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

   1 /*
   2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <config.h>
  19 #include <gtk/gtk.h>
  20 #include <gtk/gtkgl.h>
  21 #include <GL/gl.h>
  22 #include <math.h>
  23 #include <rsl.h>
  24
  25 #include "aweather-gui.h"
  26 #include "plugin-radar.h"
  27 #include "data.h"
  28
  29 /****************
  30  * GObject code *
  31  ****************/
  32 static void aweather_radar_plugin_init(AWeatherPluginInterface *iface);
  33 static void _aweather_radar_expose(AWeatherPlugin *_radar);
  34 G_DEFINE_TYPE_WITH_CODE(AWeatherRadar, aweather_radar, G_TYPE_OBJECT,
  35                 G_IMPLEMENT_INTERFACE(AWEATHER_TYPE_PLUGIN,
  36                         aweather_radar_plugin_init));
  37 static void aweather_radar_class_init(AWeatherRadarClass *klass)
  38 {
  39         GObjectClass *object_class = (GObjectClass*)klass;
  40 }
  41 static void aweather_radar_plugin_init(AWeatherPluginInterface *iface)
  42 {
  43         /* Add methods to the interface */
  44         iface->expose = _aweather_radar_expose;
  45 }
  46 static void aweather_radar_init(AWeatherRadar *radar)
  47 {
  48         /* Set defaults */
  49         radar->gui = NULL;
  50 }
  51
  52 /**************************
  53  * Data loading functions *
  54  **************************/
  55 /* Convert a sweep to an 2d array of data points */
  56 static void bscan_sweep(AWeatherRadar *self, Sweep *sweep, colormap_t *colormap,
  57                 guint8 **data, int *width, int *height)
  58 {
  59         /* Calculate max number of bins */
  60         int i, max_bins = 0;
  61         for (i = 0; i < sweep->h.nrays; i++)
  62                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  63
  64         /* Allocate buffer using max number of bins for each ray */
  65         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  66
  67         /* Fill the data */
  68         int ri, bi;
  69         for (ri = 0; ri < sweep->h.nrays; ri++) {
  70                 Ray *ray  = sweep->ray[ri];
  71                 for (bi = 0; bi < ray->h.nbins; bi++) {
  72                         /* copy RGBA into buffer */
  73                         //guint val   = dz_f(ray->range[bi]);
  74                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
  75                         guint  buf_i = (ri*max_bins+bi)*4;
  76                         buf[buf_i+0] = colormap->data[val][0];
  77                         buf[buf_i+1] = colormap->data[val][1];
  78                         buf[buf_i+2] = colormap->data[val][2];
  79                         buf[buf_i+3] = colormap->data[val][3];
  80                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
  81                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
  82                                 buf[buf_i+3] = 0x00; // transparent
  83                         }
  84                 }
  85         }
  86
  87         /* set output */
  88         *width  = max_bins;
  89         *height = sweep->h.nrays;
  90         *data   = buf;
  91 }
  92
  93 /* Load a sweep as the active texture */
  94 static void load_sweep(AWeatherRadar *self, Sweep *sweep)
  95 {
  96         aweather_gui_gl_begin(self->gui);
  97         self->cur_sweep = sweep;
  98         int height, width;
  99         guint8 *data;
 100         bscan_sweep(self, sweep, self->cur_colormap, &data, &width, &height);
 101         glDeleteTextures(1, &self->cur_sweep_tex);
 102         glGenTextures(1, &self->cur_sweep_tex);
 103         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 104         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 105         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 106         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 107         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 108         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
 109                         GL_RGBA, GL_UNSIGNED_BYTE, data);
 110         g_free(data);
 111         aweather_gui_gl_redraw(self->gui);
 112         aweather_gui_gl_end(self->gui);
 113 }
 114
 115 static void load_colormap(AWeatherRadar *self, gchar *table)
 116 {
 117         /* Set colormap so we can draw it on expose */
 118         for (int i = 0; colormaps[i].name; i++)
 119                 if (g_str_equal(colormaps[i].name, table))
 120                         self->cur_colormap = &colormaps[i];
 121 }
 122
 123 /* Add selectors to the config area for the sweeps */
 124 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self);
 125 static void load_radar_gui(AWeatherRadar *self, Radar *radar)
 126 {
 127         /* Clear existing items */
 128         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 129         if (child)
 130                 gtk_widget_destroy(child);
 131
 132         gdouble elev;
 133         guint rows = 1, cols = 1, cur_cols;
 134         gchar row_label_str[64], col_label_str[64], button_str[64];
 135         GtkWidget *row_label, *col_label, *button = NULL, *elev_box;
 136         GtkWidget *table = gtk_table_new(rows, cols, FALSE);
 137
 138         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 139                 Volume *vol = radar->v[vi];
