Pileus Git - aweather/blob - src/plugins/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 <gio/gio.h>
  22 #include <GL/gl.h>
  23 #include <math.h>
  24 #include <rsl.h>
  25
  26 #include <gis/gis.h>
  27
  28 #include "marching.h"
  29 #include "radar.h"
  30 #include "radar-misc.h"
  31
  32 /****************
  33  * GObject code *
  34  ****************/
  35 /* Plugin init */
  36 static void gis_plugin_radar_plugin_init(GisPluginInterface *iface);
  37 static void gis_plugin_radar_expose(GisPlugin *_radar);
  38 static GtkWidget *gis_plugin_radar_get_config(GisPlugin *_self);
  39 G_DEFINE_TYPE_WITH_CODE(GisPluginRadar, gis_plugin_radar, G_TYPE_OBJECT,
  40                 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
  41                         gis_plugin_radar_plugin_init));
  42 static void gis_plugin_radar_plugin_init(GisPluginInterface *iface)
  43 {
  44         g_debug("GisPluginRadar: plugin_init");
  45         /* Add methods to the interface */
  46         iface->expose     = gis_plugin_radar_expose;
  47         iface->get_config = gis_plugin_radar_get_config;
  48 }
  49 /* Class/Object init */
  50 static void gis_plugin_radar_init(GisPluginRadar *self)
  51 {
  52         g_debug("GisPluginRadar: class_init");
  53         /* Set defaults */
  54         self->soup          = NULL;
  55         self->cur_triangles = NULL;
  56         self->cur_num_triangles = 0;
  57
  58         self->config_body = gtk_alignment_new(0, 0, 1, 1);
  59         gtk_container_set_border_width(GTK_CONTAINER(self->config_body), 5);
  60         gtk_container_add(GTK_CONTAINER(self->config_body), gtk_label_new("No radar loaded"));
  61 }
  62 static void gis_plugin_radar_dispose(GObject *gobject)
  63 {
  64         g_debug("GisPluginRadar: dispose");
  65         GisPluginRadar *self = GIS_PLUGIN_RADAR(gobject);
  66         g_signal_handler_disconnect(self->view, self->time_changed_id);
  67         /* Drop references */
  68         G_OBJECT_CLASS(gis_plugin_radar_parent_class)->dispose(gobject);
  69 }
  70 static void gis_plugin_radar_finalize(GObject *gobject)
  71 {
  72         g_debug("GisPluginRadar: finalize");
  73         GisPluginRadar *self = GIS_PLUGIN_RADAR(gobject);
  74         /* Free data */
  75         G_OBJECT_CLASS(gis_plugin_radar_parent_class)->finalize(gobject);
  76
  77 }
  78 static void gis_plugin_radar_class_init(GisPluginRadarClass *klass)
  79 {
  80         g_debug("GisPluginRadar: class_init");
  81         GObjectClass *gobject_class = (GObjectClass*)klass;
  82         gobject_class->dispose  = gis_plugin_radar_dispose;
  83         gobject_class->finalize = gis_plugin_radar_finalize;
  84 }
  85
  86 /**************************
  87  * Data loading functions *
  88  **************************/
  89 /* Convert a sweep to an 2d array of data points */
  90 static void bscan_sweep(GisPluginRadar *self, Sweep *sweep, colormap_t *colormap,
  91                 guint8 **data, int *width, int *height)
  92 {
  93         /* Calculate max number of bins */
  94         int max_bins = 0;
  95         for (int i = 0; i < sweep->h.nrays; i++)
  96                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  97
  98         /* Allocate buffer using max number of bins for each ray */
  99         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
 100
 101         /* Fill the data */
 102         for (int ri = 0; ri < sweep->h.nrays; ri++) {
 103                 Ray *ray  = sweep->ray[ri];
 104                 for (int bi = 0; bi < ray->h.nbins; bi++) {
 105                         /* copy RGBA into buffer */
 106                         //guint val   = dz_f(ray->range[bi]);
 107                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
 108                         guint  buf_i = (ri*max_bins+bi)*4;
 109                         buf[buf_i+0] = colormap->data[val][0];
 110                         buf[buf_i+1] = colormap->data[val][1];
 111                         buf[buf_i+2] = colormap->data[val][2];
 112                         buf[buf_i+3] = colormap->data[val][3]; // TESTING
 113                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
 114                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
 115                                 buf[buf_i+3] = 0x00; // transparent
 116                         }
 117                 }
 118         }
 119
 120         /* set output */
 121         *width  = max_bins;
 122         *height = sweep->h.nrays;
 123         *data   = buf;
 124 }
 125
 126 /* Load a sweep as the active texture */
 127 static void load_sweep(GisPluginRadar *self, Sweep *sweep)
 128 {
 129         GisOpenGL *opengl = self->opengl;
 130         gis_opengl_begin(opengl);
 131         self->cur_sweep = sweep;
 132         int height, width;
 133         guint8 *data;
