Hello Oanh,
Below is the code that produces a 3D sphere using isonormals:
% Define the grid
[x, y, z] = meshgrid(linspace(-1, 1, 50));
% Define the equation of the sphere
v = x.^2 + y.^2 + z.^2;
% Create the figure
figure;
% Plot the isosurface for the sphere
h = patch(isosurface(x, y, z, v, 1));
% Apply isonormals to improve the rendering
isonormals(x, y, z, v, h);
% Set the color of the sphere
% Replace [0.5, 0.5, 0.8] with your desired RGB color
h.FaceColor = [0.5, 0.5, 0.8];
h.EdgeColor = 'none';
% Adjust lighting and view for better visualization
camlight;
lighting gouraud;
axis equal;
xlabel('X-axis');
ylabel('Y-axis');
zlabel('Z-axis');
title('3D Sphere with Isonormals');
Here is the link for isnormals() function for your reference:
I hope this works!
