Pileus Git - grits/blob - src/plugins/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 "misc.h"
  27 #include "aweather-gui.h"
  28 #include "radar.h"
  29 #include "data.h"
  30 #include "marching.h"
  31
  32 static char *nexrad_base = "http://mesonet.agron.iastate.edu/data/";
  33
  34 /****************
  35  * GObject code *
  36  ****************/
  37 /* Plugin init */
  38 static void aweather_radar_plugin_init(AWeatherPluginInterface *iface);
  39 static void _aweather_radar_expose(AWeatherPlugin *_radar);
  40 G_DEFINE_TYPE_WITH_CODE(AWeatherRadar, aweather_radar, G_TYPE_OBJECT,
  41                 G_IMPLEMENT_INTERFACE(AWEATHER_TYPE_PLUGIN,
  42                         aweather_radar_plugin_init));
  43 static void aweather_radar_plugin_init(AWeatherPluginInterface *iface)
  44 {
  45         g_debug("AWeatherRadar: plugin_init");
  46         /* Add methods to the interface */
  47         iface->expose = _aweather_radar_expose;
  48 }
  49 /* Class/Object init */
  50 static void aweather_radar_init(AWeatherRadar *radar)
  51 {
  52         g_debug("AWeatherRadar: class_init");
  53         /* Set defaults */
  54         radar->gui           = NULL;
  55         radar->soup          = NULL;
  56         radar->cur_triangles = NULL;
  57         radar->cur_num_triangles = 0;
  58 }
  59 static void aweather_radar_dispose(GObject *gobject)
  60 {
  61         g_debug("AWeatherRadar: dispose");
  62         AWeatherRadar *self = AWEATHER_RADAR(gobject);
  63         /* Drop references */
  64         G_OBJECT_CLASS(aweather_radar_parent_class)->dispose(gobject);
  65 }
  66 static void aweather_radar_finalize(GObject *gobject)
  67 {
  68         g_debug("AWeatherRadar: finalize");
  69         AWeatherRadar *self = AWEATHER_RADAR(gobject);
  70         /* Free data */
  71         G_OBJECT_CLASS(aweather_radar_parent_class)->finalize(gobject);
  72
  73 }
  74 static void aweather_radar_class_init(AWeatherRadarClass *klass)
  75 {
  76         g_debug("AWeatherRadar: class_init");
  77         GObjectClass *gobject_class = (GObjectClass*)klass;
  78         gobject_class->dispose  = aweather_radar_dispose;
  79         gobject_class->finalize = aweather_radar_finalize;
  80 }
  81
  82 /**************************
  83  * Data loading functions *
  84  **************************/
  85 /* Convert a sweep to an 2d array of data points */
  86 static void bscan_sweep(AWeatherRadar *self, Sweep *sweep, colormap_t *colormap,
  87                 guint8 **data, int *width, int *height)
  88 {
  89         /* Calculate max number of bins */
  90         int max_bins = 0;
  91         for (int i = 0; i < sweep->h.nrays; i++)
  92                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  93
  94         /* Allocate buffer using max number of bins for each ray */
  95         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  96
  97         /* Fill the data */
  98         for (int ri = 0; ri < sweep->h.nrays; ri++) {
  99                 Ray *ray  = sweep->ray[ri];
 100                 for (int bi = 0; bi < ray->h.nbins; bi++) {
 101                         /* copy RGBA into buffer */
 102                         //guint val   = dz_f(ray->range[bi]);
 103                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
 104                         guint  buf_i = (ri*max_bins+bi)*4;
 105                         buf[buf_i+0] = colormap->data[val][0];
 106                         buf[buf_i+1] = colormap->data[val][1];
 107                         buf[buf_i+2] = colormap->data[val][2];
 108                         buf[buf_i+3] = colormap->data[val][3]; // TESTING
 109                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
 110                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
 111                                 buf[buf_i+3] = 0x00; // transparent
 112                         }
 113                 }
 114         }
 115
 116         /* set output */
 117         *width  = max_bins;
 118         *height = sweep->h.nrays;
 119         *data   = buf;
 120 }
 121
