Pileus Git - grits/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 *radar)
  51 {
  52         g_debug("GisPluginRadar: class_init");
  53         /* Set defaults */
  54         radar->soup          = NULL;
  55         radar->cur_triangles = NULL;
  56         radar->cur_num_triangles = 0;
  57 }
  58 static void gis_plugin_radar_dispose(GObject *gobject)
  59 {
  60         g_debug("GisPluginRadar: dispose");
  61         GisPluginRadar *self = GIS_PLUGIN_RADAR(gobject);
  62         /* Drop references */
  63         G_OBJECT_CLASS(gis_plugin_radar_parent_class)->dispose(gobject);
  64 }
  65 static void gis_plugin_radar_finalize(GObject *gobject)
  66 {
  67         g_debug("GisPluginRadar: finalize");
  68         GisPluginRadar *self = GIS_PLUGIN_RADAR(gobject);
  69         /* Free data */
  70         G_OBJECT_CLASS(gis_plugin_radar_parent_class)->finalize(gobject);
  71
  72 }
  73 static void gis_plugin_radar_class_init(GisPluginRadarClass *klass)
  74 {
  75         g_debug("GisPluginRadar: class_init");
  76         GObjectClass *gobject_class = (GObjectClass*)klass;
  77         gobject_class->dispose  = gis_plugin_radar_dispose;
  78         gobject_class->finalize = gis_plugin_radar_finalize;
  79 }
  80
  81 /**************************
  82  * Data loading functions *
  83  **************************/
  84 /* Convert a sweep to an 2d array of data points */
  85 static void bscan_sweep(GisPluginRadar *self, Sweep *sweep, colormap_t *colormap,
  86                 guint8 **data, int *width, int *height)
  87 {
  88         /* Calculate max number of bins */
  89         int max_bins = 0;
  90         for (int i = 0; i < sweep->h.nrays; i++)
  91                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  92
  93         /* Allocate buffer using max number of bins for each ray */
  94         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  95
  96         /* Fill the data */
  97         for (int ri = 0; ri < sweep->h.nrays; ri++) {
  98                 Ray *ray  = sweep->ray[ri];
  99                 for (int bi = 0; bi < ray->h.nbins; bi++) {
 100                         /* copy RGBA into buffer */
 101                         //guint val   = dz_f(ray->range[bi]);
 102                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
 103                         guint  buf_i = (ri*max_bins+bi)*4;
 104                         buf[buf_i+0] = colormap->data[val][0];
 105                         buf[buf_i+1] = colormap->data[val][1];
 106                         buf[buf_i+2] = colormap->data[val][2];
 107                         buf[buf_i+3] = colormap->data[val][3]; // TESTING
 108                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
 109                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
 110                                 buf[buf_i+3] = 0x00; // transparent
 111                         }
 112                 }
 113         }
 114
 115         /* set output */
 116         *width  = max_bins;
 117         *height = sweep->h.nrays;
 118         *data   = buf;
 119 }
 120
 121 /* Load a sweep as the active texture */
 122 static void load_sweep(GisPluginRadar *self, Sweep *sweep)
 123 {
 124         GisOpenGL *opengl = self->opengl;
 125         gis_opengl_begin(opengl);
 126         self->cur_sweep = sweep;
 127         int height, width;
 128         guint8 *data;
 129         bscan_sweep(self, sweep, self->cur_colormap, &data, &width, &height);
 130         glDeleteTextures(1, &self->cur_sweep_tex);
 131         glGenTextures(1, &self->cur_sweep_tex);
 132         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 133         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 134         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 135         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 136         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 137         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