 140                 if (vol == NULL) continue;
 141                 rows++; cols = 1; elev = 0;
 142
 143                 /* Row label */
 144                 g_snprintf(row_label_str, 64, "<b>%s:</b>", vol->h.type_str);
 145                 row_label = gtk_label_new(row_label_str);
 146                 gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 147                 gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 148                 gtk_table_attach(GTK_TABLE(table), row_label,
 149                                 0,1, rows-1,rows, GTK_FILL,GTK_FILL, 5,0);
 150
 151                 for (guint si = 0; si < vol->h.nsweeps; si++) {
 152                         Sweep *sweep = vol->sweep[si];
 153                         if (sweep == NULL || sweep->h.elev == 0) continue;
 154                         if (sweep->h.elev != elev) {
 155                                 cols++;
 156                                 elev = sweep->h.elev;
 157
 158                                 /* Column label */
 159                                 g_object_get(table, "n-columns", &cur_cols, NULL);
 160                                 if (cols >  cur_cols) {
 161                                         g_snprintf(col_label_str, 64, "<b>%.2f°</b>", elev);
 162                                         col_label = gtk_label_new(col_label_str);
 163                                         gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 164                                         gtk_widget_set_size_request(col_label, 40, -1);
 165                                         gtk_table_attach(GTK_TABLE(table), col_label,
 166                                                         cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 167                                 }
 168
 169                                 elev_box = gtk_hbox_new(TRUE, 0);
 170                                 gtk_table_attach(GTK_TABLE(table), elev_box,
 171                                                 cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 172                         }
 173
 174
 175                         /* Button */
 176                         g_snprintf(button_str, 64, "%3.2f", elev);
 177                         button = gtk_radio_button_new_with_label_from_widget(
 178                                         GTK_RADIO_BUTTON(button), button_str);
 179                         gtk_widget_set_size_request(button, -1, 26);
 180                         //button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 181                         //gtk_widget_set_size_request(button, -1, 22);
 182                         g_object_set(button, "draw-indicator", FALSE, NULL);
 183                         gtk_box_pack_end(GTK_BOX(elev_box), button, TRUE, TRUE, 0);
 184
 185                         g_object_set_data(G_OBJECT(button), "type",  vol->h.type_str);
 186                         g_object_set_data(G_OBJECT(button), "sweep", sweep);
 187                         g_signal_connect(button, "clicked", G_CALLBACK(on_sweep_clicked), self);
 188                 }
 189         }
 190         gtk_container_add(GTK_CONTAINER(self->config_body), table);
 191         gtk_widget_show_all(table);
 192 }
 193
 194 /* Load a radar from a decompressed file */
 195 static void load_radar(AWeatherRadar *self, gchar *radar_file)
 196 {
 197         char *dir  = g_path_get_dirname(radar_file);
 198         char *site = g_path_get_basename(dir);
 199         g_free(dir);
 200         g_debug("AWeatherRadar: load_radar - Loading new radar");
 201         RSL_read_these_sweeps("all", NULL);
 202         Radar *radar = self->cur_radar = RSL_wsr88d_to_radar(radar_file, site);
 203         if (radar == NULL) {
 204                 g_warning("fail to load radar: path=%s, site=%s", radar_file, site);
 205                 g_free(site);
 206                 return;
 207         }
 208         g_free(site);
 209
 210         /* Load the first sweep by default */
 211         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 212                 g_warning("No sweeps found\n");
 213         } else {
 214                 /* load first available sweep */
 215                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 216                         if (radar->v[vi]== NULL) continue;
 217                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 218                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 219                                 load_colormap(self, radar->v[vi]->h.type_str);
 220                                 load_sweep(self, radar->v[vi]->sweep[si]);
 221                                 break;
 222                         }
 223                         break;
 224                 }
 225         }
 226
 227         load_radar_gui(self, radar);
 228 }
 229
 230 static void update_times(AWeatherRadar *self, char *site, char **last_time)
 231 {
 232         char *list_uri = g_strdup_printf(
 233                         "http://mesonet.agron.iastate.edu/data/nexrd2/raw/K%s/dir.list",
 234                         site);
 235         GFile *list    = g_file_new_for_uri(list_uri);
 236         g_free(list_uri);
 237
 238         gchar *data;
 239         gsize length;
 240         GError *error = NULL;