 122 /* Load a sweep as the active texture */
 123 static void load_sweep(AWeatherRadar *self, Sweep *sweep)
 124 {
 125         GisOpenGL *opengl = aweather_gui_get_opengl(self->gui);
 126         gis_opengl_begin(opengl);
 127         self->cur_sweep = sweep;
 128         int height, width;
 129         guint8 *data;
 130         bscan_sweep(self, sweep, self->cur_colormap, &data, &width, &height);
 131         glDeleteTextures(1, &self->cur_sweep_tex);
 132         glGenTextures(1, &self->cur_sweep_tex);
 133         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 134         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 135         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 136         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 137         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 138         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
 139                         GL_RGBA, GL_UNSIGNED_BYTE, data);
 140         g_free(data);
 141         gis_opengl_redraw(opengl);
 142         gis_opengl_end(opengl);
 143 }
 144
 145 static void load_colormap(AWeatherRadar *self, gchar *table)
 146 {
 147         /* Set colormap so we can draw it on expose */
 148         for (int i = 0; colormaps[i].name; i++)
 149                 if (g_str_equal(colormaps[i].name, table))
 150                         self->cur_colormap = &colormaps[i];
 151 }
 152
 153 /* Add selectors to the config area for the sweeps */
 154 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self);
 155 static void load_radar_gui(AWeatherRadar *self, Radar *radar)
 156 {
 157         /* Clear existing items */
 158         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 159         if (child)
 160                 gtk_widget_destroy(child);
 161
 162         gdouble elev;
 163         guint rows = 1, cols = 1, cur_cols;
 164         gchar row_label_str[64], col_label_str[64], button_str[64];
 165         GtkWidget *row_label, *col_label, *button = NULL, *elev_box = NULL;
 166         GtkWidget *table = gtk_table_new(rows, cols, FALSE);
 167
 168         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 169                 Volume *vol = radar->v[vi];
 170                 if (vol == NULL) continue;
 171                 rows++; cols = 1; elev = 0;
 172
 173                 /* Row label */
 174                 g_snprintf(row_label_str, 64, "<b>%s:</b>", vol->h.type_str);
 175                 row_label = gtk_label_new(row_label_str);
 176                 gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 177                 gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 178                 gtk_table_attach(GTK_TABLE(table), row_label,
 179                                 0,1, rows-1,rows, GTK_FILL,GTK_FILL, 5,0);
 180
 181                 for (guint si = 0; si < vol->h.nsweeps; si++) {
 182                         Sweep *sweep = vol->sweep[si];
 183                         if (sweep == NULL || sweep->h.elev == 0) continue;
 184                         if (sweep->h.elev != elev) {
 185                                 cols++;
 186                                 elev = sweep->h.elev;
 187
 188                                 /* Column label */
 189                                 g_object_get(table, "n-columns", &cur_cols, NULL);
 190                                 if (cols >  cur_cols) {
 191                                         g_snprintf(col_label_str, 64, "<b>%.2f°</b>", elev);
 192                                         col_label = gtk_label_new(col_label_str);
 193                                         gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 194                                         gtk_widget_set_size_request(col_label, 50, -1);
 195                                         gtk_table_attach(GTK_TABLE(table), col_label,
 196                                                         cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 197                                 }
 198
 199                                 elev_box = gtk_hbox_new(TRUE, 0);
