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cnh |
1.1 |
function csg_obj=load_cs_grid(nr,nb,ng,gdir) |
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% |
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% Plot cube sphere grid lines |
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% e.g. load_cs_grid( 32, 32, 32,'float64'); |
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% e.g. load_cs_grid(510,510,510,'float64'); |
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% |
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% Set cartesian/unstructure list toplogy size |
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csg_obj.nx=0; |
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csg_obj.ny=0; |
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% Set cube topology size. |
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csg_obj.nr=nr; |
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csg_obj.nb=nb; |
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csg_obj.ng=ng; |
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% Set format used to read grid variables |
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% Input if 64-bit floats. The store in memory as 32-bit floats option below |
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% can be used to save memory when working with large grids. |
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gvfmt='float64'; |
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gvprec='double'; |
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gvfmt='float64=>float32'; |
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gvprec='single'; |
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% Calculate cube face sizes |
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csg_obj.fx=zeros(6,1); |
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csg_obj.fy=zeros(6,1); |
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for i=1:6 |
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if i == 1 |
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csg_obj.fx(i)=nb; csg_obj.fy(i)=ng; |
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end |
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if i == 2 |
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csg_obj.fx(i)=nr; csg_obj.fy(i)=ng; |
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end |
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if i == 3 |
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csg_obj.fx(i)=nr; csg_obj.fy(i)=nb; |
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end |
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if i == 4 |
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csg_obj.fx(i)=ng; csg_obj.fy(i)=nb; |
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end |
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if i == 5 |
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csg_obj.fx(i)=ng; csg_obj.fy(i)=nr; |
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end |
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if i == 6 |
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csg_obj.fx(i)=nb; csg_obj.fy(i)=nr; |
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end |
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end |
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% Read in physical grid information |
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% This comes from the 6 tile files which hold |
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% sixteen terms |
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% XC , YC , DXF, DYF, RA , XG , YG , DXV, |
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% DYU, RAZ, DXC, DYC, RAW, RAS, DXG, DYG |
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% that define the grid as follows: |
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% XC - Cell center longitude |
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% YC - Cell center latitude |
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% DXF - Cell face spacing in local X direction in meters and |
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% passing through the cell center. |
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% DYF - |
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xcpos=1; ycpos=2; dxfpos=3; dyfpos=4; |
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rapos=5; xgpos=6; ygpos=7; dxvpos=8; |
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dyupos=9; razpos=10; dxcpos=11; dycpos=12; |
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rawpos=13; raspos=14; dxgpos=15; dygpos=16; |
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csg_obj.xcpos = xcpos; |
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csg_obj.ycpos = ycpos; |
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csg_obj.dxfpos = dxfpos; |
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csg_obj.dyfpos = dyfpos; |
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csg_obj.rapos = rapos; |
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csg_obj.xgpos = xgpos; |
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csg_obj.ygpos = ygpos; |
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csg_obj.dxvpos = dxvpos; |
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csg_obj.dyupos = dyupos; |
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csg_obj.razpos = razpos; |
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csg_obj.dxcpos = dxcpos; |
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csg_obj.dycpos = dycpos; |
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csg_obj.rawpos = rawpos; |
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csg_obj.raspos = raspos; |
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csg_obj.dxgpos = dxgpos; |
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csg_obj.dygpos = dygpos; |
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% Each term is a set grid terms for each cube face for a |
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% total of |
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% (nb+1)*(ng+1)*2+(nr+1)*(ng+1)*2+(nr+1)*(nb+1)*2 |
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% points |
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% 1 - create a dummy 2d array to hold the terms |
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nxd=nb+1+nr+1+ng+1+nb+1; |
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nyd=ng+1+nb+1+nr+1; |
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csg_obj.gridarr=cast(ones(nxd,nyd,16)*12345.6789,gvprec); |
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mask_val=csg_obj.gridarr(1,1,1); |
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% 1- Read tile*.mitgrid |
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% holds terms for cube face 1, size (nb+1)*(ng+1) |
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for i= 1:6 |
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fx=csg_obj.fx(i); |
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fy=csg_obj.fy(i); |
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if i == 1 |
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csg_obj.ilog(1)=1;csg_obj.jlog(1)=1; |
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end |
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if i == 2 |
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csg_obj.ilog(2)=csg_obj.ilog(1)+fx+1; |
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csg_obj.jlog(2)=1; |
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end |
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if i == 3 |
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csg_obj.ilog(3)=csg_obj.ilog(1)+fx+1; |
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csg_obj.jlog(3)=csg_obj.jlog(1)+fy+1; |
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end |
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if i == 4 |
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csg_obj.ilog(4)=csg_obj.ilog(3)+fx+1; |
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csg_obj.jlog(4)=csg_obj.jlog(1)+fy+1; |
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end |
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if i == 5 |
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csg_obj.ilog(5)=csg_obj.ilog(3)+fx+1; |
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csg_obj.jlog(5)=csg_obj.jlog(4)+fy+1; |
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end |
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if i == 6 |
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csg_obj.ilog(6)=csg_obj.ilog(5)+fx+1; |
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csg_obj.jlog(6)=csg_obj.jlog(4)+fx+1; |
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end |
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ilog=csg_obj.ilog(i); |
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jlog=csg_obj.jlog(i); |
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ihi=ilog+fx;jhi=jlog+fy; |
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fnam=sprintf('%s/tile%3.3d.mitgrid',gdir,i); |
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fid=fopen(fnam,'r','ieee-be'); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,xcpos )=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,ycpos )=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,dxfpos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,dyfpos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,rapos )=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,xgpos )=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,ygpos )=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,dxvpos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,dyupos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,razpos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,dxcpos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,dycpos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,rawpos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,raspos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,dxgpos)=reshape(tmp,[(fx+1) (fy+1)]); |
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tmp=fread(fid,(fx+1)*(fy+1),gvfmt); |
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csg_obj.gridarr(ilog:ihi,jlog:jhi,dygpos)=reshape(tmp,[(fx+1) (fy+1)]); |
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fclose(fid); |
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csg_obj.index_i_center(ilog:ihi,jlog:jhi)=cast(repmat([ilog:ihi]',1,jhi-jlog+1),'int32'); |
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csg_obj.index_j_center(ilog:ihi,jlog:jhi)=cast(repmat([jlog:jhi] ,ihi-ilog+1,1),'int32'); |
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csg_obj.face_center(ilog:ihi,jlog:jhi)=cast(i,'int32'); |
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end |
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csg_obj.gridarr(csg_obj.gridarr==mask_val)=NaN; |
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csg_obj.active_mask=csg_obj.gridarr(:,:,1)*0.+1; |
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return |
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