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 guint sweep_tex = 0;
  36
  37 static AWeatherGui *gui = NULL;
  38 static Radar *radar = NULL;
  39
  40 /**************************
  41  * Data loading functions *
  42  **************************/
  43 /* return a GL alpha value for a radar pixle */
  44 static guint8 get_alpha(guint8 db)
  45 {
  46         if (db == BADVAL) return 0;
  47         if (db == RFVAL ) return 0;
  48         if (db == APFLAG) return 0;
  49         if (db == NOECHO) return 0;
  50         if (db == 0     ) return 0;
  51         //if      (db > 60) return 0;
  52         //else if (db < 10) return 0;
  53         //else if (db < 25) return (db-10)*(255.0/15);
  54         else              return 255;
  55 }
  56
  57 /* Convert a sweep to an 2d array of data points */
  58 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
  59 {
  60         /* Calculate max number of bins */
  61         int i, max_bins = 0;
  62         for (i = 0; i < sweep->h.nrays; i++)
  63                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  64
  65         /* Allocate buffer using max number of bins for each ray */
  66         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  67
  68         /* Fill the data */
  69         int ri, bi;
  70         for (ri = 0; ri < sweep->h.nrays; ri++) {
  71                 Ray *ray  = sweep->ray[ri];
  72                 for (bi = 0; bi < ray->h.nbins; bi++) {
  73                         /* copy RGBA into buffer */
  74                         //guint val   = dz_f(ray->range[bi]);
  75                         guint val   = ray->h.f(ray->range[bi]);
  76                         guint buf_i = (ri*max_bins+bi)*4;
  77                         buf[buf_i+0] =   red[val];
  78                         buf[buf_i+1] = green[val];
  79                         buf[buf_i+2] =  blue[val];
  80                         buf[buf_i+3] = get_alpha(val);
  81                 }
  82         }
  83
  84         /* set output */
  85         *width  = max_bins;
  86         *height = sweep->h.nrays;
  87         *data   = buf;
  88 }
  89
  90 static void load_color_table(char *table)
  91 {
  92         /* TODO: replace this with a better color table */
  93         g_message("loading color table");
  94         if (g_str_equal(table, "Velocity"))
  95                 RSL_load_vel_color_table();
  96         else if (g_str_equal(table, "Spectrum width"))
  97                 RSL_load_sw_color_table();
  98         else
  99                 RSL_load_refl_color_table();
 100         RSL_get_color_table(RSL_RED_TABLE,   red,   &nred);
 101         RSL_get_color_table(RSL_GREEN_TABLE, green, &ngreen);
 102         RSL_get_color_table(RSL_BLUE_TABLE,  blue,  &nblue);
 103 }
 104
 105 /* Load a sweep as the active texture */
 106 static void load_sweep(Sweep *sweep)
 107 {
 108         aweather_gui_gl_begin(gui);
 109         cur_sweep = sweep;
 110         int height, width;
 111         guint8 *data;
 112         bscan_sweep(sweep, &data, &width, &height);
 113         glGenTextures(1, &sweep_tex);
 114         glBindTexture(GL_TEXTURE_2D, sweep_tex);
 115         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 116         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 117         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 118         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 119         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
 120         g_free(data);
 121         gdk_window_invalidate_rect(drawing->window, &drawing->allocation, FALSE);
 122         gdk_window_process_updates(drawing->window, FALSE);
 123         aweather_gui_gl_end(gui);
 124 }
 125
 126 /* Add selectors to the config area for the sweeps */
 127 static void load_radar_gui(Radar *radar)
 128 {
 129         /* Clear existing items */
 130         GtkWidget *child = gtk_bin_get_child(GTK_BIN(config_body));
 131         if (child)
 132                 gtk_widget_destroy(child);
 133
 134         GtkWidget *hbox = gtk_hbox_new(TRUE, 0);
 135         GtkWidget *button = NULL;
 136         int vi = 0, si = 0;
 137         for (vi = 0; vi < radar->h.nvolumes; vi++) {
 138                 Volume *vol = radar->v[vi];
 139                 if (vol == NULL) continue;
 140                 GtkWidget *vbox = gtk_vbox_new(TRUE, 0);
 141                 for (si = vol->h.nsweeps-1; si >= 0; si--) {
 142                         Sweep *sweep = vol->sweep[si];
 143                         if (sweep == NULL) continue;
 144                         char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
 145                         button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
 146                         g_object_set(button, "draw-indicator", FALSE, NULL);
 147                         g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_color_table), vol->h.type_str);
 148                         g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
