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 static void load_color_table(char *table)
92 /* TODO: replace this with a better color table */
93 g_message("loading color table");
94 if (g_str_equal(table, "Velocity"))
95 RSL_load_vel_color_table();
96 else if (g_str_equal(table, "Spectrum width"))
97 RSL_load_sw_color_table();
99 RSL_load_refl_color_table();
100 RSL_get_color_table(RSL_RED_TABLE, red, &nred);
101 RSL_get_color_table(RSL_GREEN_TABLE, green, &ngreen);
102 RSL_get_color_table(RSL_BLUE_TABLE, blue, &nblue);
105 /* Load a sweep as the active texture */
106 static void load_sweep(Sweep *sweep)
108 aweather_gui_gl_begin(gui);
112 bscan_sweep(sweep, &data, &width, &height);
113 glGenTextures(1, &sweep_tex);
114 glBindTexture(GL_TEXTURE_2D, sweep_tex);
115 glPixelStorei(GL_PACK_ALIGNMENT, 1);
116 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
117 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
118 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
119 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
121 gdk_window_invalidate_rect(drawing->window, &drawing->allocation, FALSE);
122 gdk_window_process_updates(drawing->window, FALSE);
123 aweather_gui_gl_end(gui);
126 /* Add selectors to the config area for the sweeps */
127 static void load_radar_gui(Radar *radar)
129 /* Clear existing items */
130 GtkWidget *child = gtk_bin_get_child(GTK_BIN(config_body));
132 gtk_widget_destroy(child);
134 GtkWidget *hbox = gtk_hbox_new(TRUE, 0);
135 GtkWidget *button = NULL;
137 for (vi = 0; vi < radar->h.nvolumes; vi++) {
138 Volume *vol = radar->v[vi];
139 if (vol == NULL) continue;
140 GtkWidget *vbox = gtk_vbox_new(TRUE, 0);
141 for (si = vol->h.nsweeps-1; si >= 0; si--) {
142 Sweep *sweep = vol->sweep[si];
143 if (sweep == NULL) continue;
144 char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
145 button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
146 g_object_set(button, "draw-indicator", FALSE, NULL);
147 g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_color_table), vol->h.type_str);
148 g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
149 gtk_box_pack_start(GTK_BOX(vbox), button, FALSE, TRUE, 0);
152 gtk_box_set_homogeneous(GTK_BOX(vbox), FALSE);
153 gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
155 gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(config_body), hbox);
156 gtk_widget_show_all(hbox);
159 /* Load a radar from a file */
160 static void load_radar_rsl(GPid pid, gint status, gpointer _path)
164 g_warning("wsr88ddec exited with status %d", status);
167 char *site = g_path_get_basename(g_path_get_dirname(path));
168 if (radar) RSL_free_radar(radar);
169 RSL_read_these_sweeps("all", NULL);
170 radar = RSL_wsr88d_to_radar(path, site);
172 g_warning("fail to load radar: path=%s, site=%s", path, site);
176 /* Load the first sweep by default */
177 if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1) {
178 g_warning("No sweeps found\n");
180 /* load first available sweep */
181 for (int vi = 0; vi < radar->h.nvolumes; vi++) {
182 if (radar->v[vi]== NULL) continue;
183 for (int si = 0; si < radar->v[vi]->h.nsweeps; si++) {
184 if (radar->v[vi]->sweep[si]== NULL) continue;
185 load_color_table(radar->v[vi]->h.type_str);
186 load_sweep(radar->v[vi]->sweep[si]);
193 load_radar_gui(radar);
196 /* decompress a radar file, then chain to the actuall loading function */
197 static void load_radar(char *path, gpointer user_data)
199 char *raw = g_strconcat(path, ".raw", NULL);
200 if (g_file_test(raw, G_FILE_TEST_EXISTS)) {
201 load_radar_rsl(0, 0, raw);
203 char *argv[] = {"wsr88ddec", path, raw, NULL};
205 GError *error = NULL;
207 NULL, // const gchar *working_directory,
208 argv, // gchar **argv,
209 NULL, // gchar **envp,
211 G_SPAWN_DO_NOT_REAP_CHILD,
212 // GSpawnFlags flags,
213 NULL, // GSpawnChildSetupFunc child_setup,
214 NULL, // gpointer user_data,
215 &pid, // GPid *child_pid,
216 &error); // GError **error
218 g_warning("failed to decompress WSR88D data: %s", error->message);
219 g_child_watch_add(pid, load_radar_rsl, raw);
226 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
228 g_message("radar:expose");
229 if (cur_sweep == NULL)
231 Sweep *sweep = cur_sweep;
235 glMatrixMode(GL_MODELVIEW);
237 glBindTexture(GL_TEXTURE_2D, sweep_tex);
