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Annotation of researchv10no/cmd/map/libmap/mollweide.c, revision 1.1

1.1     ! root        1: #include "map.h"
        !             2: 
        !             3: static int
        !             4: Xmollweide(struct place *place, double *x, double *y)
        !             5: {
        !             6:        double z;
        !             7:        double w;
        !             8:        z = place->nlat.l;
        !             9:        if(fabs(z)<89.9*RAD)
        !            10:                do {    /*newton for 2z+sin2z=pi*sin(lat)*/
        !            11:                        w = (2*z+sin(2*z)-PI*place->nlat.s)/(2+2*cos(2*z));
        !            12:                        z -= w;
        !            13:                } while(fabs(w)>=.00001);
        !            14:        *y = sin(z);
        !            15:        *x = - (2/PI)*cos(z)*place->wlon.l;
        !            16:        return(1);
        !            17: }
        !            18: 
        !            19: proj
        !            20: mollweide(void)
        !            21: {
        !            22:        return(Xmollweide);
        !            23: }

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