2D to 3D extrusion

Question

Mohamed Alhajeri 2021-3-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/765571-2d-to-3d-extrusion

评论： darova 2021-3-9

After creating a polyshape from a set of input vertices (x,y) using the polyshape function, I need to extrude and plot the shape (with z value) such that it becomes 3D. Is there any available functions to do that? if not please help me in developing the next lines of code to do so.

The following is the simple way in which I wrote the starting lines of code upto creating a 2D polygon.

clc; clear;
[x y] = ginput(5);
plot(x,y,'r*');
hold on
p1 = polyshape(x,y)
plot(p1)

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Answer 1

darova 2021-3-8

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/765571-2d-to-3d-extrusion#answer_642276

在 MATLAB Online 中打开

Here is an example (not tested)

clc; clear;
[x y] = ginput(5);
z0 = 5;
patch(x,y,'r')          % face wall
patch(x,y,x*0+z0,'r')   % back wall
surface([x(:) x(:)],[y(:) y(:)],[x(:)*0 x(:)*0+z0],'facecolor','r')

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Mohamed Alhajeri 2021-3-9

Thanks for the help, I got the basic idea how to proceed in my code. One more thing, can we use boolean operations with surfaces like subtracting, union etc with two or more surfaces?