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 /* TODO: User parameters or user data or something */
  53 static AWeatherRadar *self = NULL;
  54
  55 /**************************
  56  * Data loading functions *
  57  **************************/
  58 /* Convert a sweep to an 2d array of data points */
  59 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
  60 {
  61         /* Calculate max number of bins */
  62         int i, max_bins = 0;
  63         for (i = 0; i < sweep->h.nrays; i++)
  64                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  65
  66         /* Allocate buffer using max number of bins for each ray */
  67         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  68
  69         /* Fill the data */
  70         int ri, bi;
  71         for (ri = 0; ri < sweep->h.nrays; ri++) {
  72                 Ray *ray  = sweep->ray[ri];
  73                 for (bi = 0; bi < ray->h.nbins; bi++) {
  74                         /* copy RGBA into buffer */
  75                         //guint val   = dz_f(ray->range[bi]);
  76                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
  77                         guint  buf_i = (ri*max_bins+bi)*4;
  78                         buf[buf_i+0] = self->cur_colormap->data[val][0];
  79                         buf[buf_i+1] = self->cur_colormap->data[val][1];
  80                         buf[buf_i+2] = self->cur_colormap->data[val][2];
  81                         buf[buf_i+3] = self->cur_colormap->data[val][3];
  82                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
  83                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
  84                                 buf[buf_i+3] = 0x00; // transparent
  85                         }
  86                 }
  87         }
  88
  89         /* set output */
  90         *width  = max_bins;
  91         *height = sweep->h.nrays;
  92         *data   = buf;
  93 }
  94
  95 static void load_color_table(char *table)
  96 {
  97         for (int i = 0; colormaps[i].name; i++)
  98                 if (g_str_equal(colormaps[i].name, table))
  99                         self->cur_colormap = &colormaps[i];
 100 }
 101
 102 /* Load a sweep as the active texture */
 103 static void load_sweep(Sweep *sweep)
 104 {
 105         aweather_gui_gl_begin(self->gui);
 106         self->cur_sweep = sweep;
 107         int height, width;
 108         guint8 *data;
 109         bscan_sweep(sweep, &data, &width, &height);
 110         glDeleteTextures(1, &self->cur_sweep_tex);
 111         glGenTextures(1, &self->cur_sweep_tex);
 112         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 113         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 114         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 115         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 116         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 117         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
 118                         GL_RGBA, GL_UNSIGNED_BYTE, data);
 119         g_free(data);
 120         aweather_gui_gl_redraw(self->gui);
 121         aweather_gui_gl_end(self->gui);
 122 }
 123
 124 /* Add selectors to the config area for the sweeps */
 125 static void load_radar_gui(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                                 g_message("adding elev");
 156                                 cols++;
 157                                 elev = sweep->h.elev;
 158
 159                                 /* Column label */
 160                                 g_object_get(table, "n-columns", &cur_cols, NULL);
 161                                 if (cols >  cur_cols) {
 162                                         g_snprintf(col_label_str, 64, "<b>%.2f°</b>", elev);
 163                                         col_label = gtk_label_new(col_label_str);
 164                                         gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 165                                         gtk_widget_set_size_request(col_label, 40, -1);
 166                                         gtk_table_attach(GTK_TABLE(table), col_label,
 167                                                         cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 168                                 }
 169
 170                                 elev_box = gtk_hbox_new(TRUE, 0);
 171                                 gtk_table_attach(GTK_TABLE(table), elev_box,
 172                                                 cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 173                         }
 174
 175
 176                         /* Button */
 177                         g_snprintf(button_str, 64, "%3.2f", elev);
 178                         button = gtk_radio_button_new_with_label_from_widget(
 179                                         GTK_RADIO_BUTTON(button), button_str);
 180                         gtk_widget_set_size_request(button, -1, 26);
 181                         //button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 182                         //gtk_widget_set_size_request(button, -1, 22);
 183                         g_object_set(button, "draw-indicator", FALSE, NULL);
 184                         gtk_box_pack_end(GTK_BOX(elev_box), button, TRUE, TRUE, 0);
 185                         g_signal_connect_swapped(button, "clicked",
 186                                         G_CALLBACK(load_color_table), vol->h.type_str);
 187                         g_signal_connect_swapped(button, "clicked",
 188                                         G_CALLBACK(load_sweep), sweep);
 189                 }
