% 伞的参数num_ribs = 5; % 伞骨数量修改为5R = 1; % 伞的半径height = 0.5; % 伞的高度handle_length = 2; % 伞柄长度semicircle_radius = 0.26; % 伞柄末端半圆的半径% 生成伞叶网格theta = linspace(0, 2*pi, 100);phi = linspace(0, pi/2, 50);[Theta, Phi] = meshgrid(theta, phi);% 计算伞叶的坐标X = R * cos(Theta) .* sin(Phi);Y = R * sin(Theta) .* sin(Phi);Z = height * cos(Phi);% 给伞叶添加一些随机波动，模拟褶皱noise = 0.009 * randn(size(Z));Z = Z + noise;% 绘制伞叶figure;surf(X, Y, Z, 'FaceColor', 'interp', 'EdgeColor', 'none');hold on% 绘制伞骨for i = 1:num_ribstheta_rib = (i - 1) * 2*pi / num_ribs;x_rib = R * cos(theta_rib) * sin(phi);y_rib = R * sin(theta_rib) * sin(phi);z_rib = height * cos(phi);plot3(x_rib, y_rib, z_rib, 'k', 'LineWidth', 2);hold onend% 绘制伞柄x_handle = [0, 0];y_handle = [0, 0];z_handle = [0, -handle_length+0.5];plot3(x_handle, y_handle, z_handle+[0.5,0.5], 'k', 'LineWidth', 3);hold onx_handle = [0, 0];y_handle = [0, 0];z_handle = [0, handle_length*0.1];plot3(x_handle, y_handle, z_handle+[0.5,0.5], 'k', 'LineWidth', 3);hold on% 绘制伞柄末端的半圆semicircle_theta = linspace(0, pi, 50);x_semicircle = semicircle_radius * cos(semicircle_theta);y_semicircle = -handle_length * ones(size(semicircle_theta));z_semicircle = -semicircle_radius * sin(semicircle_theta);plot3(x_semicircle+0.15+0.12, y_semicircle+2, z_semicircle-1, 'k', 'LineWidth', 3);% 设置视角和坐标轴axis equal;view(3);box on;camlight;lighting gouraud;