 134         bscan_sweep(self, sweep, self->cur_colormap, &data, &width, &height);
 135         glDeleteTextures(1, &self->cur_sweep_tex);
 136         glGenTextures(1, &self->cur_sweep_tex);
 137         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 138         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 139         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 140         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 141         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 142         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
 143                         GL_RGBA, GL_UNSIGNED_BYTE, data);
 144         g_free(data);
 145         gis_opengl_redraw(opengl);
 146         gis_opengl_end(opengl);
 147 }
 148
 149 static void load_colormap(GisPluginRadar *self, gchar *table)
 150 {
 151         /* Set colormap so we can draw it on expose */
 152         for (int i = 0; colormaps[i].name; i++)
 153                 if (g_str_equal(colormaps[i].name, table))
 154                         self->cur_colormap = &colormaps[i];
 155 }
 156
 157 /* Add selectors to the config area for the sweeps */
 158 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self);
 159 static void load_radar_gui(GisPluginRadar *self, Radar *radar)
 160 {
 161         /* Clear existing items */
 162         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 163         if (child)
 164                 gtk_widget_destroy(child);
 165
 166         gdouble elev;
 167         guint rows = 1, cols = 1, cur_cols;
 168         gchar row_label_str[64], col_label_str[64], button_str[64];
 169         GtkWidget *row_label, *col_label, *button = NULL, *elev_box = NULL;
 170         GtkWidget *table = gtk_table_new(rows, cols, FALSE);
 171
 172         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 173                 Volume *vol = radar->v[vi];
 174                 if (vol == NULL) continue;
 175                 rows++; cols = 1; elev = 0;
 176
 177                 /* Row label */
 178                 g_snprintf(row_label_str, 64, "<b>%s:</b>", vol->h.type_str);
 179                 row_label = gtk_label_new(row_label_str);
 180                 gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 181                 gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 182                 gtk_table_attach(GTK_TABLE(table), row_label,
 183                                 0,1, rows-1,rows, GTK_FILL,GTK_FILL, 5,0);
 184
 185                 for (guint si = 0; si < vol->h.nsweeps; si++) {
 186                         Sweep *sweep = vol->sweep[si];
 187                         if (sweep == NULL || sweep->h.elev == 0) continue;
 188                         if (sweep->h.elev != elev) {
 189                                 cols++;
 190                                 elev = sweep->h.elev;
 191
 192                                 /* Column label */
 193                                 g_object_get(table, "n-columns", &cur_cols, NULL);
 194                                 if (cols >  cur_cols) {
 195                                         g_snprintf(col_label_str, 64, "<b>%.2f°</b>", elev);
 196                                         col_label = gtk_label_new(col_label_str);
 197                                         gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 198                                         gtk_widget_set_size_request(col_label, 50, -1);
 199                                         gtk_table_attach(GTK_TABLE(table), col_label,
 200                                                         cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 201                                 }
 202
 203                                 elev_box = gtk_hbox_new(TRUE, 0);
 204                                 gtk_table_attach(GTK_TABLE(table), elev_box,
 205                                                 cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 206                         }
 207
 208
 209                         /* Button */
 210                         g_snprintf(button_str, 64, "%3.2f", elev);
 211                         button = gtk_radio_button_new_with_label_from_widget(
 212                                         GTK_RADIO_BUTTON(button), button_str);
 213                         gtk_widget_set_size_request(button, -1, 26);
 214                         //button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 215                         //gtk_widget_set_size_request(button, -1, 22);
 216                         g_object_set(button, "draw-indicator", FALSE, NULL);
 217                         gtk_box_pack_end(GTK_BOX(elev_box), button, TRUE, TRUE, 0);
 218
 219                         g_object_set_data(G_OBJECT(button), "type",  vol->h.type_str);
 220                         g_object_set_data(G_OBJECT(button), "sweep", sweep);
