export_mesh

Below is a demonstration of the features of the export_mesh function

Contents

clear; close all; clc;

Syntax

export_mesh(fileName,meshStruct);

Description

This function exports a .MESH file based on the meshStruct which should contain the vertices and elements.

Elements can be specified as either: meshStruct.elements or meshStruct.E

Vertices can be specified as either: meshStruct.vertices or meshStruct.V or meshStruct.nodes

This function currently only supporte tetrahedral and hexahedral element exporting.

The element type is either inferred from the size of the element matrix or can be set using: meshStruct.elementType Use meshStruct.elementType='Hexahedral', for 8-noded hexahedral elements Use meshStruct.elementType='Tetrahedral', for 4-noded tetrahedral elements

This implementation was created using examples of .MESH files contained in: https://github.com/cnr-isti-vclab/HexaLab

Examples

Exporting a .MESH file

Creating a solid hexahedral mesh sphere

Get example data

testCase=1;
switch testCase
    case 1 %Cube
        boxDim=[1 1 1];
        boxEl=[2 2 2];
        meshStruct=hexMeshBox(boxDim,boxEl);
    case 2 %Sphere
        %Control settings
        optionStruct.sphereRadius=10;
        optionStruct.coreRadius=5;
        optionStruct.numElementsMantel=5;
        optionStruct.numElementsCore=8;
        optionStruct.makeHollow=0;
        optionStruct.outputStructType=2;

        %Creating sphere
        [meshStruct]=hexMeshSphere(optionStruct);
end

Define file name

%Get toolbox folder paths
defaultFolder = fileparts(fileparts(mfilename('fullpath')));
savePath=fullfile(defaultFolder,'data','temp');

%Define file name
fileName=fullfile(savePath,'temp.mesh'); %File name for mesh file

Export mesh to .MESH file

export_mesh(fileName,meshStruct);

type(fileName)

MeshVersionFormatted 1 
Dimension 3 
Vertices 27 
-5.0000000000000000e-01 -5.0000000000000000e-01 -5.0000000000000000e-01 1 
-5.0000000000000000e-01 0.0000000000000000e+00 -5.0000000000000000e-01 1 
-5.0000000000000000e-01 5.0000000000000000e-01 -5.0000000000000000e-01 1 
0.0000000000000000e+00 -5.0000000000000000e-01 -5.0000000000000000e-01 1 
0.0000000000000000e+00 0.0000000000000000e+00 -5.0000000000000000e-01 1 
0.0000000000000000e+00 5.0000000000000000e-01 -5.0000000000000000e-01 1 
5.0000000000000000e-01 -5.0000000000000000e-01 -5.0000000000000000e-01 1 
5.0000000000000000e-01 0.0000000000000000e+00 -5.0000000000000000e-01 1 
5.0000000000000000e-01 5.0000000000000000e-01 -5.0000000000000000e-01 1 
-5.0000000000000000e-01 -5.0000000000000000e-01 0.0000000000000000e+00 1 
-5.0000000000000000e-01 0.0000000000000000e+00 0.0000000000000000e+00 1 
-5.0000000000000000e-01 5.0000000000000000e-01 0.0000000000000000e+00 1 
0.0000000000000000e+00 -5.0000000000000000e-01 0.0000000000000000e+00 1 
0.0000000000000000e+00 0.0000000000000000e+00 0.0000000000000000e+00 1 
0.0000000000000000e+00 5.0000000000000000e-01 0.0000000000000000e+00 1 
5.0000000000000000e-01 -5.0000000000000000e-01 0.0000000000000000e+00 1 
5.0000000000000000e-01 0.0000000000000000e+00 0.0000000000000000e+00 1 
5.0000000000000000e-01 5.0000000000000000e-01 0.0000000000000000e+00 1 
-5.0000000000000000e-01 -5.0000000000000000e-01 5.0000000000000000e-01 1 
-5.0000000000000000e-01 0.0000000000000000e+00 5.0000000000000000e-01 1 
-5.0000000000000000e-01 5.0000000000000000e-01 5.0000000000000000e-01 1 
0.0000000000000000e+00 -5.0000000000000000e-01 5.0000000000000000e-01 1 
0.0000000000000000e+00 0.0000000000000000e+00 5.0000000000000000e-01 1 
0.0000000000000000e+00 5.0000000000000000e-01 5.0000000000000000e-01 1 
5.0000000000000000e-01 -5.0000000000000000e-01 5.0000000000000000e-01 1 
5.0000000000000000e-01 0.0000000000000000e+00 5.0000000000000000e-01 1 
5.0000000000000000e-01 5.0000000000000000e-01 5.0000000000000000e-01 1 
Hexahedra 8 
1 4 5 2 10 13 14 11 1 
2 5 6 3 11 14 15 12 1 
4 7 8 5 13 16 17 14 1 
5 8 9 6 14 17 18 15 1 
10 13 14 11 19 22 23 20 1 
11 14 15 12 20 23 24 21 1 
13 16 17 14 22 25 26 23 1 
14 17 18 15 23 26 27 24 1 
End 

GIBBON www.gibboncode.org

Kevin Mattheus Moerman, [email protected]

GIBBON footer text

License: https://github.com/gibbonCode/GIBBON/blob/master/LICENSE

GIBBON: The Geometry and Image-based Bioengineering add-On. A toolbox for image segmentation, image-based modeling, meshing, and finite element analysis.

Copyright (C) 2006-2021 Kevin Mattheus Moerman and the GIBBON contributors

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Published with MATLAB® R2021a