Introduce geodetic-geocentric conversions ... (#669)

* Introduce geodetic-geocentric conversions, as PJ_xxx style conversion step and as API entry points

* minor improvements and minor bug squashing

1 files changed, 5 insertions, 3 deletions

diff --git a/src/proj.h b/src/proj.h
index cb689621..e2ca6bea 100644
--- a/src/proj.h
+++ b/src/proj.h
@@ -370,8 +370,7 @@ int proj_angular_output (PJ *P, enum PJ_DIRECTION dir);
 
 
 PJ_COORD proj_trans (PJ *P, PJ_DIRECTION direction, PJ_COORD coord);
-
-
+int proj_trans_array (PJ *P, PJ_DIRECTION direction, size_t n, PJ_COORD *coord);
 size_t proj_trans_generic (
     PJ *P,
     PJ_DIRECTION direction,
@@ -381,7 +380,7 @@ size_t proj_trans_generic (
     double *t, size_t st, size_t nt
 );
 
-int proj_trans_array (PJ *P, PJ_DIRECTION direction, size_t n, PJ_COORD *coord);
+
 
 /* Initializers */
 PJ_COORD proj_coord (double x, double y, double z, double t);
@@ -431,6 +430,9 @@ const PJ_PRIME_MERIDIANS  *proj_list_prime_meridians(void);
 double proj_torad (double angle_in_degrees);
 double proj_todeg (double angle_in_radians);
 
+/* Geographical to geocentric latitude - another of the "simple, but useful" */
+PJ_COORD proj_geoc_lat (const PJ *P, PJ_DIRECTION direction, PJ_COORD coo);
+
 double proj_dmstor(const char *is, char **rs);
 char*  proj_rtodms(char *s, double r, int pos, int neg);