Pileus Git - grits/blob - src/plugin-radar.c

   1 /*
   2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <config.h>
  19 #include <gtk/gtk.h>
  20 #include <gtk/gtkgl.h>
  21 #include <gio/gio.h>
  22 #include <GL/gl.h>
  23 #include <math.h>
  24 #include <rsl.h>
  25
  26 #include "aweather-gui.h"
  27 #include "plugin-radar.h"
  28 #include "data.h"
  29
  30 static char *nexrad_base = "http://mesonet.agron.iastate.edu/data/";
  31
  32 /****************
  33  * GObject code *
  34  ****************/
  35 /* Plugin init */
  36 static void aweather_radar_plugin_init(AWeatherPluginInterface *iface);
  37 static void _aweather_radar_expose(AWeatherPlugin *_radar);
  38 G_DEFINE_TYPE_WITH_CODE(AWeatherRadar, aweather_radar, G_TYPE_OBJECT,
  39                 G_IMPLEMENT_INTERFACE(AWEATHER_TYPE_PLUGIN,
  40                         aweather_radar_plugin_init));
  41 static void aweather_radar_plugin_init(AWeatherPluginInterface *iface)
  42 {
  43         g_debug("AWeatherRadar: plugin_init");
  44         /* Add methods to the interface */
  45         iface->expose = _aweather_radar_expose;
  46 }
  47 /* Class/Object init */
  48 static void aweather_radar_init(AWeatherRadar *radar)
  49 {
  50         g_debug("AWeatherRadar: class_init");
  51         /* Set defaults */
  52         radar->gui  = NULL;
  53         radar->soup = NULL;
  54 }
  55 static void aweather_radar_dispose(GObject *gobject)
  56 {
  57         g_debug("AWeatherRadar: dispose");
  58         AWeatherRadar *self = AWEATHER_RADAR(gobject);
  59         /* Drop references */
  60         G_OBJECT_CLASS(aweather_radar_parent_class)->dispose(gobject);
  61 }
  62 static void aweather_radar_finalize(GObject *gobject)
  63 {
  64         g_debug("AWeatherRadar: finalize");
  65         AWeatherRadar *self = AWEATHER_RADAR(gobject);
  66         /* Free data */
  67         G_OBJECT_CLASS(aweather_radar_parent_class)->finalize(gobject);
  68
  69 }
  70 static void aweather_radar_class_init(AWeatherRadarClass *klass)
  71 {
  72         g_debug("AWeatherRadar: class_init");
  73         GObjectClass *gobject_class = (GObjectClass*)klass;
  74         gobject_class->dispose  = aweather_radar_dispose;
  75         gobject_class->finalize = aweather_radar_finalize;
  76 }
  77
  78 /**************************
  79  * Data loading functions *
  80  **************************/
  81 /* Convert a sweep to an 2d array of data points */
  82 static void bscan_sweep(AWeatherRadar *self, Sweep *sweep, colormap_t *colormap,
  83                 guint8 **data, int *width, int *height)
  84 {
  85         /* Calculate max number of bins */
  86         int i, max_bins = 0;
  87         for (i = 0; i < sweep->h.nrays; i++)
  88                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  89
  90         /* Allocate buffer using max number of bins for each ray */
  91         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  92
  93         /* Fill the data */
  94         int ri, bi;
  95         for (ri = 0; ri < sweep->h.nrays; ri++) {
  96                 Ray *ray  = sweep->ray[ri];
  97                 for (bi = 0; bi < ray->h.nbins; bi++) {
  98                         /* copy RGBA into buffer */
  99                         //guint val   = dz_f(ray->range[bi]);
 100                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
 101                         guint  buf_i = (ri*max_bins+bi)*4;
 102                         buf[buf_i+0] = colormap->data[val][0];
 103                         buf[buf_i+1] = colormap->data[val][1];
 104                         buf[buf_i+2] = colormap->data[val][2];
 105                         buf[buf_i+3] = colormap->data[val][3];
 106                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
 107                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
 108                                 buf[buf_i+3] = 0x00; // transparent
 109                         }
 110                 }
 111         }
 112
 113         /* set output */
 114         *width  = max_bins;
 115         *height = sweep->h.nrays;
 116         *data   = buf;
 117 }
 118
 119 /* Load a sweep as the active texture */
 120 static void load_sweep(AWeatherRadar *self, Sweep *sweep)
 121 {
 122         aweather_gui_gl_begin(self->gui);
 123         self->cur_sweep = sweep;
 124         int height, width;
 125         guint8 *data;
 126         bscan_sweep(self, sweep, self->cur_colormap, &data, &width, &height);
 127         glDeleteTextures(1, &self->cur_sweep_tex);
 128         glGenTextures(1, &self->cur_sweep_tex);
 129         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 130         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 131         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 132         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 133         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 134         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
