2 * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
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.
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.
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/>.
20 #include <gtk/gtkgl.h>
26 #include "aweather-gui.h"
27 #include "plugin-radar.h"
31 GtkWidget *config_body;
32 static Sweep *cur_sweep = NULL; // make this not global
33 static int nred, ngreen, nblue;
34 static char red[256], green[256], blue[256];
35 static guint sweep_tex = 0;
37 static AWeatherGui *gui = NULL;
38 static Radar *radar = NULL;
40 /**************************
41 * Data loading functions *
42 **************************/
43 /* return a GL alpha value for a radar pixle */
44 static guint8 get_alpha(guint8 db)
46 if (db == BADVAL) return 0;
47 if (db == RFVAL ) return 0;
48 if (db == APFLAG) return 0;
49 if (db == NOECHO) return 0;
50 if (db == 0 ) return 0;
51 if (db > 60) return 0;
52 else if (db < 10) return 0;
53 else if (db < 25) return (db-10)*(255.0/15);
57 /* Convert a sweep to an 2d array of data points */
58 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
60 /* Calculate max number of bins */
62 for (i = 0; i < sweep->h.nrays; i++)
63 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
65 /* Allocate buffer using max number of bins for each ray */
66 guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
70 for (ri = 0; ri < sweep->h.nrays; ri++) {
71 Ray *ray = sweep->ray[ri];
72 for (bi = 0; bi < ray->h.nbins; bi++) {
73 /* copy RGBA into buffer */
74 //guint val = dz_f(ray->range[bi]);
75 guint val = ray->h.f(ray->range[bi]);
76 guint buf_i = (ri*max_bins+bi)*4;
77 buf[buf_i+0] = red[val];
78 buf[buf_i+1] = green[val];
79 buf[buf_i+2] = blue[val];
80 buf[buf_i+3] = get_alpha(val);
86 *height = sweep->h.nrays;
90 /* Load a sweep as the active texture */
91 static void load_sweep(Sweep *sweep)
93 aweather_gui_gl_begin(gui);
97 bscan_sweep(sweep, &data, &width, &height);
98 glGenTextures(1, &sweep_tex);
99 glBindTexture(GL_TEXTURE_2D, sweep_tex);
100 glPixelStorei(GL_PACK_ALIGNMENT, 1);
101 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
102 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
103 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
104 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
106 gdk_window_invalidate_rect(drawing->window, &drawing->allocation, FALSE);
107 gdk_window_process_updates(drawing->window, FALSE);
108 aweather_gui_gl_end(gui);
111 /* Add selectors to the config area for the sweeps */
112 static void load_radar_gui(Radar *radar)
114 /* Clear existing items */
115 GtkWidget *child = gtk_bin_get_child(GTK_BIN(config_body));
117 gtk_widget_destroy(child);
119 GtkWidget *hbox = gtk_hbox_new(TRUE, 0);
120 GtkWidget *button = NULL;
122 for (vi = 0; vi < radar->h.nvolumes; vi++) {
123 Volume *vol = radar->v[vi];
124 if (vol == NULL) continue;
125 GtkWidget *vbox = gtk_vbox_new(TRUE, 0);
126 for (si = vol->h.nsweeps-1; si >= 0; si--) {
127 Sweep *sweep = vol->sweep[si];
128 if (sweep == NULL) continue;
129 char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
130 button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
131 g_object_set(button, "draw-indicator", FALSE, NULL);
132 g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
133 gtk_box_pack_start(GTK_BOX(vbox), button, FALSE, TRUE, 0);
136 gtk_box_set_homogeneous(GTK_BOX(vbox), FALSE);
137 gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
139 gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(config_body), hbox);
140 gtk_widget_show_all(hbox);
143 /* Load a radar from a file */
144 static void load_radar_rsl(GPid pid, gint status, gpointer _path)
148 g_warning("wsr88ddec exited with status %d", status);
151 char *site = g_path_get_basename(g_path_get_dirname(path));
152 if (radar) RSL_free_radar(radar);
153 RSL_read_these_sweeps("all", NULL);
154 radar = RSL_wsr88d_to_radar(path, site);
156 g_warning("fail to load radar: path=%s, site=%s", path, site);
160 /* TODO: replace this with a better color table */
161 g_message("loading color table");
162 RSL_load_refl_color_table();
163 RSL_get_color_table(RSL_RED_TABLE, red, &nred);
164 RSL_get_color_table(RSL_GREEN_TABLE, green, &ngreen);
165 RSL_get_color_table(RSL_BLUE_TABLE, blue, &nblue);
167 /* Load the first sweep by default */
168 if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
169 g_warning("No sweeps found\n");
171 /* load first available sweep */
172 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
173 if (radar->v[vi]== NULL) continue;
174 for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
175 if (radar->v[vi]->sweep[si]== NULL) continue;
176 load_sweep(radar->v[vi]->sweep[si]);
183 load_radar_gui(radar);
186 /* decompress a radar file, then chain to the actuall loading function */
187 static void load_radar(char *path, gpointer user_data)
189 char *raw = g_strconcat(path, ".raw", NULL);
190 if (g_file_test(raw, G_FILE_TEST_EXISTS)) {
191 load_radar_rsl(0, 0, raw);
