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| classdef maillage;
properties (SetAccess=public)
CrdNd;
Connex;
nbNd;
nbElt;
Aires;
segment;
end
methods;
function obj=maillage (n)
obj.CrdNd=rand (n,2);
obj.Connex=delaunay (obj.CrdNd(:,1),obj.CrdNd(:,2));
obj.nbNd=size (obj.CrdNd,1);
obj.nbElt=size (obj.Connex,1);
for e=1:obj.nbElt
N1=obj.Connex(e,1);
N2=obj.Connex(e,2);
N3=obj.Connex(e,3);
X1=obj.CrdNd(N1,1);
Y1=obj.CrdNd(N1,2);
X2=obj.CrdNd(N2,1);
Y2=obj.CrdNd(N2,2);
X3=obj.CrdNd(N3,1);
Y3=obj.CrdNd(N3,2);
obj.Aires(e)=1/2*abs ((X2-X1)*(Y3-Y1)-(X3-X1)*(Y2-Y1));
end
end
function obj=classer (obj)
list_aires=obj.Aires;
ordre=[1:obj.nbElt]';
for j=obj.nbElt:-1:2;
for i=1:j-1;
if list_aires (i)>list_aires (i+1);
k=list_aires (i+1);
list_aires (i+1)=list_aires (i);
list_aires (i)=k;
k=ordre (i+1);
ordre (i+1)=ordre (i);
ordre (i)=k;
end
end
end
obj.Aires=list_aires;
obj.Connex=obj.Connex(ordre,: );
end
function obj3=fusion (obj1,obj2)
obj3.CrdNd=[obj1.CrdNd;obj2.CrdNd];
obj3=maillage (obj1.nbNd+obj2.nbNd);
obj3.Aires=[];
obj3.Connex=delaunay (obj3.CrdNd(:,1),obj3.CrdNd(:,2));
obj3.nbNd=size (obj3.CrdNd,1);
obj3.nbElt=size (obj3.Connex,1);
for e=1:obj3.nbElt;
N1=obj3.Connex(e,1);
N2=obj3.Connex(e,2);
N3=obj3.Connex(e,3);
X1=obj3.CrdNd(N1,1);
Y1=obj3.CrdNd(N1,2);
X2=obj3.CrdNd(N2,1);
Y2=obj3.CrdNd(N2,2);
X3=obj3.CrdNd(N3,1);
Y3=obj3.CrdNd(N3,2);
obj3.Aires(e)=(1/2)*abs ((X2-X1)*(Y3-Y1)-(X3-X1)*(Y2-Y1));
end
end
function obj=afficher (obj)
figure
trimesh (obj.Connex,obj.CrdNd(:,1),obj.CrdNd(:,2))
for e=1:obj.nbElt;
N1=obj.Connex(e,1);
N2=obj.Connex(e,2);
N3=obj.Connex(e,3);
X1=obj.CrdNd(N1,1);
Y1=obj.CrdNd(N1,2);
X2=obj.CrdNd(N2,1);
Y2=obj.CrdNd(N2,2);
X3=obj.CrdNd(N3,1);
Y3=obj.CrdNd(N3,2);
B=[(X1+X2+X3)/3,(Y1+Y2+Y3)/3];
text (B (1,1),B (1,2),num2str (e));
end
end
function obj=noeuds_frontiere (obj)
for e=1:obj.nbElt;
N1=obj.Connex(e,1);
N2=obj.Connex(e,2);
N3=obj.Connex(e,3);
end
end
end
end |
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