/Proj4/PJ_eck5.c

http://github.com/route-me/route-me · C · 21 lines · 21 code · 0 blank · 0 comment · 1 complexity · acb10b11f42b198522a862d9e3f5ee03 MD5 · raw file 

    

  1. #ifndef lint
    2. 

  2. static const char SCCSID[]="@(#)PJ_eck5.c	4.1 94/02/15     GIE     REL";
    3. 

  3. #endif
    4. 

  4. #define PJ_LIB__
    5. 

  5. # include	"projects.h"
    6. 

  6. PROJ_HEAD(eck5, "Eckert V") "\n\tPCyl, Sph.";
    7. 

  7. #define XF	0.44101277172455148219
    8. 

  8. #define RXF	2.26750802723822639137
    9. 

  9. #define YF	0.88202554344910296438
    10. 

  10. #define RYF	1.13375401361911319568
    11. 

  11. FORWARD(s_forward); /* spheroid */
    12. 

  12. 	xy.x = XF * (1. + cos(lp.phi)) * lp.lam;
    13. 

  13. 	xy.y = YF * lp.phi;
    14. 

  14. 	return (xy);
    15. 

  15. }
    16. 

  16. INVERSE(s_inverse); /* spheroid */
    17. 

  17. 	lp.lam = RXF * xy.x / (1. + cos( lp.phi = RYF * xy.y));
    18. 

  18. 	return (lp);
    19. 

  19. }
    20. 

  20. FREEUP; if (P) pj_dalloc(P); }
    21. 

  21. ENTRY0(eck5); P->es = 0.; P->inv = s_inverse; P->fwd = s_forward; ENDENTRY(P)
    22.