 241         g_file_load_contents(list, NULL, &data, &length, NULL, &error);
 242         g_object_unref(list);
 243         if (error) {
 244                 g_warning("Error loading list for %s: %s", site, error->message);
 245                 g_error_free(error);
 246                 return;
 247         }
 248         gchar **lines = g_strsplit(data, "\n", -1);
 249         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(self->gui, "time"));
 250         GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
 251         gtk_list_store_clear(lstore);
 252         GtkTreeIter iter;
 253         for (int i = 0; lines[i] && lines[i][0]; i++) {
 254                 // format: `841907 KABR_20090510_0159'
 255                 //g_message("\tadding %p [%s]", lines[i], lines[i]);
 256                 char **parts = g_strsplit(lines[i], " ", 2);
 257                 char *time = parts[1]+5;
 258                 gtk_list_store_insert(lstore, &iter, 0);
 259                 gtk_list_store_set(lstore, &iter, 0, time, -1);
 260                 g_strfreev(parts);
 261         }
 262
 263         if (last_time)
 264                 gtk_tree_model_get(GTK_TREE_MODEL(lstore), &iter, 0, last_time, -1);
 265
 266         g_free(data);
 267         g_strfreev(lines);
 268 }
 269
 270 /*****************
 271  * ASync helpers *
 272  *****************/
 273 typedef struct {
 274         AWeatherRadar *self;
 275         gchar *radar_file;
 276 } decompressed_t;
 277
 278 static void decompressed_cb(GPid pid, gint status, gpointer _udata)
 279 {
 280         decompressed_t *udata = _udata;
 281         if (status != 0) {
 282                 g_warning("wsr88ddec exited with status %d", status);
 283                 return;
 284         }
 285         load_radar(udata->self, udata->radar_file);
 286         g_spawn_close_pid(pid);
 287         g_free(udata->radar_file);
 288         g_free(udata);
 289 }
 290
 291 static void cached_cb(char *path, gboolean updated, gpointer _self)
 292 {
 293         AWeatherRadar *self = AWEATHER_RADAR(_self);
 294         char *decompressed = g_strconcat(path, ".raw", NULL);
 295         if (!updated) {
 296                 load_radar(self, decompressed);
 297                 return;
 298         }
 299
 300         decompressed_t *udata = g_malloc(sizeof(decompressed_t));
 301         udata->self       = self;
 302         udata->radar_file = decompressed;
 303         g_debug("AWeatherRadar: cached_cb - File updated, decompressing..");
 304         char *argv[] = {"wsr88ddec", path, decompressed, NULL};
 305         GPid pid;
 306         GError *error = NULL;
 307         g_spawn_async(
 308                 NULL,    // const gchar *working_directory,
 309                 argv,    // gchar **argv,
 310                 NULL,    // gchar **envp,
 311                 G_SPAWN_SEARCH_PATH|
 312                 G_SPAWN_DO_NOT_REAP_CHILD,
 313                          // GSpawnFlags flags,
 314                 NULL,    // GSpawnChildSetupFunc child_setup,
 315                 NULL,    // gpointer user_data,
 316                 &pid,    // GPid *child_pid,
 317                 &error); // GError **error
 318         if (error) {
 319                 g_warning("failed to decompress WSR88D data: %s",
 320                                 error->message);
 321                 g_error_free(error);
 322         }
 323         g_child_watch_add(pid, decompressed_cb, udata);
 324 }
 325
 326 /*************
 327  * Callbacks *
 328  *************/
 329 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self)
 330 {
 331         AWeatherRadar *self = AWEATHER_RADAR(_self);
 332         load_colormap(self, g_object_get_data(G_OBJECT(button), "type" ));
 333         load_sweep   (self, g_object_get_data(G_OBJECT(button), "sweep"));
 334 }
 335
 336 static void on_time_changed(AWeatherView *view, char *time, gpointer _self)
 337 {
 338         AWeatherRadar *self = AWEATHER_RADAR(_self);
 339         g_debug("AWeatherRadar: on_time_changed - setting time");
 340         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 341         char *site = aweather_view_get_site(view);
 342         char *base = "http://mesonet.agron.iastate.edu/data/";
 343         char *path = g_strdup_printf("nexrd2/raw/K%s/K%s_%s", site, site, time);
 344
 345         /* Clear out children */
 346         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 347         if (child)
 348                 gtk_widget_destroy(child);
 349         gtk_container_add(GTK_CONTAINER(self->config_body),
 350                 gtk_label_new("Loading radar..."));
 351         gtk_widget_show_all(self->config_body);
 352         if (self->cur_radar)
 353                 RSL_free_radar(self->cur_radar);
 354         self->cur_radar = NULL;
 355         self->cur_sweep = NULL;
 356         aweather_gui_gl_redraw(self->gui);
 357
 358         /* Start loading the new radar */
 359         cache_file(base, path, AWEATHER_AUTOMATIC, cached_cb, self);
 360         g_free(path);
 361 }
 362
 363 static void on_site_changed(AWeatherView *view, char *site, gpointer _self)
 364 {
 365         AWeatherRadar *self = AWEATHER_RADAR(_self);
 366         g_debug("AWeatherRadar: on_site_changed - Loading wsr88d list for %s", site);
