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