 221                         g_signal_connect(button, "clicked", G_CALLBACK(on_sweep_clicked), self);
 222                 }
 223         }
 224         gtk_container_add(GTK_CONTAINER(self->config_body), table);
 225         gtk_widget_show_all(table);
 226 }
 227
 228 static void _gis_plugin_radar_grid_set(GRIDCELL *grid, int gi, Ray *ray, int bi)
 229 {
 230         Range range = ray->range[bi];
 231
 232         double angle = d2r(ray->h.azimuth);
 233         double tilt  = d2r(ray->h.elev);
 234
 235         double lx    = sin(angle);
 236         double ly    = cos(angle);
 237         double lz    = sin(tilt);
 238
 239         double dist   = bi*ray->h.gate_size + ray->h.range_bin1;
 240
 241         grid->p[gi].x = lx*dist;
 242         grid->p[gi].y = ly*dist;
 243         grid->p[gi].z = lz*dist;
 244
 245         guint8 val = (guint8)ray->h.f(ray->range[bi]);
 246         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
 247             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO ||
 248             val > 80)
 249                 val = 0;
 250         grid->val[gi] = (float)val;
 251         //g_debug("(%.2f,%.2f,%.2f) - (%.0f,%.0f,%.0f) = %d",
 252         //      angle, tilt, dist,
 253         //      grid->p[gi].x,
 254         //      grid->p[gi].y,
 255         //      grid->p[gi].z,
 256         //      val);
 257 }
 258
 259 /* Load a radar from a decompressed file */
 260 static void load_radar(GisPluginRadar *self, gchar *radar_file)
 261 {
 262         char *dir  = g_path_get_dirname(radar_file);
 263         char *site = g_path_get_basename(dir);
 264         g_free(dir);
 265         g_debug("GisPluginRadar: load_radar - Loading new radar");
 266         RSL_read_these_sweeps("all", NULL);
 267         Radar *radar = self->cur_radar = RSL_wsr88d_to_radar(radar_file, site);
 268         if (radar == NULL) {
 269                 g_warning("fail to load radar: path=%s, site=%s", radar_file, site);
 270                 g_free(site);
 271                 return;
 272         }
 273         g_free(site);
 274
 275 #ifdef MARCHING
 276         /* Load the surface */
 277         if (self->cur_triangles) {
 278                 g_free(self->cur_triangles);
 279                 self->cur_triangles = NULL;
 280         }
 281         self->cur_num_triangles = 0;
 282         int x = 1;
 283         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 284                 if (radar->v[vi] == NULL) continue;
 285
 286                 for (guint si = 0; si+1 < radar->v[vi]->h.nsweeps; si++) {
 287                         Sweep *sweep0 = radar->v[vi]->sweep[si+0];
 288                         Sweep *sweep1 = radar->v[vi]->sweep[si+1];
 289
 290                         //g_debug("_gis_plugin_radar_expose: sweep[%3d-%3d] -- nrays = %d, %d",
 291                         //      si, si+1,sweep0->h.nrays, sweep1->h.nrays);
 292
 293                         /* Skip super->regular resolution switch for now */
 294                         if (sweep0 == NULL || sweep0->h.elev == 0 ||
 295                             sweep1 == NULL || sweep1->h.elev == 0 ||
 296                             sweep0->h.nrays != sweep1->h.nrays)
 297                                 continue;
 298
 299                         /* We repack the arrays so that raysX[0] is always north, etc */
 300                         Ray **rays0 = g_malloc0(sizeof(Ray*)*sweep0->h.nrays);
 301                         Ray **rays1 = g_malloc0(sizeof(Ray*)*sweep1->h.nrays);
 302
 303                         for (guint ri = 0; ri < sweep0->h.nrays; ri++)
 304                                 rays0[(guint)(sweep0->ray[ri]->h.azimuth * sweep0->h.nrays / 360)] =
 305                                         sweep0->ray[ri];
 306                         for (guint ri = 0; ri < sweep1->h.nrays; ri++)
 307                                 rays1[(guint)(sweep1->ray[ri]->h.azimuth * sweep1->h.nrays / 360)] =
 308                                         sweep1->ray[ri];
 309
 310                         for (guint ri = 0; ri+x < sweep0->h.nrays; ri+=x) {
 311                                 //g_debug("_gis_plugin_radar_expose: ray[%3d-%3d] -- nbins = %d, %d, %d, %d",
 312                                 //      ri, ri+x,
 313                                 //      rays0[ri  ]->h.nbins,
 314                                 //      rays0[ri+1]->h.nbins,
 315                                 //      rays1[ri  ]->h.nbins,
 316                                 //      rays1[ri+1]->h.nbins);
 317
 318                                 for (guint bi = 0; bi+x < rays1[ri]->h.nbins; bi+=x) {
 319                                         GRIDCELL grid = {};
 320                                         _gis_plugin_radar_grid_set(&grid, 7, rays0[(ri  )%sweep0->h.nrays], bi+x);
 321                                         _gis_plugin_radar_grid_set(&grid, 6, rays0[(ri+x)%sweep0->h.nrays], bi+x);
