blup/staticSinePlasma.py

#!/usr/bin/python

# inspired by:
# http://lodev.org/cgtutor/plasma.html

import sys
import time
import math
#import pygame
import colorsys
import blup.frame
import blup.output


class Plasma(object):
	def __init__(self, width, height):
		self.width = width
		self.height = height

		self.pixelvalues = [[0] * height for i in xrange(width)]
		self.pixelsReady = False
		self.offset = 0
		self.update()

	@property
	def minValue(self):
		return min(map(min, self.pixelvalues))

	@property
	def maxValue(self):
		return max(map(max, self.pixelvalues))

	def applyPalette(self, palette):
		min = self.minValue
		max = self.maxValue
		norm = lambda x: ((x - min) / max)

		pixeldata = [ [None] * self.height for i in xrange(self.width) ]

		for x in xrange(self.width):
			rowvalues = self.pixelvalues[x]
			for y in xrange(self.height):
				pixeldata[x][y] = palette.getColorValue(norm(rowvalues[y]))

		return pixeldata

	def update(self):
		#if self.pixelsReady:
		#	return
		self.offset += 1

		for x in xrange(self.width):
			for y in xrange(self.height):
				xx = x+self.offset
				yy = y+self.offset
				p = 128 + 128 * math.sin(xx / 9.0)
				p += 128 + 128 * math.sin(yy / 16.0)
				p += 128 + 128 * math.sin((yy + xx) / 16.0)
				p += 128 + 128 * math.sin(math.sqrt(yy*yy + xx*xx) / 16.0)
				p += 128 + 8 * math.sin(math.sqrt(yy* xx) / 16.0)
				self.pixelvalues[x][y] = p
		self.pixelsReady = True

class Palette(object):
	def __init__(self):
		self.offset = 0
		self.cache = {}

	def getColorValue(self, x):
		x = round(x, 3)
		if self.cache.has_key(x):
			return self.cache[x]
		c = colorsys.hsv_to_rgb((x + self.offset) % 1, 1, 1)
		c = map(lambda x: int(x * 255), c)
		self.cache[x] = c
		return c

	def update(self):
		self.cache = {}
		self.offset += 0.01
		if self.offset > 1:
			self.offset -= 1

##############################################

w = 22
h = 16

#w = 80
#h = 18

scalex = 30
scaley = 60

plasma = Plasma(w,h)
palette= Palette()

#screen = pygame.display.set_mode((w*scalex, h*scaley))
#pygame.display.update()

#dim = blup.frame.FrameDimension(w, h, 8, 3)
dim = blup.frame.FrameDimension(w, h, 256, 3)
#out = blup.output.getOutput('serialblup:/dev/ttyUSB0:115200')
#out = blup.output.getOutput('colorfulshell')
#out = blup.output.getOutput('e3blp:bastel0:4242')
out = blup.output.getOutput('e3blp')

while True:
	#screen.fill((0,0,0))

	#print 'updating palette...'
	palette.update()
	#print 'updating plasma...'
	plasma.update()
	#print 'applying palette...'
	pixeldata = plasma.applyPalette(palette)

	#print 'drawing...'
	f = blup.frame.Frame(dim)
	for x in xrange(w):
		#rowdata = pixeldata[x]
		for y in xrange(h):
			#pygame.draw.rect(screen, pixeldata[x][y], (x*scalex, y*scaley, scalex, scaley), 0)
			#pygame.draw.circle(screen, rowdata[y], (x, y), 1, 1)
			i= f.setPixel(x, y, pixeldata[x][y])
			#print frame.channels, frame.depth
	#print 'done drawing'

	out.sendFrame(f)

	#pygame.display.update()
	#print 'done updating'
	#time.sleep(0.05)