 200                                 gtk_table_attach(GTK_TABLE(table), elev_box,
 201                                                 cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 202                         }
 203
 204
 205                         /* Button */
 206                         g_snprintf(button_str, 64, "%3.2f", elev);
 207                         button = gtk_radio_button_new_with_label_from_widget(
 208                                         GTK_RADIO_BUTTON(button), button_str);
 209                         gtk_widget_set_size_request(button, -1, 26);
 210                         //button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 211                         //gtk_widget_set_size_request(button, -1, 22);
 212                         g_object_set(button, "draw-indicator", FALSE, NULL);
 213                         gtk_box_pack_end(GTK_BOX(elev_box), button, TRUE, TRUE, 0);
 214
 215                         g_object_set_data(G_OBJECT(button), "type",  vol->h.type_str);
 216                         g_object_set_data(G_OBJECT(button), "sweep", sweep);
 217                         g_signal_connect(button, "clicked", G_CALLBACK(on_sweep_clicked), self);
 218                 }
 219         }
 220         gtk_container_add(GTK_CONTAINER(self->config_body), table);
 221         gtk_widget_show_all(table);
 222 }
 223
 224 static void _aweather_radar_grid_set(GRIDCELL *grid, int gi, Ray *ray, int bi)
 225 {
 226         Range range = ray->range[bi];
 227
 228         double angle = d2r(ray->h.azimuth);
 229         double tilt  = d2r(ray->h.elev);
 230
 231         double lx    = sin(angle);
 232         double ly    = cos(angle);
 233         double lz    = sin(tilt);
 234
 235         double dist   = bi*ray->h.gate_size + ray->h.range_bin1;
 236
 237         grid->p[gi].x = lx*dist;
 238         grid->p[gi].y = ly*dist;
 239         grid->p[gi].z = lz*dist;
 240
 241         guint8 val = (guint8)ray->h.f(ray->range[bi]);
 242         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
 243             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO ||
 244             val > 80)
 245                 val = 0;
 246         grid->val[gi] = (float)val;
 247         //g_debug("(%.2f,%.2f,%.2f) - (%.0f,%.0f,%.0f) = %d",
 248         //      angle, tilt, dist,
 249         //      grid->p[gi].x,
 250         //      grid->p[gi].y,
 251         //      grid->p[gi].z,
 252         //      val);
 253 }
 254
 255 /* Load a radar from a decompressed file */
 256 static void load_radar(AWeatherRadar *self, gchar *radar_file)
 257 {
 258         char *dir  = g_path_get_dirname(radar_file);
 259         char *site = g_path_get_basename(dir);
 260         g_free(dir);
 261         g_debug("AWeatherRadar: load_radar - Loading new radar");
 262         RSL_read_these_sweeps("all", NULL);
 263         Radar *radar = self->cur_radar = RSL_wsr88d_to_radar(radar_file, site);
 264         if (radar == NULL) {
 265                 g_warning("fail to load radar: path=%s, site=%s", radar_file, site);
 266                 g_free(site);
 267                 return;
 268         }
 269         g_free(site);
 270
 271 #ifdef MARCHING
 272         /* Load the surface */
 273         if (self->cur_triangles) {
 274                 g_free(self->cur_triangles);
 275                 self->cur_triangles = NULL;
 276         }
 277         self->cur_num_triangles = 0;
 278         int x = 1;
 279         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 280                 if (radar->v[vi] == NULL) continue;
 281
 282                 for (guint si = 0; si+1 < radar->v[vi]->h.nsweeps; si++) {
 283                         Sweep *sweep0 = radar->v[vi]->sweep[si+0];
 284                         Sweep *sweep1 = radar->v[vi]->sweep[si+1];
 285
 286                         //g_debug("_aweather_radar_expose: sweep[%3d-%3d] -- nrays = %d, %d",
 287                         //      si, si+1,sweep0->h.nrays, sweep1->h.nrays);
 288
 289                         /* Skip super->regular resolution switch for now */
 290                         if (sweep0 == NULL || sweep0->h.elev == 0 ||
