Created
April 29, 2020 11:47
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Dive into Mandelbrot fractal (GIF, Python)
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from PIL import Image | |
from tqdm import tqdm | |
import math | |
W, H = 200, 200 # размеры картинки | |
ITER = 255 | |
FRAMES = 100 | |
def get_palette(max_iter): | |
palette = [ | |
( | |
int(255 * math.sin(i / 50.0 + 1.0) ** 2), | |
int(255 * math.sin(i / 50.0 + 0.5) ** 2), | |
int(255 * math.sin(i / 50.0 + 1.7) ** 2) | |
) for i in range(max_iter - 1) | |
] | |
palette.append((0, 0, 0)) | |
return palette | |
def mandelbrot(w, h, palette, x1=-2, y1=-1, x2=1, y2=1): | |
img = Image.new('RGB', (w, h)) | |
dx = x2 - x1 | |
dy = y2 - y1 | |
iters = len(palette) | |
n = 0 | |
for px in range(w): | |
for py in range(h): | |
# преобразование координат | |
x = px / w * dx + x1 | |
y = py / h * dy + y1 | |
c = x + 1j * y # смещение из координат | |
z = 0j # начальная точка | |
for n in range(iters): | |
z = z ** 2 + c | |
if (z * z.conjugate()).real > 4.0: # разошлось | |
break | |
img.putpixel((px, py), palette[n]) | |
return img | |
def main(): | |
x, y, r = 0, 0, 5 | |
x_tar, y_tar, r_tar = -0.74529, 0.113075, 1.5e-6 | |
palette = get_palette(ITER) | |
frames = [] | |
for _ in tqdm(range(FRAMES)): | |
frames.append(mandelbrot(W, H, palette, x - r, y - r, x + r, y + r)) | |
x += (x_tar - x) * 0.1 | |
y += (y_tar - y) * 0.1 | |
r += (r_tar - r) * 0.1 | |
frames[0].save('mandel.gif', save_all=True, append_images=frames[1:], duration=60, loop=0) | |
if __name__ == '__main__': | |
main() |
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The resulting GIF animation
If you want to run this dont forget to
pip install pillow tqdm