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Annotation of researchv10no/cmd/map/libmap/conic.c, revision 1.1.1.1

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

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