Pileus Git - aweather/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 <gis/gis.h>
  27
  28 #include "radar.h"
  29 #include "marching.h"
  30 #include "../aweather-location.h"
  31
  32
  33 /**************************
  34  * Data loading functions *
  35  **************************/
  36 /* Convert a sweep to an 2d array of data points */
  37 static void _bscan_sweep(GisPluginRadar *self, Sweep *sweep, colormap_t *colormap,
  38                 guint8 **data, int *width, int *height)
  39 {
  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                         /* copy RGBA into buffer */
  53                         //guint val   = dz_f(ray->range[bi]);
  54                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
  55                         guint  buf_i = (ri*max_bins+bi)*4;
  56                         buf[buf_i+0] = colormap->data[val][0];
  57                         buf[buf_i+1] = colormap->data[val][1];
  58                         buf[buf_i+2] = colormap->data[val][2];
  59                         buf[buf_i+3] = colormap->data[val][3]; // TESTING
  60                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
  61                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
  62                                 buf[buf_i+3] = 0x00; // transparent
  63                         }
  64                 }
  65         }
  66
  67         /* set output */
  68         *width  = max_bins;
  69         *height = sweep->h.nrays;
  70         *data   = buf;
  71 }
  72
  73 /* Load a sweep as the active texture */
  74 static void _load_sweep(GisPluginRadar *self, Sweep *sweep)
  75 {
  76         GisViewer *viewer = self->viewer;
  77         gis_viewer_begin(viewer);
  78         self->cur_sweep = sweep;
  79         int height, width;
  80         guint8 *data;
  81         _bscan_sweep(self, sweep, self->cur_colormap, &data, &width, &height);
  82         glDeleteTextures(1, &self->cur_sweep_tex);
  83         glGenTextures(1, &self->cur_sweep_tex);
  84         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
  85         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  86         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  87         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  88         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  89         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
  90                         GL_RGBA, GL_UNSIGNED_BYTE, data);
  91         g_free(data);
  92         gtk_widget_queue_draw(GTK_WIDGET(viewer));
  93         gis_viewer_end(viewer);
  94 }
  95
  96 static void _load_colormap(GisPluginRadar *self, gchar *table)
  97 {
  98         /* Set colormap so we can draw it on expose */
  99         for (int i = 0; colormaps[i].name; i++)
 100                 if (g_str_equal(colormaps[i].name, table))
 101                         self->cur_colormap = &colormaps[i];
 102 }
 103
 104 /* Add selectors to the config area for the sweeps */
 105 static void _on_sweep_clicked(GtkRadioButton *button, gpointer _self);
 106 static void _load_radar_gui(GisPluginRadar *self, Radar *radar)
 107 {
 108         /* Clear existing items */
 109         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 110         if (child)
 111                 gtk_widget_destroy(child);
 112
 113         gdouble elev;
 114         guint rows = 1, cols = 1, cur_cols;
 115         gchar row_label_str[64], col_label_str[64], button_str[64];
 116         GtkWidget *row_label, *col_label, *button = NULL, *elev_box = NULL;
 117         GtkWidget *table = gtk_table_new(rows, cols, FALSE);
 118
 119         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 120                 Volume *vol = radar->v[vi];
 121                 if (vol == NULL) continue;
 122                 rows++; cols = 1; elev = 0;
 123
 124                 /* Row label */
 125                 g_snprintf(row_label_str, 64, "<b>%s:</b>", vol->h.type_str);
 126                 row_label = gtk_label_new(row_label_str);
 127                 gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 128                 gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 129                 gtk_table_attach(GTK_TABLE(table), row_label,
 130                                 0,1, rows-1,rows, GTK_FILL,GTK_FILL, 5,0);
 131
 132                 for (guint si = 0; si < vol->h.nsweeps; si++) {
 133                         Sweep *sweep = vol->sweep[si];
