/* Vis5D version 5.0 */ /* Vis5D system for visualizing five dimensional gridded data sets Copyright (C) 1990 - 1996 Bill Hibbard, Brian Paul, Dave Santek, and Andre Battaiola. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef V5D_H #define V5D_H #include /* * A numeric version number which we can test for in utility programs which * use the v5d functions. For example, we can do tests like this: * #if V5D_VERSION > 42 * do something * #else * do something else * #endif * * If V5D_VERSION is not defined, then its value is considered to be zero. */ #define V5D_VERSION 42 /* * Define our own 1 and 2-byte data types. We use these names to avoid * collisions with types defined by the OS include files. */ typedef unsigned char V5Dubyte; /* Must be 1 byte, except for cray */ typedef unsigned short V5Dushort; /* Must be 2 byte, except for cray */ #define MISSING 1.0e35 #define IS_MISSING(X) ( (X) >= 1.0e30 ) /* Limits on 5-D grid size: (must match those in v5df.h!!!) */ #define MAXVARS 30 #define MAXTIMES 400 #define MAXROWS 400 #define MAXCOLUMNS 800 #define MAXLEVELS 100 /************************************************************************/ /*** ***/ /*** Functions for writing v5d files. See README file for details. ***/ /*** These are the functions user's will want for writing file ***/ /*** converters, etc. ***/ /*** ***/ /************************************************************************/ extern int v5dCreateSimple(const char *name, int numtimes, int numvars, int nr, int nc, int nl, const char varname[MAXVARS][10], const int timestamp[], const int datestamp[], float northlat, float latinc, float westlon, float loninc, float bottomhgt, float hgtinc); extern int v5dCreate(const char *name, int numtimes, int numvars, int nr, int nc, const int nl[], const char varname[MAXVARS][10], const int timestamp[], const int datestamp[], int compressmode, int projection, const float proj_args[], int vertical, const float vert_args[]); extern int v5dWrite(int time, int var, const float data[]); extern int v5dClose(void); extern int v5dSetLowLev(int lowlev[]); extern int v5dSetUnits(int var, const char *units); /************************************************************************/ /*** ***/ /*** Definition of v5d struct and function prototypes. ***/ /*** These functions are used by vis5d and advanced v5d utilities. ***/ /*** ***/ /************************************************************************/ #define MAXPROJARGS 100 #define MAXVERTARGS (MAXLEVELS+1) /* * This struct describes the structure of a .v5d file. */ typedef struct { /* PUBLIC (user can freely read, sometimes write, these fields) */ int NumTimes; /* Number of time steps */ int NumVars; /* Number of variables */ int Nr; /* Number of rows */ int Nc; /* Number of columns */ int Nl[MAXVARS]; /* Number of levels per variable */ int LowLev[MAXVARS]; /* Lowest level per variable */ char VarName[MAXVARS][10]; /* 9-character variable names */ char Units[MAXVARS][20]; /* 19-character units for variables */ int TimeStamp[MAXTIMES]; /* Time in HHMMSS format */ int DateStamp[MAXTIMES]; /* Date in YYDDD format */ float MinVal[MAXVARS]; /* Minimum variable data values */ float MaxVal[MAXVARS]; /* Maximum variable data values */ /* This info is used for external function computation */ short McFile[MAXTIMES][MAXVARS]; /* McIDAS file number in 1..9999 */ short McGrid[MAXTIMES][MAXVARS]; /* McIDAS grid number in 1..? */ int VerticalSystem; /* Which vertical coordinate system */ float VertArgs[MAXVERTARGS]; /* Vert. Coord. Sys. arguments... */ /* IF VerticalSystem==0 THEN -- Linear scale, equally-spaced levels in generic units VertArgs[0] = Height of bottom-most grid level in generic units VertArgs[1] = Increment between levels in generic units ELSE IF VerticalSystem==1 THEN -- Linear scale, equally-spaced levels in km VertArgs[0] = Height of bottom grid level in km VertArgs[1] = Increment between levels in km ELSE IF VerticalSystem==2 THEN -- Linear scale, Unequally spaced levels in km VertArgs[0] = Height of grid level 0 (bottom) in km ... ... VertArgs[n] = Height of grid level n in km ELSE IF VerticalSystem==3 