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
  24 #include "rsl.h"
  25
  26 #include "aweather-gui.h"
  27 #include "plugin-radar.h"
  28 #include "data.h"
  29
  30 GtkWidget *drawing;
  31 GtkWidget *config_body;
  32 static Sweep *cur_sweep = NULL;  // make this not global
  33 //static int nred, ngreen, nblue;
  34 //static char red[256], green[256], blue[256];
  35 static colormap_t *colormap;
  36 static guint sweep_tex = 0;
  37 static Radar *radar = NULL;
  38
  39 static AWeatherGui *gui = NULL;
  40
  41 /**************************
  42  * Data loading functions *
  43  **************************/
  44 /* Convert a sweep to an 2d array of data points */
  45 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
  46 {
  47         /* Calculate max number of bins */
  48         int i, max_bins = 0;
  49         for (i = 0; i < sweep->h.nrays; i++)
  50                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  51
  52         /* Allocate buffer using max number of bins for each ray */
  53         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  54
  55         /* Fill the data */
  56         int ri, bi;
  57         for (ri = 0; ri < sweep->h.nrays; ri++) {
  58                 Ray *ray  = sweep->ray[ri];
  59                 for (bi = 0; bi < ray->h.nbins; bi++) {
  60                         /* copy RGBA into buffer */
  61                         //guint val   = dz_f(ray->range[bi]);
  62                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
  63                         guint  buf_i = (ri*max_bins+bi)*4;
  64                         buf[buf_i+0] = colormap->data[val][0];
  65                         buf[buf_i+1] = colormap->data[val][1];
  66                         buf[buf_i+2] = colormap->data[val][2];
  67                         buf[buf_i+3] = colormap->data[val][3];
  68                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
  69                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
  70                                 buf[buf_i+3] = 0x00; // transparent
  71                         }
  72                 }
  73         }
  74
  75         /* set output */
  76         *width  = max_bins;
  77         *height = sweep->h.nrays;
  78         *data   = buf;
  79 }
  80
  81 static void load_color_table(char *table)
  82 {
  83         for (int i = 0; colormaps[i].name; i++)
  84                 if (g_str_equal(colormaps[i].name, table))
  85                         colormap = &colormaps[i];
  86 }
  87
  88 /* Load a sweep as the active texture */
  89 static void load_sweep(Sweep *sweep)
  90 {
  91         aweather_gui_gl_begin(gui);
  92         cur_sweep = sweep;
  93         int height, width;
  94         guint8 *data;
  95         bscan_sweep(sweep, &data, &width, &height);
  96         glDeleteTextures(1, &sweep_tex);
  97         glGenTextures(1, &sweep_tex);
  98         glBindTexture(GL_TEXTURE_2D, sweep_tex);
  99         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 100         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 101         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 102         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 103         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
 104                         GL_RGBA, GL_UNSIGNED_BYTE, data);
 105         g_free(data);
 106         gtk_widget_queue_draw(aweather_gui_get_widget(gui, "drawing"));
 107         aweather_gui_gl_end(gui);
 108 }
 109
 110 /* Add selectors to the config area for the sweeps */
 111 static void load_radar_gui(Radar *radar)
 112 {
 113         /* Clear existing items */
 114         GtkWidget *child = gtk_bin_get_child(GTK_BIN(config_body));
 115         if (child)
 116                 gtk_widget_destroy(child);
 117
 118         guint rows = 1, cols = 1, cur_cols;
 119         gchar row_label_str[64], col_label_str[64], button_str[64];
 120         GtkWidget *row_label, *col_label, *button = NULL;
 121         GtkWidget *table = gtk_table_new(rows, cols, FALSE);
 122
 123         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 124                 Volume *vol = radar->v[vi];
 125                 if (vol == NULL) continue;
 126                 rows++; cols = 1;
 127
 128                 /* Row label */
 129                 g_snprintf(row_label_str, 64, "<b>%s:</b>", vol->h.type_str);
 130                 row_label = gtk_label_new(row_label_str);
 131                 gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 132                 gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 133                 gtk_table_attach(GTK_TABLE(table), row_label,
 134                                 0,1, rows-1,rows, GTK_FILL,GTK_FILL, 5,0);
 135
 136                 for (guint si = 0; si < vol->h.nsweeps; si++) {
 137                         Sweep *sweep = vol->sweep[si];
 138                         if (sweep == NULL || sweep->h.elev == 0) continue;
 139                         cols++;
 140
 141                         /* Column label */
 142                         g_object_get(table, "n-columns", &cur_cols, NULL);
 143                         if (cols >  cur_cols) {
 144                                 g_snprintf(col_label_str, 64, "<b>%.2f°</b>", sweep->h.elev);
 145                                 col_label = gtk_label_new(col_label_str);
 146                                 gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 147                                 gtk_widget_set_size_request(col_label, 40, -1);
 148                                 gtk_table_attach(GTK_TABLE(table), col_label,
 149                                                 cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 150                         }
 151
 152                         /* Button */
 153                         button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 154                         gtk_widget_set_size_request(button, -1, 22);
