| """ | |
| =========== | |
| Fill Spiral | |
| =========== | |
| """ | |
| import matplotlib.pyplot as plt | |
| import numpy as np | |
| theta = np.arange(0, 8*np.pi, 0.1) | |
| a = 1 | |
| b = .2 | |
| for dt in np.arange(0, 2*np.pi, np.pi/2.0): | |
| x = a*np.cos(theta + dt)*np.exp(b*theta) | |
| y = a*np.sin(theta + dt)*np.exp(b*theta) | |
| dt = dt + np.pi/4.0 | |
| x2 = a*np.cos(theta + dt)*np.exp(b*theta) | |
| y2 = a*np.sin(theta + dt)*np.exp(b*theta) | |
| xf = np.concatenate((x, x2[::-1])) | |
| yf = np.concatenate((y, y2[::-1])) | |
| p1 = plt.fill(xf, yf) | |
| plt.show() | |