 135                         GL_RGBA, GL_UNSIGNED_BYTE, data);
 136         g_free(data);
 137         aweather_gui_gl_redraw(self->gui);
 138         aweather_gui_gl_end(self->gui);
 139 }
 140
 141 static void load_colormap(AWeatherRadar *self, gchar *table)
 142 {
 143         /* Set colormap so we can draw it on expose */
 144         for (int i = 0; colormaps[i].name; i++)
 145                 if (g_str_equal(colormaps[i].name, table))
 146                         self->cur_colormap = &colormaps[i];
 147 }
 148
 149 /* Add selectors to the config area for the sweeps */
 150 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self);
 151 static void load_radar_gui(AWeatherRadar *self, Radar *radar)
 152 {
 153         /* Clear existing items */
 154         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 155         if (child)
 156                 gtk_widget_destroy(child);
 157
 158         gdouble elev;
 159         guint rows = 1, cols = 1, cur_cols;
 160         gchar row_label_str[64], col_label_str[64], button_str[64];
 161         GtkWidget *row_label, *col_label, *button = NULL, *elev_box = NULL;
 162         GtkWidget *table = gtk_table_new(rows, cols, FALSE);
 163
 164         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 165                 Volume *vol = radar->v[vi];
 166                 if (vol == NULL) continue;
 167                 rows++; cols = 1; elev = 0;
 168
 169                 /* Row label */
 170                 g_snprintf(row_label_str, 64, "<b>%s:</b>", vol->h.type_str);
 171                 row_label = gtk_label_new(row_label_str);
 172                 gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 173                 gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 174                 gtk_table_attach(GTK_TABLE(table), row_label,
 175                                 0,1, rows-1,rows, GTK_FILL,GTK_FILL, 5,0);
 176
 177                 for (guint si = 0; si < vol->h.nsweeps; si++) {
 178                         Sweep *sweep = vol->sweep[si];
 179                         if (sweep == NULL || sweep->h.elev == 0) continue;
 180                         if (sweep->h.elev != elev) {
 181                                 cols++;
 182                                 elev = sweep->h.elev;
 183
 184                                 /* Column label */
 185                                 g_object_get(table, "n-columns", &cur_cols, NULL);
 186                                 if (cols >  cur_cols) {
 187                                         g_snprintf(col_label_str, 64, "<b>%.2f°</b>", elev);
 188                                         col_label = gtk_label_new(col_label_str);
 189                                         gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 190                                         gtk_widget_set_size_request(col_label, 40, -1);
 191                                         gtk_table_attach(GTK_TABLE(table), col_label,
 192                                                         cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 193                                 }
 194
 195                                 elev_box = gtk_hbox_new(TRUE, 0);
 196                                 gtk_table_attach(GTK_TABLE(table), elev_box,
 197                                                 cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 198                         }
 199
 200
 201                         /* Button */
 202                         g_snprintf(button_str, 64, "%3.2f", elev);
 203                         button = gtk_radio_button_new_with_label_from_widget(
 204                                         GTK_RADIO_BUTTON(button), button_str);
 205                         gtk_widget_set_size_request(button, -1, 26);
 206                         //button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 207                         //gtk_widget_set_size_request(button, -1, 22);
 208                         g_object_set(button, "draw-indicator", FALSE, NULL);
 209                         gtk_box_pack_end(GTK_BOX(elev_box), button, TRUE, TRUE, 0);
 210
 211                         g_object_set_data(G_OBJECT(button), "type",  vol->h.type_str);
 212                         g_object_set_data(G_OBJECT(button), "sweep", sweep);
 213                         g_signal_connect(button, "clicked", G_CALLBACK(on_sweep_clicked), self);
 214                 }
 215         }
 216         gtk_container_add(GTK_CONTAINER(self->config_body), table);
 217         gtk_widget_show_all(table);
 218 }
 219
 220 /* Load a radar from a decompressed file */
 221 static void load_radar(AWeatherRadar *self, gchar *radar_file)
 222 {
 223         char *dir  = g_path_get_dirname(radar_file);
 224         char *site = g_path_get_basename(dir);
 225         g_free(dir);
 226         g_debug("AWeatherRadar: load_radar - Loading new radar");
 227         RSL_read_these_sweeps("all", NULL);
