8 lines
340 B
Mathematica
8 lines
340 B
Mathematica
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function J=Jacobi(ie,s,t,Elements,Nodes)
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ENodes = Elements(ie,:); %<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD>Ԫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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xe = Nodes(ENodes(:),:); %<EFBFBD><EFBFBD>ȡ<EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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x1=xe(1,1);y1=xe(1,2);
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x2=xe(2,1);y2=xe(2,2);
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x3=xe(3,1);y3=xe(3,2);
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x4=xe(4,1);y4=xe(4,2);
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J=1/4*[-(1+t) -(1-t) 1-t 1+t;1-s -(1-s) -(1+s) 1+s]*[x1 y1;x2 y2;x3 y3;x4 y4];
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