Pileus Git - aweather/blob - src/plugins/level2.c

   1 /*
   2  * Copyright (C) 2009-2011 Andy Spencer <andy753421@gmail.com>
   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 <math.h>
  20 #include <glib/gstdio.h>
  21 #include <grits.h>
  22 #include <rsl.h>
  23
  24 #include "level2.h"
  25
  26 #include "compat.h"
  27
  28 #define ISO_MIN 30
  29 #define ISO_MAX 80
  30
  31 /**************************
  32  * Data loading functions *
  33  **************************/
  34 /* Convert a sweep to an 2d array of data points */
  35 static void _bscan_sweep(Sweep *sweep, AWeatherColormap *colormap,
  36                 guint8 **data, int *width, int *height)
  37 {
  38         g_debug("AWeatherLevel2: _bscan_sweep - %p, %p, %p",
  39                         sweep, colormap, data);
  40         /* Calculate max number of bins */
  41         int max_bins = 0;
  42         for (int i = 0; i < sweep->h.nrays; i++)
  43                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  44
  45         /* Allocate buffer using max number of bins for each ray */
  46         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  47
  48         /* Fill the data */
  49         for (int ri = 0; ri < sweep->h.nrays; ri++) {
  50                 Ray *ray  = sweep->ray[ri];
  51                 for (int bi = 0; bi < ray->h.nbins; bi++) {
  52                         guint  buf_i = (ri*max_bins+bi)*4;
  53                         float  value = ray->h.f(ray->range[bi]);
  54
  55                         /* Check for bad values */
  56                         if (value == BADVAL     || value == RFVAL      || value == APFLAG ||
  57                             value == NOTFOUND_H || value == NOTFOUND_V || value == NOECHO) {
  58                                 buf[buf_i+3] = 0x00; // transparent
  59                                 continue;
  60                         }
  61
  62                         /* Copy color to buffer */
  63                         guint8 *data = colormap_get(colormap, value);
  64                         buf[buf_i+0] = data[0];
  65                         buf[buf_i+1] = data[1];
  66                         buf[buf_i+2] = data[2];
  67                         buf[buf_i+3] = data[3]*0.75; // TESTING
  68                 }
  69         }
  70
  71         /* set output */
  72         *width  = max_bins;
  73         *height = sweep->h.nrays;
  74         *data   = buf;
  75 }
  76
  77 /* Load a sweep into an OpenGL texture */
  78 static void _load_sweep_gl(AWeatherLevel2 *level2)
  79 {
  80         g_debug("AWeatherLevel2: _load_sweep_gl");
  81         guint8 *data;
  82         gint width, height;
  83         _bscan_sweep(level2->sweep, level2->sweep_colors, &data, &width, &height);
  84         gint tex_width  = pow(2, ceil(log(width )/log(2)));
  85         gint tex_height = pow(2, ceil(log(height)/log(2)));
  86         level2->sweep_coords[0] = (double)width  / tex_width;
  87         level2->sweep_coords[1] = (double)height / tex_height;
  88
  89         if (!level2->sweep_tex)
  90                  glGenTextures(1, &level2->sweep_tex);
  91         glBindTexture(GL_TEXTURE_2D, level2->sweep_tex);
  92         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  93         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  94         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, tex_width, tex_height, 0,
  95                         GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  96         glTexSubImage2D(GL_TEXTURE_2D, 0, 0,0, width,height,
  97                         GL_RGBA, GL_UNSIGNED_BYTE, data);
  98         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  99         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 100
 101         g_free(data);
 102 }
 103
 104 /* Decompress a radar file using wsr88dec */
 105 static gboolean _decompress_radar(const gchar *file, const gchar *raw)
 106 {
 107         g_debug("AWeatherLevel2: _decompress_radar - \n\t%s\n\t%s", file, raw);