 367         char *time = NULL;
 368         update_times(self, site, &time);
 369         aweather_view_set_time(view, time);
 370
 371         g_free(time);
 372 }
 373
 374 static void on_refresh(AWeatherView *view, gpointer user_data, gpointer _self)
 375 {
 376         AWeatherRadar *self = AWEATHER_RADAR(_self);
 377         char *site = aweather_view_get_site(view);
 378         char *time = NULL;
 379         update_times(self, site, &time);
 380         aweather_view_set_time(view, time);
 381         g_free(time);
 382 }
 383
 384 /***********
 385  * Methods *
 386  ***********/
 387 AWeatherRadar *aweather_radar_new(AWeatherGui *gui)
 388 {
 389         g_debug("AWeatherRadar: new");
 390         AWeatherRadar *self = g_object_new(AWEATHER_TYPE_RADAR, NULL);
 391         self->gui = gui;
 392
 393         GtkWidget    *config  = aweather_gui_get_widget(gui, "tabs");
 394         AWeatherView *view    = aweather_gui_get_view(gui);
 395
 396         /* Add configuration tab */
 397         self->config_body = gtk_alignment_new(0, 0, 1, 1);
 398         gtk_container_set_border_width(GTK_CONTAINER(self->config_body), 5);
 399         gtk_container_add(GTK_CONTAINER(self->config_body), gtk_label_new("No radar loaded"));
 400         gtk_notebook_prepend_page(GTK_NOTEBOOK(config), self->config_body, gtk_label_new("Radar"));
 401
 402         /* Set up OpenGL Stuff */
 403         g_signal_connect(view,    "site-changed", G_CALLBACK(on_site_changed), self);
 404         g_signal_connect(view,    "time-changed", G_CALLBACK(on_time_changed), self);
 405         g_signal_connect(view,    "refresh",      G_CALLBACK(on_refresh),      self);
 406
 407         return self;
 408 }
 409
 410 static void _aweather_radar_expose(AWeatherPlugin *_self)
 411 {
 412         AWeatherRadar *self = AWEATHER_RADAR(_self);
 413         g_debug("AWeatherRadar: expose");
 414         if (self->cur_sweep == NULL)
 415                 return;
 416         Sweep *sweep = self->cur_sweep;
 417
 418         /* Draw the rays */
 419
 420         glMatrixMode(GL_MODELVIEW);
 421         glPushMatrix();
 422         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 423         glEnable(GL_TEXTURE_2D);
 424         glDisable(GL_ALPHA_TEST);
 425         glColor4f(1,1,1,1);
 426         glBegin(GL_QUAD_STRIP);
 427         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 428                 Ray  *ray = NULL;
 429                 double angle = 0;
 430                 if (ri < sweep->h.nrays) {
 431                         ray = sweep->ray[ri];
 432                         angle = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 433                 } else {
 434                         /* Do the right side of the last sweep */
 435                         ray = sweep->ray[ri-1];
 436                         angle = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 437                 }
 438
 439                 double lx = sin(angle);
 440                 double ly = cos(angle);
 441
 442                 double near_dist = ray->h.range_bin1;
 443                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 444
 445                 /* (find middle of bin) / scale for opengl */
 446                 // near left
 447                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays-0.01);
 448                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 449
 450                 // far  left
 451                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays-0.01);
 452                 glVertex3f(lx*far_dist,  ly*far_dist,  2.0);
 453         }
 454         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 455         glEnd();
 456         glPopMatrix();
 457
 458         /* Texture debug */
 459         //glBegin(GL_QUADS);
 460         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 461         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 462         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 463         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 464         //glEnd();
 465
 466         /* Print the color table */
 467         glDisable(GL_TEXTURE_2D);
 468         glDisable(GL_DEPTH_TEST);
 469         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 470         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 471         glBegin(GL_QUADS);
 472         int i;
 473         for (i = 0; i < 256; i++) {
 474                 glColor4ub(self->cur_colormap->data[i][0],
 475                            self->cur_colormap->data[i][1],
 476                            self->cur_colormap->data[i][2],
 477                            self->cur_colormap->data[i][3]);
 478                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
 479                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
 480                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
 481                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
 482         }
 483         glEnd();
 484         glEnable(GL_DEPTH_TEST);
 485         glEnable(GL_ALPHA_TEST);
 486         glMatrixMode(GL_PROJECTION); glPopMatrix();
 487         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 488 }