 291                             sweep1 == NULL || sweep1->h.elev == 0 ||
 292                             sweep0->h.nrays != sweep1->h.nrays)
 293                                 continue;
 294
 295                         /* We repack the arrays so that raysX[0] is always north, etc */
 296                         Ray **rays0 = g_malloc0(sizeof(Ray*)*sweep0->h.nrays);
 297                         Ray **rays1 = g_malloc0(sizeof(Ray*)*sweep1->h.nrays);
 298
 299                         for (guint ri = 0; ri < sweep0->h.nrays; ri++)
 300                                 rays0[(guint)(sweep0->ray[ri]->h.azimuth * sweep0->h.nrays / 360)] =
 301                                         sweep0->ray[ri];
 302                         for (guint ri = 0; ri < sweep1->h.nrays; ri++)
 303                                 rays1[(guint)(sweep1->ray[ri]->h.azimuth * sweep1->h.nrays / 360)] =
 304                                         sweep1->ray[ri];
 305
 306                         for (guint ri = 0; ri+x < sweep0->h.nrays; ri+=x) {
 307                                 //g_debug("_aweather_radar_expose: ray[%3d-%3d] -- nbins = %d, %d, %d, %d",
 308                                 //      ri, ri+x,
 309                                 //      rays0[ri  ]->h.nbins,
 310                                 //      rays0[ri+1]->h.nbins,
 311                                 //      rays1[ri  ]->h.nbins,
 312                                 //      rays1[ri+1]->h.nbins);
 313
 314                                 for (guint bi = 0; bi+x < rays1[ri]->h.nbins; bi+=x) {
 315                                         GRIDCELL grid = {};
 316                                         _aweather_radar_grid_set(&grid, 7, rays0[(ri  )%sweep0->h.nrays], bi+x);
 317                                         _aweather_radar_grid_set(&grid, 6, rays0[(ri+x)%sweep0->h.nrays], bi+x);
 318                                         _aweather_radar_grid_set(&grid, 5, rays0[(ri+x)%sweep0->h.nrays], bi  );
 319                                         _aweather_radar_grid_set(&grid, 4, rays0[(ri  )%sweep0->h.nrays], bi  );
 320                                         _aweather_radar_grid_set(&grid, 3, rays1[(ri  )%sweep0->h.nrays], bi+x);
 321                                         _aweather_radar_grid_set(&grid, 2, rays1[(ri+x)%sweep0->h.nrays], bi+x);
 322                                         _aweather_radar_grid_set(&grid, 1, rays1[(ri+x)%sweep0->h.nrays], bi  );
 323                                         _aweather_radar_grid_set(&grid, 0, rays1[(ri  )%sweep0->h.nrays], bi  );
 324
 325                                         TRIANGLE tris[10];
 326                                         int n = march_one_cube(grid, 40, tris);
 327
 328                                         self->cur_triangles = g_realloc(self->cur_triangles,
 329                                                 (self->cur_num_triangles+n)*sizeof(TRIANGLE));
 330                                         for (int i = 0; i < n; i++) {
 331                                                 //g_debug("triangle: ");
 332                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[0].x, tris[i].p[0].y, tris[i].p[0].z);
 333                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[1].x, tris[i].p[1].y, tris[i].p[1].z);
 334                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[2].x, tris[i].p[2].y, tris[i].p[2].z);
 335                                                 self->cur_triangles[self->cur_num_triangles+i] = tris[i];
 336                                         }
 337                                         self->cur_num_triangles += n;
 338                                         //g_debug(" ");
 339                                 }
 340                         }
 341                 }
 342                 break; // Exit after first volume (reflectivity)
 343         }
 344 #endif
 345
 346         /* Load the first sweep by default */
 347         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 348                 g_warning("No sweeps found\n");
