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 /* Plugin init */
  33 static void aweather_radar_plugin_init(AWeatherPluginInterface *iface);
  34 static void _aweather_radar_expose(AWeatherPlugin *_radar);
  35 G_DEFINE_TYPE_WITH_CODE(AWeatherRadar, aweather_radar, G_TYPE_OBJECT,
  36                 G_IMPLEMENT_INTERFACE(AWEATHER_TYPE_PLUGIN,
  37                         aweather_radar_plugin_init));
  38 static void aweather_radar_plugin_init(AWeatherPluginInterface *iface)
  39 {
  40         g_debug("AWeatherRadar: plugin_init");
  41         /* Add methods to the interface */
  42         iface->expose = _aweather_radar_expose;
  43 }
  44 /* Class/Object init */
  45 static void aweather_radar_init(AWeatherRadar *radar)
  46 {
  47         g_debug("AWeatherRadar: class_init");
  48         /* Set defaults */
  49         radar->gui = NULL;
  50 }
  51 static void aweather_radar_dispose(GObject *gobject)
  52 {
  53         g_debug("AWeatherRadar: dispose");
  54         AWeatherRadar *self = AWEATHER_RADAR(gobject);
  55         /* Drop references */
  56         G_OBJECT_CLASS(aweather_radar_parent_class)->dispose(gobject);
  57 }
  58 static void aweather_radar_finalize(GObject *gobject)
  59 {
  60         g_debug("AWeatherRadar: finalize");
  61         AWeatherRadar *self = AWEATHER_RADAR(gobject);
  62         /* Free data */
  63         G_OBJECT_CLASS(aweather_radar_parent_class)->finalize(gobject);
  64
  65 }
  66 static void aweather_radar_class_init(AWeatherRadarClass *klass)
  67 {
  68         g_debug("AWeatherRadar: class_init");
  69         GObjectClass *gobject_class = (GObjectClass*)klass;
  70         gobject_class->dispose  = aweather_radar_dispose;
  71         gobject_class->finalize = aweather_radar_finalize;
  72 }
  73
  74 /**************************
  75  * Data loading functions *
  76  **************************/
  77 /* Convert a sweep to an 2d array of data points */
  78 static void bscan_sweep(AWeatherRadar *self, Sweep *sweep, colormap_t *colormap,
  79                 guint8 **data, int *width, int *height)
  80 {
  81         /* Calculate max number of bins */
  82         int i, max_bins = 0;
  83         for (i = 0; i < sweep->h.nrays; i++)
  84                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  85
  86         /* Allocate buffer using max number of bins for each ray */
  87         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  88
  89         /* Fill the data */
  90         int ri, bi;
  91         for (ri = 0; ri < sweep->h.nrays; ri++) {
  92                 Ray *ray  = sweep->ray[ri];
  93                 for (bi = 0; bi < ray->h.nbins; bi++) {
  94                         /* copy RGBA into buffer */
  95                         //guint val   = dz_f(ray->range[bi]);
  96                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
  97                         guint  buf_i = (ri*max_bins+bi)*4;
  98                         buf[buf_i+0] = colormap->data[val][0];
  99                         buf[buf_i+1] = colormap->data[val][1];
 100                         buf[buf_i+2] = colormap->data[val][2];
 101                         buf[buf_i+3] = colormap->data[val][3];
 102                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
 103                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
 104                                 buf[buf_i+3] = 0x00; // transparent
 105                         }
 106                 }
 107         }
 108
 109         /* set output */
 110         *width  = max_bins;
 111         *height = sweep->h.nrays;
 112         *data   = buf;
 113 }
 114
 115 /* Load a sweep as the active texture */
 116 static void load_sweep(AWeatherRadar *self, Sweep *sweep)
 117 {
 118         aweather_gui_gl_begin(self->gui);
 119         self->cur_sweep = sweep;
 120         int height, width;
 121         guint8 *data;
 122         bscan_sweep(self, sweep, self->cur_colormap, &data, &width, &height);
 123         glDeleteTextures(1, &self->cur_sweep_tex);
 124         glGenTextures(1, &self->cur_sweep_tex);
 125         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 126         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 127         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 128         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 129         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 130         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