 149                         gtk_box_pack_start(GTK_BOX(vbox), button, FALSE, TRUE, 0);
 150                         g_free(label);
 151                 }
 152                 gtk_box_set_homogeneous(GTK_BOX(vbox), FALSE);
 153                 gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
 154         }
 155         gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(config_body), hbox);
 156         gtk_widget_show_all(hbox);
 157 }
 158
 159 /* Load a radar from a file */
 160 static void load_radar_rsl(GPid pid, gint status, gpointer _path)
 161 {
 162         gchar *path = _path;
 163         if (status != 0) {
 164                 g_warning("wsr88ddec exited with status %d", status);
 165                 return;
 166         }
 167         char *site = g_path_get_basename(g_path_get_dirname(path));
 168         if (radar) RSL_free_radar(radar);
 169         RSL_read_these_sweeps("all", NULL);
 170         radar = RSL_wsr88d_to_radar(path, site);
 171         if (radar == NULL) {
 172                 g_warning("fail to load radar: path=%s, site=%s", path, site);
 173                 return;
 174         }
 175
 176         /* Load the first sweep by default */
 177         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 178                 g_warning("No sweeps found\n");
 179         } else {
 180                 /* load first available sweep */
 181                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 182                         if (radar->v[vi]== NULL) continue;
 183                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 184                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 185                                 load_color_table(radar->v[vi]->h.type_str);
 186                                 load_sweep(radar->v[vi]->sweep[si]);
 187                                 break;
 188                         }
 189                         break;
 190                 }
 191         }
 192
 193         load_radar_gui(radar);
 194 }
 195
 196 /* decompress a radar file, then chain to the actuall loading function */
 197 static void load_radar(char *path, gpointer user_data)
 198 {
 199         char *raw  = g_strconcat(path, ".raw", NULL);
 200         if (g_file_test(raw, G_FILE_TEST_EXISTS)) {
 201                 load_radar_rsl(0, 0, raw);
 202         } else {
 203                 char *argv[] = {"wsr88ddec", path, raw, NULL};
 204                 GPid pid;
 205                 GError *error = NULL;
 206                 g_spawn_async(
 207                         NULL,    // const gchar *working_directory,
 208                         argv,    // gchar **argv,
 209                         NULL,    // gchar **envp,
 210                         G_SPAWN_SEARCH_PATH|
 211                         G_SPAWN_DO_NOT_REAP_CHILD,
 212                                  // GSpawnFlags flags,
 213                         NULL,    // GSpawnChildSetupFunc child_setup,
 214                         NULL,    // gpointer user_data,
 215                         &pid,    // GPid *child_pid,
 216                         &error); // GError **error
 217                 if (error)
 218                         g_warning("failed to decompress WSR88D data: %s", error->message);
 219                 g_child_watch_add(pid, load_radar_rsl, raw);
 220         }
 221 }
 222
 223 /*************
 224  * Callbacks *
 225  *************/
 226 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
 227 {
 228         g_message("radar:expose");
 229         if (cur_sweep == NULL)
 230                 return FALSE;
 231         Sweep *sweep = cur_sweep;
 232
 233         /* Draw the rays */
 234
 235         glMatrixMode(GL_MODELVIEW);
 236         glPushMatrix();
 237         glBindTexture(GL_TEXTURE_2D, sweep_tex);
 238         glEnable(GL_TEXTURE_2D);
 239         glDisable(GL_ALPHA_TEST);
 240         glColor4f(1,1,1,1);
 241         glBegin(GL_QUAD_STRIP);
 242         for (int ri = 0; ri <= sweep->h.nrays+1; ri++) {
 243                 /* Do the first sweep twice to complete the last Quad */
 244                 Ray *ray = sweep->ray[ri % sweep->h.nrays];
 245
 246                 /* right and left looking out from radar */
 247                 double left  = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 248                 //double right = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 249
 250                 double lx = sin(left);
 251                 double ly = cos(left);
 252
 253                 double near_dist = ray->h.range_bin1;
 254                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 255
 256                 /* (find middle of bin) / scale for opengl */
 257                 // near left
 258                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays);
 259                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 260
 261                 // far  left
