147 lines
3.2 KiB
Lua
147 lines
3.2 KiB
Lua
COOLDOWN_FACTOR = 0.9998
|
||
MAX_ENERGY_PROPAGATION = 0.5
|
||
EXPONENT=1.3
|
||
W_EXPONENT=1.8
|
||
OVERDRIVE=1
|
||
FADE_FACTOR = 0.94
|
||
AVG_LEDS_ACTIVATED = 0.05
|
||
|
||
num_modules = 1
|
||
num_strips = 1
|
||
|
||
-- maximum energy values for each band
|
||
maxRedEnergy = 1
|
||
maxGreenEnergy = 1
|
||
maxBlueEnergy = 1
|
||
maxWhiteEnergy = 1
|
||
|
||
-- array storing the flame’s energy for each pixel
|
||
fireRedEnergy = {}
|
||
fireGreenEnergy = {}
|
||
fireBlueEnergy = {}
|
||
fireWhiteEnergy = {}
|
||
|
||
-- output color buffers
|
||
red = {}
|
||
green = {}
|
||
blue = {}
|
||
white = {}
|
||
|
||
function limit(val)
|
||
if val > 1 then
|
||
return 1
|
||
elseif val < 0 then
|
||
return 0
|
||
else
|
||
return val
|
||
end
|
||
end
|
||
|
||
function fade2black(energyArray)
|
||
for s = 1,num_strips do
|
||
for m = 1,num_modules do
|
||
i = idx(s, m)
|
||
|
||
energyArray[i] = energyArray[i] * FADE_FACTOR
|
||
end
|
||
end
|
||
end
|
||
|
||
function distributeEnergy(newEnergy, energyArray)
|
||
remainingEnergy = AVG_LEDS_ACTIVATED * newEnergy * num_modules * num_strips
|
||
|
||
while remainingEnergy > 0 do
|
||
rndEnergy = math.random() * newEnergy * 5
|
||
rndStrip = math.floor(math.random() * num_strips)
|
||
rndModule = math.floor(math.random() * num_modules)
|
||
|
||
if rndEnergy > remainingEnergy then
|
||
rndEnergy = remainingEnergy
|
||
remainingEnergy = 0
|
||
else
|
||
remainingEnergy = remainingEnergy - rndEnergy
|
||
end
|
||
|
||
i = idx(rndStrip+1, rndModule+1)
|
||
energyArray[i] = energyArray[i] + rndEnergy
|
||
end
|
||
end
|
||
|
||
function periodic()
|
||
local redEnergy = get_energy_in_band(0, 400);
|
||
local greenEnergy = get_energy_in_band(400, 4000);
|
||
local blueEnergy = get_energy_in_band(4000, 12000);
|
||
local whiteEnergy = get_energy_in_band(12000, 22000);
|
||
|
||
maxRedEnergy = maxRedEnergy * COOLDOWN_FACTOR
|
||
if redEnergy > maxRedEnergy then
|
||
maxRedEnergy = redEnergy
|
||
end
|
||
|
||
maxGreenEnergy = maxGreenEnergy * COOLDOWN_FACTOR
|
||
if greenEnergy > maxGreenEnergy then
|
||
maxGreenEnergy = greenEnergy
|
||
end
|
||
|
||
maxBlueEnergy = maxBlueEnergy * COOLDOWN_FACTOR
|
||
if blueEnergy > maxBlueEnergy then
|
||
maxBlueEnergy = blueEnergy
|
||
end
|
||
|
||
maxWhiteEnergy = maxWhiteEnergy * COOLDOWN_FACTOR
|
||
if whiteEnergy > maxWhiteEnergy then
|
||
maxWhiteEnergy = whiteEnergy
|
||
end
|
||
|
||
fade2black(fireRedEnergy)
|
||
fade2black(fireGreenEnergy)
|
||
fade2black(fireBlueEnergy)
|
||
fade2black(fireWhiteEnergy)
|
||
|
||
distributeEnergy(redEnergy / maxRedEnergy, fireRedEnergy)
|
||
distributeEnergy(greenEnergy / maxGreenEnergy, fireGreenEnergy)
|
||
distributeEnergy(blueEnergy / maxBlueEnergy, fireBlueEnergy)
|
||
distributeEnergy(whiteEnergy / maxWhiteEnergy, fireWhiteEnergy)
|
||
|
||
-- make colors more exciting + remove the first (flickering) mass
|
||
-- TODO: update
|
||
for m = 1,num_modules do
|
||
for s = 1,num_strips do
|
||
i = idx(s, m)
|
||
|
||
rval = limit(OVERDRIVE * fireRedEnergy[i]^EXPONENT)
|
||
gval = limit(OVERDRIVE * fireGreenEnergy[i]^EXPONENT)
|
||
bval = limit(OVERDRIVE * fireBlueEnergy[i]^EXPONENT)
|
||
wval = limit(OVERDRIVE * fireWhiteEnergy[i]^W_EXPONENT)
|
||
|
||
red[i] = rval
|
||
green[i] = gval
|
||
blue[i] = bval
|
||
white[i] = wval
|
||
end
|
||
end
|
||
|
||
-- return the 4 color arrays
|
||
return red, green, blue, white
|
||
end
|
||
|
||
function init(nstrip, nmod, cmod)
|
||
num_strips = nstrip
|
||
num_modules = nmod
|
||
|
||
for i = 1,(nmod*nstrip) do
|
||
red[i] = 0
|
||
green[i] = 0
|
||
blue[i] = 0
|
||
white[i] = 0
|
||
|
||
fireRedEnergy[i] = 0
|
||
fireGreenEnergy[i] = 0
|
||
fireBlueEnergy[i] = 0
|
||
fireWhiteEnergy[i] = 0
|
||
end
|
||
|
||
-- don't use fading
|
||
return 0
|
||
end
|