238 glEnable(GL_TEXTURE_2D);
239 glDisable(GL_ALPHA_TEST);
241 glBegin(GL_QUAD_STRIP);
242 for (int ri = 0; ri <= sweep->h.nrays+1; ri++) {
243 /* Do the first sweep twice to complete the last Quad */
244 Ray *ray = sweep->ray[ri % sweep->h.nrays];
246 /* right and left looking out from radar */
247 double left = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
248 //double right = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
250 double lx = sin(left);
251 double ly = cos(left);
253 double near_dist = ray->h.range_bin1;
254 double far_dist = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
256 /* (find middle of bin) / scale for opengl */
258 glTexCoord2f(0.0, (double)ri/sweep->h.nrays);
259 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
262 glTexCoord2f(1.0, (double)ri/sweep->h.nrays);
263 glVertex3f(lx*far_dist, ly*far_dist, 2.0);
265 //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
271 //glTexCoord2d( 0., 0.); glVertex3f(-1., 0., 0.); // bot left
272 //glTexCoord2d( 0., 1.); glVertex3f(-1., 1., 0.); // top left
273 //glTexCoord2d( 1., 1.); glVertex3f( 0., 1., 0.); // top right
274 //glTexCoord2d( 1., 0.); glVertex3f( 0., 0., 0.); // bot right
277 /* Print the color table */
278 glDisable(GL_TEXTURE_2D);
279 glDisable(GL_DEPTH_TEST);
280 glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
281 glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
284 for (i = 0; i < nred; i++) {
285 glColor4ub(red[i], green[i], blue[i], get_alpha(i));
286 glVertex3f(-1.0, (float)((i ) - nred/2)/(nred/2), 0.0); // bot left
287 glVertex3f(-1.0, (float)((i+1) - nred/2)/(nred/2), 0.0); // top left
288 glVertex3f(-0.9, (float)((i+1) - nred/2)/(nred/2), 0.0); // top right
289 glVertex3f(-0.9, (float)((i ) - nred/2)/(nred/2), 0.0); // bot right
292 glEnable(GL_DEPTH_TEST);
293 glEnable(GL_ALPHA_TEST);
294 glMatrixMode(GL_PROJECTION); glPopMatrix();
295 glMatrixMode(GL_MODELVIEW ); glPopMatrix();
299 static void set_time(AWeatherView *view, char *time, gpointer user_data)
301 g_message("radar:setting time");
302 // format: http://mesonet.agron.iastate.edu/data/nexrd2/raw/KABR/KABR_20090510_0323
303 char *site = aweather_view_get_location(view);
304 char *base = "http://mesonet.agron.iastate.edu/data/";
305 char *path = g_strdup_printf("nexrd2/raw/K%s/K%s_%s", site, site, time);
306 //g_message("caching %s/%s", base, path);
307 cache_file(base, path, load_radar, NULL);
310 static void set_site(AWeatherView *view, char *site, gpointer user_data)
312 g_message("Loading wsr88d list for %s", site);
315 GError *error = NULL;
316 char *list_uri = g_strdup_printf("http://mesonet.agron.iastate.edu/data/nexrd2/raw/K%s/dir.list", site);
317 GFile *list = g_file_new_for_uri(list_uri);
318 g_file_load_contents(list, NULL, &data, &length, NULL, &error);
320 g_warning("Error loading list for %s: %s", site, error->message);
323 gchar **lines = g_strsplit(data, "\n", -1);
324 GtkTreeView *tview = GTK_TREE_VIEW(aweather_gui_get_widget(gui, "time"));
325 GtkListStore *lstore = GTK_LIST_STORE(gtk_tree_view_get_model(tview));
326 gtk_list_store_clear(lstore);
329 for (int i = 0; lines[i] && lines[i][0]; i++) {
330 // format: `841907 KABR_20090510_0159'
331 //g_message("\tadding %p [%s]", lines[i], lines[i]);
332 char **parts = g_strsplit(lines[i], " ", 2);
335 gtk_list_store_insert(lstore, &iter, 0);
336 gtk_list_store_set(lstore, &iter, 0, time, -1);
339 aweather_view_set_time(view, time);
343 gboolean radar_init(AWeatherGui *_gui)
346 drawing = aweather_gui_get_widget(gui, "drawing");
347 GtkNotebook *config = GTK_NOTEBOOK(aweather_gui_get_widget(gui, "tabs"));
348 AWeatherView *view = aweather_gui_get_view(gui);
350 /* Add configuration tab */
351 config_body = gtk_scrolled_window_new(NULL, NULL);
352 gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(config_body), gtk_label_new("No radar loaded"));
353 gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(config_body), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
354 gtk_notebook_append_page(GTK_NOTEBOOK(config), config_body, gtk_label_new("Radar"));
356 /* Set up OpenGL Stuff */
357 g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
358 g_signal_connect(view, "location-changed", G_CALLBACK(set_site), NULL);
359 g_signal_connect(view, "time-changed", G_CALLBACK(set_time), NULL);