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