/* GTS - Library for the manipulation of triangulated surfaces
* Copyright (C) 1999 Stéphane Popinet
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <math.h>
#include "config.h"
#ifdef HAVE_GETOPT_H
# include <getopt.h>
#endif /* HAVE_GETOPT_H */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include "gts.h"
#ifndef PI
#define PI 3.14159265359
#endif
typedef enum { NUMBER, COST } StopOptions;
typedef enum { COST_LENGTH, COST_OPTIMIZED, COST_ANGLE } CostOptions;
typedef enum { MIDVERTEX, OPTIMIZED } MidvertexOptions;
static gboolean stop_number_verbose (gdouble cost, guint number, guint * min)
{
static guint nmax = 0, nold = 0;
static GTimer * timer = NULL, * total_timer = NULL;
g_return_val_if_fail (min != NULL, TRUE);
if (timer == NULL) {
nmax = nold = number;
timer = g_timer_new ();
total_timer = g_timer_new ();
g_timer_start (total_timer);
}
if (number != nold && number % 121 == 0 &&
number < nmax && nmax > *min) {
gdouble total_elapsed = g_timer_elapsed (total_timer, NULL);
gdouble remaining;
gdouble hours, mins, secs;
gdouble hours1, mins1, secs1;
g_timer_stop (timer);
hours = floor (total_elapsed/3600.);
mins = floor ((total_elapsed - 3600.*hours)/60.);
secs = floor (total_elapsed - 3600.*hours - 60.*mins);
remaining = total_elapsed*((nmax - *min)/(gdouble) (nmax - number) - 1.);
hours1 = floor (remaining/3600.);
mins1 = floor ((remaining - 3600.*hours1)/60.);
secs1 = floor (remaining - 3600.*hours1 - 60.*mins1);
fprintf (stderr,
"\rEdges: %10u %3.0f%% %6.0f edges/s "
"Elapsed: %02.0f:%02.0f:%02.0f "
"Remaining: %02.0f:%02.0f:%02.0f ",
number,
100.*(nmax - number)/(nmax - *min),
(nold - number)/g_timer_elapsed (timer, NULL),
hours, mins, secs,
hours1, mins1, secs1);
fflush (stderr);
nold = number;
g_timer_start (timer);
}
if (number < *min) {
g_timer_destroy (timer);
g_timer_destroy (total_timer);
return TRUE;
}
return FALSE;
}
static gboolean stop_cost_verbose (gdouble cost, guint number, gdouble * max)
{
g_return_val_if_fail (max != NULL, TRUE);
if (number % 121 == 0) {
fprintf (stderr, "\rEdges: %10u Cost: %10g ", number, cost);
fflush (stderr);
}
if (cost > *max)
return TRUE;
return FALSE;
}
static gboolean stop_log_cost (gdouble cost, guint number)
{
fprintf (stderr, "%d %g\n", number, cost);
return FALSE;
}
static gdouble cost_angle (GtsEdge * e)
{
if (e->triangles && e->triangles->next)
return fabs (gts_triangles_angle (e->triangles->data,
e->triangles->next->data));
return G_MAXDOUBLE;
}
/* coarsen - produce a coarsened version of the input */
int main (int argc, char * argv[])
{
GtsSurface * s;
GtsPSurface * ps = NULL;
gboolean verbose = FALSE;
gboolean progressive = FALSE;
gboolean log_cost = FALSE;
guint number = 0;
gdouble cmax = 0.0;
StopOptions stop = NUMBER;
CostOptions cost = COST_OPTIMIZED;
MidvertexOptions mid = OPTIMIZED;
GtsKeyFunc cost_func = NULL;
GtsCoarsenFunc coarsen_func = NULL;
GtsStopFunc stop_func = NULL;
gpointer stop_data = NULL;
int c = 0;
GtsFile * fp;
gdouble fold = PI/180.;
GtsVolumeOptimizedParams params = { 0.5, 0.5, 0. };
gpointer coarsen_data = NULL, cost_data = NULL;
/* parse options using getopt */
while (c != EOF) {
#ifdef HAVE_GETOPT_LONG
static struct option long_options[] = {
{"angle", no_argument, NULL, 'a'},
{"progressive", no_argument, NULL, 'p'},
{"help", no_argument, NULL, 'h'},
{"verbose", no_argument, NULL, 'v'},
{"number", required_argument, NULL, 'n'},
{"length", no_argument, NULL, 'l'},
{"midvertex", no_argument, NULL, 'm'},
{"cost", required_argument, NULL, 'c'},
{"fold", required_argument, NULL, 'f'},
{"vweight", required_argument, NULL, 'w'},
{"bweight", required_argument, NULL, 'b'},
{"sweight", required_argument, NULL, 's'},
{"log", no_argument, NULL, 'L'}
};
int option_index = 0;
switch ((c = getopt_long (argc, argv, "hvmc:n:lpf:w:b:s:La",
long_options, &option_index))) {
#else /* not HAVE_GETOPT_LONG */
switch ((c = getopt (argc, argv, "hvmc:n:lpf:w:b:s:La"))) {
#endif /* not HAVE_GETOPT_LONG */
case 'a': /* angle */
cost = COST_ANGLE;
break;
case 'L': /* log */
log_cost = TRUE;
break;
