code stable, colors look great, and fast
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Mikey Sklar
parent
130abb5fc9
commit
152980fe5e
1 changed files with 55 additions and 57 deletions
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@ -13,7 +13,6 @@ import neopixel
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import random
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import time
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from analogio import AnalogIn
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# pylint: disable=global-statement
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n_leds = 29 # number of LEDs per horn
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led_pin = board.D0 # which pin your pixels are connected to
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@ -77,26 +76,25 @@ while True:
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w = i = n = s = v = r = g = b = v1 = s1 = 0
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if count <= 0: # time for new animation
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count = 250 + random.randint(0,250) # effect run for 5-10 sec.
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if count <= 0: # time for new animation
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count = 250 + random.randint(0,250) # effect run for 5-10 sec.
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for w in range(3): # three waves (H,S,V)
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wave[w][wave_type] = random.randint(0,2) # square vs triangle
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wave[w][inc_frame] = nz_random() # frame increment
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wave[w][inc_pixel] = nz_random() # pixel increment
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for w in range(3): # three waves (H,S,V)
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wave[w][wave_type] = random.randint(0,2)# square vs triangle
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wave[w][inc_frame] = nz_random() # frame increment
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wave[w][inc_pixel] = nz_random() # pixel increment
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wave[w][value_pixel] = wave[w][value_frame]
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wave[wave_s][inc_pixel] *= 16 # make saturation & value
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wave[wave_v][inc_pixel] *= 16 # blinkier along strip
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wave[wave_s][inc_pixel] *= 16 # make saturation & value
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wave[wave_v][inc_pixel] *= 16 # blinkier along strip
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else: # continue animation
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else: # continue animation
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count -= 1
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for w in range(3):
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wave[w][value_frame] += wave[w][inc_frame]
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wave[w][value_pixel] = wave[w][value_frame]
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# Render current animation frame. COGNITIVE HAZARD: fixed point math.
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for i in range(n_leds): # for each LED along strip...
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# Coarse (8-bit) HSV-to-RGB conversion, hue first:
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n = (wave[wave_h][value_pixel] % 43) * 6 # angle within sextant
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@ -134,59 +132,59 @@ while True:
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g = 0
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b = 254 - n
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# Saturation = 1-256 to allow >>8 instead of /255
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s = wave[wave_s][value_pixel]
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# Saturation = 1-256 to allow >>8 instead of /255
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s = wave[wave_s][value_pixel]
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if wave[wave_s][wave_type]: # triangle wave?
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if s & 0x80: # downslope
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s = (s & 0x7F) << 1
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s1 = 256 - s
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else: # upslope
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s = s<<1
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s1 = 1 + s
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s = 255 - s
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else:
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if s & 0x80: # square wave
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s1 = 256 # 100% saturation
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s = 0
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else: # 0% saturation
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s1 = 1
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s = 255
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# Value (brightness) = 1-256 for similar reasons
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v = wave[wave_v][value_pixel]
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# value (brightness) = 1-256 for similar reasons
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if wave[wave_v][wave_type]: # triangle wave?
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if v & 0x80: # downslope
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v1 = 64 - ((v & 0x7F) << 1)
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else: # upslope
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v1 = 1 + (v << 1)
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else:
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if v & 0x80: # square wave; on/off
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v1 = 256
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if wave[wave_s][wave_type]: # triangle wave?
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if s & 0x80: # downslope
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s = (s & 0x7F) << 1
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s1 = 256 - s
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else: # upslope
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s = s<<1
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s1 = 1 + s
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s = 255 - s
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else:
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v1 = 1
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if s & 0x80: # square wave
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s1 = 256 # 100% saturation
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s = 0
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else: # 0% saturation
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s1 = 1
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s = 255
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# gamma rgb values
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gr = ((((r * s1) >> 8) + s) * v1) >> 8
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gg = ((((g * s1) >> 8) + s) * v1) >> 8
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gb = ((((b * s1) >> 8) + s) * v1) >> 8
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# Value (brightness) = 1-256 for similar reasons
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v = wave[wave_v][value_pixel]
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# gamma rgb indices range check
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if -256 < gr < 256:
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r = gamma[gr]
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# value (brightness) = 1-256 for similar reasons
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if wave[wave_v][wave_type]: # triangle wave?
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if v & 0x80: # downslope
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v1 = 64 - ((v & 0x7F) << 1)
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else: # upslope
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v1 = 1 + (v << 1)
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else:
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if v & 0x80: # square wave; on/off
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v1 = 256
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else:
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v1 = 1
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if -256 < gg < 256:
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g = gamma[gg]
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# gamma rgb values
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gr = ((((r * s1) >> 8) + s) * v1) >> 8
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gg = ((((g * s1) >> 8) + s) * v1) >> 8
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gb = ((((b * s1) >> 8) + s) * v1) >> 8
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if -256 < gb < 256:
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b = gamma[gb]
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# gamma rgb indices range check
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if -256 < gr < 256:
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r = gamma[gr]
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pixels[i] = (r, g, b)
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if -256 < gg < 256:
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g = gamma[gg]
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if -256 < gb < 256:
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b = gamma[gb]
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pixels[i] = (r, g, b)
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# update wave values along length of strip (values may wrap, is OK!)
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for w in range(3):
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wave[w][value_pixel] += wave[w][inc_pixel]
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# update wave values along length of strip (values may wrap, is OK!)
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for w in range(3):
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wave[w][value_pixel] += wave[w][inc_pixel]
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pixels.show()
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