 322                                         _gis_plugin_radar_grid_set(&grid, 5, rays0[(ri+x)%sweep0->h.nrays], bi  );
 323                                         _gis_plugin_radar_grid_set(&grid, 4, rays0[(ri  )%sweep0->h.nrays], bi  );
 324                                         _gis_plugin_radar_grid_set(&grid, 3, rays1[(ri  )%sweep0->h.nrays], bi+x);
 325                                         _gis_plugin_radar_grid_set(&grid, 2, rays1[(ri+x)%sweep0->h.nrays], bi+x);
 326                                         _gis_plugin_radar_grid_set(&grid, 1, rays1[(ri+x)%sweep0->h.nrays], bi  );
 327                                         _gis_plugin_radar_grid_set(&grid, 0, rays1[(ri  )%sweep0->h.nrays], bi  );
 328
 329                                         TRIANGLE tris[10];
 330                                         int n = march_one_cube(grid, 40, tris);
 331
 332                                         self->cur_triangles = g_realloc(self->cur_triangles,
 333                                                 (self->cur_num_triangles+n)*sizeof(TRIANGLE));
 334                                         for (int i = 0; i < n; i++) {
 335                                                 //g_debug("triangle: ");
 336                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[0].x, tris[i].p[0].y, tris[i].p[0].z);
 337                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[1].x, tris[i].p[1].y, tris[i].p[1].z);
 338                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[2].x, tris[i].p[2].y, tris[i].p[2].z);
 339                                                 self->cur_triangles[self->cur_num_triangles+i] = tris[i];
 340                                         }
 341                                         self->cur_num_triangles += n;
 342                                         //g_debug(" ");
 343                                 }
 344                         }
 345                 }
 346                 break; // Exit after first volume (reflectivity)
 347         }
 348 #endif
 349
 350         /* Load the first sweep by default */
 351         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 352                 g_warning("No sweeps found\n");
 353         } else {
 354                 /* load first available sweep */
 355                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 356                         if (radar->v[vi]== NULL) continue;
 357                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 358                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 359                                 load_colormap(self, radar->v[vi]->h.type_str);
 360                                 load_sweep(self, radar->v[vi]->sweep[si]);
 361                                 break;
 362                         }
 363                         break;
 364                 }
 365         }
 366
 367         load_radar_gui(self, radar);
 368 }
 369
 370 /*****************
 371  * ASync helpers *
 372  *****************/
 373 typedef struct {
 374         GisPluginRadar *self;
 375         gchar *radar_file;
 376 } decompressed_t;
 377
 378 static void decompressed_cb(GPid pid, gint status, gpointer _udata)
 379 {
 380         g_debug("GisPluginRadar: decompressed_cb");
 381         decompressed_t *udata = _udata;
 382         if (status != 0) {
 383                 g_warning("wsr88ddec exited with status %d", status);
 384                 return;
 385         }
 386         load_radar(udata->self, udata->radar_file);
 387         g_spawn_close_pid(pid);
 388         g_free(udata->radar_file);
 389         g_free(udata);
 390 }
 391
 392 static void cache_chunk_cb(char *path, goffset cur, goffset total, gpointer _self)
 393 {
 394         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 395         double percent = (double)cur/total;
 396
 397         //g_message("GisPluginRadar: cache_chunk_cb - %lld/%lld = %.2f%%",
 398         //              cur, total, percent*100);
 399
 400         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(self->progress_bar), MIN(percent, 1.0));
 401
 402         gchar *msg = g_strdup_printf("Loading radar... %5.1f%% (%.2f/%.2f MB)",
 403                         percent*100, (double)cur/1000000, (double)total/1000000);
 404         gtk_label_set_text(GTK_LABEL(self->progress_label), msg);
 405         g_free(msg);
 406 }
 407
 408 static void cache_done_cb(char *path, gboolean updated, gpointer _self)
 409 {
 410         g_debug("GisPluginRadar: cache_done_cb - updated = %d", updated);
 411         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 412         char *decompressed = g_strconcat(path, ".raw", NULL);
 413         if (!updated && g_file_test(decompressed, G_FILE_TEST_EXISTS)) {
 414                 load_radar(self, decompressed);