 134                         if (sweep == NULL || sweep->h.elev == 0) continue;
 135                         if (sweep->h.elev != elev) {
 136                                 cols++;
 137                                 elev = sweep->h.elev;
 138
 139                                 /* Column label */
 140                                 g_object_get(table, "n-columns", &cur_cols, NULL);
 141                                 if (cols >  cur_cols) {
 142                                         g_snprintf(col_label_str, 64, "<b>%.2f°</b>", elev);
 143                                         col_label = gtk_label_new(col_label_str);
 144                                         gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 145                                         gtk_widget_set_size_request(col_label, 50, -1);
 146                                         gtk_table_attach(GTK_TABLE(table), col_label,
 147                                                         cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 148                                 }
 149
 150                                 elev_box = gtk_hbox_new(TRUE, 0);
 151                                 gtk_table_attach(GTK_TABLE(table), elev_box,
 152                                                 cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 153                         }
 154
 155
 156                         /* Button */
 157                         g_snprintf(button_str, 64, "%3.2f", elev);
 158                         button = gtk_radio_button_new_with_label_from_widget(
 159                                         GTK_RADIO_BUTTON(button), button_str);
 160                         gtk_widget_set_size_request(button, -1, 26);
 161                         //button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 162                         //gtk_widget_set_size_request(button, -1, 22);
 163                         g_object_set(button, "draw-indicator", FALSE, NULL);
 164                         gtk_box_pack_end(GTK_BOX(elev_box), button, TRUE, TRUE, 0);
 165
 166                         g_object_set_data(G_OBJECT(button), "type",  vol->h.type_str);
 167                         g_object_set_data(G_OBJECT(button), "sweep", sweep);
 168                         g_signal_connect(button, "clicked", G_CALLBACK(_on_sweep_clicked), self);
 169                 }
 170         }
 171         gtk_container_add(GTK_CONTAINER(self->config_body), table);
 172         gtk_widget_show_all(table);
 173 }
 174
 175 static void _gis_plugin_radar_grid_set(GRIDCELL *grid, int gi, Ray *ray, int bi)
 176 {
 177         Range range = ray->range[bi];
 178
 179         double angle = deg2rad(ray->h.azimuth);
 180         double tilt  = deg2rad(ray->h.elev);
 181
 182         double lx    = sin(angle);
 183         double ly    = cos(angle);
 184         double lz    = sin(tilt);
 185
 186         double dist   = bi*ray->h.gate_size + ray->h.range_bin1;
 187
 188         grid->p[gi].x = lx*dist;
 189         grid->p[gi].y = ly*dist;
 190         grid->p[gi].z = lz*dist;
 191
 192         guint8 val = (guint8)ray->h.f(ray->range[bi]);
 193         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
 194             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO ||
 195             val > 80)
 196                 val = 0;
 197         grid->val[gi] = (float)val;
 198         //g_debug("(%.2f,%.2f,%.2f) - (%.0f,%.0f,%.0f) = %d",
 199         //      angle, tilt, dist,
 200         //      grid->p[gi].x,
 201         //      grid->p[gi].y,
 202         //      grid->p[gi].z,
 203         //      val);
 204 }
 205
 206 /* Load a radar from a decompressed file */
 207 static void _load_radar(GisPluginRadar *self, gchar *radar_file)
 208 {
 209         char *dir  = g_path_get_dirname(radar_file);
 210         char *site = g_path_get_basename(dir);
 211         g_free(dir);
 212         g_debug("GisPluginRadar: load_radar - Loading new radar");
 213         RSL_read_these_sweeps("all", NULL);
 214         Radar *radar = self->cur_radar = RSL_wsr88d_to_radar(radar_file, site);
 215         if (radar == NULL) {
 216                 g_warning("fail to load radar: path=%s, site=%s", radar_file, site);
 217                 g_free(site);
 218                 return;
 219         }
 220         g_free(site);
 221
 222 #ifdef MARCHING
 223         /* Load the surface */
 224         if (self->cur_triangles) {
 225                 g_free(self->cur_triangles);
 226                 self->cur_triangles = NULL;