193 char *argv[] = {"wsr88ddec", path, raw, NULL};
195 GError *error = NULL;
197 NULL, // const gchar *working_directory,
198 argv, // gchar **argv,
199 NULL, // gchar **envp,
201 G_SPAWN_DO_NOT_REAP_CHILD,
202 // GSpawnFlags flags,
203 NULL, // GSpawnChildSetupFunc child_setup,
204 NULL, // gpointer user_data,
205 &pid, // GPid *child_pid,
206 &error); // GError **error
208 g_warning("failed to decompress WSR88D data: %s", error->message);
209 g_child_watch_add(pid, load_radar_rsl, raw);
216 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
218 g_message("radar:expose");
219 if (cur_sweep == NULL)
221 Sweep *sweep = cur_sweep;
225 glMatrixMode(GL_MODELVIEW);
227 glBindTexture(GL_TEXTURE_2D, sweep_tex);
228 glEnable(GL_TEXTURE_2D);
229 glDisable(GL_ALPHA_TEST);
231 glBegin(GL_QUAD_STRIP);
232 for (int ri = 0; ri <= sweep->h.nrays+1; ri++) {
233 /* Do the first sweep twice to complete the last Quad */
234 Ray *ray = sweep->ray[ri % sweep->h.nrays];
236 /* right and left looking out from radar */
237 double left = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
238 //double right = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
240 double lx = sin(left);
241 double ly = cos(left);
243 double near_dist = ray->h.range_bin1;
244 double far_dist = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
246 /* (find middle of bin) / scale for opengl */
248 glTexCoord2f(0.0, (double)ri/sweep->h.nrays);
249 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
252 glTexCoord2f(1.0, (double)ri/sweep->h.nrays);
253 glVertex3f(lx*far_dist, ly*far_dist, 2.0);
255 //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
261 //glTexCoord2d( 0., 0.); glVertex3f(-1., 0., 0.); // bot left
262 //glTexCoord2d( 0., 1.); glVertex3f(-1., 1., 0.); // top left
263 //glTexCoord2d( 1., 1.); glVertex3f( 0., 1., 0.); // top right
264 //glTexCoord2d( 1., 0.); glVertex3f( 0., 0., 0.); // bot right
267 /* Print the color table */
268 glDisable(GL_TEXTURE_2D);
269 glDisable(GL_DEPTH_TEST);
270 glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
271 glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
274 for (i = 0; i < nred; i++) {
275 glColor4ub(red[i], green[i], blue[i], get_alpha(i));
276 glVertex3f(-1.0, (float)((i ) - nred/2)/(nred/2), 0.0); // bot left
277 glVertex3f(-1.0, (float)((i+1) - nred/2)/(nred/2), 0.0); // top left
278 glVertex3f(-0.9, (float)((i+1) - nred/2)/(nred/2), 0.0); // top right
279 glVertex3f(-0.9, (float)((i ) - nred/2)/(nred/2), 0.0); // bot right
282 glEnable(GL_DEPTH_TEST);
283 glEnable(GL_ALPHA_TEST);
284 glMatrixMode(GL_PROJECTION); glPopMatrix();
285 glMatrixMode(GL_MODELVIEW ); glPopMatrix();
289 static void set_time(AWeatherView *view, char *time, gpointer user_data)
291 g_message("radar:setting time");
292 // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
293 char *site = aweather_view_get_location(view);
294 char *base = "http://mesonet.agron.iastate.edu/data/";
295 char *path = g_strdup_printf("nexrd2/raw/K%s/K%s_%s", site, site, time);
296 //g_message("caching %s/%s", base, path);
297 cache_file(base, path, load_radar, NULL);
300 static void set_site(AWeatherView *view, char *site, gpointer user_data)
302 g_message("Loading wsr88d list for %s", site);
305 GError *error = NULL;
306 char *list_uri = g_strdup_printf("http://mesonet.agron.iastate.edu/data/nexrd2/raw/K%s/dir.list", site);
307 GFile *list = g_file_new_for_uri(list_uri);
308 g_file_load_contents(list, NULL, &data, &length, NULL, &error);
310 g_warning("Error loading list for %s: %s", site, error->message);
313 gchar **lines = g_strsplit(data, "\n", -1);
314 GtkTreeView *tview = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
315 GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
316 gtk_list_store_clear(lstore);
319 for (int i = 0; lines[i] && lines[i][0]; i++) {
320 // format: `841907 KABR_20090510_0159'
321 //g_message("\tadding %p [%s]", lines[i], lines[i]);
322 char **parts = g_strsplit(lines[i], " ", 2);
325 gtk_list_store_insert(lstore, &iter, 0);
326 gtk_list_store_set(lstore, &iter, 0, time, -1);
329 aweather_view_set_time(view, time);
333 gboolean radar_init(AWeatherGui *_gui)
336 drawing = aweather_gui_get_widget(gui, "drawing");
337 GtkNotebook *config = GTK_NOTEBOOK(aweather_gui_get_widget(gui, "tabs"));
338 AWeatherView *view = aweather_gui_get_view(gui);
340 /* Add configuration tab */
341 config_body = gtk_scrolled_window_new(NULL, NULL);
342 gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(config_body), gtk_label_new("No radar loaded"));
343 gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(config_body), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
344 gtk_notebook_append_page(GTK_NOTEBOOK(config), config_body, gtk_label_new("Radar"));
346 /* Set up OpenGL Stuff */
347 g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
348 g_signal_connect(view, "location-changed", G_CALLBACK(set_site), NULL);
349 g_signal_connect(view, "time-changed", G_CALLBACK(set_time), NULL);