diff options
Diffstat (limited to 'src/pj_internal.c')
| -rw-r--r-- | src/pj_internal.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/pj_internal.c b/src/pj_internal.c index deb0c054..6bb33d64 100644 --- a/src/pj_internal.c +++ b/src/pj_internal.c @@ -119,7 +119,14 @@ chained calls starting out with a call to its 3D interface. return proj_coord_error (); } - +/**************************************************************************************/ +int pj_has_inverse(PJ *P) { +/*************************************************************************************** +Check if a a PJ has an inverse. +***************************************************************************************/ + return ( (P->inverted && (P->fwd || P->fwd3d || P->fwd4d) ) || + ( P->inv || P->inv3d || P->inv4d) ); +} /* Move P to a new context - or to the default context if 0 is specified */ |