MATLAB: Creating Caps to close a tubular structure

tube

Hi All

I have created this tubular shell structure in matlab.

I would like to create caps to close the end

[F,V] = surf2patch(x_All,y_All,z_All,'triangles');

h = patch('faces',F,'vertices',V);

set(h,'FaceColor',[0.5 0.5 0.8],'EdgeColor','k');

view(3)

Best Answer

I cannot run your code.

Adapt this to your cylinder:

D = 10;
[X,Y,Z] = cylinder(D);
r = D;
ang = linspace(0, 2*pi);
xcirc = r*cos(ang);
ycirc = r*sin(ang);
zcirc = ones(size(ang))*max(Z(:));
figure
surf(X, Y, Z)
hold on
patch(xcirc, ycirc, zcirc, 'r')
hold off
grid on

This creates a red ‘top’ to the cylinder. To cap it on the other end, duplicate the patch call, however substituting:

zcirc = ones(size(ang))*min(Z(:));

in the second call.

Related Solutions

MATLAB: How to plot a prism

Use surf instead of plot3 if you want solid-appearing sides.

Try this:

figure
surf([x;x].', [y;y].', [z,zz], 'FaceColor','g')
grid on
% axis equal
% shading('interp')

The axis and shading calls are optional. Note that the surf arguments are two-column martices.

MATLAB: Two patches in one figure

It should work. Please try it again:

axes('nextplot, 'add');  % Like "hold on"
disk1 = patch('xdata', xcirc1(:,1), 'ydata', ycirc1(:,1), 'zdata', zcirc1(:,1));
disk2 = patch('xdata', xcirc2(:,1), 'ydata', ycirc2(:,1), 'zdata', zcirc2(:,1));
for ii = 1:length(y)
  set(disk1, 'xdata', xcirc1(:,ii), 'ydata', ycirc1(:,ii), 'zdata', zcirc1(:,ii));
  set(disk2, 'xdata', xcirc2(:,ii), 'ydata', ycirc2(:,ii), 'zdata', zcirc2(:,ii));
  drawnow
  pause(0.01)
end

If the coordinates are not Inf or NaN and are within the axes limits and the view direction is not parallel to the planes of the circles, the patches must be visible.

Best Answer

Related Solutions

MATLAB: How to plot a prism

MATLAB: Two patches in one figure

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