 349         } else {
 350                 /* load first available sweep */
 351                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 352                         if (radar->v[vi]== NULL) continue;
 353                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 354                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 355                                 load_colormap(self, radar->v[vi]->h.type_str);
 356                                 load_sweep(self, radar->v[vi]->sweep[si]);
 357                                 break;
 358                         }
 359                         break;
 360                 }
 361         }
 362
 363         load_radar_gui(self, radar);
 364 }
 365
 366 /* TODO: These update times functions are getting ugly... */
 367 static void update_times_gtk(AWeatherRadar *self, GList *times)
 368 {
 369         gchar *last_time = NULL;
 370         GRegex *regex = g_regex_new("^[A-Z]{4}_([0-9]{8}_[0-9]{4})$", 0, 0, NULL); // KLSX_20090622_2113
 371         GMatchInfo *info;
 372
 373         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(self->gui, "time"));
 374         GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
 375         gtk_list_store_clear(lstore);
 376         GtkTreeIter iter;
 377         times = g_list_reverse(times);
 378         for (GList *cur = times; cur; cur = cur->next) {
 379                 g_message("trying time %s", (gchar*)cur->data);
 380                 if (g_regex_match(regex, cur->data, 0, &info)) {
 381                         gchar *time = g_match_info_fetch(info, 1);
 382                         g_message("adding time %s", (gchar*)cur->data);
 383                         gtk_list_store_insert(lstore, &iter, 0);
 384                         gtk_list_store_set(lstore, &iter, 0, time, -1);
 385                         last_time = time;
 386                 }
 387         }
 388
 389         GisView *view = aweather_gui_get_view(self->gui);
 390         gis_view_set_time(view, last_time);
 391
 392         g_regex_unref(regex);
 393         g_list_foreach(times, (GFunc)g_free, NULL);
 394         g_list_free(times);
 395 }
 396 static void update_times_online_cb(char *path, gboolean updated, gpointer _self)
 397 {
 398         GList *times = NULL;
 399         gchar *data;
 400         gsize length;
 401         g_file_get_contents(path, &data, &length, NULL);
 402         gchar **lines = g_strsplit(data, "\n", -1);
 403         for (int i = 0; lines[i] && lines[i][0]; i++) {
 404                 char **parts = g_strsplit(lines[i], " ", 2);
 405                 times = g_list_prepend(times, g_strdup(parts[1]));
 406                 g_strfreev(parts);
 407         }
 408         g_strfreev(lines);
 409         g_free(data);
 410
 411         update_times_gtk(_self, times);
 412 }
 413 static void update_times(AWeatherRadar *self, GisView *view, char *site)
 414 {
 415         GisWorld *world = aweather_gui_get_world(self->gui);
 416         if (gis_world_get_offline(world)) {
 417                 GList *times = NULL;
 418                 gchar *path = g_build_filename(g_get_user_cache_dir(), PACKAGE, "nexrd2", "raw", site, NULL);
 419                 GDir *dir = g_dir_open(path, 0, NULL);
 420                 if (dir) {
 421                         const gchar *name;
 422                         while ((name = g_dir_read_name(dir))) {
 423                                 times = g_list_prepend(times, g_strdup(name));
 424                         }
 425                         g_dir_close(dir);
 426                 }
 427                 g_free(path);
 428                 update_times_gtk(self, times);
 429         } else {
 430                 gchar *path = g_strdup_printf("nexrd2/raw/%s/dir.list", site);
 431                 cache_file(nexrad_base, path, AWEATHER_REFRESH, NULL, update_times_online_cb, self);
 432                 /* update_times_gtk from update_times_online_cb */
 433         }
 434 }
 435
 436 /*****************
 437  * ASync helpers *
 438  *****************/
 439 typedef struct {