 190         }
 191         gtk_container_add(GTK_CONTAINER(self->config_body), table);
 192         gtk_widget_show_all(table);
 193 }
 194
 195 /* Load a radar from a file */
 196 static void load_radar_rsl(GPid pid, gint status, gpointer _path)
 197 {
 198         gchar *path = _path;
 199         if (status != 0) {
 200                 g_warning("wsr88ddec exited with status %d", status);
 201                 return;
 202         }
 203         char *dir  = g_path_get_dirname(path);
 204         char *site = g_path_get_basename(dir);
 205         g_free(dir);
 206         RSL_read_these_sweeps("all", NULL);
 207         if (self->cur_radar) {
 208                 g_message("Freeing radar");
 209                 RSL_free_radar(self->cur_radar);
 210         }
 211         g_message("Allocating radar");
 212         Radar *radar = self->cur_radar = RSL_wsr88d_to_radar(path, site);
 213         if (radar == NULL) {
 214                 g_warning("fail to load radar: path=%s, site=%s", path, site);
 215                 g_free(path);
 216                 g_free(site);
 217                 return;
 218         }
 219         g_free(path);
 220         g_free(site);
 221
 222         /* Load the first sweep by default */
 223         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 224                 g_warning("No sweeps found\n");
 225         } else {
 226                 /* load first available sweep */
 227                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 228                         if (radar->v[vi]== NULL) continue;
 229                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 230                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 231                                 load_color_table(radar->v[vi]->h.type_str);
 232                                 load_sweep(radar->v[vi]->sweep[si]);
 233                                 break;
 234                         }
 235                         break;
 236                 }
 237         }
 238
 239         load_radar_gui(radar);
 240 }
 241
 242 /* decompress a radar file, then chain to the actuall loading function */
 243 static void load_radar(char *path, gboolean updated, gpointer user_data)
 244 {
 245         char *raw  = g_strconcat(path, ".raw", NULL);
 246         if (!updated) {
 247                 load_radar_rsl(0, 0, raw);
 248         } else {
 249                 g_message("File updated, decompressing..");
 250                 char *argv[] = {"wsr88ddec", path, raw, NULL};
 251                 GPid pid;
 252                 GError *error = NULL;
 253                 g_spawn_async(
 254                         NULL,    // const gchar *working_directory,
 255                         argv,    // gchar **argv,
 256                         NULL,    // gchar **envp,
 257                         G_SPAWN_SEARCH_PATH|
 258                         G_SPAWN_DO_NOT_REAP_CHILD,
 259                                  // GSpawnFlags flags,
 260                         NULL,    // GSpawnChildSetupFunc child_setup,
 261                         NULL,    // gpointer user_data,
 262                         &pid,    // GPid *child_pid,
 263                         &error); // GError **error
 264                 if (error) {
 265                         g_warning("failed to decompress WSR88D data: %s",
 266                                         error->message);
 267                         g_error_free(error);
 268                 }
 269                 g_child_watch_add(pid, load_radar_rsl, raw);
 270         }
 271 }
 272
 273 static void update_times(char *site, char **last_time)
 274 {
 275         char *list_uri = g_strdup_printf(
 276                         "http://mesonet.agron.iastate.edu/data/nexrd2/raw/K%s/dir.list",
 277                         site);
 278         GFile *list    = g_file_new_for_uri(list_uri);
 279         g_free(list_uri);
 280
 281         gchar *data;
 282         gsize length;
 283         GError *error = NULL;
 284         g_file_load_contents(list, NULL, &data, &length, NULL, &error);
 285         g_object_unref(list);
 286         if (error) {
 287                 g_warning("Error loading list for %s: %s", site, error->message);
 288                 g_error_free(error);
 289                 return;
 290         }
 291         gchar **lines = g_strsplit(data, "\n", -1);
 292         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(self->gui, "time"));
 293         GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
 294         gtk_list_store_clear(lstore);
 295         GtkTreeIter iter;
 296         for (int i = 0; lines[i] && lines[i][0]; i++) {
 297                 // format: `841907 KABR_20090510_0159'
 298                 //g_message("\tadding %p [%s]", lines[i], lines[i]);
 299                 char **parts = g_strsplit(lines[i], " ", 2);
 300                 char *time = parts[1]+5;
 301                 gtk_list_store_insert(lstore, &iter, 0);
 302                 gtk_list_store_set(lstore, &iter, 0, time, -1);
 303                 g_strfreev(parts);
 304         }
 305
 306         if (last_time)
 307                 gtk_tree_model_get(GTK_TREE_MODEL(lstore), &iter, 0, last_time, -1);
 308
 309         g_free(data);
 310         g_strfreev(lines);
 311 }
 312
 313 /*************
 314  * Callbacks *
 315  *************/
 316 static void on_time_changed(AWeatherView *view, char *time, gpointer user_data)
 317 {
 318         g_message("radar:setting time");
 319         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 320         char *site = aweather_view_get_site(view);
 321         char *base = "http://mesonet.agron.iastate.edu/data/";