 131                         GL_RGBA, GL_UNSIGNED_BYTE, data);
 132         g_free(data);
 133         aweather_gui_gl_redraw(self->gui);
 134         aweather_gui_gl_end(self->gui);
 135 }
 136
 137 static void load_colormap(AWeatherRadar *self, gchar *table)
 138 {
 139         /* Set colormap so we can draw it on expose */
 140         for (int i = 0; colormaps[i].name; i++)
 141                 if (g_str_equal(colormaps[i].name, table))
 142                         self->cur_colormap = &colormaps[i];
 143 }
 144
 145 /* Add selectors to the config area for the sweeps */
 146 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self);
 147 static void load_radar_gui(AWeatherRadar *self, Radar *radar)
 148 {
 149         /* Clear existing items */
 150         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 151         if (child)
 152                 gtk_widget_destroy(child);
 153
 154         gdouble elev;
 155         guint rows = 1, cols = 1, cur_cols;
 156         gchar row_label_str[64], col_label_str[64], button_str[64];
 157         GtkWidget *row_label, *col_label, *button = NULL, *elev_box;
 158         GtkWidget *table = gtk_table_new(rows, cols, FALSE);
 159
 160         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 161                 Volume *vol = radar->v[vi];
 162                 if (vol == NULL) continue;
 163                 rows++; cols = 1; elev = 0;
 164
 165                 /* Row label */
 166                 g_snprintf(row_label_str, 64, "<b>%s:</b>", vol->h.type_str);
 167                 row_label = gtk_label_new(row_label_str);
 168                 gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 169                 gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 170                 gtk_table_attach(GTK_TABLE(table), row_label,
 171                                 0,1, rows-1,rows, GTK_FILL,GTK_FILL, 5,0);
 172
 173                 for (guint si = 0; si < vol->h.nsweeps; si++) {
 174                         Sweep *sweep = vol->sweep[si];
 175                         if (sweep == NULL || sweep->h.elev == 0) continue;
 176                         if (sweep->h.elev != elev) {
 177                                 cols++;
 178                                 elev = sweep->h.elev;
 179
 180                                 /* Column label */
 181                                 g_object_get(table, "n-columns", &cur_cols, NULL);
 182                                 if (cols >  cur_cols) {
 183                                         g_snprintf(col_label_str, 64, "<b>%.2f°</b>", elev);
 184                                         col_label = gtk_label_new(col_label_str);
 185                                         gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 186                                         gtk_widget_set_size_request(col_label, 40, -1);
 187                                         gtk_table_attach(GTK_TABLE(table), col_label,
 188                                                         cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 189                                 }
 190
 191                                 elev_box = gtk_hbox_new(TRUE, 0);
 192                                 gtk_table_attach(GTK_TABLE(table), elev_box,
 193                                                 cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 194                         }
 195
 196
 197                         /* Button */
 198                         g_snprintf(button_str, 64, "%3.2f", elev);
 199                         button = gtk_radio_button_new_with_label_from_widget(
 200                                         GTK_RADIO_BUTTON(button), button_str);
 201                         gtk_widget_set_size_request(button, -1, 26);
 202                         //button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 203                         //gtk_widget_set_size_request(button, -1, 22);
 204                         g_object_set(button, "draw-indicator", FALSE, NULL);
 205                         gtk_box_pack_end(GTK_BOX(elev_box), button, TRUE, TRUE, 0);
 206