 228         Radar *radar = self->cur_radar = RSL_wsr88d_to_radar(radar_file, site);
 229         if (radar == NULL) {
 230                 g_warning("fail to load radar: path=%s, site=%s", radar_file, site);
 231                 g_free(site);
 232                 return;
 233         }
 234         g_free(site);
 235
 236         /* Load the first sweep by default */
 237         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 238                 g_warning("No sweeps found\n");
 239         } else {
 240                 /* load first available sweep */
 241                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 242                         if (radar->v[vi]== NULL) continue;
 243                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 244                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 245                                 load_colormap(self, radar->v[vi]->h.type_str);
 246                                 load_sweep(self, radar->v[vi]->sweep[si]);
 247                                 break;
 248                         }
 249                         break;
 250                 }
 251         }
 252
 253         load_radar_gui(self, radar);
 254 }
 255
 256 /* TODO: These update times functions are getting ugly... */
 257 static void update_times_gtk(AWeatherRadar *self, GList *times)
 258 {
 259         gchar *last_time = NULL;
 260         GRegex *regex = g_regex_new("^[A-Z]{4}_([0-9]{8}_[0-9]{4})$", 0, 0, NULL); // KLSX_20090622_2113
 261         GMatchInfo *info;
 262
 263         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(self->gui, "time"));
 264         GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
 265         gtk_list_store_clear(lstore);
 266         GtkTreeIter iter;
 267         times = g_list_reverse(times);
 268         for (GList *cur = times; cur; cur = cur->next) {
 269                 g_message("trying time %s", (gchar*)cur->data);
 270                 if (g_regex_match(regex, cur->data, 0, &info)) {
 271                         gchar *time = g_match_info_fetch(info, 1);
 272                         g_message("adding time %s", (gchar*)cur->data);
 273                         gtk_list_store_insert(lstore, &iter, 0);
 274                         gtk_list_store_set(lstore, &iter, 0, time, -1);
 275                         last_time = time;
 276                 }
 277         }
 278
 279         AWeatherView *view = aweather_gui_get_view(self->gui);
 280         aweather_view_set_time(view, last_time);
 281
 282         g_regex_unref(regex);
 283         g_list_foreach(times, (GFunc)g_free, NULL);
 284         g_list_free(times);
 285 }
 286 static void update_times_online_cb(char *path, gboolean updated, gpointer _self)
 287 {
 288         GList *times = NULL;
 289         gchar *data;
 290         gsize length;
 291         g_file_get_contents(path, &data, &length, NULL);
 292         gchar **lines = g_strsplit(data, "\n", -1);
 293         for (int i = 0; lines[i] && lines[i][0]; i++) {
 294                 char **parts = g_strsplit(lines[i], " ", 2);
 295                 times = g_list_prepend(times, g_strdup(parts[1]));
 296                 g_strfreev(parts);
 297         }
 298         g_strfreev(lines);
 299         g_free(data);
 300
 301         update_times_gtk(_self, times);
 302 }
 303 static void update_times(AWeatherRadar *self, AWeatherView *view, char *site)
 304 {
 305         if (aweather_view_get_offline(view)) {
 306                 GList *times = NULL;
 307                 gchar *path = g_build_filename(g_get_user_cache_dir(), PACKAGE, "nexrd2", "raw", site, NULL);
 308                 GDir *dir = g_dir_open(path, 0, NULL);
 309                 if (dir) {
 310                         const gchar *name;
 311                         while ((name = g_dir_read_name(dir))) {
 312                                 times = g_list_prepend(times, g_strdup(name));
 313                         }
 314                         g_dir_close(dir);
 315                 }
 316                 g_free(path);
 317                 update_times_gtk(self, times);
 318         } else {
 319                 gchar *path = g_strdup_printf("nexrd2/raw/%s/dir.list", site);
 320                 cache_file(nexrad_base, path, AWEATHER_REFRESH, NULL, update_times_online_cb, self);
 321                 /* update_times_gtk from update_times_online_cb */
 322         }
 323 }
 324
 325 /*****************
 326  * ASync helpers *
 327  *****************/
 328 typedef struct {
 329         AWeatherRadar *self;
 330         gchar *radar_file;
 331 } decompressed_t;
 332
 333 static void decompressed_cb(GPid pid, gint status, gpointer _udata)
 334 {
 335         decompressed_t *udata = _udata;
 336         if (status != 0) {
 337                 g_warning("wsr88ddec exited with status %d", status);
 338                 return;
 339         }
 340         load_radar(udata->self, udata->radar_file);
 341         g_spawn_close_pid(pid);
 342         g_free(udata->radar_file);