THEN -- Linear scale, Unequally spaced levels in mb VertArgs[0] = Pressure of grid level 0 (bottom) in mb ... ... VertArgs[n] = Pressure of grid level n in mb ENDIF */ int Projection; /* Which map projection */ float ProjArgs[MAXPROJARGS]; /* Map projection arguments... */ /* IF Projection==0 THEN -- Rectilinear grid, generic units ProjArgs[0] = North bound, Y coordinate of grid row 0 ProjArgs[1] = West bound, X coordiante of grid column 0 ProjArgs[2] = Increment between rows ProjArgs[3] = Increment between columns NOTES: X coordinates increase to the right, Y increase upward. NOTES: Coordinate system is right-handed. ELSE IF Projection==1 THEN -- Cylindrical equidistant (Old VIS-5D) -- Rectilinear grid in lat/lon ProjArgs[0] = Latitude of grid row 0, north bound, in degrees ProjArgs[1] = Longitude of grid column 0, west bound, in deg. ProjArgs[2] = Increment between rows in degrees ProjArgs[3] = Increment between rows in degrees NOTES: Coordinates (degrees) increase to the left and upward. ELSE IF Projection==2 THEN -- Lambert conformal ProjArgs[0] = Standared Latitude 1 of conic projection ProjArgs[1] = Standared Latitude 2 of conic projection ProjArgs[2] = Row of North/South pole ProjArgs[3] = Column of North/South pole ProjArgs[4] = Longitude which is parallel to columns ProjArgs[5] = Increment between grid columns in km ELSE IF Projection==3 THEN -- Polar Stereographic ProjArgs[0] = Latitude of center of projection ProjArgs[1] = Longitude of center of projection ProjArgs[2] = Grid row of center of projection ProjArgs[3] = Grid column of center of projection ProjArgs[4] = Increment between grid columns at center in km ELSE IF Projection==4 THEN -- Rotated ProjArgs[0] = Latitude on rotated globe of grid row 0 ProjArgs[1] = Longitude on rotated globe of grid column 0 ProjArgs[2] = Degrees of latitude on rotated globe between grid rows ProjArgs[3] = Degrees of longitude on rotated globe between grid columns ProjArgs[4] = Earth latitude of (0, 0) on rotated globe ProjArgs[5] = Earth longitude of (0, 0) on rotated globe ProjArgs[6] = Clockwise rotation of rotated globe in degrees ENDIF */ int CompressMode; /* 1, 2 or 4 = # bytes per grid point */ char FileVersion[10]; /* 9-character version number */ /* PRIVATE (not to be touched by user code) */ unsigned int FileFormat; /* COMP5D file version or 0 if .v5d */ int FileDesc; /* Unix file descriptor */ char Mode; /* 'r' = read, 'w' = write */ off_t CurPos; /* current position of file pointer */ off_t FirstGridPos; /* position of first grid in file */ off_t GridSize[MAXVARS]; /* size of each grid */ off_t SumGridSizes; /* sum of GridSize[0..NumVars-1] */ } v5dstruct; extern float pressure_to_height(float pressure); extern float height_to_pressure(float height); extern int v5dYYDDDtoDays(int yyddd); extern int v5dHHMMSStoSeconds(int hhmmss); extern int v5dDaysToYYDDD(int days); extern int v5dSecondsToHHMMSS(int seconds); extern void v5dPrintStruct(const v5dstruct * v); extern v5dstruct *v5dNewStruct(void); extern void v5dFreeStruct(v5dstruct * v); extern void v5dInitStruct(v5dstruct * v); extern int v5dVerifyStruct(const v5dstruct * v); extern void v5dCompressGrid(int nr, int nc, int nl, int compressmode, const float data[], void *compdata, float ga[], float gb[], float *minval, float *maxval); extern void v5dDecompressGrid(int nr, int nc, int nl, int compressmode, void *compdata, float ga[], float gb[], float data[]); extern int v5dSizeofGrid(const v5dstruct * v, int time, int var); extern v5dstruct *v5dOpenFile(const char *filename, v5dstruct * v); extern int v5dCreateFile(const char *filename, v5dstruct * v); extern v5dstruct *v5dUpdateFile(const char *filename, v5dstruct * v); extern int v5dCloseFile(v5dstruct * v); extern int v5dReadCompressedGrid(v5dstruct * v, int time, int var, float *ga, float *gb, void *compdata); extern int v5dReadGrid(v5dstruct * v, int time, int var, float data[]); extern int v5dWriteCompressedGrid(const v5dstruct * v, int time, int var, const float *ga, const float *gb, const void *compdata); extern int v5dWriteGrid(v5dstruct * v, int time, int var, const float data[]); #endif