 322         char *path = g_strdup_printf("nexrd2/raw/K%s/K%s_%s", site, site, time);
 323
 324         self->cur_radar = NULL;
 325         self->cur_sweep = NULL; // Clear radar
 326         aweather_gui_gl_redraw(self->gui);
 327
 328         cache_file(base, path, AWEATHER_AUTOMATIC, load_radar, NULL);
 329         g_free(path);
 330 }
 331
 332 static void on_site_changed(AWeatherView *view, char *site, gpointer user_data)
 333 {
 334         g_message("Loading wsr88d list for %s", site);
 335         char *time = NULL;
 336         update_times(site, &time);
 337         aweather_view_set_time(view, time);
 338
 339         g_free(time);
 340 }
 341
 342 static void on_refresh(AWeatherView *view, gpointer user_data)
 343 {
 344         char *site = aweather_view_get_site(view);
 345         char *time = NULL;
 346         update_times(site, &time);
 347         aweather_view_set_time(view, time);
 348         g_free(time);
 349 }
 350
 351
 352
 353 /***********
 354  * Methods *
 355  ***********/
 356 AWeatherRadar *aweather_radar_new(AWeatherGui *gui)
 357 {
 358         //g_message("aweather_view_new");
 359         AWeatherRadar *radar = g_object_new(AWEATHER_TYPE_RADAR, NULL);
 360         radar->gui = gui;
 361
 362         self = radar;
 363
 364         GtkWidget    *config  = aweather_gui_get_widget(gui, "tabs");
 365         AWeatherView *view    = aweather_gui_get_view(gui);
 366
 367         /* Add configuration tab */
 368         self->config_body = gtk_alignment_new(0, 0, 1, 1);
 369         gtk_container_set_border_width(GTK_CONTAINER(self->config_body), 5);
 370         gtk_container_add(GTK_CONTAINER(self->config_body), gtk_label_new("No radar loaded"));
 371         gtk_notebook_prepend_page(GTK_NOTEBOOK(config), self->config_body, gtk_label_new("Radar"));
 372
 373         /* Set up OpenGL Stuff */
 374         g_signal_connect(view,    "site-changed", G_CALLBACK(on_site_changed), NULL);
 375         g_signal_connect(view,    "time-changed", G_CALLBACK(on_time_changed), NULL);
 376         g_signal_connect(view,    "refresh",      G_CALLBACK(on_refresh),      NULL);
 377
 378         return radar;
 379 }
 380
 381 static void aweather_radar_expose(AWeatherPlugin *_radar)
 382 {
 383         AWeatherRadar *radar = AWEATHER_RADAR(_radar);
 384         g_message("radar:expose");
 385         if (self->cur_sweep == NULL)
 386                 return;
 387         Sweep *sweep = self->cur_sweep;
 388
 389         /* Draw the rays */
 390
 391         glMatrixMode(GL_MODELVIEW);
 392         glPushMatrix();
 393         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 394         glEnable(GL_TEXTURE_2D);
 395         glDisable(GL_ALPHA_TEST);
 396         glColor4f(1,1,1,1);
 397         glBegin(GL_QUAD_STRIP);
 398         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 399                 Ray  *ray = NULL;
 400                 double angle = 0;
 401                 if (ri < sweep->h.nrays) {
 402                         ray = sweep->ray[ri];
 403                         angle = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 404                 } else {
 405                         /* Do the right side of the last sweep */
 406                         ray = sweep->ray[ri-1];
 407                         angle = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 408                 }
 409
 410                 double lx = sin(angle);
 411                 double ly = cos(angle);
 412
 413                 double near_dist = ray->h.range_bin1;
 414                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 415
 416                 /* (find middle of bin) / scale for opengl */
 417                 // near left
 418                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays-0.01);
 419                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 420
 421                 // far  left
 422                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays-0.01);
 423                 glVertex3f(lx*far_dist,  ly*far_dist,  2.0);
 424         }
 425         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 426         glEnd();
 427         glPopMatrix();
 428
 429         /* Texture debug */
 430         //glBegin(GL_QUADS);
 431         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 432         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 433         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 434         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 435         //glEnd();
 436
 437         /* Print the color table */
 438         glDisable(GL_TEXTURE_2D);
 439         glDisable(GL_DEPTH_TEST);
 440         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 441         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 442         glBegin(GL_QUADS);
 443         int i;
 444         for (i = 0; i < 256; i++) {
 445                 glColor4ub(self->cur_colormap->data[i][0],
 446                            self->cur_colormap->data[i][1],
 447                            self->cur_colormap->data[i][2],
 448                            self->cur_colormap->data[i][3]);
 449                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
 450                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
 451                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
 452                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
 453         }
 454         glEnd();
 455         glEnable(GL_DEPTH_TEST);
 456         glEnable(GL_ALPHA_TEST);
 457         glMatrixMode(GL_PROJECTION); glPopMatrix();
 458         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 459 }