 138                         GL_RGBA, GL_UNSIGNED_BYTE, data);
 139         g_free(data);
 140         gis_opengl_redraw(opengl);
 141         gis_opengl_end(opengl);
 142 }
 143
 144 static void load_colormap(GisPluginRadar *self, gchar *table)
 145 {
 146         /* Set colormap so we can draw it on expose */
 147         for (int i = 0; colormaps[i].name; i++)
 148                 if (g_str_equal(colormaps[i].name, table))
 149                         self->cur_colormap = &colormaps[i];
 150 }
 151
 152 /* Add selectors to the config area for the sweeps */
 153 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self);
 154 static void load_radar_gui(GisPluginRadar *self, Radar *radar)
 155 {
 156         /* Clear existing items */
 157         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 158         if (child)
 159                 gtk_widget_destroy(child);
 160
 161         gdouble elev;
 162         guint rows = 1, cols = 1, cur_cols;
 163         gchar row_label_str[64], col_label_str[64], button_str[64];
 164         GtkWidget *row_label, *col_label, *button = NULL, *elev_box = NULL;
 165         GtkWidget *table = gtk_table_new(rows, cols, FALSE);
 166
 167         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 168                 Volume *vol = radar->v[vi];
 169                 if (vol == NULL) continue;
 170                 rows++; cols = 1; elev = 0;
 171
 172                 /* Row label */
 173                 g_snprintf(row_label_str, 64, "<b>%s:</b>", vol->h.type_str);
 174                 row_label = gtk_label_new(row_label_str);
 175                 gtk_label_set_use_markup(GTK_LABEL(row_label), TRUE);
 176                 gtk_misc_set_alignment(GTK_MISC(row_label), 1, 0.5);
 177                 gtk_table_attach(GTK_TABLE(table), row_label,
 178                                 0,1, rows-1,rows, GTK_FILL,GTK_FILL, 5,0);
 179
 180                 for (guint si = 0; si < vol->h.nsweeps; si++) {
 181                         Sweep *sweep = vol->sweep[si];
 182                         if (sweep == NULL || sweep->h.elev == 0) continue;
 183                         if (sweep->h.elev != elev) {
 184                                 cols++;
 185                                 elev = sweep->h.elev;
 186
 187                                 /* Column label */
 188                                 g_object_get(table, "n-columns", &cur_cols, NULL);
 189                                 if (cols >  cur_cols) {
 190                                         g_snprintf(col_label_str, 64, "<b>%.2f°</b>", elev);
 191                                         col_label = gtk_label_new(col_label_str);
 192                                         gtk_label_set_use_markup(GTK_LABEL(col_label), TRUE);
 193                                         gtk_widget_set_size_request(col_label, 50, -1);
 194                                         gtk_table_attach(GTK_TABLE(table), col_label,
 195                                                         cols-1,cols, 0,1, GTK_FILL,GTK_FILL, 0,0);
 196                                 }
 197
 198                                 elev_box = gtk_hbox_new(TRUE, 0);
 199                                 gtk_table_attach(GTK_TABLE(table), elev_box,
 200                                                 cols-1,cols, rows-1,rows, GTK_FILL,GTK_FILL, 0,0);
 201                         }
 202
 203
 204                         /* Button */
 205                         g_snprintf(button_str, 64, "%3.2f", elev);
 206                         button = gtk_radio_button_new_with_label_from_widget(
 207                                         GTK_RADIO_BUTTON(button), button_str);
 208                         gtk_widget_set_size_request(button, -1, 26);
 209                         //button = gtk_radio_button_new_from_widget(GTK_RADIO_BUTTON(button));
 210                         //gtk_widget_set_size_request(button, -1, 22);
 211                         g_object_set(button, "draw-indicator", FALSE, NULL);
 212                         gtk_box_pack_end(GTK_BOX(elev_box), button, TRUE, TRUE, 0);
