plot many sphere with variant radii

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amir ansari 2020-11-11

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https://ww2.mathworks.cn/matlabcentral/answers/644893-plot-many-sphere-with-variant-radii

回答： Aashray 2025-4-24

hi to all

i have spheres centers and radii and i just want to plot n spheres with variant radii in a cube ,like below figure.how can i do that?

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amir ansari 2020-11-11

i forgot to say that the links are not important and just sphere's need

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Answer 1

Aashray 2025-4-24

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https://ww2.mathworks.cn/matlabcentral/answers/644893-plot-many-sphere-with-variant-radii#answer_1564146

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Hello Amir

MATLAB’s built-in “surf” function can be used to plot surfaces in three dimensions. I have included an example code below for better understanding:

n = 35; % Number of spheres 
cubeSize = 10; % Cube dimensions 
% Using placeholder values for radii and centers 
radii = 0.5 + rand(n, 1)*0.4;                   
centers = radii + (cubeSize - 2 * radii) .* rand(n, 3);  
% These values can be replaced by actual values as below: 
% radii = [1.2; 0.8; 1.5; ...]; 
% centers = [2, 3, 4; 
%            5, 5, 5; 
%            1, 1, 1; 
%            ...]; 
% Plot setup 
figure; 
hold on; 
axis equal; 
xlim([0 cubeSize]); 
ylim([0 cubeSize]); 
zlim([0 cubeSize]); 
xlabel('X'); 
ylabel('Y'); 
zlabel('Z'); 
title('Spheres with Given Centers and Radii'); 
% Plot each sphere using the given center and radius 
for i = 1:n 
    r = radii(i); 
    center = centers(i, :); 
    
    [X, Y, Z] = sphere(20);  % Resolution of sphere 
    X = r * X + center(1); 
    Y = r * Y + center(2); 
    Z = r * Z + center(3); 
    
    % Plot the sphere 
    surf(X, Y, Z, 'EdgeColor', 'none', 'FaceAlpha', 0.9); 
end 
view(3); 
grid on; 