scalePatch

Below is a demonstration of the features of the scalePatch function

Syntax
Description
Examples
Example: Seperate and scale faces homogeneously
Example: Seperate and shrink faces in a spatially varying way

Syntax

[Fs,Vs]=scalePatch(F,V,scalefactor);

Description

This function seperates the nodes (if shared) for all faces. If a constant or spatially varying scalefactor is provided the faces are scaled (around their mean) as well.

Examples

clear; close all; clc;

Plot settings

fontSize=15;
plotColor1=0.25.*ones(1,3);
plotColor2=0.75.*ones(1,3);
edgeWidth=2;
markerSize=25;

Example: Seperate and scale faces homogeneously

%Defining geodesic dome triangulation
r=1; %sphere radius
n=2; %Refinements
[F,V,~]=geoSphere(n,r);

%Detach nodes and shrink faces
scaleFactor=0.5;
[Fs,Vs]=scalePatch(F,V,scaleFactor);

%Plotting results

cFigure;
subplot(1,2,1); hold on;
gpatch(F,V,'rw','k',1,edgeWidth);
axisGeom(gca,fontSize);
camlight headlight;
view(2);

subplot(1,2,2); hold on;
gpatch(F,V,'rw','none',0.5);
gpatch(Fs,Vs,'bw','k',1,edgeWidth);
axisGeom(gca,fontSize);
camlight headlight;
view(2);

drawnow;

Example: Seperate and shrink faces in a spatially varying way

Create a spatially varying shrink factor between 0 and 1

scaleFactor=V(:,2);
scaleFactor=mean(scaleFactor(F),2);
scaleFactor=scaleFactor-min(scaleFactor(:));
scaleFactor=scaleFactor./max(scaleFactor(:));

Detach nodes and shrink faces

[Fs,Vs]=scalePatch(F,V,scaleFactor);

Plotting results

cFigure;
subplot(1,2,1); hold on;
gpatch(F,V,'rw','k',1,edgeWidth);
axisGeom(gca,fontSize);
camlight headlight;
view(2);

subplot(1,2,2); hold on;
gpatch(F,V,'rw','none',0.5);
gpatch(Fs,Vs,'bw','k',1,edgeWidth);
axisGeom(gca,fontSize);
camlight headlight;
view(2);

drawnow;

GIBBON www.gibboncode.org

Kevin Mattheus Moerman, [email protected]

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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.

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.

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