 213
 214                         g_object_set_data(G_OBJECT(button), "type",  vol->h.type_str);
 215                         g_object_set_data(G_OBJECT(button), "sweep", sweep);
 216                         g_signal_connect(button, "clicked", G_CALLBACK(on_sweep_clicked), self);
 217                 }
 218         }
 219         gtk_container_add(GTK_CONTAINER(self->config_body), table);
 220         gtk_widget_show_all(table);
 221 }
 222
 223 static void _gis_plugin_radar_grid_set(GRIDCELL *grid, int gi, Ray *ray, int bi)
 224 {
 225         Range range = ray->range[bi];
 226
 227         double angle = d2r(ray->h.azimuth);
 228         double tilt  = d2r(ray->h.elev);
 229
 230         double lx    = sin(angle);
 231         double ly    = cos(angle);
 232         double lz    = sin(tilt);
 233
 234         double dist   = bi*ray->h.gate_size + ray->h.range_bin1;
 235
 236         grid->p[gi].x = lx*dist;
 237         grid->p[gi].y = ly*dist;
 238         grid->p[gi].z = lz*dist;
 239
 240         guint8 val = (guint8)ray->h.f(ray->range[bi]);
 241         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
 242             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO ||
 243             val > 80)
 244                 val = 0;
 245         grid->val[gi] = (float)val;
 246         //g_debug("(%.2f,%.2f,%.2f) - (%.0f,%.0f,%.0f) = %d",
 247         //      angle, tilt, dist,
 248         //      grid->p[gi].x,
 249         //      grid->p[gi].y,
 250         //      grid->p[gi].z,
 251         //      val);
 252 }
 253
 254 /* Load a radar from a decompressed file */
 255 static void load_radar(GisPluginRadar *self, gchar *radar_file)
 256 {
 257         char *dir  = g_path_get_dirname(radar_file);
 258         char *site = g_path_get_basename(dir);
 259         g_free(dir);
 260         g_debug("GisPluginRadar: load_radar - Loading new radar");
 261         RSL_read_these_sweeps("all", NULL);
 262         Radar *radar = self->cur_radar = RSL_wsr88d_to_radar(radar_file, site);
 263         if (radar == NULL) {
 264                 g_warning("fail to load radar: path=%s, site=%s", radar_file, site);
 265                 g_free(site);
 266                 return;
 267         }
 268         g_free(site);
 269
 270 #ifdef MARCHING
 271         /* Load the surface */
 272         if (self->cur_triangles) {
 273                 g_free(self->cur_triangles);
 274                 self->cur_triangles = NULL;
 275         }
 276         self->cur_num_triangles = 0;
 277         int x = 1;
 278         for (guint vi = 0; vi < radar->h.nvolumes; vi++) {
 279                 if (radar->v[vi] == NULL) continue;
 280
 281                 for (guint si = 0; si+1 < radar->v[vi]->h.nsweeps; si++) {
 282                         Sweep *sweep0 = radar->v[vi]->sweep[si+0];
 283                         Sweep *sweep1 = radar->v[vi]->sweep[si+1];
 284
 285                         //g_debug("_gis_plugin_radar_expose: sweep[%3d-%3d] -- nrays = %d, %d",
 286                         //      si, si+1,sweep0->h.nrays, sweep1->h.nrays);
 287
 288                         /* Skip super->regular resolution switch for now */
 289                         if (sweep0 == NULL || sweep0->h.elev == 0 ||
 290                             sweep1 == NULL || sweep1->h.elev == 0 ||
 291                             sweep0->h.nrays != sweep1->h.nrays)
 292                                 continue;
 293
 294                         /* We repack the arrays so that raysX[0] is always north, etc */
 295                         Ray **rays0 = g_malloc0(sizeof(Ray*)*sweep0->h.nrays);
 296                         Ray **rays1 = g_malloc0(sizeof(Ray*)*sweep1->h.nrays);
 297
 298                         for (guint ri = 0; ri < sweep0->h.nrays; ri++)
 299                                 rays0[(guint)(sweep0->ray[ri]->h.azimuth * sweep0->h.nrays / 360)] =
 300                                         sweep0->ray[ri];
