1 #ifndef DUNE_RT02DLOCALINTERPOLATION_HH
2 #define DUNE_RT02DLOCALINTERPOLATION_HH
6 #include <dune/common/exceptions.hh>
18 sign0 = sign1 = sign2 = 1.0;
24 sign0 = sign1 = sign2 = 1.0;
25 if (s&1) sign0 *= -1.0;
26 if (s&2) sign1 *= -1.0;
27 if (s&4) sign2 *= -1.0;
28 m0[0] = 0.5; m0[1] = 0.0;
29 m1[0] = 0.0; m1[1] = 0.5;
30 m2[0] = 0.5; m2[1] = 0.5;
31 n0[0] = 0.0; n0[1] = -1.0;
32 n1[0] = -1.0; n1[1] = 0.0;
33 n2[0] = 1.0/sqrt(2.0); n2[1] = 1.0/sqrt(2.0);
34 c0 = ( 0.5*n0[0] - 1.0*n0[1]);
35 c1 = (-1.0*n1[0] + 0.5*n1[1]);
36 c2 = ( 0.5*n2[0] + 0.5*n2[1]);
39 template<
typename F,
typename C>
43 typename F::Traits::RangeType y;
47 f.evaluate(m0,y); out[0] = (y[0]*n0[0]+y[1]*n0[1])*sign0/c0;
48 f.evaluate(m1,y); out[1] = (y[0]*n1[0]+y[1]*n1[1])*sign1/c1;
49 f.evaluate(m2,y); out[2] = (y[0]*n2[0]+y[1]*n2[1])*sign2/c2;
53 typename LB::Traits::RangeFieldType sign0,sign1,sign2;
54 typename LB::Traits::DomainType m0,m1,m2;
55 typename LB::Traits::DomainType n0,n1,n2;
56 typename LB::Traits::RangeFieldType c0,c1,c2;