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%----------------------------------------------------------------------- |
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% function lndmake |
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% read boundary element and node files and create land and island |
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% polygons |
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%----------------------------------------------------------------------- |
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function lndmake |
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%----------------------------------------------------------------------- |
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% Read boundary elements |
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% |
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!ls *.bel |
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filebel=input('Enter the name of the boundary element file: ','s'); |
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[x,y,bel,gridname]=read_bel(filebel); |
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% |
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% Outer land boundary |
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% |
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sea=find(bel(:,5)==2); |
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polygon=bel(1:sea(1)-1,2); |
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xp=x(polygon);yp=y(polygon); |
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% |
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xrange=max(xp)-min(xp);yrange=max(yp)-min(yp); |
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ni=length(xp)+1; xp(ni)=xp(1); yp(ni)=yp(1); |
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ni=length(xp)+1; xp(ni)=min(xp)-0.1*xrange; yp(ni)=yp(ni-1); |
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ni=length(xp)+1; xp(ni)=xp(ni-1); yp(ni)=max(yp)+0.1*yrange; |
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ni=length(xp)+1; xp(ni)=max(xp)+0.1*xrange; yp(ni)=yp(ni-1); |
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ni=length(xp)+1; xp(ni)=xp(ni-1); yp(ni)=min(yp)-0.1*yrange; |
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ni=length(xp)+1; xp(ni)=xp(1) -0.1*xrange; yp(ni)=yp(ni-1); |
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ni=length(xp)+1; xp(ni)=xp(1) -0.1*xrange; yp(ni)=yp(1); |
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% |
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figure; |
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whitebg('w'); |
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hp=plot(xp,yp,'b-'); |
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hold on |
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% |
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fnod=fopen([gridname,'.lnd'],'w'); |
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fbel=fopen([gridname,'.lbe'],'w'); |
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ione=1; |
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for i=1:length(xp)-1 |
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fprintf(fnod,'%i %f %f\n',i,xp(i),yp(i)); |
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fprintf(fbel,'%i %i %i\n',i,i,i+1); |
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end |
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i=length(xp); |
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fprintf(fnod,'%i %f %f\n',i,xp(i),yp(i)); |
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fprintf(fbel,'%i %i %i\n',i,i,ione); |
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% |
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% first island |
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% |
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clear polygon; |
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i1=sea(1); |
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i2=find(bel(:,3)==bel(i1,2)); |
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polygon=bel(i1:i2,2); |
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xp=x(polygon);yp=y(polygon); |
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hp=plot(xp,yp,'r-'); |
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% |
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ione=i+1; |
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for ii=1:length(xp)-1 |
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i=i+1; |
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fprintf(fnod,'%i %f %f\n',i,xp(ii),yp(ii)); |
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fprintf(fbel,'%i %i %i\n',i,i,i+1); |
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end |
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i=i+1; |
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fprintf(fnod,'%i %f %f\n',i,xp(length(xp)),yp(length(xp))); |
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fprintf(fbel,'%i %i %i\n',i,i,ione); |
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% |
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% remaining islands |
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% |
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while i2 < length(bel) |
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% |
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i1=i2+1; |
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i2=find(bel(:,3)==bel(i1,2)); |
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polygon=bel(i1:i2,2); |
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xp=x(polygon);yp=y(polygon); |
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hp=plot(xp,yp,'r-'); |
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% |
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ione=i+1; |
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for ii=1:length(xp)-1 |
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i=i+1; |
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fprintf(fnod,'%i %f %f\n',i,xp(ii),yp(ii)); |
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fprintf(fbel,'%i %i %i\n',i,i,i+1); |
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end |
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i=i+1; |
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fprintf(fnod,'%i %f %f\n',i,xp(length(xp)),yp(length(xp))); |
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fprintf(fbel,'%i %i %i\n',i,i,ione); |
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end |
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fclose(fnod); |
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fclose(fbel); |
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%----------------------------------------------------------------------- |
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%----------------------------------------------------------------------- |
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