 301                         for (guint ri = 0; ri < sweep1->h.nrays; ri++)
 302                                 rays1[(guint)(sweep1->ray[ri]->h.azimuth * sweep1->h.nrays / 360)] =
 303                                         sweep1->ray[ri];
 304
 305                         for (guint ri = 0; ri+x < sweep0->h.nrays; ri+=x) {
 306                                 //g_debug("_gis_plugin_radar_expose: ray[%3d-%3d] -- nbins = %d, %d, %d, %d",
 307                                 //      ri, ri+x,
 308                                 //      rays0[ri  ]->h.nbins,
 309                                 //      rays0[ri+1]->h.nbins,
 310                                 //      rays1[ri  ]->h.nbins,
 311                                 //      rays1[ri+1]->h.nbins);
 312
 313                                 for (guint bi = 0; bi+x < rays1[ri]->h.nbins; bi+=x) {
 314                                         GRIDCELL grid = {};
 315                                         _gis_plugin_radar_grid_set(&grid, 7, rays0[(ri  )%sweep0->h.nrays], bi+x);
 316                                         _gis_plugin_radar_grid_set(&grid, 6, rays0[(ri+x)%sweep0->h.nrays], bi+x);
 317                                         _gis_plugin_radar_grid_set(&grid, 5, rays0[(ri+x)%sweep0->h.nrays], bi  );
 318                                         _gis_plugin_radar_grid_set(&grid, 4, rays0[(ri  )%sweep0->h.nrays], bi  );
 319                                         _gis_plugin_radar_grid_set(&grid, 3, rays1[(ri  )%sweep0->h.nrays], bi+x);
 320                                         _gis_plugin_radar_grid_set(&grid, 2, rays1[(ri+x)%sweep0->h.nrays], bi+x);
 321                                         _gis_plugin_radar_grid_set(&grid, 1, rays1[(ri+x)%sweep0->h.nrays], bi  );
 322                                         _gis_plugin_radar_grid_set(&grid, 0, rays1[(ri  )%sweep0->h.nrays], bi  );
 323
 324                                         TRIANGLE tris[10];
 325                                         int n = march_one_cube(grid, 40, tris);
 326
 327                                         self->cur_triangles = g_realloc(self->cur_triangles,
 328                                                 (self->cur_num_triangles+n)*sizeof(TRIANGLE));
 329                                         for (int i = 0; i < n; i++) {
 330                                                 //g_debug("triangle: ");
 331                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[0].x, tris[i].p[0].y, tris[i].p[0].z);
 332                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[1].x, tris[i].p[1].y, tris[i].p[1].z);
 333                                                 //g_debug("\t(%f,%f,%f)", tris[i].p[2].x, tris[i].p[2].y, tris[i].p[2].z);
 334                                                 self->cur_triangles[self->cur_num_triangles+i] = tris[i];
 335                                         }
 336                                         self->cur_num_triangles += n;
 337                                         //g_debug(" ");
 338                                 }
 339                         }
 340                 }
 341                 break; // Exit after first volume (reflectivity)
 342         }
 343 #endif
 344
 345         /* Load the first sweep by default */
 346         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
 347                 g_warning("No sweeps found\n");
 348         } else {
 349                 /* load first available sweep */
 350                 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
 351                         if (radar->v[vi]== NULL) continue;
 352                         for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
 353                                 if (radar->v[vi]->sweep[si]== NULL) continue;
 354                                 load_colormap(self, radar->v[vi]->h.type_str);
 355                                 load_sweep(self, radar->v[vi]->sweep[si]);
 356                                 break;
 357                         }
