Below is a demonstration of the features of the quad2tri function

## Examples

```clear; close all; clc;
```

Plot settings

```fontSize=10;
```

## Example: Converting a quandrangulated surface to a triangulated surface

Create example geometry

```[X,Y,Z]=peaks(15);
[F,V,CV]=surf2patch(X,Y,Z,Z);
[C]=vertexToFaceMeasure(F,CV);
```

Visualisation

```cFigure;
gpatch(F,V,C,'k');
axisGeom(gca,fontSize);
colormap(gjet(250)); colorbar;
drawnow;
```

Convert triangular faces to quadrilateral faces

```cFigure;
subplot(2,3,1);
gpatch(F,V,C,'k');
axisGeom;
view(-30,70);
colormap(gjet(250));

optionSet={'f','b','x','e','a'};
titleString={'forw. slash','backw. slash','cross','edge length','angle'};
numOptions=numel(optionSet);
for q=1:1:numOptions
subplot(2,3,q+1);
title(['Option ''',optionSet{q},''' ',titleString{q}],'FontSize',fontSize);
gpatch(Ft,Vt,Ct,'k');
axisGeom;
view(-30,70);
colormap(gjet(250));
end
drawnow;
```

GIBBON www.gibboncode.org

Kevin Mattheus Moerman, [email protected]

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

Copyright (C) 2019 Kevin Mattheus Moerman

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/.