 343         g_free(udata);
 344 }
 345
 346 static void cache_chunk_cb(char *path, goffset cur, goffset total, gpointer _self)
 347 {
 348         AWeatherRadar *self = AWEATHER_RADAR(_self);
 349         double percent = (double)cur/total;
 350
 351         g_message("AWeatherRadar: cache_chunk_cb - %lld/%lld = %.2f%%",
 352                         cur, total, percent*100);
 353
 354         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(self->progress_bar), MIN(percent, 1.0));
 355
 356         gchar *msg = g_strdup_printf("Loading radar... %5.1f%% (%.2f/%.2f MB)",
 357                         percent*100, (double)cur/1000000, (double)total/1000000);
 358         gtk_label_set_text(GTK_LABEL(self->progress_label), msg);
 359         g_free(msg);
 360 }
 361
 362 static void cache_done_cb(char *path, gboolean updated, gpointer _self)
 363 {
 364         AWeatherRadar *self = AWEATHER_RADAR(_self);
 365         char *decompressed = g_strconcat(path, ".raw", NULL);
 366         if (!updated) {
 367                 load_radar(self, decompressed);
 368                 return;
 369         }
 370
 371         decompressed_t *udata = g_malloc(sizeof(decompressed_t));
 372         udata->self       = self;
 373         udata->radar_file = decompressed;
 374         g_debug("AWeatherRadar: cache_done_cb - File updated, decompressing..");
 375         char *argv[] = {"wsr88ddec", path, decompressed, NULL};
 376         GPid pid;
 377         GError *error = NULL;
 378         g_spawn_async(
 379                 NULL,    // const gchar *working_directory,
 380                 argv,    // gchar **argv,
 381                 NULL,    // gchar **envp,
 382                 G_SPAWN_SEARCH_PATH|
 383                 G_SPAWN_DO_NOT_REAP_CHILD,
 384                          // GSpawnFlags flags,
 385                 NULL,    // GSpawnChildSetupFunc child_setup,
 386                 NULL,    // gpointer user_data,
 387                 &pid,    // GPid *child_pid,
 388                 &error); // GError **error
 389         if (error) {
 390                 g_warning("failed to decompress WSR88D data: %s",
 391                                 error->message);
 392                 g_error_free(error);
 393         }
 394         g_child_watch_add(pid, decompressed_cb, udata);
 395         self->soup = NULL;
 396 }
 397
 398 /*************
 399  * Callbacks *
 400  *************/
 401 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self)
 402 {
 403         AWeatherRadar *self = AWEATHER_RADAR(_self);
 404         load_colormap(self, g_object_get_data(G_OBJECT(button), "type" ));
 405         load_sweep   (self, g_object_get_data(G_OBJECT(button), "sweep"));
 406 }
 407
 408 static void on_time_changed(AWeatherView *view, const char *time, gpointer _self)
 409 {
 410         AWeatherRadar *self = AWEATHER_RADAR(_self);
 411         g_debug("AWeatherRadar: on_time_changed - setting time=%s", time);
 412         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 413         char *site = aweather_view_get_site(view);
 414         char *path = g_strdup_printf("nexrd2/raw/%s/%s_%s", site, site, time);
 415
 416         /* Set up progress bar */
 417         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 418         if (child) gtk_widget_destroy(child);
 419
 420         GtkWidget *vbox = gtk_vbox_new(FALSE, 10);
 421         gtk_container_set_border_width(GTK_CONTAINER(vbox), 10);
 422         self->progress_bar   = gtk_progress_bar_new();
 423         self->progress_label = gtk_label_new("Loading radar...");
 424         gtk_box_pack_start(GTK_BOX(vbox), self->progress_bar,   FALSE, FALSE, 0);
 425         gtk_box_pack_start(GTK_BOX(vbox), self->progress_label, FALSE, FALSE, 0);
 426         gtk_container_add(GTK_CONTAINER(self->config_body), vbox);
 427         gtk_widget_show_all(self->config_body);
 428
 429         /* Clear radar */
 430         if (self->cur_radar)
 431                 RSL_free_radar(self->cur_radar);
 432         self->cur_radar = NULL;
 433         self->cur_sweep = NULL;
 434         aweather_gui_gl_redraw(self->gui);
 435
 436         /* Start loading the new radar */
 437         if (self->soup) {
 438                 soup_session_abort(self->soup);
 439                 self->soup = NULL;
 440         }
 441         if (aweather_view_get_offline(view))
 442                 self->soup = cache_file(nexrad_base, path, AWEATHER_ONCE,
 443                                 cache_chunk_cb, cache_done_cb, self);
 444         else
 445                 self->soup = cache_file(nexrad_base, path, AWEATHER_UPDATE,
 446                                 cache_chunk_cb, cache_done_cb, self);
 447         g_free(path);
 448 }
 449
 450 static void on_site_changed(AWeatherView *view, char *site, gpointer _self)
 451 {
 452         AWeatherRadar *self = AWEATHER_RADAR(_self);
 453         g_debug("AWeatherRadar: on_site_changed - Loading wsr88d list for %s", site);
