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Annotation of researchv8dc/cmd/map/libmap/conic.c, revision 1.1.1.1

1.1       root        1: #include "map.h"
                      2: 
                      3: struct coord stdpar;
                      4: 
                      5: Xconic(place, x, y)
                      6: struct place *place;
                      7: float *x, *y;
                      8: {
                      9:        float r;
                     10:        if(fabs(place->nlat.l-stdpar.l) > 80.*RAD)
                     11:                return(-1);
                     12:        r = stdpar.c/stdpar.s - tan(place->nlat.l - stdpar.l);
                     13:        *x = - r*sin(place->wlon.l * stdpar.s);
                     14:        *y = - r*cos(place->wlon.l * stdpar.s);
                     15:        if(r>3) return(0);
                     16:        return(1);
                     17: }
                     18: 
                     19: int (*conic(par))()
                     20: float par;
                     21: {
                     22:        extern Xcylindrical();
                     23:        if(fabs(par) <.1)
                     24:                return(Xcylindrical);
                     25:        deg2rad(par, &stdpar);
                     26:        return(Xconic);
                     27: }

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