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58 lines
1.4 KiB
58 lines
1.4 KiB
-- This script is a test of led override |
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local count = 0 |
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local num_leds = 16 |
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-- constrain a value between limits |
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function constrain(v, vmin, vmax) |
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if v < vmin then |
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v = vmin |
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end |
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if v > vmax then |
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v = vmax |
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end |
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return v |
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end |
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--[[ |
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Table of colors on a rainbow, red first |
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--]] |
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local rainbow = { |
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{ 255, 0, 0 }, |
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{ 255, 127, 0 }, |
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{ 255, 255, 0 }, |
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{ 0, 255, 0 }, |
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{ 0, 0, 255 }, |
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{ 75, 0, 130 }, |
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{ 143, 0, 255 }, |
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} |
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--[[ |
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Function to set a LED to a color on a classic rainbow spectrum, with v=0 giving red |
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--]] |
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function set_Rainbow(led, v) |
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local num_rows = #rainbow |
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local row = math.floor(constrain(v * (num_rows-1)+1, 1, num_rows-1)) |
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local v0 = (row-1) / (num_rows-1) |
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local v1 = row / (num_rows-1) |
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local p = (v - v0) / (v1 - v0) |
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r = math.floor(rainbow[row][1] + p * (rainbow[row+1][1] - rainbow[row][1])) |
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g = math.floor(rainbow[row][2] + p * (rainbow[row+1][2] - rainbow[row][2])) |
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b = math.floor(rainbow[row][3] + p * (rainbow[row+1][3] - rainbow[row][3])) |
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notify:handle_rgb_id(r, g, b, led) |
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end |
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function update() -- this is the loop which periodically runs |
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count = count + 1 |
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if count > 16 then |
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count = 0 |
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end |
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for led = 0, num_leds-1 do |
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local v = ((count+led)%16)/16 |
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set_Rainbow(led, v) |
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end |
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return update, 20 -- reschedules the loop in 15 seconds |
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end |
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return update() -- run immediately before starting to reschedule
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