 207                         g_object_set_data(G_OBJECT(button), "type",  vol->h.type_str);
 208                         g_object_set_data(G_OBJECT(button), "sweep", sweep);
 209                         g_signal_connect(button, "clicked", G_CALLBACK(on_sweep_clicked), self);
 210                 }
 211         }
 212         gtk_container_add(GTK_CONTAINER(self->config_body), table);
 213         gtk_widget_show_all(table);
 214 }
 215
 216 /* Load a radar from a decompressed file */
 217 static void load_radar(AWeatherRadar *self, gchar *radar_file)
 218 {
 219         char *dir  = g_path_get_dirname(radar_file);
 220         char *site = g_path_get_basename(dir);
 221         g_free(dir);
 222         g_debug("AWeatherRadar: load_radar - Loading new radar");
 223         RSL_read_these_sweeps("all", NULL);
 224         Radar *radar = self->cur_radar = RSL_wsr88d_to_radar(radar_file, site);
 225         if (radar == NULL) {
 226                 g_warning("fail to load radar: path=%s, site=%s", radar_file, site);
 227                 g_free(site);
 228                 return;
 229         }
 230         g_free(site);
 231
 232         /* Load the first sweep by default */
 233         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 234                 g_warning("No sweeps found\n");
 235         } else {
 236                 /* load first available sweep */
 237                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 238                         if (radar->v[vi]== NULL) continue;
 239                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 240                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 241                                 load_colormap(self, radar->v[vi]->h.type_str);
 242                                 load_sweep(self, radar->v[vi]->sweep[si]);
 243                                 break;
 244                         }
 245                         break;
 246                 }
 247         }
 248
 249         load_radar_gui(self, radar);
 250 }
 251
 252 static void update_times(AWeatherRadar *self, char *site, char **last_time)
 253 {
 254         char *list_uri = g_strdup_printf(
 255                         "http://mesonet.agron.iastate.edu/data/nexrd2/raw/K%s/dir.list",
 256                         site);
 257         GFile *list    = g_file_new_for_uri(list_uri);
 258         g_free(list_uri);
 259
 260         gchar *data;
 261         gsize length;
 262         GError *error = NULL;
 263         g_file_load_contents(list, NULL, &data, &length, NULL, &error);
 264         g_object_unref(list);
 265         if (error) {
 266                 g_warning("Error loading list for %s: %s", site, error->message);
 267                 g_error_free(error);
 268                 return;
 269         }
 270         gchar **lines = g_strsplit(data, "\n", -1);
 271         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(self->gui, "time"));
 272         GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
 273         gtk_list_store_clear(lstore);
 274         GtkTreeIter iter;
 275         for (int i = 0; lines[i] && lines[i][0]; i++) {
 276                 // format: `841907 KABR_20090510_0159'
 277                 //g_message("\tadding %p [%s]", lines[i], lines[i]);
 278                 char **parts = g_strsplit(lines[i], " ", 2);
 279                 char *time = parts[1]+5;
 280                 gtk_list_store_insert(lstore, &iter, 0);
 281                 gtk_list_store_set(lstore, &iter, 0, time, -1);
 282                 g_strfreev(parts);
 283         }
 284
 285         if (last_time)
 286                 gtk_tree_model_get(GTK_TREE_MODEL(lstore), &iter, 0, last_time, -1);
 287
 288         g_free(data);
 289         g_strfreev(lines);
 290 }
 291
 292 /*****************
 293  * ASync helpers *
 294  *****************/
 295 typedef struct {
 296         AWeatherRadar *self;
 297         gchar *radar_file;
 298 } decompressed_t;
 299
 300 static void decompressed_cb(GPid pid, gint status, gpointer _udata)
 301 {
 302         decompressed_t *udata = _udata;
 303         if (status != 0) {
 304                 g_warning("wsr88ddec exited with status %d", status);
 305                 return;
 306         }
 307         load_radar(udata->self, udata->radar_file);
 308         g_spawn_close_pid(pid);
