/Proj4/PJ_putp3.c

http://github.com/route-me/route-me · C · 29 lines · 29 code · 0 blank · 0 comment · 1 complexity · db7326986ce784e9386f51e52ab8e92a MD5 · raw file 

    

  1. #ifndef lint
    2. 

  2. static const char SCCSID[]="@(#)PJ_putp3.c	4.1	94/02/15	GIE	REL";
    3. 

  3. #endif
    4. 

  4. #define PROJ_PARMS__ \
    5. 

  5. 	double	A;
    6. 

  6. #define PJ_LIB__
    7. 

  7. # include	"projects.h"
    8. 

  8. PROJ_HEAD(putp3, "Putnins P3") "\n\tPCyl., Sph.";
    9. 

  9. PROJ_HEAD(putp3p, "Putnins P3'") "\n\tPCyl., no inv., Sph.";
    10. 

  10. #define C	0.79788456
    11. 

  11. #define RPISQ	0.1013211836
    12. 

  12. FORWARD(s_forward); /* spheroid */
    13. 

  13. 	xy.x = C * lp.lam * (1. - P->A * lp.phi * lp.phi);
    14. 

  14. 	xy.y = C * lp.phi;
    15. 

  15. 	return (xy);
    16. 

  16. }
    17. 

  17. INVERSE(s_inverse); /* spheroid */
    18. 

  18. 	lp.phi = xy.y / C;
    19. 

  19. 	lp.lam = xy.x / (C * (1. - P->A * lp.phi * lp.phi));
    20. 

  20. 	return (lp);
    21. 

  21. }
    22. 

  22. FREEUP; if (P) pj_dalloc(P); }
    23. 

  23. 	static PJ *
    24. 

  24. setup(PJ *P) {
    25. 

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

  26. 	return P;
    27. 

  27. }
    28. 

  28. ENTRY0(putp3)  P->A = 4. * RPISQ; ENDENTRY(setup(P))
    29. 

  29. ENTRY0(putp3p) P->A = 2. * RPISQ; ENDENTRY(setup(P))
    30.