 227         }
 228         self->cur_num_triangles = 0;
 229         int x = 1;
 230         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 231                 if (radar->v[vi] == NULL) continue;
 232
 233                 for (guint si = 0; si+1 < radar->v[vi]->h.nsweeps; si++) {
 234                         Sweep *sweep0 = radar->v[vi]->sweep[si+0];
 235                         Sweep *sweep1 = radar->v[vi]->sweep[si+1];
 236
 237                         //g_debug("GisPluginRadar: load_radar: sweep[%3d-%3d] -- nrays = %d, %d",
 238                         //      si, si+1,sweep0->h.nrays, sweep1->h.nrays);
 239
 240                         /* Skip super->regular resolution switch for now */
 241                         if (sweep0 == NULL || sweep0->h.elev == 0 ||
 242                             sweep1 == NULL || sweep1->h.elev == 0 ||
 243                             sweep0->h.nrays != sweep1->h.nrays)
 244                                 continue;
 245
 246                         /* We repack the arrays so that raysX[0] is always north, etc */
 247                         Ray **rays0 = g_malloc0(sizeof(Ray*)*sweep0->h.nrays);
 248                         Ray **rays1 = g_malloc0(sizeof(Ray*)*sweep1->h.nrays);
 249
 250                         for (guint ri = 0; ri < sweep0->h.nrays; ri++)
 251                                 rays0[(guint)(sweep0->ray[ri]->h.azimuth * sweep0->h.nrays / 360)] =
 252                                         sweep0->ray[ri];
 253                         for (guint ri = 0; ri < sweep1->h.nrays; ri++)
 254                                 rays1[(guint)(sweep1->ray[ri]->h.azimuth * sweep1->h.nrays / 360)] =
 255                                         sweep1->ray[ri];
 256
 257                         for (guint ri = 0; ri+x < sweep0->h.nrays; ri+=x) {
 258                                 //g_debug("GisPluginRadar: load_radar - ray[%3d-%3d] -- nbins = %d, %d, %d, %d",
 259                                 //      ri, ri+x,
 260                                 //      rays0[ri  ]->h.nbins,
 261                                 //      rays0[ri+1]->h.nbins,
 262                                 //      rays1[ri  ]->h.nbins,
 263                                 //      rays1[ri+1]->h.nbins);
 264
 265                                 for (guint bi = 0; bi+x < rays1[ri]->h.nbins; bi+=x) {
 266                                         GRIDCELL grid = {};
 267                                         _gis_plugin_radar_grid_set(&grid, 7, rays0[(ri  )%sweep0->h.nrays], bi+x);
 268                                         _gis_plugin_radar_grid_set(&grid, 6, rays0[(ri+x)%sweep0->h.nrays], bi+x);
 269                                         _gis_plugin_radar_grid_set(&grid, 5, rays0[(ri+x)%sweep0->h.nrays], bi  );
 270                                         _gis_plugin_radar_grid_set(&grid, 4, rays0[(ri  )%sweep0->h.nrays], bi  );
 271                                         _gis_plugin_radar_grid_set(&grid, 3, rays1[(ri  )%sweep0->h.nrays], bi+x);
 272                                         _gis_plugin_radar_grid_set(&grid, 2, rays1[(ri+x)%sweep0->h.nrays], bi+x);
 273                                         _gis_plugin_radar_grid_set(&grid, 1, rays1[(ri+x)%sweep0->h.nrays], bi  );
 274                                         _gis_plugin_radar_grid_set(&grid, 0, rays1[(ri  )%sweep0->h.nrays], bi  );
 275
 276                                         TRIANGLE tris[10];
 277                                         int n = march_one_cube(grid, 40, tris);
 278
 279                                         self->cur_triangles = g_realloc(self->cur_triangles,
 280                                                 (self->cur_num_triangles+n)*sizeof(TRIANGLE));
 281                                         for (int i = 0; i < n; i++) {
 282                                                 //g_debug("triangle: ");
 283                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[0].x, tris[i].p[0].y, tris[i].p[0].z);
 284                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[1].x, tris[i].p[1].y, tris[i].p[1].z);
 285                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[2].x, tris[i].p[2].y, tris[i].p[2].z);
 286                                                 self->cur_triangles[self->cur_num_triangles+i] = tris[i];
 287                                         }
 288                                         self->cur_num_triangles += n;
 289                                         //g_debug(" ");