 358                         break;
 359                 }
 360         }
 361
 362         load_radar_gui(self, radar);
 363 }
 364
 365 /*****************
 366  * ASync helpers *
 367  *****************/
 368 typedef struct {
 369         GisPluginRadar *self;
 370         gchar *radar_file;
 371 } decompressed_t;
 372
 373 static void decompressed_cb(GPid pid, gint status, gpointer _udata)
 374 {
 375         g_debug("GisPluginRadar: decompressed_cb");
 376         decompressed_t *udata = _udata;
 377         if (status != 0) {
 378                 g_warning("wsr88ddec exited with status %d", status);
 379                 return;
 380         }
 381         load_radar(udata->self, udata->radar_file);
 382         g_spawn_close_pid(pid);
 383         g_free(udata->radar_file);
 384         g_free(udata);
 385 }
 386
 387 static void cache_chunk_cb(char *path, goffset cur, goffset total, gpointer _self)
 388 {
 389         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 390         double percent = (double)cur/total;
 391
 392         g_message("GisPluginRadar: cache_chunk_cb - %lld/%lld = %.2f%%",
 393                         cur, total, percent*100);
 394
 395         gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(self->progress_bar), MIN(percent, 1.0));
 396
 397         gchar *msg = g_strdup_printf("Loading radar... %5.1f%% (%.2f/%.2f MB)",
 398                         percent*100, (double)cur/1000000, (double)total/1000000);
 399         gtk_label_set_text(GTK_LABEL(self->progress_label), msg);
 400         g_free(msg);
 401 }
 402
 403 static void cache_done_cb(char *path, gboolean updated, gpointer _self)
 404 {
 405         g_debug("GisPluginRadar: cache_done_cb - updated = %d", updated);
 406         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 407         char *decompressed = g_strconcat(path, ".raw", NULL);
 408         if (!updated && g_file_test(decompressed, G_FILE_TEST_EXISTS)) {
 409                 load_radar(self, decompressed);
 410                 return;
 411         }
 412
 413         decompressed_t *udata = g_malloc(sizeof(decompressed_t));
 414         udata->self       = self;
 415         udata->radar_file = decompressed;
 416         g_debug("GisPluginRadar: cache_done_cb - File updated, decompressing..");
 417         char *argv[] = {"wsr88ddec", path, decompressed, NULL};
 418         GPid pid;
 419         GError *error = NULL;
 420         g_spawn_async(
 421                 NULL,    // const gchar *working_directory,
 422                 argv,    // gchar **argv,
 423                 NULL,    // gchar **envp,
 424                 G_SPAWN_SEARCH_PATH|
 425                 G_SPAWN_DO_NOT_REAP_CHILD,
 426                          // GSpawnFlags flags,
 427                 NULL,    // GSpawnChildSetupFunc child_setup,
 428                 NULL,    // gpointer user_data,
 429                 &pid,    // GPid *child_pid,
 430                 &error); // GError **error
 431         if (error) {
 432                 g_warning("failed to decompress WSR88D data: %s",
 433                                 error->message);
 434                 g_error_free(error);
 435         }
 436         g_child_watch_add(pid, decompressed_cb, udata);
 437         self->soup = NULL;
 438 }
 439
 440 /*************
 441  * Callbacks *
 442  *************/
 443 static void on_sweep_clicked(GtkRadioButton *button, gpointer _self)
 444 {
 445         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 446         load_colormap(self, g_object_get_data(G_OBJECT(button), "type" ));
 447         load_sweep   (self, g_object_get_data(G_OBJECT(button), "sweep"));
 448 }
 449
 450 static void on_time_changed(GisView *view, const char *time, gpointer _self)
 451 {
 452         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 453         g_debug("GisPluginRadar: on_time_changed - setting time=%s", time);
 454         // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
 455         char *site = gis_view_get_site(view);
