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