 290                                 }
 291                         }
 292                 }
 293                 break; // Exit after first volume (reflectivity)
 294         }
 295 #endif
 296
 297         /* Load the first sweep by default */
 298         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 299                 g_warning("No sweeps found\n");
 300         } else {
 301                 /* load first available sweep */
 302                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 303                         if (radar->v[vi]== NULL) continue;
 304                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 305                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 306                                 _load_colormap(self, radar->v[vi]->h.type_str);
 307                                 _load_sweep(self, radar->v[vi]->sweep[si]);
 308                                 break;
 309                         }
 310                         break;
 311                 }
 312         }
 313
 314         _load_radar_gui(self, radar);
 315 }
 316
 317
 318 /*****************
 319  * ASync helpers *
 320  *****************/
 321 typedef struct {
 322         GisPluginRadar *self;
 323         gchar *radar_file;
 324 } decompressed_t;
 325
 326 static void _decompressed_cb(GPid pid, gint status, gpointer _udata)
 327 {
 328         g_debug("GisPluginRadar: decompressed_cb");
 329         decompressed_t *udata = _udata;
 330         if (status != 0) {
 331                 g_warning("wsr88ddec exited with status %d", status);
 332                 return;
 333         }
 334         _load_radar(udata->self, udata->radar_file);
 335         g_spawn_close_pid(pid);
 336         g_free(udata->radar_file);
 337         g_free(udata);
 338 }
 339
 340 static void _cache_chunk_cb(char *path, goffset cur, goffset total, gpointer _self)
 341 {
 342         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 343         double percent = (double)cur/total;
 344
 345         //g_debug("GisPluginRadar: cache_chunk_cb - %lld/%lld = %.2f%%",
 346         //              cur, total, percent*100);
 347
 348         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(self->progress_bar), MIN(percent, 1.0));
 349
 350         gchar *msg = g_strdup_printf("Loading radar... %5.1f%% (%.2f/%.2f MB)",
 351                         percent*100, (double)cur/1000000, (double)total/1000000);
 352         gtk_label_set_text(GTK_LABEL(self->progress_label), msg);
 353         g_free(msg);
 354 }
 355
 356 static void _cache_done_cb(char *path, gboolean updated, gpointer _self)
 357 {
 358         g_debug("GisPluginRadar: cache_done_cb - updated = %d", updated);
 359         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 360         char *decompressed = g_strconcat(path, ".raw", NULL);
 361         if (!updated && g_file_test(decompressed, G_FILE_TEST_EXISTS)) {
 362                 _load_radar(self, decompressed);
 363                 return;
 364         }
 365
 366         decompressed_t *udata = g_malloc(sizeof(decompressed_t));
 367         udata->self       = self;
 368         udata->radar_file = decompressed;
 369         g_debug("GisPluginRadar: cache_done_cb - File updated, decompressing..");
 370         char *argv[] = {"wsr88ddec", path, decompressed, NULL};
 371         GPid pid;
 372         GError *error = NULL;
 373         g_spawn_async(
 374                 NULL,    // const gchar *working_directory,
 375                 argv,    // gchar **argv,
 376                 NULL,    // gchar **envp,
 377                 G_SPAWN_SEARCH_PATH|
 378                 G_SPAWN_DO_NOT_REAP_CHILD,
 379                          // GSpawnFlags flags,
 380                 NULL,    // GSpawnChildSetupFunc child_setup,
 381                 NULL,    // gpointer user_data,
 382                 &pid,    // GPid *child_pid,
 383                 &error); // GError **error
 384         if (error) {
 385                 gchar *message = g_strdup_printf("Unable to decompress WSR88D data: %s",
 386                                 error->message);
 387                 g_warning("%s", message);
 388                 GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 389                 if (child)
 390                         gtk_widget_destroy(child);
 391                 gtk_container_add(GTK_CONTAINER(self->config_body), gtk_label_new(message));
 392                 gtk_widget_show_all(self->config_body);