 454         update_times(self, view, site), &time;
 455 }
 456
 457 static void on_refresh(AWeatherView *view, gpointer _self)
 458 {
 459         AWeatherRadar *self = AWEATHER_RADAR(_self);
 460         char *site = aweather_view_get_site(view);
 461         update_times(self, view, site);
 462 }
 463
 464 /***********
 465  * Methods *
 466  ***********/
 467 AWeatherRadar *aweather_radar_new(AWeatherGui *gui)
 468 {
 469         g_debug("AWeatherRadar: new");
 470         AWeatherRadar *self = g_object_new(AWEATHER_TYPE_RADAR, NULL);
 471         self->gui = gui;
 472
 473         GtkWidget    *config  = aweather_gui_get_widget(gui, "tabs");
 474         AWeatherView *view    = aweather_gui_get_view(gui);
 475
 476         /* Add configuration tab */
 477         self->config_body = gtk_alignment_new(0, 0, 1, 1);
 478         gtk_container_set_border_width(GTK_CONTAINER(self->config_body), 5);
 479         gtk_container_add(GTK_CONTAINER(self->config_body), gtk_label_new("No radar loaded"));
 480         gtk_notebook_prepend_page(GTK_NOTEBOOK(config), self->config_body, gtk_label_new("Radar"));
 481
 482         /* Set up OpenGL Stuff */
 483         g_signal_connect(view,    "site-changed", G_CALLBACK(on_site_changed), self);
 484         g_signal_connect(view,    "time-changed", G_CALLBACK(on_time_changed), self);
 485         g_signal_connect(view,    "refresh",      G_CALLBACK(on_refresh),      self);
 486
 487         return self;
 488 }
 489
 490 static void _aweather_radar_expose(AWeatherPlugin *_self)
 491 {
 492         AWeatherRadar *self = AWEATHER_RADAR(_self);
 493         g_debug("AWeatherRadar: expose");
 494         if (self->cur_sweep == NULL)
 495                 return;
 496         Sweep *sweep = self->cur_sweep;
 497
 498         /* Draw the rays */
 499
 500         glMatrixMode(GL_MODELVIEW);
 501         glPushMatrix();
 502         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 503         glEnable(GL_TEXTURE_2D);
 504         glDisable(GL_ALPHA_TEST);
 505         glColor4f(1,1,1,1);
 506         glBegin(GL_QUAD_STRIP);
 507         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 508                 Ray  *ray = NULL;
 509                 double angle = 0;
 510                 if (ri < sweep->h.nrays) {
 511                         ray = sweep->ray[ri];
 512                         angle = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 513                 } else {
 514                         /* Do the right side of the last sweep */
 515                         ray = sweep->ray[ri-1];
 516                         angle = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 517                 }
 518
 519                 double lx = sin(angle);
 520                 double ly = cos(angle);
 521
 522                 double near_dist = ray->h.range_bin1;
 523                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 524
 525                 /* (find middle of bin) / scale for opengl */
 526                 // near left
 527                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays-0.01);
 528                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 529
 530                 // far  left
 531                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays-0.01);
 532                 glVertex3f(lx*far_dist,  ly*far_dist,  2.0);
 533         }
 534         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 535         glEnd();
 536         glPopMatrix();
 537
 538         /* Texture debug */
 539         //glBegin(GL_QUADS);
 540         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 541         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 542         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 543         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 544         //glEnd();
 545
 546         /* Print the color table */
 547         glDisable(GL_TEXTURE_2D);
 548         glDisable(GL_DEPTH_TEST);
 549         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 550         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 551         glBegin(GL_QUADS);
 552         int i;
 553         for (i = 0; i < 256; i++) {
 554                 glColor4ub(self->cur_colormap->data[i][0],
 555                            self->cur_colormap->data[i][1],
 556                            self->cur_colormap->data[i][2],
 557                            self->cur_colormap->data[i][3]);
 558                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
 559                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
 560                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
 561                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
 562         }
 563         glEnd();
 564         glEnable(GL_DEPTH_TEST);
 565         glEnable(GL_ALPHA_TEST);
 566         glMatrixMode(GL_PROJECTION); glPopMatrix();
 567         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 568 }