Hamish wrote:
> I am trying to add this as "g.region -n" now, some questions:
>
> 1) local_proto.h: what's next in this series:
> #define PRINT_REG 0x01
> #define PRINT_SH 0x02
> #define PRINT_LL 0x04
> #define PRINT_EXTENT 0x08
> #define PRINT_CENTER 0x10
> #define PRINT_METERS 0x20
> #define PRINT_3D 0x40
> #define PRINT_MBBOX 0x80
>
> #define PRINT_NANGLE 0x ???
#define PRINT_NANGLE 0x100
> 2) #include <projects.h> to get LP, FACTOR, and pj_factors() ?
Yes.
> 3) The compiler complains that arg 2 of pj_factors(, oproj.pj,) is of
> an incompatible pointer type. If I make it *oproj.pj it doesn't complain
> but the output fact.conv is always 0.00000.
This is a bug in GRASS' gprojects.h. It uses projPJ* where it should
use projPJ. projPJ is already a pointer:
#if !defined(PROJECTS_H)
...
typedef void *projPJ;
...
#else
...
typedef PJ *projPJ;
...
#endif
I've applied this in 7.0:
--- include/gprojects.h (revision 33947)
+++ include/gprojects.h (working copy)
@@ -32,7 +32,7 @@
struct pj_info
{
- projPJ *pj;
+ projPJ pj;
double meters;
int zone;
char proj[100];
It doesn't result in a warning in GRASS because PROJECTS_H isn't
defined, so the void* version is used, and implicit casts to/from
void* never generate a warning.
Your code should be using oproj.pj, not *oproj.pj.
--
Glynn Clements <[EMAIL PROTECTED]>
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