 393                 g_error_free(error);
 394                 g_free(message);
 395         }
 396         g_child_watch_add(pid, _decompressed_cb, udata);
 397         self->soup = NULL;
 398 }
 399
 400 static void _set_radar(GisPluginRadar *self, const char *site, const char *time)
 401 {
 402         if (!site || !time)
 403                 return;
 404         g_debug("GisPluginRadar: set_radar - %s - %s", site, time);
 405
 406         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 407         char *path = g_strdup_printf("nexrd2/raw/%s/%s_%s", site, site, time);
 408
 409         /* Set up progress bar */
 410         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 411         if (child) gtk_widget_destroy(child);
 412
 413         GtkWidget *vbox = gtk_vbox_new(FALSE, 10);
 414         gtk_container_set_border_width(GTK_CONTAINER(vbox), 10);
 415         self->progress_bar   = gtk_progress_bar_new();
 416         self->progress_label = gtk_label_new("Loading radar...");
 417         gtk_box_pack_start(GTK_BOX(vbox), self->progress_bar,   FALSE, FALSE, 0);
 418         gtk_box_pack_start(GTK_BOX(vbox), self->progress_label, FALSE, FALSE, 0);
 419         gtk_container_add(GTK_CONTAINER(self->config_body), vbox);
 420         gtk_widget_show_all(self->config_body);
 421
 422         /* Clear radar */
 423         if (self->cur_radar)
 424                 RSL_free_radar(self->cur_radar);
 425         self->cur_radar = NULL;
 426         self->cur_sweep = NULL;
 427         gtk_widget_queue_draw(GTK_WIDGET(self->viewer));
 428
 429         /* Start loading the new radar */
 430         if (self->soup) {
 431                 soup_session_abort(self->soup);
 432                 self->soup = NULL;
 433         }
 434         gchar *base = gis_prefs_get_string(self->prefs, "aweather/nexrad_url", NULL);
 435         if (gis_viewer_get_offline(self->viewer))
 436                 self->soup = cache_file(base, path, GIS_NEVER,
 437                                 NULL, _cache_done_cb, self);
 438         else
 439                 self->soup = cache_file(base, path, GIS_UPDATE,
 440                                 _cache_chunk_cb, _cache_done_cb, self);
 441         g_free(path);
 442 }
 443
 444
 445 /*************
 446  * Callbacks *
 447  *************/
 448 static void _on_sweep_clicked(GtkRadioButton *button, gpointer _self)
 449 {
 450         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 451         _load_colormap(self, g_object_get_data(G_OBJECT(button), "type" ));
 452         _load_sweep   (self, g_object_get_data(G_OBJECT(button), "sweep"));
 453 }
 454
 455 static void _on_time_changed(GisViewer *viewer, const char *time, gpointer _self)
 456 {
 457         g_debug("GisPluginRadar: _on_time_changed");
 458         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 459         g_free(self->cur_time);
 460         self->cur_time = g_strdup(time);
 461         _set_radar(self, self->cur_site, self->cur_time);
 462 }
 463
 464 static void _on_location_changed(GisViewer *viewer,
 465                 gdouble lat, gdouble lon, gdouble elev,
 466                 gpointer _self)
 467 {
 468         g_debug("GisPluginRadar: _on_location_changed");
 469         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 470         gdouble min_dist = EARTH_R / 5;
 471         city_t *city, *min_city = NULL;
 472         for (city = cities; city->type; city++) {
 473                 if (city->type != LOCATION_CITY)
 474                         continue;
 475                 gdouble city_loc[3] = {};
 476                 gdouble eye_loc[3]  = {lat, lon, elev};
 477                 lle2xyz(city->lat, city->lon, city->elev,
 478                                 &city_loc[0], &city_loc[1], &city_loc[2]);
 479                 lle2xyz(lat, lon, elev,
 480                                 &eye_loc[0], &eye_loc[1], &eye_loc[2]);
 481                 gdouble dist = distd(city_loc, eye_loc);
 482                 if (dist < min_dist) {
 483                         min_dist = dist;
 484                         min_city = city;
 485                 }
 486         }
 487         static city_t *last_city = NULL;
 488         if (min_city && min_city != last_city) {
 489                 self->cur_site = min_city->code;
 490                 _set_radar(self, self->cur_site, self->cur_time);
 491         }
 492         last_city = min_city;
 493 }
 494
 495 static gpointer _draw_radar(GisCallback *callback, gpointer _self)
 496 {