 155                         g_object_set(button, "draw-indicator", FALSE, NULL);
 156                         g_signal_connect_swapped(button, "clicked",
 157                                         G_CALLBACK(load_color_table), vol->h.type_str);
 158                         g_signal_connect_swapped(button, "clicked",
 159                                         G_CALLBACK(load_sweep), sweep);
 160                         gtk_table_attach(GTK_TABLE(table), button,
 161                                         cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 162                 }
 163         }
 164         gtk_container_add(GTK_CONTAINER(config_body), table);
 165         gtk_widget_show_all(table);
 166 }
 167
 168 /* Load a radar from a file */
 169 static void load_radar_rsl(GPid pid, gint status, gpointer _path)
 170 {
 171         gchar *path = _path;
 172         if (status != 0) {
 173                 g_warning("wsr88ddec exited with status %d", status);
 174                 return;
 175         }
 176         char *dir  = g_path_get_dirname(path);
 177         char *site = g_path_get_basename(dir);
 178         g_free(dir);
 179         RSL_read_these_sweeps("all", NULL);
 180         if (radar) {
 181                 g_message("Freeing radar");
 182                 RSL_free_radar(radar);
 183         }
 184         g_message("Allocating radar");
 185         radar = RSL_wsr88d_to_radar(path, site);
 186         if (radar == NULL) {
 187                 g_warning("fail to load radar: path=%s, site=%s", path, site);
 188                 g_free(path);
 189                 g_free(site);
 190                 return;
 191         }
 192         g_free(path);
 193         g_free(site);
 194
 195         /* Load the first sweep by default */
 196         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 197                 g_warning("No sweeps found\n");
 198         } else {
 199                 /* load first available sweep */
 200                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 201                         if (radar->v[vi]== NULL) continue;
 202                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 203                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 204                                 load_color_table(radar->v[vi]->h.type_str);
 205                                 load_sweep(radar->v[vi]->sweep[si]);
 206                                 break;
 207                         }
 208                         break;
 209                 }
 210         }
 211
 212         load_radar_gui(radar);
 213 }
 214
 215 /* decompress a radar file, then chain to the actuall loading function */
 216 static void load_radar(char *path, gboolean updated, gpointer user_data)
 217 {
 218         char *raw  = g_strconcat(path, ".raw", NULL);
 219         if (!updated) {
 220                 load_radar_rsl(0, 0, raw);
 221         } else {
 222                 g_message("File updated, decompressing..");
 223                 char *argv[] = {"wsr88ddec", path, raw, NULL};
 224                 GPid pid;
 225                 GError *error = NULL;
 226                 g_spawn_async(
 227                         NULL,    // const gchar *working_directory,
 228                         argv,    // gchar **argv,
 229                         NULL,    // gchar **envp,
 230                         G_SPAWN_SEARCH_PATH|
 231                         G_SPAWN_DO_NOT_REAP_CHILD,
 232                                  // GSpawnFlags flags,
 233                         NULL,    // GSpawnChildSetupFunc child_setup,
 234                         NULL,    // gpointer user_data,
 235                         &pid,    // GPid *child_pid,
 236                         &error); // GError **error
 237                 if (error) {
 238                         g_warning("failed to decompress WSR88D data: %s",
 239                                         error->message);
 240                         g_error_free(error);
 241                 }
 242                 g_child_watch_add(pid, load_radar_rsl, raw);
 243         }
 244 }
 245
 246 static void update_times(char *site, char **last_time)
 247 {
 248         char *list_uri = g_strdup_printf(
 249                         "http://mesonet.agron.iastate.edu/data/nexrd2/raw/K%s/dir.list",
 250                         site);
 251         GFile *list    = g_file_new_for_uri(list_uri);
 252         g_free(list_uri);
 253
 254         gchar *data;
 255         gsize length;
 256         GError *error = NULL;
 257         g_file_load_contents(list, NULL, &data, &length, NULL, &error);
 258         g_object_unref(list);
 259         if (error) {
 260                 g_warning("Error loading list for %s: %s", site, error->message);
 261                 g_error_free(error);
 262                 return;
 263         }
 264         gchar **lines = g_strsplit(data, "\n", -1);
 265         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 266         GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
 267         gtk_list_store_clear(lstore);
 268         GtkTreeIter iter;
 269         for (int i = 0; lines[i] && lines[i][0]; i++) {
 270                 // format: `841907 KABR_20090510_0159'
 271                 //g_message("\tadding %p [%s]", lines[i], lines[i]);
 272                 char **parts = g_strsplit(lines[i], " ", 2);
 273                 char *time = parts[1]+5;
 274                 gtk_list_store_insert(lstore, &iter, 0);
 275                 gtk_list_store_set(lstore, &iter, 0, time, -1);
 276                 g_strfreev(parts);
 277         }
 278
 279         if (last_time)
 280                 gtk_tree_model_get(GTK_TREE_MODEL(lstore), &iter, 0, last_time, -1);
 281
 282         g_free(data);
 283         g_strfreev(lines);
 284 }
 285
 286 /*************
 287  * Callbacks *
 288  *************/
