# tesgrid

Below is a demonstration of the features of the `tesgrid` function

## Contents

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

## Syntax

`[F,V]=tesgrid(xrange,yrange);` `[E,V]=tesgrid(xrange,yrange,zrange);`

## Description

This function generates a gridded mesh and outputs a tesselation for that mesh. The input is similar to that of the `ndgrid` function in that a desired range for the x, y, and z coordinates is given. The output consists of the mesh simplices. For 2D input only the x and y ranges are specified and the output consists of quadrilateral faces and vertices of a 2D mesh. For 3D input the z coordinate range is also specified and the output consists of hexahedral elements and vertices.

## Examples

Plot settings

fontSize=20; faceAlpha1=0.8;

## Creating a quadrilateral gridded mesh using `tesgrid`

Specifying coordinate ranges

xrange=linspace(-5,5,20); yrange=linspace(0,11,11);

Using `tesgrid` to create a gridded quadrilateral mesh

[F,V]=tesgrid(xrange,yrange);

Plotting model

cFigure; hold on; title('A gridded quadrilateral mesh','FontSize',fontSize); gpatch(F,V,'gw','k',faceAlpha1); %Visualize the mesh patchNormPlot(F,V); %Show normal directions axisGeom(gca,fontSize); camlight headlight; drawnow;

## Creating a hexahedral gridded mesh using `tesgrid`

Specifying coordinate ranges

xrange=linspace(-3,3,6); yrange=linspace(0,11,4); zrange=linspace(-pi,pi,6);

Using `tesgrid` to create a gridded quadrilateral mesh

[E,V]=tesgrid(xrange,yrange,zrange); [F]=element2patch(E);

Plotting model

cFigure; hold on; title('A gridded hexahedral mesh','FontSize',fontSize); gpatch(F,V,'gw','k',faceAlpha1); %Visualize the mesh patchNormPlot(F,V); %Show normal directions axisGeom(gca,fontSize); camlight headlight; drawnow;

* GIBBON* www.gibboncode.org

*Kevin Mattheus Moerman*, gibbon.toolbox@gmail.com

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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) 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.

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