 108         char *argv[] = {"wsr88ddec", (gchar*)file, (gchar*)raw, NULL};
 109         gint status;
 110         GError *error = NULL;
 111         g_spawn_sync(
 112                 NULL,    // const gchar *working_directory
 113                 argv,    // gchar **argv
 114                 NULL,    // gchar **envp
 115                 G_SPAWN_SEARCH_PATH, // GSpawnFlags flags
 116                 NULL,    // GSpawnChildSetupFunc child_setup
 117                 NULL,    // gpointer user_data
 118                 NULL,    // gchar *standard_output
 119                 NULL,    // gchar *standard_output
 120                 &status, // gint *exit_status
 121                 &error); // GError **error
 122         if (error) {
 123                 g_warning("AWeatherLevel2: _decompress_radar - %s", error->message);
 124                 g_error_free(error);
 125                 return FALSE;
 126         }
 127         if (status != 0) {
 128                 gchar *msg = g_strdup_printf("wsr88ddec exited with status %d", status);
 129                 g_warning("AWeatherLevel2: _decompress_radar - %s", msg);
 130                 g_free(msg);
 131                 return FALSE;
 132         }
 133         return TRUE;
 134 }
 135
 136 /* Load the radar into a Grits Volume */
 137 static void _cart_to_sphere(VolCoord *out, VolCoord *in)
 138 {
 139         gdouble angle = in->x;
 140         gdouble dist  = in->y;
 141         gdouble tilt  = in->z;
 142         gdouble lx    = sin(angle);
 143         gdouble ly    = cos(angle);
 144         gdouble lz    = sin(tilt);
 145         //out->x = (ly*dist)/20000;
 146         //out->y = (lz*dist)/10000-0.5;
 147         //out->z = (lx*dist)/20000-1.5;
 148         out->x = (lx*dist);
 149         out->y = (ly*dist);
 150         out->z = (lz*dist);
 151 }
 152
 153 static VolGrid *_load_grid(Volume *vol)
 154 {
 155         g_debug("AWeatherLevel2: _load_grid");
 156
 157         Sweep *sweep   = vol->sweep[0];
 158         Ray   *ray     = sweep->ray[0];
 159         gint nsweeps   = vol->h.nsweeps;
 160         gint nrays     = sweep->h.nrays/(1/sweep->h.beam_width)+1;
 161         gint nbins     = ray->h.nbins  /(1000/ray->h.gate_size);
 162         nbins = MIN(nbins, 150);
 163
 164         VolGrid  *grid = vol_grid_new(nrays, nbins, nsweeps);
 165
 166         gint rs, bs, val;
 167         gint si=0, ri=0, bi=0;
 168         for (si = 0; si < nsweeps; si++) {
 169                 sweep = vol->sweep[si];
 170                 rs    = 1.0/sweep->h.beam_width;
 171         for (ri = 0; ri < nrays; ri++) {
 172                 /* TODO: missing rays, pick ri based on azmith */
 173                 ray   = sweep->ray[(ri*rs) % sweep->h.nrays];
 174                 bs    = 1000/ray->h.gate_size;
 175         for (bi = 0; bi < nbins; bi++) {
 176                 if (bi*bs >= ray->h.nbins)
 177                         break;
 178                 val   = ray->h.f(ray->range[bi*bs]);
 179                 if (val == BADVAL     || val == RFVAL      ||
 180                     val == APFLAG     || val == NOECHO     ||
 181                     val == NOTFOUND_H || val == NOTFOUND_V ||
 182                     val > 80)
 183                         val = 0;
 184                 VolPoint *point = vol_grid_get(grid, ri, bi, si);
 185                 point->value = val;
 186                 point->c.x = deg2rad(ray->h.azimuth);
 187                 point->c.y = bi*bs*ray->h.gate_size + ray->h.range_bin1;
 188                 point->c.z = deg2rad(ray->h.elev);
 189         } } }
 190
 191         for (si = 0; si < nsweeps; si++)
 192         for (ri = 0; ri < nrays; ri++)
 193         for (bi = 0; bi < nbins; bi++) {
 194                 VolPoint *point = vol_grid_get(grid, ri, bi, si);
 195                 if (point->c.y == 0)
 196                         point->value = nan("");
 197                 else
 198                         _cart_to_sphere(&point->c, &point->c);
 199         }
 200         return grid;
 201 }
 202
 203
 204 /*********************
 205  * Drawing functions *
