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dino.celebic 2025-11-11 15:50:51 +01:00
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ex3/seq/generate_mesh/chip_2materials.asv Normal file
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% Square:
% flatpak run org.octave.Octave <filename>
% or
% octave --no-window-system --no-gui -qf <filename>
clear all
clc
% %% L-shape
% g=[2 0 2 0 0 1 0; % #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
% 2 2 2 0 1 1 0;
% 2 2 1 1 0.5 1 0;
% 2 1 1 0.5 2 1 0;
% 2 1 0 2 2 1 0;
% 2 0 0 2 0 1 0]';
%% square
% g=[2 0 1 0 0 1 0; % #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
% 2 1 1 0 1 1 0;
% 2 1 0 1 1 1 0;
% 2 0 0 1 0 1 0]';
g=[2 0.00 1.00 0.00 0.00 1 0; % #vertices,v_1x, v_2x, v_1y, v_2y, subdomain_left, subdomain_right
2 1.00 1.00 0.00 0.60 1 0;
2 1.00 0.83 0.60 0.60 1 0;
2 0.83 0.17 0.60 0.60 1 2;
2 0.17 0.00 0.60 0.60 1 0;
2 0.00 0.00 0.60 0.00 1 0;
2 0.83 0.83 0.60 0.80 2 0;
2 0.83 0.17 0.80 0.80 2 0;
2 0.17 0.17 0.80 0.60 2 0;
2
]';
[p,e,t] = initmesh(g,'hmax',0.1);
%[p,e,t] = initmesh(g,'hmax',0.6);
pdemesh(p,e,t)
% pdemesh(p,e,t,"NodeLabels","on")
%% GH
% output from <https://de.mathworks.com/help/pde/ug/initmesh.html initmesh>
%
% coordinates p: [2][nnode]
% connectivity t: [4][nelem] with t(4,:) are the subdomain numbers
% edges e: [7][nedges] boundary edges
% e([1,2],:) - start/end vertex of edge
% e([3,4],:) - start/end values
% e(5,:) - segment number
% e([6,7],:) - left/right subdomain
ascii_write_mesh( p, t, e, mfilename);
% tmp=t(1:3,:)