Create STL from patch object or simlar
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Hello,
Currently, I have several matrices that represent the (x,y) coordinates for contours. In the image shown, I am just plotting those contours using the 'patch' command. What I need to do, however, is export these contours (either individually, or all at once) as an STL file to be opened in a CAD software.
Matlab's 'stlwrite' command only accepts a triangulation object as an argument. However, currently, when I try to create a triangulation of one of the contours (in the image shown it is of the outermost contour), I get a distorted and incorrect representation.
It seems like this should be a simple task to do, so any help would be greatly appreciated.
3 Comments
Answers (1)
KSSV
on 3 Mar 2022
load('Contours.mat') ;
p = [perimeter1 ; perimeter2 ; perimeter3 ; perimeter4 ; perimeter5 ; perimeter6 ; perimeter7 ; perimeter8 ;
perimeter9] ;
id = knnsearch(p,perimeter1) ;
C = [id(1:end-1) id(2:end)];
% Make delaunay triangulation with constriants
dt = delaunayTriangulation(perimeter1,C) ;
% Get the interior triangular elements
tf = isInterior(dt) ;
% get points and nodes
p = dt.Points ;
t = dt.ConnectivityList ;
% Pick the required
t(~tf,:) = [] ;
% Make deluanay again
dt = triangulation(t,p);
triplot(dt)
5 Comments
KSSV
on 7 Mar 2022
Using perimeter2 doesnot crash my MATLAB. You may consider using like shown below:
id = knnsearch(perimeter2,perimeter2) ;
C = [id(1:end-1) id(2:end)];
% Make delaunay triangulation with constriants
dt = delaunayTriangulation(perimeter2,C) ;
% Get the interior triangular elements
tf = isInterior(dt) ;
% get points and nodes
p = dt.Points ;
t = dt.ConnectivityList ;
% Pick the required
t(~tf,:) = [] ;
% Make deluanay again
dt = triangulation(t,p);
triplot(dt)
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