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124 lines
3.8 KiB
124 lines
3.8 KiB
#!/usr/bin/env python3 |
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import sys |
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import random |
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import math |
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import argparse |
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import collections |
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import blup.frame |
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import blup.output |
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import blup.animation |
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import blup.writebml |
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import colorsys |
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WIDTH = 22 |
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HEIGHT = 16 |
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DEPTH = 256 |
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class Point(collections.namedtuple('Point', ['x', 'y'])): |
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def __add__(self, other): |
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return Point(self.x + other.x, self.y + other.y) |
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def __sub__(self, other): |
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return Point(self.x - other.x, self.y - other.y) |
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def __mul__(self, other): |
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if isinstance(other, Point): |
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raise Exception('not implemented') |
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else: |
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return Point(self.x * other, self.y * other) |
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def __truediv__(self, other): |
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if isinstance(other, Point): |
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raise ValueError() |
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else: |
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return self * (1/other) |
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@property |
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def len(self): |
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return math.sqrt(self.x**2 + self.y**2) |
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@property |
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def n(self): |
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n = Point(self.y, -self.x) |
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return n / n.len |
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@property |
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def intp(self): |
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return Point(int(round(self.x)), int(round(self.y))) |
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def convert_color(c): |
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return list(map(lambda x: int(round(x*(DEPTH-1))), c)) |
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def get_random_color(): |
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return colorsys.hsv_to_rgb(random.random(), 0.5 + random.random() / 2, 1) |
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class Twister: |
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def __init__(self, worldsize): |
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self.worldsize = worldsize |
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self.cycletime = 1.3 |
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self.sat = 0.5 + random.random() / 2 |
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self.hues = [random.random()] |
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self.hues += [ self.hues[0] + (i+1) * 0.25 for i in range(3) ] |
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random.shuffle(self.hues) |
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self.width = worldsize.x // 2.9 |
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def update(self, t, dt): |
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# inspired by https://www.lexaloffle.com/bbs/?tid=3050 |
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self.rows = [] |
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a0 = t * math.pi / self.cycletime |
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while len(self.rows) < self.worldsize.y: |
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y = len(self.rows) |
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a = a0 - y * math.pi / self.worldsize.y \ |
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* (math.sin(t * math.pi / 10) * 0.7) |
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ot1 = t * math.pi / 5 |
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ot2 = y * math.pi / (self.worldsize.y * 2) |
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offs = self.worldsize.x / 2 + math.sin(ot1 + ot2) * self.width / 2 |
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x1 = int(round(offs + self.width * math.sin(a))) |
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x2 = int(round(offs + self.width * math.sin(a+0.5*math.pi))) |
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x3 = int(round(offs + self.width * math.sin(a+math.pi))) |
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x4 = int(round(offs + self.width * math.sin(a+1.5*math.pi))) |
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row = [] |
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for i, (start, end) in enumerate([(x1, x2), (x2, x3), |
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(x3, x4), (x4, x1)]): |
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if start < end: |
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row += [(x, i, (x - start) / (end - start - 1)) |
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for x in range(start, end - 1)] |
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self.rows.append(row) |
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def draw(self, frame): |
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for y, line in enumerate(self.rows): |
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for point in line: |
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x, i, j = point |
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val = 1 - math.sin(j * math.pi) / 2.3 |
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color = colorsys.hsv_to_rgb(self.hues[i], self.sat, val) |
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try: |
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frame.setPixel(x, y, convert_color(color)) |
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except ValueError: |
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pass |
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if __name__ == '__main__': |
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parser = argparse.ArgumentParser(description='Generate animations') |
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parser.add_argument('-d', '--delay', type=int, default=50) |
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parser.add_argument('-t', '--time', type=int, default=15) |
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parser.add_argument('output_file') |
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args = parser.parse_args() |
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dim = blup.frame.FrameDimension(WIDTH, HEIGHT, DEPTH, 3) |
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anim = blup.animation.Animation(dim) |
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anim.tags['description'] = ' '.join(sys.argv) |
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twister = Twister(Point(WIDTH, HEIGHT)) |
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t = 0 |
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dt = args.delay / 1000 |
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while t < args.time: |
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t += dt |
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frame = blup.animation.AnimationFrame(dim, args.delay) |
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twister.update(t, dt) |
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twister.draw(frame) |
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anim.addFrame(frame) |
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blup.writebml.writeBml(anim, args.output_file)
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