 440         AWeatherRadar *self;
 441         gchar *radar_file;
 442 } decompressed_t;
 443
 444 static void decompressed_cb(GPid pid, gint status, gpointer _udata)
 445 {
 446         decompressed_t *udata = _udata;
 447         if (status != 0) {
 448                 g_warning("wsr88ddec exited with status %d", status);
 449                 return;
 450         }
 451         load_radar(udata->self, udata->radar_file);
 452         g_spawn_close_pid(pid);
 453         g_free(udata->radar_file);
 454         g_free(udata);
 455 }
 456
 457 static void cache_chunk_cb(char *path, goffset cur, goffset total, gpointer _self)
 458 {
 459         AWeatherRadar *self = AWEATHER_RADAR(_self);
 460         double percent = (double)cur/total;
 461
 462         g_message("AWeatherRadar: cache_chunk_cb - %lld/%lld = %.2f%%",
 463                         cur, total, percent*100);
 464
 465         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(self->progress_bar), MIN(percent, 1.0));
 466
 467         gchar *msg = g_strdup_printf("Loading radar... %5.1f%% (%.2f/%.2f MB)",
 468                         percent*100, (double)cur/1000000, (double)total/1000000);
 469         gtk_label_set_text(GTK_LABEL(self->progress_label), msg);
 470         g_free(msg);
 471 }
 472
 473 static void cache_done_cb(char *path, gboolean updated, gpointer _self)
 474 {
 475         AWeatherRadar *self = AWEATHER_RADAR(_self);
 476         char *decompressed = g_strconcat(path, ".raw", NULL);
 477         if (!updated) {
 478                 load_radar(self, decompressed);
 479                 return;
 480         }
 481
 482         decompressed_t *udata = g_malloc(sizeof(decompressed_t));
 483         udata->self       = self;
 484         udata->radar_file = decompressed;
 485         g_debug("AWeatherRadar: cache_done_cb - File updated, decompressing..");
 486         char *argv[] = {"wsr88ddec", path, decompressed, NULL};
 487         GPid pid;
 488         GError *error = NULL;
 489         g_spawn_async(
 490                 NULL,    // const gchar *working_directory,
 491                 argv,    // gchar **argv,
 492                 NULL,    // gchar **envp,
 493                 G_SPAWN_SEARCH_PATH|
 494                 G_SPAWN_DO_NOT_REAP_CHILD,
 495                          // GSpawnFlags flags,
 496                 NULL,    // GSpawnChildSetupFunc child_setup,
 497                 NULL,    // gpointer user_data,
 498                 &pid,    // GPid *child_pid,
 499                 &error); // GError **error
 500         if (error) {
 501                 g_warning("failed to decompress WSR88D data: %s",
 502                                 error->message);
 503                 g_error_free(error);
 504         }
 505         g_child_watch_add(pid, decompressed_cb, udata);
 506         self->soup = NULL;
 507 }
 508
 509 /*************
 510  * Callbacks *
 511  *************/
 512 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self)
 513 {
 514         AWeatherRadar *self = AWEATHER_RADAR(_self);
 515         load_colormap(self, g_object_get_data(G_OBJECT(button), "type" ));
 516         load_sweep   (self, g_object_get_data(G_OBJECT(button), "sweep"));
 517 }
 518
 519 static void on_time_changed(GisView *view, const char *time, gpointer _self)
 520 {
 521         AWeatherRadar *self = AWEATHER_RADAR(_self);
 522         g_debug("AWeatherRadar: on_time_changed - setting time=%s", time);
 523         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 524         char *site = gis_view_get_site(view);
 525         char *path = g_strdup_printf("nexrd2/raw/%s/%s_%s", site, site, time);
 526
 527         /* Set up progress bar */
 528         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 529         if (child) gtk_widget_destroy(child);
 530
 531         GtkWidget *vbox = gtk_vbox_new(FALSE, 10);
 532         gtk_container_set_border_width(GTK_CONTAINER(vbox), 10);
 533         self->progress_bar   = gtk_progress_bar_new();
 534         self->progress_label = gtk_label_new("Loading radar...");