 309         g_free(udata->radar_file);
 310         g_free(udata);
 311 }
 312
 313 static void cached_cb(char *path, gboolean updated, gpointer _self)
 314 {
 315         AWeatherRadar *self = AWEATHER_RADAR(_self);
 316         char *decompressed = g_strconcat(path, ".raw", NULL);
 317         if (!updated) {
 318                 load_radar(self, decompressed);
 319                 return;
 320         }
 321
 322         decompressed_t *udata = g_malloc(sizeof(decompressed_t));
 323         udata->self       = self;
 324         udata->radar_file = decompressed;
 325         g_debug("AWeatherRadar: cached_cb - File updated, decompressing..");
 326         char *argv[] = {"wsr88ddec", path, decompressed, NULL};
 327         GPid pid;
 328         GError *error = NULL;
 329         g_spawn_async(
 330                 NULL,    // const gchar *working_directory,
 331                 argv,    // gchar **argv,
 332                 NULL,    // gchar **envp,
 333                 G_SPAWN_SEARCH_PATH|
 334                 G_SPAWN_DO_NOT_REAP_CHILD,
 335                          // GSpawnFlags flags,
 336                 NULL,    // GSpawnChildSetupFunc child_setup,
 337                 NULL,    // gpointer user_data,
 338                 &pid,    // GPid *child_pid,
 339                 &error); // GError **error
 340         if (error) {
 341                 g_warning("failed to decompress WSR88D data: %s",
 342                                 error->message);
 343                 g_error_free(error);
 344         }
 345         g_child_watch_add(pid, decompressed_cb, udata);
 346 }
 347
 348 /*************
 349  * Callbacks *
 350  *************/
 351 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self)
 352 {
 353         AWeatherRadar *self = AWEATHER_RADAR(_self);
 354         load_colormap(self, g_object_get_data(G_OBJECT(button), "type" ));
 355         load_sweep   (self, g_object_get_data(G_OBJECT(button), "sweep"));
 356 }
 357
 358 static void on_time_changed(AWeatherView *view, char *time, gpointer _self)
 359 {
 360         AWeatherRadar *self = AWEATHER_RADAR(_self);
 361         g_debug("AWeatherRadar: on_time_changed - setting time");
 362         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 363         char *site = aweather_view_get_site(view);
 364         char *base = "http://mesonet.agron.iastate.edu/data/";
 365         char *path = g_strdup_printf("nexrd2/raw/K%s/K%s_%s", site, site, time);
 366
 367         /* Clear out children */
 368         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 369         if (child)
 370                 gtk_widget_destroy(child);
 371         gtk_container_add(GTK_CONTAINER(self->config_body),
 372                 gtk_label_new("Loading radar..."));
 373         gtk_widget_show_all(self->config_body);
 374         if (self->cur_radar)
 375                 RSL_free_radar(self->cur_radar);
 376         self->cur_radar = NULL;
 377         self->cur_sweep = NULL;
 378         aweather_gui_gl_redraw(self->gui);
 379
 380         /* Start loading the new radar */
 381         cache_file(base, path, AWEATHER_AUTOMATIC, cached_cb, self);
 382         g_free(path);
 383 }
 384
 385 static void on_site_changed(AWeatherView *view, char *site, gpointer _self)
 386 {
 387         AWeatherRadar *self = AWEATHER_RADAR(_self);
 388         g_debug("AWeatherRadar: on_site_changed - Loading wsr88d list for %s", site);
 389         char *time = NULL;
 390         update_times(self, site, &time);
 391         aweather_view_set_time(view, time);
 392
 393         g_free(time);
 394 }
 395
 396 static void on_refresh(AWeatherView *view, gpointer _self)
 397 {
 398         AWeatherRadar *self = AWEATHER_RADAR(_self);
 399         char *site = aweather_view_get_site(view);
 400         char *time = NULL;
 401         update_times(self, site, &time);
 402         aweather_view_set_time(view, time);
 403         g_free(time);
 404 }
 405
 406 /***********
 407  * Methods *
 408  ***********/
 409 AWeatherRadar *aweather_radar_new(AWeatherGui *gui)
 410 {
 411         g_debug("AWeatherRadar: new");
 412         AWeatherRadar *self = g_object_new(AWEATHER_TYPE_RADAR, NULL);
 413         self->gui = gui;
 414
 415         GtkWidget    *config  = aweather_gui_get_widget(gui, "tabs");
 416         AWeatherView *view    = aweather_gui_get_view(gui);
