[GRASS-user] grass wiki on RST troubleshooting

[Markus Neteler]

On Fri, Feb 27, 2009 at 9:17 PM, Maris Nartiss <maris.gis at gmail.com> wrote:
> Sorry for interuption, but I could not find place where in v.surf.rst
> MAXPOINTS is used for anything else than printing a warning. URL to
> line in SVN? If I'm correct, no need to recompile anything.

[neteler at localhost vector]$ grep MAXPOINTS v.*rst/* | grep define
v.surf.rst/surf.h:#define MAXPOINTS  400
v.vol.rst/surf.h:#define MAXPOINTS  700

grep MAXPOINTS v.*rst/* | grep '='
v.surf.rst/main.c:      KMAX2 = 2 * npmin;      /* was: KMAX2 =
MAXPOINTS; fixed by JH in 12/01 */
v.surf.rst/main.c:       KMAX2 = MAXPOINTS;
v.vol.rst/main.c:    KMAX2 = MAXPOINTS;
v.vol.rst/user1.c:    if (NPOINT > MAXPOINTS && KMIN <= KMAX) {
v.vol.rst/user1.c:    if (NPOINT < MAXPOINTS && KMAX != MAXPOINTS)

You see that MAXPOINTS is assigned to KMAX2 and
then used.

Here at Trento, we are currently trying to see how to
- either dynamically define MAXPOINTS/KMAX2
- or minimize the overhead while maximising MAXPOINTS.

The problem is:
grep malloc v.*rst/* | grep KMAX2
v.vol.rst/user2.c:      /*           if(!(point=(struct
point_3d*)G_malloc(sizeof(struct point_3d)*(KMAX2+1))))
v.vol.rst/user2.c:              if (!(b = (double
*)G_malloc(sizeof(double) * (KMAX2 + 2)))) {
v.vol.rst/user2.c:              if (!(w = (double
*)G_malloc(sizeof(double) * (KMAX2 + 1)))) {
v.vol.rst/user3.c:      if (!(w2 = (double *)G_malloc(sizeof(double) *
(KMAX2 + 1))))
v.vol.rst/user3.c:      if (!(wz2 = (double *)G_malloc(sizeof(double)
* (KMAX2 + 1))))
v.vol.rst/user3.c:      if (!(wz1 = (double *)G_malloc(sizeof(double)
* (KMAX2 + 1))))

The KMAX2 is directly linked to G_malloc() so that can cannot easily
set it to a high number.

More to be studied here...

Markus