 535         gtk_box_pack_start(GTK_BOX(vbox), self->progress_bar,   FALSE, FALSE, 0);
 536         gtk_box_pack_start(GTK_BOX(vbox), self->progress_label, FALSE, FALSE, 0);
 537         gtk_container_add(GTK_CONTAINER(self->config_body), vbox);
 538         gtk_widget_show_all(self->config_body);
 539
 540         /* Clear radar */
 541         if (self->cur_radar)
 542                 RSL_free_radar(self->cur_radar);
 543         self->cur_radar = NULL;
 544         self->cur_sweep = NULL;
 545         gis_opengl_redraw(aweather_gui_get_opengl(self->gui));
 546
 547         /* Start loading the new radar */
 548         if (self->soup) {
 549                 soup_session_abort(self->soup);
 550                 self->soup = NULL;
 551         }
 552         if (gis_world_get_offline(aweather_gui_get_world(self->gui)))
 553                 self->soup = cache_file(nexrad_base, path, AWEATHER_ONCE,
 554                                 cache_chunk_cb, cache_done_cb, self);
 555         else
 556                 self->soup = cache_file(nexrad_base, path, AWEATHER_UPDATE,
 557                                 cache_chunk_cb, cache_done_cb, self);
 558         g_free(path);
 559 }
 560
 561 static void on_site_changed(GisView *view, char *site, gpointer _self)
 562 {
 563         AWeatherRadar *self = AWEATHER_RADAR(_self);
 564         g_debug("AWeatherRadar: on_site_changed - Loading wsr88d list for %s", site);
 565         update_times(self, view, site);
 566 }
 567
 568 static void on_refresh(GisWorld *world, gpointer _self)
 569 {
 570         AWeatherRadar *self = AWEATHER_RADAR(_self);
 571         GisView *view = aweather_gui_get_view(AWEATHER_RADAR(_self)->gui);
 572         char *site = gis_view_get_site(view);
 573         update_times(self, view, site);
 574 }
 575
 576 /***********
 577  * Methods *
 578  ***********/
 579 AWeatherRadar *aweather_radar_new(AWeatherGui *gui)
 580 {
 581         g_debug("AWeatherRadar: new");
 582         AWeatherRadar *self = g_object_new(AWEATHER_TYPE_RADAR, NULL);
 583         self->gui  = gui;
 584
 585         GtkWidget    *config  = aweather_gui_get_widget(gui, "tabs");
 586
 587         /* Add configuration tab */
 588         self->config_body = gtk_alignment_new(0, 0, 1, 1);
 589         gtk_container_set_border_width(GTK_CONTAINER(self->config_body), 5);
 590         gtk_container_add(GTK_CONTAINER(self->config_body), gtk_label_new("No radar loaded"));
 591         gtk_notebook_prepend_page(GTK_NOTEBOOK(config), self->config_body, gtk_label_new("Radar"));
 592
 593         /* Set up OpenGL Stuff */
 594         GisView  *view  = aweather_gui_get_view(gui);
 595         GisWorld *world = aweather_gui_get_world(gui);
 596         g_signal_connect(view,  "site-changed", G_CALLBACK(on_site_changed), self);
 597         g_signal_connect(view,  "time-changed", G_CALLBACK(on_time_changed), self);
 598         g_signal_connect(world, "refresh",      G_CALLBACK(on_refresh),      self);
 599
 600         on_site_changed(view, gis_view_get_site(view), self);
 601
 602         return self;
 603 }
 604
 605 static void _aweather_radar_expose(AWeatherPlugin *_self)
 606 {
 607         AWeatherRadar *self = AWEATHER_RADAR(_self);
 608         g_debug("AWeatherRadar: expose");
 609         if (self->cur_sweep == NULL)
 610                 return;
 611         Sweep *sweep = self->cur_sweep;
 612
 613 #ifdef MARCHING
 614         /* Draw the surface */
 615         glMatrixMode(GL_MODELVIEW);
 616         glPushMatrix();
 617         glDisable(GL_TEXTURE_2D);
 618         float light_ambient[]  = {0.1f, 0.1f, 0.0f};
 619         float light_diffuse[]  = {0.9f, 0.9f, 0.9f};
 620         float light_position[] = {-300000.0f, 500000.0f, 400000.0f, 1.0f};
 621         glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
 622         glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
 623         glLightfv(GL_LIGHT0, GL_POSITION, light_position);
 624         glEnable(GL_LIGHT0);
 625         glEnable(GL_LIGHTING);
 626         glEnable(GL_COLOR_MATERIAL);
 627         glColor4f(1,1,1,0.75);