 456         char *path = g_strdup_printf("nexrd2/raw/%s/%s_%s", site, site, time);
 457
 458         /* Set up progress bar */
 459         GtkWidget *child = gtk_bin_get_child(GTK_BIN(self->config_body));
 460         if (child) gtk_widget_destroy(child);
 461
 462         GtkWidget *vbox = gtk_vbox_new(FALSE, 10);
 463         gtk_container_set_border_width(GTK_CONTAINER(vbox), 10);
 464         self->progress_bar   = gtk_progress_bar_new();
 465         self->progress_label = gtk_label_new("Loading radar...");
 466         gtk_box_pack_start(GTK_BOX(vbox), self->progress_bar,   FALSE, FALSE, 0);
 467         gtk_box_pack_start(GTK_BOX(vbox), self->progress_label, FALSE, FALSE, 0);
 468         gtk_container_add(GTK_CONTAINER(self->config_body), vbox);
 469         gtk_widget_show_all(self->config_body);
 470
 471         /* Clear radar */
 472         if (self->cur_radar)
 473                 RSL_free_radar(self->cur_radar);
 474         self->cur_radar = NULL;
 475         self->cur_sweep = NULL;
 476         gis_opengl_redraw(self->opengl);
 477
 478         /* Start loading the new radar */
 479         if (self->soup) {
 480                 soup_session_abort(self->soup);
 481                 self->soup = NULL;
 482         }
 483         gchar *base = gis_prefs_get_string(self->prefs, "general/nexrad_url");
 484         if (gis_world_get_offline(self->world))
 485                 self->soup = cache_file(base, path, AWEATHER_ONCE,
 486                                 cache_chunk_cb, cache_done_cb, self);
 487         else
 488                 self->soup = cache_file(base, path, AWEATHER_UPDATE,
 489                                 cache_chunk_cb, cache_done_cb, self);
 490         g_free(path);
 491 }
 492
 493 /***********
 494  * Methods *
 495  ***********/
 496 GisPluginRadar *gis_plugin_radar_new(GisWorld *world, GisView *view, GisOpenGL *opengl, GisPrefs *prefs)
 497 {
 498         /* TODO: move to constructor if possible */
 499         g_debug("GisPluginRadar: new");
 500         GisPluginRadar *self = g_object_new(GIS_TYPE_PLUGIN_RADAR, NULL);
 501         self->world  = world;
 502         self->view   = view;
 503         self->opengl = opengl;
 504         self->prefs  = prefs;
 505
 506         self->config_body = gtk_alignment_new(0, 0, 1, 1);
 507         gtk_container_set_border_width(GTK_CONTAINER(self->config_body), 5);
 508         gtk_container_add(GTK_CONTAINER(self->config_body), gtk_label_new("No radar loaded"));
 509
 510         /* Set up OpenGL Stuff */
 511         g_signal_connect(view,  "time-changed", G_CALLBACK(on_time_changed), self);
 512
 513         return self;
 514 }
 515
 516 static GtkWidget *gis_plugin_radar_get_config(GisPlugin *_self)
 517 {
 518         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 519         return self->config_body;
 520 }
 521
 522 static void gis_plugin_radar_expose(GisPlugin *_self)
 523 {
 524         GisPluginRadar *self = GIS_PLUGIN_RADAR(_self);
 525         g_debug("GisPluginRadar: expose");
 526         if (self->cur_sweep == NULL)
 527                 return;
 528         Sweep *sweep = self->cur_sweep;
 529
 530 #ifdef MARCHING
 531         /* Draw the surface */
 532         glMatrixMode(GL_MODELVIEW);
 533         glPushMatrix();
 534         glDisable(GL_TEXTURE_2D);
 535         float light_ambient[]  = {0.1f, 0.1f, 0.0f};
 536         float light_diffuse[]  = {0.9f, 0.9f, 0.9f};
 537         float light_position[] = {-300000.0f, 500000.0f, 400000.0f, 1.0f};
 538         glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
 539         glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
 540         glLightfv(GL_LIGHT0, GL_POSITION, light_position);
 541         glEnable(GL_LIGHT0);
 542         glEnable(GL_LIGHTING);
 543         glEnable(GL_COLOR_MATERIAL);
 544         glColor4f(1,1,1,0.75);
 545         g_debug("ntri=%d", self->cur_num_triangles);
 546         glBegin(GL_TRIANGLES);
 547         for (int i = 0; i < self->cur_num_triangles; i++) {
