How to combine multiple surfaces and extract data points (faces and vertices ) as one surface?

14 views (last 30 days)
I have 5 surfaces in one file as a (5x1 struct with 2 fields) format, as attached. each one is made of Points(vertices) and ConnectivityList (faces). I was able to trisurf them using for loop as shown in my code. What I want is to combine them as one surface(1x1 struct with 2 fields) which has only one field of Points and only one field of ConnectivityList. so I can trisurf it and deal with it as on surface without for loop.
Thank you so much
SurfaceN.vertices=[];
SurfaceN.faces=[];
for N=1:length(Surfaces);
SurfaceN.vertices=Surfaces(N).Points;
SurfaceN.faces=Surfaces(N).ConnectivityList;
S=SurfaceN;trisurf(S.faces, S.vertices(:,1),S.vertices(:,2),S.vertices(:,3),'FaceAlpha', 0.5, 'FaceColor', 'r');
hold on
end
The 5 surfaces:
The 5 surfaces using trisurf with for loop

Accepted Answer

KSSV
KSSV on 27 Oct 2017
Edited: KSSV on 2 Nov 2017
load surfaces.mat ;
coor = cell(5,1) ;
for N=1:length(Surfaces)
S.vertices=Surfaces(N).Points;
S.faces=Surfaces(N).ConnectivityList;
coor{N} = S.vertices ;
trisurf(S.faces, S.vertices(:,1),S.vertices(:,2),S.vertices(:,3),'FaceAlpha', 0.5, 'FaceColor', 'r');
hold on
end
coor = cell2mat(coor) ;
coor = unique(coor,'rows') ;
%
dt = delaunayTriangulation(coor(:,1),coor(:,2)) ;
x = dt.Points(:,1) ;
y = dt.Points(:,2) ;
%
idx = knnsearch(coor(:,1:2),[x,y]) ;
z = coor(idx,3) ;
tri = dt.ConnectivityList ;
figure
trisurf(tri,x,y,z)
  4 Comments

Sign in to comment.

More Answers (0)

Categories

Find more on Bounding Regions in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!