 206  *********************/
 207 void aweather_level2_draw(GritsObject *_level2, GritsOpenGL *opengl)
 208 {
 209         AWeatherLevel2 *level2 = AWEATHER_LEVEL2(_level2);
 210         if (!level2->sweep || !level2->sweep_tex)
 211                 return;
 212
 213         /* Draw wsr88d */
 214         Sweep *sweep = level2->sweep;
 215         //glDisable(GL_ALPHA_TEST);
 216         glDisable(GL_CULL_FACE);
 217         glDisable(GL_LIGHTING);
 218         glEnable(GL_TEXTURE_2D);
 219         glEnable(GL_POLYGON_OFFSET_FILL);
 220         glPolygonOffset(1.0, -2.0);
 221         glColor4f(1,1,1,1);
 222
 223         /* Draw the rays */
 224         gdouble xscale = level2->sweep_coords[0];
 225         gdouble yscale = level2->sweep_coords[1];
 226         glBindTexture(GL_TEXTURE_2D, level2->sweep_tex);
 227         glBegin(GL_TRIANGLE_STRIP);
 228         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 229                 Ray  *ray = NULL;
 230                 double angle = 0;
 231                 if (ri < sweep->h.nrays) {
 232                         ray = sweep->ray[ri];
 233                         angle = deg2rad(ray->h.azimuth - ((double)ray->h.beam_width/2.));
 234                 } else {
 235                         /* Do the right side of the last sweep */
 236                         ray = sweep->ray[ri-1];
 237                         angle = deg2rad(ray->h.azimuth + ((double)ray->h.beam_width/2.));
 238                 }
 239
 240                 double lx = sin(angle);
 241                 double ly = cos(angle);
 242
 243                 double near_dist = ray->h.range_bin1 - ((double)ray->h.gate_size/2.);
 244                 double far_dist  = near_dist + (double)ray->h.nbins*ray->h.gate_size;
 245
 246                 /* (find middle of bin) / scale for opengl */
 247                 // near left
 248                 glTexCoord2f(0.0, ((double)ri/sweep->h.nrays)*yscale);
 249                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 250
 251                 // far  left
 252                 // todo: correct range-height function
 253                 double height = sin(deg2rad(ray->h.elev)) * far_dist;
 254                 glTexCoord2f(xscale, ((double)ri/sweep->h.nrays)*yscale);
 255                 glVertex3f(lx*far_dist,  ly*far_dist, height);
 256         }
 257         glEnd();
 258         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 259
 260         /* Texture debug */
 261         //glBegin(GL_QUADS);
 262         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 263         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 264         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 265         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 266         //glEnd();
 267 }
 268
 269 void aweather_level2_hide(GritsObject *_level2, gboolean hidden)
 270 {
 271         AWeatherLevel2 *level2 = AWEATHER_LEVEL2(_level2);
 272         if (level2->volume)
 273                 grits_object_hide(GRITS_OBJECT(level2->volume), hidden);
 274 }
 275
 276
 277 /***********
 278  * Methods *
 279  ***********/
 280 static gboolean _set_sweep_cb(gpointer _level2)
 281 {
 282         g_debug("AWeatherLevel2: _set_sweep_cb");
 283         AWeatherLevel2 *level2 = _level2;
 284         _load_sweep_gl(level2);
 285         grits_object_queue_draw(_level2);
 286         g_object_unref(level2);
 287         return FALSE;
 288 }
 289 void aweather_level2_set_sweep(AWeatherLevel2 *level2,
 290                 int type, float elev)
 291 {
 292         g_debug("AWeatherLevel2: set_sweep - %d %f", type, elev);
 293
 294         /* Find sweep */
 295         Volume *volume = RSL_get_volume(level2->radar, type);
 296         if (!volume) return;
 297         level2->sweep = RSL_get_closest_sweep(volume, elev, 90);
 298         if (!level2->sweep) return;
 299
 300         /* Find colormap */
 301         level2->sweep_colors = NULL;
 302         for (int i = 0; level2->colormap[i].file; i++)
 303                 if (level2->colormap[i].type == type)
