Fill the interior of a cylinder surface - SURF - generated by parametric equations

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William 2015-3-4

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评论： Jetsadaporn Simsiriwong 2017-8-15

采纳的回答： Brendan Hamm

在 MATLAB Online 中打开

I've generated a cylinder using the parametric equations:

u = linspace(0,2*pi,50);
v = linspace(0,2*pi,50);
[u,v] = meshgrid(u,v);
x = cos(u);
y = sin(u);
z = v;

where u and v are 0-pi.

I've got a plot surf(x,y,z) of this cylinder and I want to fill all the interior points. Does anyone know how I can do this?

How can I do this?

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Andrew Newell 2015-3-5

Or do you mean that you want to cap the ends so it looks solid?

William 2015-3-6

I want it to be "physically" solid, so the interior points also have markers. Ideally so it is represented in binary i.e. 1 - where it is, 0 - where it isn't

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采纳的回答

Brendan Hamm 2015-3-5

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编辑：Brendan Hamm 2015-3-5

在 MATLAB Online 中打开

If you are trying to just put anything in that location you can do the following to place circles there. First create a meshgrid of the x-y space.

surf(x,y,z)
hold on
u2 = linspace(-1,1);
v2 = u2;
[x2, y2] = meshgrid(u2,v2);
% Find distances
dist = sqrt(x2.^2 + y2.^2);
dist(dist>1) = 1;
dist(dist<1) = 0;
dist = logical(dist); % Logical matrix of exterior points
% Set exterior points to NaN
x2(dist) = NaN;
y2(dist) = NaN;
z2 = 2*pi*ones(size(x2)); % Just the highest point.
scatter3(x2(:),y2(:),z2(:)); % Scatter expects vectors, so stack everything