Export 3D MATLAB figure to EM Simulation Software (CST).

Hello,

I would like to create a cone using a square mesh and export it to CST software. I am familiar with using the triangulation function to create an STL file for a triangular mesh, but I'm unsure how to proceed with a polygonal mesh. Could you please guide me on how to generate an OBJ file for a cone made of a square mesh that can be imported into CST software?

Here is a code for a cone I want to export:

clear all
clc
res=0.5;
x=-5:res:5;
y=-5:res:5;
Z0=10;
alpha=20;

[X,Y]=meshgrid(x,y);
R=sqrt(X.^2+Y.^2);
Z=Z0-R*cotd(alpha);

figure()
f=surf(X,Y,Z)

f = 
  Surface with properties:

       EdgeColor: [0 0 0]
       LineStyle: '-'
       FaceColor: 'flat'
    FaceLighting: 'flat'
       FaceAlpha: 1
           XData: [21×21 double]
           YData: [21×21 double]
           ZData: [21×21 double]
           CData: [21×21 double]

  Use GET to show all properties

axis equal

Thank you in advance!

Answer 1

[Pratyush Swain]

Hi Michael,

Exporting 3D MATLAB Figure to the .obj file format is not directly supported.Please refer to this third-party library from FILE Exchange on MATLAB Central: https://www.mathworks.com/matlabcentral/fileexchange/27982-wavefront-obj-toolbox which has a function “write_wobj(OBJ,filename)” that can export 3D figure as an .obj file.

Additionally you can also refer to following resources:

1 - https://www.mathworks.com/matlabcentral/fileexchange/72906-save-wavefront-obj-files-simple-or-colour

2- https://www.mathworks.com/matlabcentral/fileexchange/20922-stlwrite-write-ascii-or-binary-stl-files

Hope this helps.