 304                         level2->sweep_colors = &level2->colormap[i];
 305         if (!level2->sweep_colors) {
 306                 g_warning("AWeatherLevel2: set_sweep - missing colormap[%d]", type);
 307                 level2->sweep_colors = &level2->colormap[0];
 308         }
 309
 310         /* Load data */
 311         g_object_ref(level2);
 312         g_idle_add(_set_sweep_cb, level2);
 313 }
 314
 315 void aweather_level2_set_iso(AWeatherLevel2 *level2, gfloat level)
 316 {
 317         g_debug("AWeatherLevel2: set_iso - %f", level);
 318
 319         if (!level2->volume) {
 320                 g_debug("AWeatherLevel2: set_iso - creating new volume");
 321                 Volume      *rvol = RSL_get_volume(level2->radar, DZ_INDEX);
 322                 VolGrid     *grid = _load_grid(rvol);
 323                 GritsVolume *vol  = grits_volume_new(grid);
 324                 vol->proj = GRITS_VOLUME_CARTESIAN;
 325                 vol->disp = GRITS_VOLUME_SURFACE;
 326                 GRITS_OBJECT(vol)->center = GRITS_OBJECT(level2)->center;
 327                 grits_viewer_add(GRITS_OBJECT(level2)->viewer,
 328                                 GRITS_OBJECT(vol), GRITS_LEVEL_WORLD+5, TRUE);
 329                 level2->volume = vol;
 330         }
 331         if (ISO_MIN < level && level < ISO_MAX) {
 332                 guint8 *data = colormap_get(&level2->colormap[0], level);
 333                 level2->volume->color[0] = data[0];
 334                 level2->volume->color[1] = data[1];
 335                 level2->volume->color[2] = data[2];
 336                 level2->volume->color[3] = data[3];
 337                 grits_volume_set_level(level2->volume, level);
 338                 grits_object_hide(GRITS_OBJECT(level2->volume), FALSE);
 339         } else {
 340                 grits_object_hide(GRITS_OBJECT(level2->volume), TRUE);
 341         }
 342 }
 343
 344 AWeatherLevel2 *aweather_level2_new(Radar *radar, AWeatherColormap *colormap)
 345 {
 346         g_debug("AWeatherLevel2: new - %s", radar->h.radar_name);
 347         RSL_sort_radar(radar);
 348         AWeatherLevel2 *level2 = g_object_new(AWEATHER_TYPE_LEVEL2, NULL);
 349         level2->radar    = radar;
 350         level2->colormap = colormap;
 351         aweather_level2_set_sweep(level2, DZ_INDEX, 0);
 352
 353         GritsPoint center;
 354         Radar_header *h = &radar->h;
 355         center.lat  = (double)h->latd + (double)h->latm/60 + (double)h->lats/(60*60);
 356         center.lon  = (double)h->lond + (double)h->lonm/60 + (double)h->lons/(60*60);
 357         center.elev = h->height;
 358         GRITS_OBJECT(level2)->center = center;
 359         return level2;
 360 }
 361
 362 AWeatherLevel2 *aweather_level2_new_from_file(const gchar *file, const gchar *site,
 363                 AWeatherColormap *colormap)
 364 {
 365         g_debug("AWeatherLevel2: new_from_file %s %s", site, file);
 366
 367         /* Decompress radar */
 368         gchar *raw = g_strconcat(file, ".raw", NULL);
 369         if (g_file_test(raw, G_FILE_TEST_EXISTS)) {
 370                 struct stat files, raws;
 371                 g_stat(file, &files);
 372                 g_stat(raw,  &raws);
 373                 if (files.st_mtime > raws.st_mtime)
 374                         if (!_decompress_radar(file, raw))
 375                                 return NULL;
 376         } else {
 377                 if (!_decompress_radar(file, raw))
 378                         return NULL;
 379         }
 380
 381         /* Load the radar file */
 382         RSL_read_these_sweeps("all", NULL);
 383         g_debug("AWeatherLevel2: rsl read start");
 384         Radar *radar = RSL_wsr88d_to_radar(raw, (gchar*)site);
 385         g_debug("AWeatherLevel2: rsl read done");
 386         g_free(raw);
 387         if (!radar)
 388                 return NULL;
 389
 390         return aweather_level2_new(radar, colormaps);
 391 }
 392
 393 static void _on_sweep_clicked(GtkRadioButton *button, gpointer _level2)
