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cnh |
1.1 |
function csg=make_cs_segments_and_patches(csg) |
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% |
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% Add line segments and polygon patches to CS grid object. |
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% |
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clf |
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csg |
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xg=csg.gridarr(:,:,csg.xgpos); |
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yg=csg.gridarr(:,:,csg.ygpos); |
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iind=csg.index_i_center; |
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jind=csg.index_j_center; |
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clear xc yc; |
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nc=0; |
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np=0; |
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ng=csg.ng; |
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xcoord=cast(ones(2,ng*ng*6*4),class(xg)); |
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ycoord=cast(ones(2,ng*ng*6*4),class(xg)); |
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fprintf('Beginning segment calculation\n'); |
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for t=1:numel(csg.fx) |
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ilo=csg.ilog(t); |
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jlo=csg.jlog(t); |
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ihi=csg.ilog(t)+csg.fx(t); |
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jhi=csg.jlog(t)+csg.fy(t); |
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nlo=nc+1; |
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nhi=nc+(ihi-ilo)*(jhi-jlo)*4; |
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% Set i ,j -> i+1,j segment |
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r1=[ilo :ihi-1];r2=[jlo:jhi-1]; |
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r3=[ilo+1:ihi ];r4=[jlo:jhi-1]; |
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a=[xg(r1,r2)]; a=a(:); |
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b=[xg(r3,r4)]; b=b(:); |
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i1=find(a== 180 & b < 0); |
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i2=find(a==-180 & b > 0); |
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a(i1)= -180; |
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a(i2)= 180; |
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i3=find(b== 180 & a < 0); |
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i4=find(b==-180 & a > 0); |
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b(i3)= -180; |
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b(i4)= 180; |
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c=[yg(r1,r2)]; c=c(:); |
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d=[yg(r3,r4)]; d=d(:); |
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i1=find(c== 90 ); |
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i2=find(d== 90 ); |
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a(i1)=b(i1); |
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b(i2)=a(i2); |
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i1=find(c== -90 ); |
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i2=find(d== -90 ); |
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a(i1)=b(i1); |
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b(i2)=a(i2); |
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xcoord(1,nlo:4:nhi)=a; |
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xcoord(2,nlo:4:nhi)=b; |
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ycoord(1,nlo:4:nhi)=c; |
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ycoord(2,nlo:4:nhi)=d; |
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% Store associated index |
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ai=[iind(r1,r4)]; ai=ai(:); |
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bi=[jind(r1,r4)]; bi=bi(:); |
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xcoordi((nlo-1)/4+1:nhi/4)=ai; |
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ycoordi((nlo-1)/4+1:nhi/4)=bi; |
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% Set i+1,j -> i+1,j+1 segment |
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r1=[ilo+1:ihi ];r2=[jlo :jhi-1]; |
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r3=[ilo+1:ihi ];r4=[jlo+1:jhi ]; |
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a=[xg(r1,r2)]; a=a(:); |
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b=[xg(r3,r4)]; b=b(:); |
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i1=find(a== 180 & b < 0); |
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i2=find(a==-180 & b > 0); |
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a(i1)= -180; |
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a(i2)= 180; |
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i3=find(b== 180 & a < 0); |
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i4=find(b==-180 & a > 0); |
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b(i3)= -180; |
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b(i4)= 180; |
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c=[yg(r1,r2)]; c=c(:); |
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d=[yg(r3,r4)]; d=d(:); |
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i1=find(c== 90 ); |
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i2=find(d== 90 ); |
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a(i1)=b(i1); |
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b(i2)=a(i2); |
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i1=find(c== -90 ); |
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i2=find(d== -90 ); |
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a(i1)=b(i1); |
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b(i2)=a(i2); |
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xcoord(1,nlo+1:4:nhi+1)=a; |
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xcoord(2,nlo+1:4:nhi+1)=b; |
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ycoord(1,nlo+1:4:nhi+1)=c; |
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ycoord(2,nlo+1:4:nhi+1)=d; |
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% Set i+1,j+1 -> i ,j+1 segment |
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r1=[ilo+1:ihi ];r2=[jlo+1:jhi ]; |
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r3=[ilo :ihi-1];r4=[jlo+1:jhi ]; |