 415                 return;
 416         }
 417
 418         decompressed_t *udata = g_malloc(sizeof(decompressed_t));
 419         udata->self       = self;
 420         udata->radar_file = decompressed;
 421         g_debug("GisPluginRadar: cache_done_cb - File updated, decompressing..");
 422         char *argv[] = {"wsr88ddec", path, decompressed, NULL};
 423         GPid pid;
 424         GError *error = NULL;
 425         g_spawn_async(
 426                 NULL,    // const gchar *working_directory,
 427                 argv,    // gchar **argv,
 428                 NULL,    // gchar **envp,
 429                 G_SPAWN_SEARCH_PATH|
 430                 G_SPAWN_DO_NOT_REAP_CHILD,
 431                          // GSpawnFlags flags,
 432                 NULL,    // GSpawnChildSetupFunc child_setup,
 433                 NULL,    // gpointer user_data,
 434                 &pid,    // GPid *child_pid,
 435                 &error); // GError **error
 436         if (error) {
 437                 g_warning("failed to decompress WSR88D data: %s",
 438                                 error->message);
 439                 g_error_free(error);
 440         }
 441         g_child_watch_add(pid, decompressed_cb, udata);
 442         self->soup = NULL;
 443 }
 444
 445 /*************
 446  * Callbacks *
 447  *************/
 448 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self)
 449 {
 450         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 451         load_colormap(self, g_object_get_data(G_OBJECT(button), "type" ));
 452         load_sweep   (self, g_object_get_data(G_OBJECT(button), "sweep"));
 453 }
 454
 455 static void on_time_changed(GisView *view, const char *time, gpointer _self)
 456 {
 457         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 458         g_debug("GisPluginRadar: on_time_changed - setting time=%s", time);
 459         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 460         char *site = gis_view_get_site(view);
 461         char *path = g_strdup_printf("nexrd2/raw/%s/%s_%s", site, site, time);
 462
 463         /* Set up progress bar */
 464         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 465         if (child) gtk_widget_destroy(child);
 466
 467         GtkWidget *vbox = gtk_vbox_new(FALSE, 10);
 468         gtk_container_set_border_width(GTK_CONTAINER(vbox), 10);
 469         self->progress_bar   = gtk_progress_bar_new();
 470         self->progress_label = gtk_label_new("Loading radar...");
 471         gtk_box_pack_start(GTK_BOX(vbox), self->progress_bar,   FALSE, FALSE, 0);
 472         gtk_box_pack_start(GTK_BOX(vbox), self->progress_label, FALSE, FALSE, 0);
 473         gtk_container_add(GTK_CONTAINER(self->config_body), vbox);
 474         gtk_widget_show_all(self->config_body);
 475
 476         /* Clear radar */
 477         if (self->cur_radar)
 478                 RSL_free_radar(self->cur_radar);
 479         self->cur_radar = NULL;
 480         self->cur_sweep = NULL;
 481         gis_opengl_redraw(self->opengl);
 482
 483         /* Start loading the new radar */
 484         if (self->soup) {
 485                 soup_session_abort(self->soup);
 486                 self->soup = NULL;
 487         }
 488         gchar *base = gis_prefs_get_string(self->prefs, "aweather/nexrad_url");
 489         if (gis_world_get_offline(self->world))
 490                 self->soup = cache_file(base, path, GIS_ONCE,
 491                                 cache_chunk_cb, cache_done_cb, self);
 492         else
 493                 self->soup = cache_file(base, path, GIS_UPDATE,
 494                                 cache_chunk_cb, cache_done_cb, self);
 495         g_free(path);
 496 }
 497
 498 /***********
 499  * Methods *
 500  ***********/
 501 GisPluginRadar *gis_plugin_radar_new(GisWorld *world, GisView *view, GisOpenGL *opengl, GisPrefs *prefs)
 502 {
 503         /* TODO: move to constructor if possible */
 504         g_debug("GisPluginRadar: new");
 505         GisPluginRadar *self = g_object_new(GIS_TYPE_PLUGIN_RADAR, NULL);
 506         self->world  = world;
 507         self->view   = view;
 508         self->opengl = opengl;
 509         self->prefs  = prefs;
 510         self->time_changed_id = g_signal_connect(view, "time-changed",
 511                         G_CALLBACK(on_time_changed), self);
 512         return self;
 513 }
 514
 515 static GtkWidget *gis_plugin_radar_get_config(GisPlugin *_self)
 516 {
 517         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 518         return self->config_body;
 519 }
 520
 521 static void gis_plugin_radar_expose(GisPlugin *_self)
 522 {
 523         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 524         g_debug("GisPluginRadar: expose");
 525         if (self->cur_sweep == NULL)
 526                 return;
