How to Revolve a 2D Profile and Make it's 3D Plot

Question

Mahmoud Abbas 2022-4-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1694550-how-to-revolve-a-2d-profile-and-make-it-s-3d-plot

回答： mark li 2022-4-12

Hello, i am trying to figure out how to revolve this profile around any axis (lets assume x=35) and make the plot in 3D. I found a really good solution here (https://www.mathworks.com/matlabcentral/answers/522502-how-can-i-revolve-a-2d-plot-by-2pi-around-an-axis-to-make-a-3d-surface-plot) but i am having trouble applying to this simple code

x = [82,80,65,38,82]

y = [82,54,36,94,82]

plot(x,y)

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Answer 1

mark li 2022-4-12

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1694550-how-to-revolve-a-2d-profile-and-make-it-s-3d-plot#answer_940940

在 MATLAB Online 中打开

This is a example:

x = [82,80,65,38,82];
y = [82,54,36,94,82];
x_zero = 35;
theta = linspace(0,2*pi,100);
X = [];
Y = [];
Z = [];
for i = 1 : length(x)
    X_new = sin(theta)*(x(i)-x_zero)+x_zero;
    Y_new = cos(theta)*(x(i)-x_zero)+x_zero;
    Z_new = y(i)*ones(1,100);
    X = [X ; X_new];
    Y = [Y ; Y_new];
    Z = [Z ; Z_new];
end
surface(X, Y , Z)