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152 lines
4.0 KiB
152 lines
4.0 KiB
#!/usr/bin/python |
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# inspired by: |
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# http://lodev.org/cgtutor/plasma.html |
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import sys |
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import time |
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import math |
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#import pygame |
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import colorsys |
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from neopixel import * |
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class Plasma(object): |
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def __init__(self, width, height): |
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self.width = width |
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self.height = height |
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self.pixelvalues = [[0] * height for i in xrange(width)] |
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self.pixelsReady = False |
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self.offset = 0 |
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self.update() |
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@property |
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def minValue(self): |
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return min(map(min, self.pixelvalues)) |
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@property |
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def maxValue(self): |
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return max(map(max, self.pixelvalues)) |
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def applyPalette(self, palette): |
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min = self.minValue |
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max = self.maxValue |
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norm = lambda x: ((x - min) / max) |
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pixeldata = [ [None] * self.height for i in xrange(self.width) ] |
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for x in xrange(self.width): |
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rowvalues = self.pixelvalues[x] |
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for y in xrange(self.height): |
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pixeldata[x][y] = palette.getColorValue(norm(rowvalues[y])) |
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return pixeldata |
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def update(self): |
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#if self.pixelsReady: |
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# return |
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self.offset += 1 |
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for x in xrange(self.width): |
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for y in xrange(self.height): |
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xx = x+self.offset |
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yy = y+self.offset |
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#xx = 10*x+self.offset |
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#yy = 10*y+self.offset |
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p = 128 + 128 * math.sin(xx / 9.0) |
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p += 128 + 128 * math.sin(yy / 16.0) |
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p += 128 + 128 * math.sin((yy + xx) / 16.0) |
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p += 128 + 128 * math.sin(math.sqrt(yy*yy + xx*xx) / 16.0) |
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p += 128 + 8 * math.sin(math.sqrt(yy* xx) / 16.0) |
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self.pixelvalues[x][y] = p |
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self.pixelsReady = True |
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class Palette(object): |
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def __init__(self): |
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self.offset = 0 |
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self.cache = {} |
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def getColorValue(self, x): |
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x = round(x, 3) |
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if self.cache.has_key(x): |
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return self.cache[x] |
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c = colorsys.hsv_to_rgb((x + self.offset) % 1, 1, 1) |
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#c = map(lambda x: int(x * 7), c) |
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depth = 255 |
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c = map(lambda x: int(x * depth), c) |
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self.cache[x] = c |
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return c |
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def update(self): |
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self.cache = {} |
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self.offset += 0.01 |
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if self.offset > 1: |
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self.offset -= 1 |
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############################################## |
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w = 22 |
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h = 16 |
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#w = 80 |
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#h = 18 |
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scalex = 30 |
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scaley = 60 |
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plasma = Plasma(w,h) |
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palette= Palette() |
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#screen = pygame.display.set_mode((w*scalex, h*scaley)) |
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#pygame.display.update() |
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##dim = blup.frame.FrameDimension(w, h, 8, 3) |
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#dim = blup.frame.FrameDimension(w, h, 8, 3) |
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##out = blup.output.getOutput('serialblup:/dev/ttyUSB0:115200') |
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##out = blup.output.getOutput('colorfulshell') |
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##out = blup.output.getOutput('e3blp:bastel0:4242') |
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#out = blup.output.getOutput('e3blp') |
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# LED strip configuration: |
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LED_COUNT = 352 # Number of LED pixels. |
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LED_PIN = 13 # GPIO pin connected to the pixels (must support PWM!). |
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LED_FREQ_HZ = 800000 # LED signal frequency in hertz (usually 800khz) |
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LED_DMA = 5 # DMA channel to use for generating signal (try 5) |
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LED_BRIGHTNESS = 50 # Set to 0 for darkest and 255 for brightest |
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LED_INVERT = False # True to invert the signal (when using NPN transistor level shift) |
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LED_PWM = 1 |
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strip = Adafruit_NeoPixel(LED_COUNT, LED_PIN, LED_FREQ_HZ, LED_DMA, LED_INVERT, LED_BRIGHTNESS, LED_PWM) |
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strip.begin() |
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while True: |
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#screen.fill((0,0,0)) |
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#print 'updating palette...' |
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palette.update() |
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#print 'updating plasma...' |
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plasma.update() |
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#print 'applying palette...' |
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pixeldata = plasma.applyPalette(palette) |
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#print 'drawing...' |
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#f = blup.frame.Frame(dim) |
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for y in xrange(h): |
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for x in xrange(w): |
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if x%2 == 0: |
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lednum = x*h + y |
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else: |
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lednum = x*h - y + 15 |
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strip.setPixelColor(lednum, Color(*pixeldata[x][y])) |
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strip.show() |
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#print 'done drawing' |
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#out.sendFrame(f) |
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#pygame.display.update() |
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#print 'done updating' |
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#time.sleep(0.01) |
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