 417
 418         /* Add configuration tab */
 419         self->config_body = gtk_alignment_new(0, 0, 1, 1);
 420         gtk_container_set_border_width(GTK_CONTAINER(self->config_body), 5);
 421         gtk_container_add(GTK_CONTAINER(self->config_body), gtk_label_new("No radar loaded"));
 422         gtk_notebook_prepend_page(GTK_NOTEBOOK(config), self->config_body, gtk_label_new("Radar"));
 423
 424         /* Set up OpenGL Stuff */
 425         g_signal_connect(view,    "site-changed", G_CALLBACK(on_site_changed), self);
 426         g_signal_connect(view,    "time-changed", G_CALLBACK(on_time_changed), self);
 427         g_signal_connect(view,    "refresh",      G_CALLBACK(on_refresh),      self);
 428
 429         return self;
 430 }
 431
 432 static void _aweather_radar_expose(AWeatherPlugin *_self)
 433 {
 434         AWeatherRadar *self = AWEATHER_RADAR(_self);
 435         g_debug("AWeatherRadar: expose");
 436         if (self->cur_sweep == NULL)
 437                 return;
 438         Sweep *sweep = self->cur_sweep;
 439
 440         /* Draw the rays */
 441
 442         glMatrixMode(GL_MODELVIEW);
 443         glPushMatrix();
 444         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 445         glEnable(GL_TEXTURE_2D);
 446         glDisable(GL_ALPHA_TEST);
 447         glColor4f(1,1,1,1);
 448         glBegin(GL_QUAD_STRIP);
 449         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 450                 Ray  *ray = NULL;
 451                 double angle = 0;
 452                 if (ri < sweep->h.nrays) {
 453                         ray = sweep->ray[ri];
 454                         angle = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 455                 } else {
 456                         /* Do the right side of the last sweep */
 457                         ray = sweep->ray[ri-1];
 458                         angle = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 459                 }
 460
 461                 double lx = sin(angle);
 462                 double ly = cos(angle);
 463
 464                 double near_dist = ray->h.range_bin1;
 465                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 466
 467                 /* (find middle of bin) / scale for opengl */
 468                 // near left
 469                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays-0.01);
 470                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 471
 472                 // far  left
 473                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays-0.01);
 474                 glVertex3f(lx*far_dist,  ly*far_dist,  2.0);
 475         }
 476         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 477         glEnd();
 478         glPopMatrix();
 479
 480         /* Texture debug */
 481         //glBegin(GL_QUADS);
 482         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 483         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 484         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 485         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 486         //glEnd();
 487
 488         /* Print the color table */
 489         glDisable(GL_TEXTURE_2D);
 490         glDisable(GL_DEPTH_TEST);
 491         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 492         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 493         glBegin(GL_QUADS);
 494         int i;
 495         for (i = 0; i < 256; i++) {
 496                 glColor4ub(self->cur_colormap->data[i][0],
 497                            self->cur_colormap->data[i][1],
 498                            self->cur_colormap->data[i][2],
 499                            self->cur_colormap->data[i][3]);
 500                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
 501                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
 502                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
 503                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
 504         }
 505         glEnd();
 506         glEnable(GL_DEPTH_TEST);
 507         glEnable(GL_ALPHA_TEST);
 508         glMatrixMode(GL_PROJECTION); glPopMatrix();
 509         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 510 }