 628         g_debug("ntri=%d", self->cur_num_triangles);
 629         glBegin(GL_TRIANGLES);
 630         for (int i = 0; i < self->cur_num_triangles; i++) {
 631                 TRIANGLE t = self->cur_triangles[i];
 632                 do_normal(t.p[0].x, t.p[0].y, t.p[0].z,
 633                           t.p[1].x, t.p[1].y, t.p[1].z,
 634                           t.p[2].x, t.p[2].y, t.p[2].z);
 635                 glVertex3f(t.p[0].x, t.p[0].y, t.p[0].z);
 636                 glVertex3f(t.p[1].x, t.p[1].y, t.p[1].z);
 637                 glVertex3f(t.p[2].x, t.p[2].y, t.p[2].z);
 638         }
 639         glEnd();
 640         glPopMatrix();
 641 #endif
 642
 643         /* Draw the rays */
 644         glDisable(GL_LIGHTING);
 645         glDisable(GL_COLOR_MATERIAL);
 646         glMatrixMode(GL_MODELVIEW);
 647         glPushMatrix();
 648         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 649         glEnable(GL_TEXTURE_2D);
 650         glDisable(GL_ALPHA_TEST);
 651         glColor4f(1,1,1,1);
 652         glBegin(GL_QUAD_STRIP);
 653         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 654                 Ray  *ray = NULL;
 655                 double angle = 0;
 656                 if (ri < sweep->h.nrays) {
 657                         ray = sweep->ray[ri];
 658                         angle = d2r(ray->h.azimuth - ((double)ray->h.beam_width/2.));
 659                 } else {
 660                         /* Do the right side of the last sweep */
 661                         ray = sweep->ray[ri-1];
 662                         angle = d2r(ray->h.azimuth + ((double)ray->h.beam_width/2.));
 663                 }
 664
 665                 double lx = sin(angle);
 666                 double ly = cos(angle);
 667
 668                 double near_dist = ray->h.range_bin1;
 669                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 670
 671                 /* (find middle of bin) / scale for opengl */
 672                 // near left
 673                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays-0.01);
 674                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 675
 676                 // far  left
 677                 // todo: correct range-height function
 678                 double height = sin(d2r(ray->h.elev)) * far_dist;
 679                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays-0.01);
 680                 glVertex3f(lx*far_dist,  ly*far_dist, height);
 681         }
 682         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 683         glEnd();
 684         glPopMatrix();
 685
 686         /* Texture debug */
 687         //glBegin(GL_QUADS);
 688         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 689         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 690         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 691         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 692         //glEnd();
 693
 694         /* Print the color table */
 695         glDisable(GL_TEXTURE_2D);
 696         glDisable(GL_DEPTH_TEST);
 697         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 698         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 699         glBegin(GL_QUADS);
 700         int i;
 701         for (i = 0; i < 256; i++) {
 702                 glColor4ub(self->cur_colormap->data[i][0],
 703                            self->cur_colormap->data[i][1],
 704                            self->cur_colormap->data[i][2],
 705                            self->cur_colormap->data[i][3]);
 706                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
 707                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
 708                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
 709                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
 710         }
 711         glEnd();
 712         glEnable(GL_DEPTH_TEST);
 713         glEnable(GL_ALPHA_TEST);
 714         glMatrixMode(GL_PROJECTION); glPopMatrix();
 715         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 716 }