 527         Sweep *sweep = self->cur_sweep;
 528
 529 #ifdef MARCHING
 530         /* Draw the surface */
 531         glMatrixMode(GL_MODELVIEW);
 532         glPushMatrix();
 533         glDisable(GL_TEXTURE_2D);
 534         float light_ambient[]  = {0.1f, 0.1f, 0.0f};
 535         float light_diffuse[]  = {0.9f, 0.9f, 0.9f};
 536         float light_position[] = {-300000.0f, 500000.0f, 400000.0f, 1.0f};
 537         glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
 538         glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
 539         glLightfv(GL_LIGHT0, GL_POSITION, light_position);
 540         glEnable(GL_LIGHT0);
 541         glEnable(GL_LIGHTING);
 542         glEnable(GL_COLOR_MATERIAL);
 543         glColor4f(1,1,1,0.75);
 544         g_debug("ntri=%d", self->cur_num_triangles);
 545         glBegin(GL_TRIANGLES);
 546         for (int i = 0; i < self->cur_num_triangles; i++) {
 547                 TRIANGLE t = self->cur_triangles[i];
 548                 do_normal(t.p[0].x, t.p[0].y, t.p[0].z,
 549                           t.p[1].x, t.p[1].y, t.p[1].z,
 550                           t.p[2].x, t.p[2].y, t.p[2].z);
 551                 glVertex3f(t.p[0].x, t.p[0].y, t.p[0].z);
 552                 glVertex3f(t.p[1].x, t.p[1].y, t.p[1].z);
 553                 glVertex3f(t.p[2].x, t.p[2].y, t.p[2].z);
 554         }
 555         glEnd();
 556         glPopMatrix();
 557 #endif
 558
 559         /* Draw the rays */
 560         glDisable(GL_LIGHTING);
 561         glDisable(GL_COLOR_MATERIAL);
 562         glMatrixMode(GL_MODELVIEW);
 563         glPushMatrix();
 564         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 565         glEnable(GL_TEXTURE_2D);
 566         glDisable(GL_ALPHA_TEST);
 567         glColor4f(1,1,1,1);
 568         glBegin(GL_QUAD_STRIP);
 569         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 570                 Ray  *ray = NULL;
 571                 double angle = 0;
 572                 if (ri < sweep->h.nrays) {
 573                         ray = sweep->ray[ri];
 574                         angle = d2r(ray->h.azimuth - ((double)ray->h.beam_width/2.));
 575                 } else {
 576                         /* Do the right side of the last sweep */
 577                         ray = sweep->ray[ri-1];
 578                         angle = d2r(ray->h.azimuth + ((double)ray->h.beam_width/2.));
 579                 }
 580
 581                 double lx = sin(angle);
 582                 double ly = cos(angle);
 583
 584                 double near_dist = ray->h.range_bin1;
 585                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 586
 587                 /* (find middle of bin) / scale for opengl */
 588                 // near left
 589                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays-0.01);
 590                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 591
 592                 // far  left
 593                 // todo: correct range-height function
 594                 double height = sin(d2r(ray->h.elev)) * far_dist;
 595                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays-0.01);
 596                 glVertex3f(lx*far_dist,  ly*far_dist, height);
 597         }
 598         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 599         glEnd();
 600         glPopMatrix();
 601
 602         /* Texture debug */
 603         //glBegin(GL_QUADS);
 604         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 605         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 606         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 607         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 608         //glEnd();
 609
 610         /* Print the color table */
 611         glDisable(GL_TEXTURE_2D);
 612         glDisable(GL_DEPTH_TEST);
 613         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 614         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 615         glBegin(GL_QUADS);
 616         int i;
 617         for (i = 0; i < 256; i++) {
 618                 glColor4ub(self->cur_colormap->data[i][0],
 619                            self->cur_colormap->data[i][1],
 620                            self->cur_colormap->data[i][2],
 621                            self->cur_colormap->data[i][3]);
 622                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
 623                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
 624                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
 625                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
 626         }
 627         glEnd();
 628         glEnable(GL_DEPTH_TEST);
 629         glEnable(GL_ALPHA_TEST);
 630         glMatrixMode(GL_PROJECTION); glPopMatrix();
 631         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 632 }