折るを科学するデザインブランド

# miura_pattern.py import numpy as np import matplotlib.pyplot as plt import random def miura_ori(rows=12, cols=10, a=1.0, b=0.6, theta=np.deg2rad(72)): c = a * np.cos(theta) d = a * np.sin(theta) points = [] lines_mountain = [] lines_valley = [] # 点生成 for i in range(rows+1): row = [] for j in range(cols+1): x = j * 2 * c + (i % 2) * c y = i * (d + b) row.append((x, y)) points.append(row) # 折り線生成（境界線を除外） for i in range(rows): for j in range(cols): p = points[i][j] pr = points[i][j+1] pd = points[i+1][j] pdr= points[i+1][j+1] # 横線（谷折り）: 最終列は描かない if j < cols - 1: lines_valley.append([p, pr]) # 縦線: 最終行は描かない if i < rows - 1: lines_valley.append([p, pd]) # 対角線（山折り）: 最終行・最終列は描かない if i < rows - 1 and j < cols - 1: if (i + j) % 2 == 0: lines_mountain.append([p, pdr]) else: lines_mountain.append([pr, pd]) return lines_mountain, lines_valley # 和色パレット（オリジナル） wacolors = [ "#6B7A8F", # 藍鼠 "#5BA199", # 青竹色 "#C4976A", # 黄唐茶 "#8B8C89", # 錫色 "#2C2C2C" # 墨色 ] fig = plt.figure(figsize=(8,10), facecolor="#f8f5ee") ax = plt.gca() mountain, valley = miura_ori() # 谷折り（薄墨） for line in valley: xs = [line[0][0], line[1][0]] ys = [line[0][1], line[1][1]] ax.plot(xs, ys, color="#A3A3A1", linewidth=0.7) # 山折り（ランダム和色） for line in mountain: xs = [line[0][0], line[1][0]] ys = [line[0][1], line[1][1]] ax.plot(xs, ys, color=random.choice(wacolors), linewidth=1.2) ax.set_aspect("equal") plt.axis("off") plt.tight_layout() plt.savefig("miura_pattern.png", dpi=350, facecolor="#f8f5ee")