4 #include <gdk/gdkkeysyms.h>
13 static Sweep *cur_sweep = NULL; // make this not global
14 static int nred, ngreen, nblue;
15 static char red[256], green[256], blue[256];
16 static guint sweep_tex = 0;
18 static guint8 get_alpha(guint8 db)
20 if (db == BADVAL) return 0;
21 if (db == RFVAL ) return 0;
22 if (db == APFLAG) return 0;
23 if (db == NOECHO) return 0;
24 if (db == 0 ) return 0;
25 //if (db > 60) return 0;
26 //else if (db < 10) return 0;
27 //else if (db < 25) return (db-10)*(255.0/15);
31 //#ifdef USE_TWO_BYTE_PRECISION
32 //#define F_FACTOR 100.0
33 //#define F_DR_FACTOR 1000.0
34 //#define F_DZ_RANGE_OFFSET 50
36 //#define F_FACTOR 2.0
37 //#define F_DR_FACTOR 10.0
38 //#define F_DZ_RANGE_OFFSET 32
41 //static float dz_f(Range x)
44 // return (((float)x-F_OFFSET)/F_FACTOR - F_DZ_RANGE_OFFSET);
45 // if (x == 0) return BADVAL;
46 // if (x == 1) return RFVAL;
47 // if (x == 2) return APFLAG;
48 // if (x == 3) return NOECHO;
52 /* Convert a sweep to an 2d array of data points */
53 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
55 /* Calculate max number of bins */
57 for (i = 0; i < sweep->h.nrays; i++)
58 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
60 /* Allocate buffer using max number of bins for each ray */
61 guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
65 for (ri = 0; ri < sweep->h.nrays; ri++) {
66 Ray *ray = sweep->ray[ri];
67 for (bi = 0; bi < ray->h.nbins; bi++) {
68 /* copy RGBA into buffer */
69 //guint val = dz_f(ray->range[bi]);
70 guint val = ray->h.f(ray->range[bi]);
71 guint buf_i = (ri*max_bins+bi)*4;
72 buf[buf_i+0] = red[val];
73 buf[buf_i+1] = green[val];
74 buf[buf_i+2] = blue[val];
75 buf[buf_i+3] = get_alpha(val);
81 *height = sweep->h.nrays;
85 /* Load a sweep as the active texture */
86 static void load_sweep(Sweep *sweep)
91 bscan_sweep(sweep, &data, &width, &height);
92 glGenTextures(1, &sweep_tex);
93 glBindTexture(GL_TEXTURE_2D, sweep_tex);
94 glPixelStorei(GL_PACK_ALIGNMENT, 1);
95 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
96 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
97 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
98 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
100 gdk_window_invalidate_rect(drawing->window, &drawing->allocation, FALSE);
103 /* Load the default sweep */
104 static gboolean configure(GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
106 Sweep *first = (Sweep*)user_data;
107 if (cur_sweep == NULL)
112 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
114 //g_message("radar:expose");
115 Sweep *sweep = cur_sweep;
118 glBindTexture(GL_TEXTURE_2D, sweep_tex);
119 glEnable(GL_TEXTURE_2D);
121 glBegin(GL_QUAD_STRIP);
122 int _ri; // not really used, creates strange fragments..
123 for (_ri = 0; _ri < sweep->h.nrays; _ri++) {
124 /* Do the first sweep twice to complete the last Quad */
125 int ri = _ri % sweep->h.nrays;
126 Ray *ray = sweep->ray[ri];
128 /* right and left looking out from radar */
129 double left = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
130 //double right = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
132 double lx = sin(left);
133 double ly = cos(left);
135 double near_dist = ray->h.range_bin1;
136 double far_dist = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
138 /* (find middle of bin) / scale for opengl */
140 glTexCoord2f(0.0, (double)ri/sweep->h.nrays);
141 glVertex3f(lx*near_dist, ly*near_dist, 0.0);
144 glTexCoord2f(1.0, (double)ri/sweep->h.nrays);
145 glVertex3f(lx*far_dist, ly*far_dist, 0.0);
147 //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
152 //glTexCoord2d( 0., 0.); glVertex3f(-1., 0., 0.); // bot left
153 //glTexCoord2d( 0., 1.); glVertex3f(-1., 1., 0.); // top left
154 //glTexCoord2d( 1., 1.); glVertex3f( 0., 1., 0.); // top right
155 //glTexCoord2d( 1., 0.); glVertex3f( 0., 0., 0.); // bot right
158 /* Print the color table */
159 glDisable(GL_TEXTURE_2D);
164 for (i = 0; i < nred; i++) {
165 glColor4ub(red[i], green[i], blue[i], get_alpha(i));
166 glVertex3f(-1., (float)((i ) - nred/2)/(nred/2), 0.); // bot left
167 glVertex3f(-1., (float)((i+1) - nred/2)/(nred/2), 0.); // top left
168 glVertex3f(-.9, (float)((i+1) - nred/2)/(nred/2), 0.); // top right
169 glVertex3f(-.9, (float)((i ) - nred/2)/(nred/2), 0.); // bot right
177 gboolean radar_init(GtkDrawingArea *_drawing, GtkNotebook *config)
179 drawing = GTK_WIDGET(_drawing);
181 /* Parse hard coded file.. */
182 RSL_read_these_sweeps("all", NULL);
183 //RSL_read_these_sweeps("all", NULL);
184 Radar *radar = RSL_wsr88d_to_radar("/scratch/aweather/data/level2/KNQA_20090501_1925.raw", "KNQA");
185 RSL_load_refl_color_table();
186 RSL_get_color_table(RSL_RED_TABLE, red, &nred);
187 RSL_get_color_table(RSL_GREEN_TABLE, green, &ngreen);
188 RSL_get_color_table(RSL_BLUE_TABLE, blue, &nblue);
189 if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1)
190 g_print("No sweeps found\n");
192 /* Add configuration tab */
193 GtkWidget *hbox = gtk_hbox_new(TRUE, 0);
194 GtkWidget *button = NULL;
196 for (vi = 0; vi < radar->h.nvolumes; vi++) {
197 Volume *vol = radar->v[vi];
198 if (vol == NULL) continue;
199 GtkWidget *vbox = gtk_vbox_new(TRUE, 0);
200 gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
201 for (si = 0; si < vol->h.nsweeps; si++) {
202 Sweep *sweep = vol->sweep[si];
203 if (sweep == NULL) continue;
204 char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
205 button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
206 g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
207 gtk_box_pack_start(GTK_BOX(vbox), button, TRUE, TRUE, 0);
211 GtkWidget *label = gtk_label_new("Radar");
212 gtk_notebook_append_page(GTK_NOTEBOOK(config), hbox, label);
214 /* Set up OpenGL Stuff */
215 g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
216 g_signal_connect(drawing, "configure-event", G_CALLBACK(configure), radar->v[0]->sweep[0]);