case 'p': /* write progressive surface */
progressive = TRUE;
break;
case 'n': /* stop by number */
stop = NUMBER;
number = atoi (optarg);
break;
case 'c': /* stop by cost */
stop = COST;
cmax = atof (optarg);
break;
case 'v': /* verbose */
verbose = TRUE;
break;
case 'm': /* midvertex */
mid = MIDVERTEX;
break;
case 'l': /* cost is length */
cost = COST_LENGTH;
break;
case 'f': /* fold angle */
fold = atof (optarg)*PI/180.;
break;
case 'w': /* volume optimized weight */
params.volume_weight = atof (optarg);
break;
case 'b': /* boundary optimized weight */
params.boundary_weight = atof (optarg);
break;
case 's': /* shape optimized weight */
params.shape_weight = atof (optarg);
break;
case 'h': /* help */
fprintf (stderr,
"Usage: coarsen [OPTION] < file.gts\n"
"Construct a coarsened version of the input.\n"
"\n"
" -n N, --number=N stop the coarsening process if the number of\n"
" edges was to fall below N\n"
" -c C, --cost=C stop the coarsening process if the cost of collapsing\n"
" an edge is larger than C\n"
" -m --midvertex use midvertex as replacement vertex\n"
" default is volume optimized point\n"
" -l --length use length^2 as cost function\n"
" default is optimized point cost\n"
" -f F, --fold=F set maximum fold angle to F degrees\n"
" default is one degree\n"
" -w W, --vweight=W set weight used for volume optimization\n"
" default is 0.5\n"
" -b W, --bweight=W set weight used for boundary optimization\n"
" default is 0.5\n"
" -s W, --sweight=W set weight used for shape optimization\n"
" default is 0.0\n"
" -p --progressive write progressive surface file\n"
" -L --log logs the evolution of the cost\n"
" -v --verbose print statistics about the surface\n"
" -h --help display this help and exit\n"
"\n"
"Reports bugs to %s\n",
GTS_MAINTAINER);
return 0; /* success */
break;
case '?': /* wrong options */
fprintf (stderr, "Try `coarsen --help' for more information.\n");
return 1; /* failure */
}
}
/* read surface in */
s = gts_surface_new (gts_surface_class (),
gts_face_class (),
gts_edge_class (),
gts_vertex_class ());
fp = gts_file_new (stdin);
if (gts_surface_read (s, fp)) {
fputs ("coarsen: the file on standard input is not a valid GTS file\n",
stderr);
fprintf (stderr, "stdin:%d:%d: %s\n", fp->line, fp->pos, fp->error);
return 1; /* failure */
}
/* if verbose on print stats */
if (verbose) {
gts_surface_print_stats (s, stderr);
fprintf (stderr, "# volume: %g area: %g\n",
gts_surface_volume (s), gts_surface_area (s));
}
/* select the right coarsening process */
switch (cost) {
case COST_OPTIMIZED:
cost_func = (GtsKeyFunc) gts_volume_optimized_cost;
cost_data = ¶ms;
break;
case COST_LENGTH:
cost_func = NULL; break;
case COST_ANGLE:
cost_func = (GtsKeyFunc) cost_angle; break;
default:
g_assert_not_reached ();
}
switch (mid) {
case MIDVERTEX:
coarsen_func = NULL;
break;
case OPTIMIZED:
coarsen_func = (GtsCoarsenFunc) gts_volume_optimized_vertex;
coarsen_data = ¶ms;
break;
default:
g_assert_not_reached ();
}
if (log_cost)
stop_func = (GtsStopFunc) stop_log_cost;
else {
switch (stop) {
case NUMBER:
if (verbose)
stop_func = (GtsStopFunc) stop_number_verbose;
else
stop_func = (GtsStopFunc) gts_coarsen_stop_number;
stop_data = &number;
break;
case COST:
if (verbose)
stop_func = (GtsStopFunc) stop_cost_verbose;
else
stop_func = (GtsStopFunc) gts_coarsen_stop_cost;
stop_data = &cmax;
break;
default:
g_assert_not_reached ();
}
}
if (progressive)
ps = gts_psurface_new (gts_psurface_class (),
s, gts_split_class (),
cost_func, cost_data,
coarsen_func, coarsen_data,
stop_func, stop_data,
fold);
else
gts_surface_coarsen (s,
cost_func, cost_data,
coarsen_func, coarsen_data,
stop_func, stop_data, fold);
/* if verbose on print stats */
if (verbose) {
fputc ('\n', stderr);
gts_surface_print_stats (s, stderr);
fprintf (stderr, "# volume: %g area: %g\n",
gts_surface_volume (s), gts_surface_area (s));
}
/* write resulting surface to standard output */
if (progressive)
gts_psurface_write (ps, stdout);
else
gts_surface_write (s, stdout);
return 0; /* success */
}
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