/Proj4/PJ_wag3.c

http://github.com/route-me/route-me · C · 27 lines · 26 code · 1 blank · 0 comment · 1 complexity · 10c3870c9cbcfa60e7d8b463ecb755ec MD5 · raw file 

    

  1. #ifndef lint
    2. 

  2. static const char SCCSID[]="@(#)PJ_wag3.c	4.1	94/02/15	GIE	REL";
    3. 

  3. #endif
    4. 

  4. #define PROJ_PARMS__ \
    5. 

  5. 	double	C_x;
    6. 

  6. #define PJ_LIB__
    7. 

  7. # include	"projects.h"
    8. 

  8. PROJ_HEAD(wag3, "Wagner III") "\n\tPCyl., Sph.\n\tlat_ts=";
    9. 

  9. #define TWOTHIRD 0.6666666666666666666667
    10. 

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

  11. 	xy.x = P->C_x * lp.lam * cos(TWOTHIRD * lp.phi);
    12. 

  12. 	xy.y = lp.phi;
    13. 

  13. 	return (xy);
    14. 

  14. }
    15. 

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

  16. 	lp.phi = xy.y;
    17. 

  17. 	lp.lam = xy.x / (P->C_x * cos(TWOTHIRD * lp.phi));
    18. 

  18. 	return (lp);
    19. 

  19. }
    20. 

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

  21. ENTRY0(wag3)
    22. 

  22. 	double ts;
    23. 

  23. 

  24. 	ts = pj_param(P->params, "rlat_ts").f;
    25. 

  25. 	P->C_x = cos(ts) / cos(2.*ts/3.);
    26. 

  26. 	P->es = 0.; P->inv = s_inverse; P->fwd = s_forward;
    27. 

  27. ENDENTRY(P)
    28.