mirror of https://github.com/pyodide/pyodide.git
36 lines
1014 B
Python
36 lines
1014 B
Python
# setup: import numpy as np; image = np.zeros((64, 32), dtype = np.uint8)
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# run: mandel(-2.0, 1.0, -1.0, 1.0, image, 20)
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# pythran export mandel(float, float, float, float, uint8[][], int)
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def kernel(x, y, max_iters):
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"""
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Given the real and imaginary parts of a complex number,
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determine if it is a candidate for membership in the Mandelbrot
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set given a fixed number of iterations.
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"""
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c = complex(x, y)
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z = 0.0j
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for i in range(max_iters):
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z = z * z + c
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if (z.real * z.real + z.imag * z.imag) >= 4:
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return i
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return max_iters
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def mandel(min_x, max_x, min_y, max_y, image, iters):
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height = image.shape[0]
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width = image.shape[1]
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pixel_size_x = (max_x - min_x) / width
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pixel_size_y = (max_y - min_y) / height
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for x in range(width):
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real = min_x + x * pixel_size_x
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for y in range(height):
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imag = min_y + y * pixel_size_y
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color = kernel(real, imag, iters)
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image[y, x] = color
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