 289 static gboolean on_expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
 290 {
 291         g_message("radar:expose");
 292         if (cur_sweep == NULL)
 293                 return FALSE;
 294         Sweep *sweep = cur_sweep;
 295
 296         /* Draw the rays */
 297
 298         glMatrixMode(GL_MODELVIEW);
 299         glPushMatrix();
 300         glBindTexture(GL_TEXTURE_2D, sweep_tex);
 301         glEnable(GL_TEXTURE_2D);
 302         glDisable(GL_ALPHA_TEST);
 303         glColor4f(1,1,1,1);
 304         glBegin(GL_QUAD_STRIP);
 305         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 306                 Ray  *ray = NULL;
 307                 double angle = 0;
 308                 if (ri < sweep->h.nrays) {
 309                         ray = sweep->ray[ri];
 310                         angle = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 311                 } else {
 312                         /* Do the right side of the last sweep */
 313                         ray = sweep->ray[ri-1];
 314                         angle = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 315                 }
 316
 317                 double lx = sin(angle);
 318                 double ly = cos(angle);
 319
 320                 double near_dist = ray->h.range_bin1;
 321                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 322
 323                 /* (find middle of bin) / scale for opengl */
 324                 // near left
 325                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays);
 326                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 327
 328                 // far  left
 329                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays);
 330                 glVertex3f(lx*far_dist,  ly*far_dist,  2.0);
 331         }
 332         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 333         glEnd();
 334         glPopMatrix();
 335
 336         /* Texture debug */
 337         //glBegin(GL_QUADS);
 338         //glTexCoord2d( 0.,  0.); glVertex3f(-1.,  0., 0.); // bot left
 339         //glTexCoord2d( 0.,  1.); glVertex3f(-1.,  1., 0.); // top left
 340         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,  1., 0.); // top right
 341         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,  0., 0.); // bot right
 342         //glEnd();
 343
 344         /* Print the color table */
 345         glDisable(GL_TEXTURE_2D);
 346         glDisable(GL_DEPTH_TEST);
 347         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 348         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 349         glBegin(GL_QUADS);
 350         int i;
 351         for (i = 0; i < 256; i++) {
 352                 glColor4ub(colormap->data[i][0],
 353                            colormap->data[i][1],
 354                            colormap->data[i][2],
 355                            colormap->data[i][3]);
 356                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
 357                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
 358                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
 359                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
 360         }
 361         glEnd();
 362         glEnable(GL_DEPTH_TEST);
 363         glEnable(GL_ALPHA_TEST);
 364         glMatrixMode(GL_PROJECTION); glPopMatrix();
 365         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 366         return FALSE;
 367 }
 368
 369 static void on_time_changed(AWeatherView *view, char *time, gpointer user_data)
 370 {
 371         g_message("radar:setting time");
 372         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 373         char *site = aweather_view_get_location(view);
 374         char *base = "http://mesonet.agron.iastate.edu/data/";
 375         char *path = g_strdup_printf("nexrd2/raw/K%s/K%s_%s", site, site, time);
 376
 377         radar = NULL;
 378         cur_sweep = NULL; // Clear radar
 379         gtk_widget_queue_draw(aweather_gui_get_widget(gui, "drawing"));
 380
 381         cache_file(base, path, AWEATHER_AUTOMATIC, load_radar, NULL);
 382         g_free(path);
 383 }
 384
 385 static void on_location_changed(AWeatherView *view, char *site, gpointer user_data)
 386 {
 387         g_message("Loading wsr88d list for %s", site);
 388         char *time = NULL;
 389         update_times(site, &time);
 390         aweather_view_set_time(view, time);
 391
 392         g_free(time);
 393 }
 394
 395 static void on_refresh(AWeatherView *view, gpointer user_data)
 396 {
 397         char *site = aweather_view_get_location(view);
 398         char *time = NULL;
 399         update_times(site, &time);
 400         aweather_view_set_time(view, time);
 401         g_free(time);
 402 }
 403
 404 /* Init */
 405 gboolean radar_init(AWeatherGui *_gui)
 406 {
 407         gui = _gui;
 408         drawing = aweather_gui_get_widget(gui, "drawing");
 409         GtkWidget    *config  = aweather_gui_get_widget(gui, "tabs");
 410         AWeatherView *view    = aweather_gui_get_view(gui);
 411
 412         /* Add configuration tab */
 413         config_body = gtk_alignment_new(0, 0, 1, 1);
 414         gtk_container_set_border_width(GTK_CONTAINER(config_body), 5);
 415         gtk_container_add(GTK_CONTAINER(config_body), gtk_label_new("No radar loaded"));
 416         gtk_notebook_prepend_page(GTK_NOTEBOOK(config), config_body, gtk_label_new("Radar"));
 417
 418         /* Set up OpenGL Stuff */
 419         g_signal_connect(drawing, "expose-event",     G_CALLBACK(on_expose),           NULL);
 420         g_signal_connect(view,    "location-changed", G_CALLBACK(on_location_changed), NULL);
 421         g_signal_connect(view,    "time-changed",     G_CALLBACK(on_time_changed),     NULL);
 422         g_signal_connect(view,    "refresh",          G_CALLBACK(on_refresh),          NULL);
 423
 424         return TRUE;
 425 }