How to generate Q4 element mesh in selected area?
2 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Hi,
I have a region ( variable 'nmask' in the .MAT file) on which I want to generate a Q4 mesh. In my current implementation, the nodes are not falling perfectly on the boundary of the region. Figure below should explain it further where red markers show the location of the nodes. Following code was used to generate these:
%load(data.mat)
tx = mfc:subset:mlc;
ty = mfr:subset:mlr;
[TX,TY] = meshgrid(tx,ty);
nodeDetails = [(1:size(TX,1)*size(TX,2))', TY(:),TX(:)];
%Connectivity Matrix
c = 0;
conect = zeros((size(TX,1)-1)*(size(TX,2)-1),4);
for j = 0:(size(TX,2)-2)
for i = 1: size(TX,1)-1
c = c + 1;
ii = j*(size(TX,1)) + i;
conect(c,:) = [ii, ii + 1, ii + size(TX,1) + 1, ii + size(TX,1)];
end
end
I am only interested in the white region. How can I also discard the other points?
0 Commenti
Risposta accettata
darova
il 8 Set 2021
What about this?
x = [-10:-8 -7:7 8:10];
y = [-8:-6 -5:5 6:8];
[X,Y] = meshgrid(x,y);
i1 = -8<X & X<8 & -6<Y & Y<6; % inside region
i2 = X<0 & abs(Y)<2; % small hole right side
ind = i1 | i2;
Z = X*0;
Z(ind) = nan; % remove inside part
plot(X(:),Y(:),'.r') % whole mesh
surface(X,Y,Z)
view(45,45)
0 Commenti
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Creating and Concatenating Matrices in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!