 497         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 498         if (self->cur_sweep == NULL)
 499                 return NULL;
 500         g_debug("GisPluginRadar: _draw_radar");
 501         Sweep *sweep = self->cur_sweep;
 502
 503 #ifdef MARCHING
 504         /* Draw the surface */
 505         glMatrixMode(GL_MODELVIEW);
 506         glPushMatrix();
 507         glDisable(GL_TEXTURE_2D);
 508         float light_ambient[]  = {0.1f, 0.1f, 0.0f};
 509         float light_diffuse[]  = {0.9f, 0.9f, 0.9f};
 510         float light_position[] = {-300000.0f, 500000.0f, 400000.0f, 1.0f};
 511         glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
 512         glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
 513         glLightfv(GL_LIGHT0, GL_POSITION, light_position);
 514         glEnable(GL_LIGHT0);
 515         glEnable(GL_LIGHTING);
 516         glEnable(GL_COLOR_MATERIAL);
 517         glColor4f(1,1,1,0.75);
 518         g_debug("ntri=%d", self->cur_num_triangles);
 519         glBegin(GL_TRIANGLES);
 520         for (int i = 0; i < self->cur_num_triangles; i++) {
 521                 TRIANGLE t = self->cur_triangles[i];
 522                 do_normal(t.p[0].x, t.p[0].y, t.p[0].z,
 523                           t.p[1].x, t.p[1].y, t.p[1].z,
 524                           t.p[2].x, t.p[2].y, t.p[2].z);
 525                 glVertex3f(t.p[0].x, t.p[0].y, t.p[0].z);
 526                 glVertex3f(t.p[1].x, t.p[1].y, t.p[1].z);
 527                 glVertex3f(t.p[2].x, t.p[2].y, t.p[2].z);
 528         }
 529         glEnd();
 530         glPopMatrix();
 531 #endif
 532
 533         g_debug("GisPluginRadar: _draw_radar - setting camera");
 534         Radar_header *h = &self->cur_radar->h;
 535         gdouble lat  = (double)h->latd + (double)h->latm/60 + (double)h->lats/(60*60);
 536         gdouble lon  = (double)h->lond + (double)h->lonm/60 + (double)h->lons/(60*60);
 537         gdouble elev = h->height;
 538         gis_viewer_center_position(self->viewer, lat, lon, elev);
 539
 540         glDisable(GL_ALPHA_TEST);
 541         glDisable(GL_CULL_FACE);
 542         glDisable(GL_DEPTH_TEST);
 543         glDisable(GL_LIGHTING);
 544         glEnable(GL_TEXTURE_2D);
 545         glColor4f(1,1,1,1);
 546
 547         /* Draw the rays */
 548         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 549         glBegin(GL_QUAD_STRIP);
 550         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 551                 Ray  *ray = NULL;
 552                 double angle = 0;
 553                 if (ri < sweep->h.nrays) {
 554                         ray = sweep->ray[ri];
 555                         angle = deg2rad(ray->h.azimuth - ((double)ray->h.beam_width/2.));
 556                 } else {
 557                         /* Do the right side of the last sweep */
 558                         ray = sweep->ray[ri-1];
 559                         angle = deg2rad(ray->h.azimuth + ((double)ray->h.beam_width/2.));
 560                 }
 561
 562                 double lx = sin(angle);
 563                 double ly = cos(angle);
 564
 565                 double near_dist = ray->h.range_bin1;
 566                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 567
 568                 /* (find middle of bin) / scale for opengl */
 569                 // near left
 570                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays-0.01);
 571                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 572
 573                 // far  left
 574                 // todo: correct range-height function
 575                 double height = sin(deg2rad(ray->h.elev)) * far_dist;
 576                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays-0.01);
 577                 glVertex3f(lx*far_dist,  ly*far_dist, height);
 578         }
 579         glEnd();
 580         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 581
 582         /* Texture debug */
 583         //glBegin(GL_QUADS);
 584         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 585         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 586         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 587         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 588         //glEnd();
 589
 590         return NULL;
 591 }
 592
 593 static gpointer _draw_hud(GisCallback *callback, gpointer _self)
 594 {
 595         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 596         if (self->cur_sweep == NULL)