 394 {
 395         AWeatherLevel2 *level2 = _level2;
 396         if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button))) {
 397                 gint type = (glong)g_object_get_data(G_OBJECT(button), "type");
 398                 gint elev = (glong)g_object_get_data(G_OBJECT(button), "elev");
 399                 aweather_level2_set_sweep(level2, type, (float)elev/100);
 400                 //level2->colormap = level2->sweep_colors;
 401         }
 402 }
 403
 404 static void _on_iso_changed(GtkRange *range, gpointer _level2)
 405 {
 406         AWeatherLevel2 *level2 = _level2;
 407         gfloat level = gtk_range_get_value(range);
 408         aweather_level2_set_iso(level2, level);
 409 }
 410
 411 GtkWidget *aweather_level2_get_config(AWeatherLevel2 *level2)
 412 {
 413         Radar *radar = level2->radar;
 414         g_debug("AWeatherLevel2: get_config - %p, %p", level2, radar);
 415         /* Clear existing items */
 416         gfloat elev;
 417         guint rows = 1, cols = 1, cur_cols;
 418         gchar row_label_str[64], col_label_str[64], button_str[64];
 419         GtkWidget *row_label, *col_label, *button = NULL, *elev_box = NULL;
 420         GtkWidget *table = gtk_table_new(rows, cols, FALSE);
 421
 422         /* Add date */
 423         gchar *date_str = g_strdup_printf("<b><i>%04d-%02d-%02d %02d:%02d</i></b>",
 424                         radar->h.year, radar->h.month, radar->h.day,
 425                         radar->h.hour, radar->h.minute);
 426         GtkWidget *date_label = gtk_label_new(date_str);
 427         gtk_label_set_use_markup(GTK_LABEL(date_label), TRUE);
 428         gtk_table_attach(GTK_TABLE(table), date_label,
 429                         0,1, 0,1, GTK_FILL,GTK_FILL, 5,0);
 430         g_free(date_str);
 431
 432         /* Add sweeps */
 433         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 434                 Volume *vol = radar->v[vi];
 435                 if (vol == NULL) continue;
 436                 rows++; cols = 1; elev = 0;
 437
 438                 /* Row label */
 439                 g_snprintf(row_label_str, 64, "<b>%s:</b>", vol->h.type_str);
 440                 row_label = gtk_label_new(row_label_str);
 441                 gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 442                 gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 443                 gtk_table_attach(GTK_TABLE(table), row_label,
 444                                 0,1, rows-1,rows, GTK_FILL,GTK_FILL, 5,0);
 445
 446                 for (guint si = 0; si < vol->h.nsweeps; si++) {
 447                         Sweep *sweep = vol->sweep[si];
 448                         if (sweep == NULL || sweep->h.elev == 0) continue;
 449                         if (sweep->h.elev != elev) {
 450                                 cols++;
 451                                 elev = sweep->h.elev;
 452
 453                                 /* Column label */
 454                                 g_object_get(table, "n-columns", &cur_cols, NULL);
 455                                 if (cols >  cur_cols) {
 456                                         g_snprintf(col_label_str, 64, "<b>%.2f°</b>", elev);
 457                                         col_label = gtk_label_new(col_label_str);
 458                                         gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 459                                         gtk_widget_set_size_request(col_label, 50, -1);
 460                                         gtk_table_attach(GTK_TABLE(table), col_label,
 461                                                         cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 462                                 }
 463
 464                                 elev_box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, 0);
 465                                 gtk_box_set_homogeneous(GTK_BOX(elev_box), TRUE);
 466                                 gtk_table_attach(GTK_TABLE(table), elev_box,
