生成多个互不重叠的不同半径圆

https://www.zhihu.com/question/53012468

固定区域，生成所有圆，统计圆的面积，最后面积最大的就是答案。

      import numpy as np
      from scipy.optimize import minimize
      from scipy.spatial.distance import pdist
      import matplotlib.pyplot as plt
      import os
      def obj_grad_round(x, radii, pair_index_to_index_pair, repulsion_scale, attraction_scale):
       n = len(radii)
       centroids = np.reshape(x, (n, 2))
       circles_pdist_sqrd = pdist(centroids, 'sqeuclidean')
       obj = 0
       grad = np.zeros((n, 2))
       for pidx, dist_sqrd in enumerate(circles_pdist_sqrd):
       i, j = pair_index_to_index_pair[pidx]
       touching_dist_sqrd = (radii[i] + radii[j]) ** 2
       grad_inc = 4 * (dist_sqrd - touching_dist_sqrd) * (centroids[i, :] - centroids[j, :])
       scale = repulsion_scale if dist_sqrd < touching_dist_sqrd
  
 

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原文链接：blog.csdn.net/jacke121/article/details/85016402