if c > 0.5 then
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c = 1 - (2 * (c - 0.5))
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return c, 1, 0, 1
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else
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c = c * 2
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return 1, c, 0, 1
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end
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end
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local function hexgrad(val, min, max)
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local function tohex(input)
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local output = string.format("%x", input * 255)
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return output
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end
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local function grad(c, min, max)
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c = (((max - c) / (max - min)) * 1)
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if c > 0.5 then
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c = 1 - (2 * (c - 0.5))
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return c, 1, 0, 1
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else
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c = c * 2
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return 1, c, 0, 1
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end
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end
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local color1, color2, color3, color4 = 0, 0, 0, 0
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color1, color2, color3, color4 = grad(val, min, max)
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color1, color2, color3, color4 = tohex(color1), tohex(color2), tohex(color3), tohex(color4)
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color1, color2, color3, color4 = tostring(color1), tostring(color2), tostring(color3), tostring(color4)
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if string.len(color1) == 1 then color1 = "0" .. color1 end
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if string.len(color2) == 1 then color2 = "0" .. color2 end
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if string.len(color3) == 1 then color3 = "0" .. color3 end
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if string.len(color4) == 1 then color4 = "0" .. color4 end
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local color = "\124c" .. color4 .. color1 .. color2 .. color3
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return color
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end
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local function RGBtoHex(rgb)
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local hexadecimal = 'FF'
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for key, value in pairs(rgb) do
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local hex = ''
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while(value > 0)do
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local index = math.fmod(value, 16) + 1
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value = math.floor(value / 16)
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hex = string.sub('0123456789ABCDEF', index, index) .. hex
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end
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if(string.len(hex) == 0)then
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hex = '00'
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elseif(string.len(hex) == 1)then
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hex = '0' .. hex
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end
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hexadecimal = hexadecimal .. hex
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end
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return hexadecimal
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end
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