| 1 | ;------------------------------------------------------------ |
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| 2 | ;------------------------------------------------------------ |
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| 3 | ;------------------------------------------------------------ |
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| 4 | ; |
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| 5 | ; @file_comments add land points on a 2D land-sea mask |
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| 6 | ; |
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| 7 | ; @categories |
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| 8 | ; Grid |
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| 9 | ; |
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| 10 | ; @param TAB {in}{required} a 2D land-sea mask, with 1 on sea and 0 on land |
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| 11 | ; |
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| 12 | ; @keyword CELLSIZE |
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| 13 | ; size (in pixel) of the square |
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| 14 | ; representing one point of the mask |
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| 15 | ; |
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| 16 | ; @returns |
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| 17 | ; newmsk the new 2D land-sea mask |
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| 18 | ; |
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| 19 | ; @examples |
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| 20 | ; IDL> a = changemsk(tmask[*,*,0]) |
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| 21 | ; to add ocean points |
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| 22 | ; IDL> a = 1 - changemsk(1 - tmask[*,*,0]) |
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| 23 | ; |
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| 24 | ; @history |
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| 25 | ; Sebastien Masson (smasson\@lodyc.jussieu.fr) |
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| 26 | ; June 2006 |
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| 27 | ; |
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| 28 | ; @version |
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| 29 | ; $Id$ |
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| 30 | ; |
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| 31 | ;------------------------------------------------------------ |
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| 32 | ;------------------------------------------------------------ |
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| 33 | ;------------------------------------------------------------ |
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| 34 | function changemsk,tab, CELLSIZE = cellsize |
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| 35 | ; |
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| 36 | compile_opt idl2, strictarrsubs |
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| 37 | ; |
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| 38 | newmsk = -1 |
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| 39 | taille = size(tab) |
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| 40 | if taille[0] NE 2 then return, newmsk |
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| 41 | newmsk=byte(tab) |
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| 42 | if keyword_set(cellsize) THEN cellsize = long(cellsize) $ |
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| 43 | ELSE cellsize = long(2) |
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| 44 | window,xsize=taille[1]*cellsize,ysize=taille[2]*cellsize |
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| 45 | tvscl, congrid(newmsk, taille[1]*cellsize, taille[2]*cellsize) |
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| 46 | |
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| 47 | if NOT keyword_set(nouseinfos) then begin |
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| 48 | print, 'left button : use it twice to define the diagonal of the rectangle to be set to 0 (land)' |
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| 49 | print, 'middle button: put 0 (land) on the clicked point' |
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| 50 | print, 'right button : quit' |
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| 51 | endif |
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| 52 | |
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| 53 | cursor,x1,y1,/device, /up |
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| 54 | while (!mouse.button ne 4) do begin |
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| 55 | case !mouse.button of |
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| 56 | 0:return, newmsk |
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| 57 | 1:BEGIN |
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| 58 | cursor,x2,y2,/device, /up |
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| 59 | x = [x1, x2] |
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| 60 | x = x[sort(x)] |
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| 61 | x = round(x/cellsize) |
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| 62 | y = [y1, y2] |
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| 63 | y = y[sort(y)] |
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| 64 | y = round(y/cellsize) |
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| 65 | newmsk[x[0]:x[1], y[0]:y[1] ] = 0 |
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| 66 | tvscl, replicate(0,(x[1]-x[0]+1)*cellsize $ |
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| 67 | ,(y[1]-y[0]+1)*cellsize) $ |
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| 68 | ,x[0]*cellsize,y[0]*cellsize |
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| 69 | end |
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| 70 | 2:BEGIN |
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| 71 | x1 = round(x1/cellsize) |
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| 72 | y1 = round(y1/cellsize) |
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| 73 | newmsk[x1, y1] = 0 |
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| 74 | tvscl,replicate(0,cellsize,cellsize) $ |
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| 75 | ,x1*cellsize,y1*cellsize |
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| 76 | |
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| 77 | END |
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| 78 | ELSE: |
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| 79 | endcase |
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| 80 | cursor,x1,y1,/device, /up |
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| 81 | endwhile |
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| 82 | |
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| 83 | return, newmsk |
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| 84 | end |
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| 85 | |
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