 597                 return NULL;
 598         g_debug("GisPluginRadar: _draw_hud");
 599
 600         /* Print the color table */
 601         glMatrixMode(GL_MODELVIEW ); glLoadIdentity();
 602         glMatrixMode(GL_PROJECTION); glLoadIdentity();
 603         glDisable(GL_TEXTURE_2D);
 604         glDisable(GL_ALPHA_TEST);
 605         glDisable(GL_CULL_FACE);
 606         glDisable(GL_LIGHTING);
 607         glEnable(GL_COLOR_MATERIAL);
 608         glBegin(GL_QUADS);
 609         int i;
 610         for (i = 0; i < 256; i++) {
 611                 glColor4ubv(self->cur_colormap->data[i]);
 612                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
 613                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
 614                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
 615                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
 616         }
 617         glEnd();
 618
 619         return NULL;
 620 }
 621
 622
 623 /***********
 624  * Methods *
 625  ***********/
 626 GisPluginRadar *gis_plugin_radar_new(GisViewer *viewer, GisPrefs *prefs)
 627 {
 628         /* TODO: move to constructor if possible */
 629         g_debug("GisPluginRadar: new");
 630         GisPluginRadar *self = g_object_new(GIS_TYPE_PLUGIN_RADAR, NULL);
 631         self->viewer = viewer;
 632         self->prefs  = prefs;
 633         self->time_changed_id = g_signal_connect(viewer, "time-changed",
 634                         G_CALLBACK(_on_time_changed), self);
 635         self->location_changed_id = g_signal_connect(viewer, "location-changed",
 636                         G_CALLBACK(_on_location_changed), self);
 637
 638         /* Add renderers */
 639         GisCallback *callback;
 640
 641         callback = gis_callback_new(_draw_radar, self);
 642         gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_WORLD, TRUE);
 643
 644         callback = gis_callback_new(_draw_hud, self);
 645         gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_HUD, FALSE);
 646
 647         return self;
 648 }
 649
 650 static GtkWidget *gis_plugin_radar_get_config(GisPlugin *_self)
 651 {
 652         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 653         return self->config_body;
 654 }
 655
 656
 657 /****************
 658  * GObject code *
 659  ****************/
 660 /* Plugin init */
 661 static void gis_plugin_radar_plugin_init(GisPluginInterface *iface);
 662 G_DEFINE_TYPE_WITH_CODE(GisPluginRadar, gis_plugin_radar, G_TYPE_OBJECT,
 663                 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
 664                         gis_plugin_radar_plugin_init));
 665 static void gis_plugin_radar_plugin_init(GisPluginInterface *iface)
 666 {
 667         g_debug("GisPluginRadar: plugin_init");
 668         /* Add methods to the interface */
 669         iface->get_config = gis_plugin_radar_get_config;
 670 }
 671 /* Class/Object init */
 672 static void gis_plugin_radar_init(GisPluginRadar *self)
 673 {
 674         g_debug("GisPluginRadar: class_init");
 675         /* Set defaults */
 676         self->soup          = NULL;
 677         self->cur_triangles = NULL;
 678         self->cur_num_triangles = 0;
 679
 680         self->config_body = gtk_alignment_new(0, 0, 1, 1);
 681         gtk_container_set_border_width(GTK_CONTAINER(self->config_body), 5);
 682         gtk_container_add(GTK_CONTAINER(self->config_body), gtk_label_new("No radar loaded"));
 683 }
 684 static void gis_plugin_radar_dispose(GObject *gobject)
 685 {
 686         g_debug("GisPluginRadar: dispose");
 687         GisPluginRadar *self = GIS_PLUGIN_RADAR(gobject);
 688         g_signal_handler_disconnect(self->viewer, self->time_changed_id);
 689         /* Drop references */
 690         G_OBJECT_CLASS(gis_plugin_radar_parent_class)->dispose(gobject);
 691 }
 692 static void gis_plugin_radar_finalize(GObject *gobject)
 693 {
 694         g_debug("GisPluginRadar: finalize");
 695         GisPluginRadar *self = GIS_PLUGIN_RADAR(gobject);
 696         /* Free data */
 697         G_OBJECT_CLASS(gis_plugin_radar_parent_class)->finalize(gobject);
 698
 699 }
 700 static void gis_plugin_radar_class_init(GisPluginRadarClass *klass)
 701 {
 702         g_debug("GisPluginRadar: class_init");
 703         GObjectClass *gobject_class = (GObjectClass*)klass;
 704         gobject_class->dispose  = gis_plugin_radar_dispose;
 705         gobject_class->finalize = gis_plugin_radar_finalize;
 706 }
 707