 262                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays);
 263                 glVertex3f(lx*far_dist,  ly*far_dist,  2.0);
 264         }
 265         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 266         glEnd();
 267         glPopMatrix();
 268
 269         /* Texture debug */
 270         //glBegin(GL_QUADS);
 271         //glTexCoord2d( 0.,  0.); glVertex3f(-1.,  0., 0.); // bot left
 272         //glTexCoord2d( 0.,  1.); glVertex3f(-1.,  1., 0.); // top left
 273         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,  1., 0.); // top right
 274         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,  0., 0.); // bot right
 275         //glEnd();
 276
 277         /* Print the color table */
 278         glDisable(GL_TEXTURE_2D);
 279         glDisable(GL_DEPTH_TEST);
 280         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 281         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 282         glBegin(GL_QUADS);
 283         int i;
 284         for (i = 0; i < nred; i++) {
 285                 glColor4ub(red[i], green[i], blue[i], get_alpha(i));
 286                 glVertex3f(-1.0, (float)((i  ) - nred/2)/(nred/2), 0.0); // bot left
 287                 glVertex3f(-1.0, (float)((i+1) - nred/2)/(nred/2), 0.0); // top left
 288                 glVertex3f(-0.9, (float)((i+1) - nred/2)/(nred/2), 0.0); // top right
 289                 glVertex3f(-0.9, (float)((i  ) - nred/2)/(nred/2), 0.0); // bot right
 290         }
 291         glEnd();
 292         glEnable(GL_DEPTH_TEST);
 293         glEnable(GL_ALPHA_TEST);
 294         glMatrixMode(GL_PROJECTION); glPopMatrix();
 295         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 296         return FALSE;
 297 }
 298
 299 static void set_time(AWeatherView *view, char *time, gpointer user_data)
 300 {
 301         g_message("radar:setting time");
 302         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 303         char *site = aweather_view_get_location(view);
 304         char *base = "http://mesonet.agron.iastate.edu/data/";
 305         char *path = g_strdup_printf("nexrd2/raw/K%s/K%s_%s", site, site, time);
 306         //g_message("caching %s/%s", base, path);
 307         cache_file(base, path, load_radar, NULL);
 308 }
 309
 310 static void set_site(AWeatherView *view, char *site, gpointer user_data)
 311 {
 312         g_message("Loading wsr88d list for %s", site);
 313         gchar *data;
 314         gsize length;
 315         GError *error = NULL;
 316         char *list_uri = g_strdup_printf("http://mesonet.agron.iastate.edu/data/nexrd2/raw/K%s/dir.list", site);
 317         GFile *list    = g_file_new_for_uri(list_uri);
 318         g_file_load_contents(list, NULL, &data, &length, NULL, &error);
 319         if (error) {
 320                 g_warning("Error loading list for %s: %s", site, error->message);
 321                 return;
 322         }
 323         gchar **lines = g_strsplit(data, "\n", -1);
 324         GtkTreeView  *tview  = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
 325         GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
 326         gtk_list_store_clear(lstore);
 327         radar = NULL;
 328         char *time = NULL;
 329         for (int i = 0; lines[i] && lines[i][0]; i++) {
 330                 // format: `841907 KABR_20090510_0159'
 331                 //g_message("\tadding %p [%s]", lines[i], lines[i]);
 332                 char **parts = g_strsplit(lines[i], " ", 2);
 333                 time = parts[1]+5;
 334                 GtkTreeIter iter;
 335                 gtk_list_store_insert(lstore, &iter, 0);
 336                 gtk_list_store_set(lstore, &iter, 0, time, -1);
 337         }
 338         if (time != NULL)
 339                 aweather_view_set_time(view, time);
 340 }
 341
 342 /* Init */
 343 gboolean radar_init(AWeatherGui *_gui)
 344 {
 345         gui = _gui;
 346         drawing = aweather_gui_get_widget(gui, "drawing");
 347         GtkNotebook    *config  = GTK_NOTEBOOK(aweather_gui_get_widget(gui, "tabs"));
 348         AWeatherView   *view    = aweather_gui_get_view(gui);
 349
 350         /* Add configuration tab */
 351         config_body = gtk_scrolled_window_new(NULL, NULL);
 352         gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(config_body), gtk_label_new("No radar loaded"));
 353         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(config_body), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 354         gtk_notebook_append_page(GTK_NOTEBOOK(config), config_body, gtk_label_new("Radar"));
 355
 356         /* Set up OpenGL Stuff */
 357         g_signal_connect(drawing, "expose-event",     G_CALLBACK(expose),   NULL);
 358         g_signal_connect(view,    "location-changed", G_CALLBACK(set_site), NULL);
 359         g_signal_connect(view,    "time-changed",     G_CALLBACK(set_time), NULL);
 360
 361         return TRUE;
 362 }