Return to simpleconic.c CVS log

Up to [Research Unix] / researchv10no / cmd / map / libmap

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

1.1     ! root        1: #include "map.h"
        !             2: 
        !             3: static double r0, a;
        !             4: 
        !             5: static int
        !             6: Xsimpleconic(struct place *place, double *x, double *y)
        !             7: {
        !             8:        double r = r0 - place->nlat.l;
        !             9:        double t = a*place->wlon.l;
        !            10:        *x = -r*sin(t);
        !            11:        *y = -r*cos(t);
        !            12:        return 1;
        !            13: }
        !            14: 
        !            15: proj
        !            16: simpleconic(double par0, double par1)
        !            17: {
        !            18:        struct coord lat0;
        !            19:        struct coord lat1;
        !            20:        deg2rad(par0,&lat0);
        !            21:        deg2rad(par1,&lat1);
        !            22:        if(fabs(lat0.l+lat1.l)<.01)
        !            23:                return rectangular(par0);
        !            24:        if(fabs(lat0.l-lat1.l)<.01) {
        !            25:                a = lat0.s/lat0.l;
        !            26:                r0 = lat0.c/lat0.s + lat0.l;
        !            27:        } else {
        !            28:                a = (lat1.c-lat0.c)/(lat0.l-lat1.l);
        !            29:                r0 = ((lat0.c+lat1.c)/a + lat1.l + lat0.l)/2;
        !            30:        }
        !            31:        return Xsimpleconic;
        !            32: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.