 467                                                 cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 468                         }
 469
 470
 471                         /* Button */
 472                         g_snprintf(button_str, 64, "%3.2f", elev);
 473                         button = gtk_radio_button_new_with_label_from_widget(
 474                                         GTK_RADIO_BUTTON(button), button_str);
 475                         gtk_widget_set_size_request(button, -1, 26);
 476                         //button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 477                         //gtk_widget_set_size_request(button, -1, 22);
 478                         g_object_set(button, "draw-indicator", FALSE, NULL);
 479                         gtk_box_pack_end(GTK_BOX(elev_box), button, TRUE, TRUE, 0);
 480
 481                         g_object_set_data(G_OBJECT(button), "level2", level2);
 482                         g_object_set_data(G_OBJECT(button), "type", (gpointer)(guintptr)vi);
 483                         g_object_set_data(G_OBJECT(button), "elev", (gpointer)(guintptr)(elev*100));
 484                         g_signal_connect(button, "clicked", G_CALLBACK(_on_sweep_clicked), level2);
 485                 }
 486         }
 487
 488         /* Add Iso-surface volume */
 489         g_object_get(table, "n-columns", &cols, NULL);
 490         row_label = gtk_label_new("<b>Isosurface:</b>");
 491         gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 492         gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 493         gtk_table_attach(GTK_TABLE(table), row_label,
 494                         0,1, rows,rows+1, GTK_FILL,GTK_FILL, 5,0);
 495         GtkWidget *scale = gtk_scale_new_with_range(GTK_ORIENTATION_HORIZONTAL, ISO_MIN, ISO_MAX, 0.5);
 496         gtk_widget_set_size_request(scale, -1, 26);
 497         gtk_scale_set_value_pos(GTK_SCALE(scale), GTK_POS_LEFT);
 498         gtk_range_set_inverted(GTK_RANGE(scale), TRUE);
 499         gtk_range_set_value(GTK_RANGE(scale), ISO_MAX);
 500         g_signal_connect(scale, "value-changed", G_CALLBACK(_on_iso_changed), level2);
 501         gtk_table_attach(GTK_TABLE(table), scale,
 502                         1,cols+1, rows,rows+1, GTK_FILL|GTK_EXPAND,GTK_FILL, 0,0);
 503         /* Shove all the buttons to the left, but keep the slider expanded */
 504         gtk_table_attach(GTK_TABLE(table), gtk_label_new(""),
 505                         cols,cols+1, 0,1, GTK_FILL|GTK_EXPAND,GTK_FILL, 0,0);
 506         return table;
 507 }
 508
 509 /****************
 510  * GObject code *
 511  ****************/
 512 G_DEFINE_TYPE(AWeatherLevel2, aweather_level2, GRITS_TYPE_OBJECT);
 513 static void aweather_level2_init(AWeatherLevel2 *level2)
 514 {
 515 }
 516 static void aweather_level2_dispose(GObject *_level2)
 517 {
 518         AWeatherLevel2 *level2 = AWEATHER_LEVEL2(_level2);
 519         g_debug("AWeatherLevel2: dispose - %p", _level2);
 520         if (level2->volume) {
 521                 grits_viewer_remove(GRITS_OBJECT(level2->volume)->viewer,
 522                                 GRITS_OBJECT(level2->volume));
 523                 level2->volume = NULL;
 524         }
 525         G_OBJECT_CLASS(aweather_level2_parent_class)->dispose(_level2);
 526 }
 527 static void aweather_level2_finalize(GObject *_level2)
 528 {
 529         AWeatherLevel2 *level2 = AWEATHER_LEVEL2(_level2);
 530         g_debug("AWeatherLevel2: finalize - %p", _level2);
 531         RSL_free_radar(level2->radar);
 532         if (level2->sweep_tex)
 533                 glDeleteTextures(1, &level2->sweep_tex);
 534         G_OBJECT_CLASS(aweather_level2_parent_class)->finalize(_level2);
 535 }
 536 static void aweather_level2_class_init(AWeatherLevel2Class *klass)
 537 {
 538         G_OBJECT_CLASS(klass)->dispose  = aweather_level2_dispose;
 539         G_OBJECT_CLASS(klass)->finalize = aweather_level2_finalize;
 540         GRITS_OBJECT_CLASS(klass)->draw = aweather_level2_draw;
 541         GRITS_OBJECT_CLASS(klass)->hide = aweather_level2_hide;
 542 }