 548                 TRIANGLE t = self->cur_triangles[i];
 549                 do_normal(t.p[0].x, t.p[0].y, t.p[0].z,
 550                           t.p[1].x, t.p[1].y, t.p[1].z,
 551                           t.p[2].x, t.p[2].y, t.p[2].z);
 552                 glVertex3f(t.p[0].x, t.p[0].y, t.p[0].z);
 553                 glVertex3f(t.p[1].x, t.p[1].y, t.p[1].z);
 554                 glVertex3f(t.p[2].x, t.p[2].y, t.p[2].z);
 555         }
 556         glEnd();
 557         glPopMatrix();
 558 #endif
 559
 560         /* Draw the rays */
 561         glDisable(GL_LIGHTING);
 562         glDisable(GL_COLOR_MATERIAL);
 563         glMatrixMode(GL_MODELVIEW);
 564         glPushMatrix();
 565         glBindTexture(GL_TEXTURE_2D, self->cur_sweep_tex);
 566         glEnable(GL_TEXTURE_2D);
 567         glDisable(GL_ALPHA_TEST);
 568         glColor4f(1,1,1,1);
 569         glBegin(GL_QUAD_STRIP);
 570         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 571                 Ray  *ray = NULL;
 572                 double angle = 0;
 573                 if (ri < sweep->h.nrays) {
 574                         ray = sweep->ray[ri];
 575                         angle = d2r(ray->h.azimuth - ((double)ray->h.beam_width/2.));
 576                 } else {
 577                         /* Do the right side of the last sweep */
 578                         ray = sweep->ray[ri-1];
 579                         angle = d2r(ray->h.azimuth + ((double)ray->h.beam_width/2.));
 580                 }
 581
 582                 double lx = sin(angle);
 583                 double ly = cos(angle);
 584
 585                 double near_dist = ray->h.range_bin1;
 586                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 587
 588                 /* (find middle of bin) / scale for opengl */
 589                 // near left
 590                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays-0.01);
 591                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 592
 593                 // far  left
 594                 // todo: correct range-height function
 595                 double height = sin(d2r(ray->h.elev)) * far_dist;
 596                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays-0.01);
 597                 glVertex3f(lx*far_dist,  ly*far_dist, height);
 598         }
 599         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 600         glEnd();
 601         glPopMatrix();
 602
 603         /* Texture debug */
 604         //glBegin(GL_QUADS);
 605         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 606         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 607         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 608         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 609         //glEnd();
 610
 611         /* Print the color table */
 612         glDisable(GL_TEXTURE_2D);
 613         glDisable(GL_DEPTH_TEST);
 614         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 615         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 616         glBegin(GL_QUADS);
 617         int i;
 618         for (i = 0; i < 256; i++) {
 619                 glColor4ub(self->cur_colormap->data[i][0],
 620                            self->cur_colormap->data[i][1],
 621                            self->cur_colormap->data[i][2],
 622                            self->cur_colormap->data[i][3]);
 623                 glVertex3f(-1.0, (float)((i  ) - 256/2)/(256/2), 0.0); // bot left
 624                 glVertex3f(-1.0, (float)((i+1) - 256/2)/(256/2), 0.0); // top left
 625                 glVertex3f(-0.9, (float)((i+1) - 256/2)/(256/2), 0.0); // top right
 626                 glVertex3f(-0.9, (float)((i  ) - 256/2)/(256/2), 0.0); // bot right
 627         }
 628         glEnd();
 629         glEnable(GL_DEPTH_TEST);
 630         glEnable(GL_ALPHA_TEST);
 631         glMatrixMode(GL_PROJECTION); glPopMatrix();
 632         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 633 }