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72 lines
2.7 KiB
72 lines
2.7 KiB
function [ch_da]=interp_ch_da(a0,b0,c0)
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load Cda_components_largerange.mat aa bb cc...
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c11 c12 c13 c21 c22 c23 c31 c32 c33 c44 c55 c66
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ha = aa(2)-aa(1);
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hb = bb(2)-bb(1);
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hc = cc(2)-cc(1);
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ja=min(floor((a0-aa(1))/ha)+1,size(aa,2)-1);
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jb=min(floor((b0-bb(1))/hb)+1,size(bb,2)-1);
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jc=min(floor((c0-cc(1))/hc)+1,size(cc,2)-1);
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ja=max(ja,1);jb=max(jb,1);jc=max(jc,1);
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N=zeros(1,8);
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ch_da=zeros([12,size(a0)]);
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nz=size(a0,1);
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ny=size(a0,2);
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nx=size(a0,3);
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for iz=1:nz
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for iy=1:ny
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for ix=1:nx
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a=a0(iz,iy,ix);
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b=b0(iz,iy,ix);
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c=c0(iz,iy,ix);
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a00=aa(ja(iz,iy,ix));
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b00=bb(jb(iz,iy,ix));
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c00=cc(jc(iz,iy,ix));
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N(1)=(ha+a00-a)*(hb+b00-b)*(hc+c00-c)/(ha*hb*hc);
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N(2)=(a-a00)*(hb+b00-b)*(hc+c00-c)/(ha*hb*hc);
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N(3)=(ha+a00-a)*(b-b00)*(hc+c00-c)/(ha*hb*hc);
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N(4)=(a-a00)*(b-b00)*(hc+c00-c)/(ha*hb*hc);
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N(5)=(ha+a00-a)*(hb+b00-b)*(c-c00)/(ha*hb*hc);
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N(6)=(a-a00)*(hb+b00-b)*(c-c00)/(ha*hb*hc);
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N(7)=(ha+a00-a)*(b-b00)*(c-c00)/(ha*hb*hc);
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N(8)=(a-a00)*(b-b00)*(c-c00)/(ha*hb*hc);
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R=compR(c11,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(1,iz,iy,ix)=N*R;
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R=compR(c12,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(2,iz,iy,ix)=N*R;
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R=compR(c13,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(3,iz,iy,ix)=N*R;
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R=compR(c21,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(4,iz,iy,ix)=N*R;
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R=compR(c22,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(5,iz,iy,ix)=N*R;
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R=compR(c23,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(6,iz,iy,ix)=N*R;
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R=compR(c31,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(7,iz,iy,ix)=N*R;
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R=compR(c32,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(8,iz,iy,ix)=N*R;
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R=compR(c33,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(9,iz,iy,ix)=N*R;
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R=compR(c44,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(10,iz,iy,ix)=N*R;
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R=compR(c55,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(11,iz,iy,ix)=N*R;
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R=compR(c66,ja(iz,iy,ix),jb(iz,iy,ix),jc(iz,iy,ix));
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ch_da(12,iz,iy,ix)=N*R;
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end
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end
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end
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end
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function R=compR(c,aj,bj,cj)
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R=zeros(8,1);
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R(1)=c(aj,bj,cj);
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R(2)=c(aj+1,bj,cj);
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R(3)=c(aj,bj+1,cj);
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R(4)=c(aj+1,bj+1,cj);
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R(5)=c(aj,bj,cj+1);
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R(6)=c(aj+1,bj,cj+1);
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R(7)=c(aj,bj+1,cj+1);
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R(8)=c(aj+1,bj+1,cj+1);
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end
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