Hi Frank,
I understand that you have a 3D surface mesh created using MATLAB "trimesh" function. Additionally, you want to visualize the 2D slices along the z axis of the mesh with clear outlines and filled interiors.
To achieve this, you can utilize MATLAB's "contourf" function to generate filled contour plot that display the x-y outlines of the 3D mesh at any given z-axis value.
Following is the code snippet demonstrating the above-mentioned approach-
% Define the 3D surface
[x,y] = meshgrid(1:15,1:15);
z = peaks(15);
T = delaunay(x,y);
trimesh(T,x,y,z)
% Define the z value at which you want to plot the contour
z_value = 1;
[x_plane, y_plane] = meshgrid(0:0.1:15, 0:0.1:15);
z_plane = z_value*ones(size(x_plane));
% Plot the plane at z=z_value
hold on;
title("3D mesh and the 2D cross-section plane")
surf(x_plane, y_plane, z_plane, 'FaceAlpha', 0.5, 'EdgeColor', 'none');
hold off
% Plot the contour at the given z value
contourf(x, y, z, [z_value z_value], 'LineColor', 'r', 'LineWidth', 1);title("2D cross-section of the 3D mesh");
Further, refer to the following documentation for more details on how to use the “contourf” function –
Hope this helps you in plotting the 2D cross sections of your 3D plot.
Best Regards,
Vinayak Luha