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a=[xg(r1,r2)]; a=a(:); |
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b=[xg(r3,r4)]; b=b(:); |
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i1=find(a== 180 & b < 0); |
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i2=find(a==-180 & b > 0); |
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a(i1)= -180; |
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a(i2)= 180; |
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i3=find(b== 180 & a < 0); |
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i4=find(b==-180 & a > 0); |
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b(i3)= -180; |
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b(i4)= 180; |
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c=[yg(r1,r2)]; c=c(:); |
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d=[yg(r3,r4)]; d=d(:); |
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i1=find(c== 90 ); |
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i2=find(d== 90 ); |
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a(i1)=b(i1); |
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b(i2)=a(i2); |
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i1=find(c== -90 ); |
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i2=find(d== -90 ); |
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a(i1)=b(i1); |
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b(i2)=a(i2); |
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xcoord(1,nlo+2:4:nhi+2)=a; |
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xcoord(2,nlo+2:4:nhi+2)=b; |
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ycoord(1,nlo+2:4:nhi+2)=c; |
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ycoord(2,nlo+2:4:nhi+2)=d; |
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% Set i ,j+1 -> i ,j segment |
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r1=[ilo :ihi-1];r2=[jlo+1:jhi ]; |
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r3=[ilo :ihi-1];r4=[jlo :jhi-1]; |
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a=[xg(r1,r2)]; a=a(:); |
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b=[xg(r3,r4)]; b=b(:); |
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i1=find(a== 180 & b < 0); |
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i2=find(a==-180 & b > 0); |
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a(i1)= -180; |
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a(i2)= 180; |
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i3=find(b== 180 & a < 0); |
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i4=find(b==-180 & a > 0); |
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b(i3)= -180; |
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b(i4)= 180; |
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c=[yg(r1,r2)]; c=c(:); |
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d=[yg(r3,r4)]; d=d(:); |
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i1=find(c== 90 ); |
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i2=find(d== 90 ); |
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a(i1)=b(i1); |
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b(i2)=a(i2); |
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i1=find(c== -90 ); |
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i2=find(d== -90 ); |
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a(i1)=b(i1); |
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b(i2)=a(i2); |
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xcoord(1,nlo+3:4:nhi+3)=a; |
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xcoord(2,nlo+3:4:nhi+3)=b; |
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ycoord(1,nlo+3:4:nhi+3)=c; |
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ycoord(2,nlo+3:4:nhi+3)=d; |
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nc=nc+(ihi-ilo)*(jhi-jlo)*4; |
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fprintf('Segment calculation for face %d\n',t); |
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end |
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csg.xcoord=xcoord; |
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csg.ycoord=ycoord; |
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px=cast(ones(5,nc/4),class(xcoord)); |
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py=cast(ones(5,nc/4),class(ycoord)); |
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r=1:4:nc; |
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px(1,:)=xcoord(1,r ); |
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px(2,:)=xcoord(2,r ); |
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px(3,:)=xcoord(2,r+1); |
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px(4,:)=xcoord(2,r+2); |
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px(5,:)=xcoord(2,r+3); |
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py(1,:)=ycoord(1,r ); |
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py(2,:)=ycoord(2,r ); |
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py(3,:)=ycoord(2,r+1); |
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py(4,:)=ycoord(2,r+2); |
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py(5,:)=ycoord(2,r+3); |
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% For any polygon with a negative longitude set longitude 180 |
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% to -180 where the polygon lonigtude is exactly 180. |
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[ r0, c0]=find(px< 0 ); |
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[r180,c180]=find(px==180); |
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[cfix,ia,ib]=intersect(c180,c0); |
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rfix=r180(ia); |
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foo=px(:,cfix); |
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foo(foo==180)=-180; |
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px(:,cfix)=foo; |
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% Set longitude to 0 for all points that are at the pole. |
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px(py== 90)=0; |
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px(py==-90)=0; |
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csg.px=px; |
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csg.py=py; |
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csg.xcoordi=xcoordi; |
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csg.ycoordi=ycoordi; |
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return |
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