1 !----------------------------------------------------------------------- 2 subroutine buildmats(qref,qweight,interp,grad) 3 integer p,q,d 4 parameter(p=6) 5 parameter(q=4) 6 parameter(d=2) 7 8 real*8 qref(d*q) 9 real*8 qweight(q) 10 real*8 interp(p*q) 11 real*8 grad(d*p*q) 12 real*8 x1,x2 13 14 qref=(/2.d-1,6.d-1,1.d0/3.d0,2.d-1,2.d-1,2.d-1,1.d0/3.d0,6.d-1/) 15 qweight=(/25.d0/96.d0,25.d0/96.d0,-27.d0/96.d0,25.d0/96.d0/) 16 17 do i=0,q-1 18 x1 = qref(0*q+i+1) 19 x2 = qref(1*q+i+1); 20 ! Interp 21 interp(i*P+1)=2.*(x1+x2-1.)*(x1+x2-1./2.); 22 interp(i*P+2)=-4.*x1*(x1+x2-1.); 23 interp(i*P+3)=2.*x1*(x1-1./2.); 24 interp(i*P+4)=-4.*x2*(x1+x2-1.); 25 interp(i*P+5)=4.*x1*x2; 26 interp(i*P+6)=2.*x2*(x2-1./2.); 27 ! Grad 28 grad((i+0)*P+1)=2.*(1.*(x1+x2-1./2.)+(x1+x2-1.)*1.); 29 grad((i+Q)*P+1)=2.*(1.*(x1+x2-1./2.)+(x1+x2-1.)*1.); 30 grad((i+0)*P+2)=-4.*(1.*(x1+x2-1.)+x1*1.); 31 grad((i+Q)*P+2)=-4.*(x1*1.); 32 grad((i+0)*P+3)=2.*(1.*(x1-1./2.)+x1*1.); 33 grad((i+Q)*P+3)=2.*0.; 34 grad((i+0)*P+4)=-4.*(x2*1.); 35 grad((i+Q)*P+4)=-4.*(1.*(x1+x2-1.)+x2*1.); 36 grad((i+0)*P+5)=4.*(1.*x2); 37 grad((i+Q)*P+5)=4.*(x1*1.); 38 grad((i+0)*P+6)=2.*0.; 39 grad((i+Q)*P+6)=2.*(1.*(x2-1./2.)+x2*1.); 40 enddo 41 42 end 43 !----------------------------------------------------------------------- 44