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Last change
on this file since 68 was
68,
checked in by cbipsl, 14 years ago
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commit v1 eccad
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Property svn:eol-style set to
native
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Property svn:executable set to
*
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File size:
839 bytes
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| 1 | #ifndef GRILLE_H_ |
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| 2 | #define GRID_H_ |
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| 3 | |
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| 4 | |
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| 5 | typedef struct { |
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| 6 | int width; |
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| 7 | int height; |
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| 8 | int *datas; |
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| 9 | }Grid, *ptrGrid; |
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| 10 | |
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| 11 | /* structure d'une zone geographique */ |
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| 12 | typedef struct{ |
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| 13 | float lonMin; |
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| 14 | float lonMax; |
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| 15 | float latMin; |
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| 16 | float latMax; |
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| 17 | }Zone, *ptrZone; |
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| 18 | |
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| 19 | #define lat2y(zone, lat)\ |
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| 20 | (float)((zone->latMax - (lat)) / (zone->latMax - zone->latMin)) |
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| 21 | #define lon2x(zone, lon)\ |
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| 22 | (float)(((lon) - zone->lonMin) / (zone->lonMax - zone->lonMin)) |
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| 23 | |
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| 24 | /* conversions 0-1 -> grille */ |
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| 25 | #define x2i(x, grid) ((int)( (float)(x) * (float)((grid)->width -1) )) |
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| 26 | #define y2j(y, grid) ((int)( (float)(y) * (float)((grid)->height -1) )) |
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| 27 | #define i2x(i, grid) (((float)(i) + 0.5) / (float)((grid)->width -1)) |
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| 28 | #define j2y(j, grid) (((float)(j) + 0.5) / (float)((grid)->height -1)) |
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| 29 | |
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| 30 | ptrGrid allocGrid(ind width, int height); |
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| 31 | voi freeGrid(wptrGrid); |
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| 32 | #endif //GRID_H_ |
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