Pileus Git - grits/blob - src/plugin-radar.c

   1 #include <config.h>
   2 #include <gtk/gtk.h>
   3 #include <gtk/gtkgl.h>
   4 #include <GL/gl.h>
   5 #include <math.h>
   6
   7 #include "rsl.h"
   8
   9 #include "aweather-gui.h"
  10 #include "plugin-radar.h"
  11
  12 GtkWidget *drawing;
  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;
  17
  18 static AWeatherGui *gui = NULL;
  19 static Radar *radar = NULL;
  20
  21 static guint8 get_alpha(guint8 db)
  22 {
  23         if (db == BADVAL) return 0;
  24         if (db == RFVAL ) return 0;
  25         if (db == APFLAG) return 0;
  26         if (db == NOECHO) return 0;
  27         if (db == 0     ) return 0;
  28         //if      (db > 60) return 0;
  29         //else if (db < 10) return 0;
  30         //else if (db < 25) return (db-10)*(255.0/15);
  31         else              return 255;
  32 }
  33
  34 /* Convert a sweep to an 2d array of data points */
  35 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
  36 {
  37         /* Calculate max number of bins */
  38         int i, max_bins = 0;
  39         for (i = 0; i < sweep->h.nrays; i++)
  40                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  41
  42         /* Allocate buffer using max number of bins for each ray */
  43         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  44
  45         /* Fill the data */
  46         int ri, bi;
  47         for (ri = 0; ri < sweep->h.nrays; ri++) {
  48                 Ray *ray  = sweep->ray[ri];
  49                 for (bi = 0; bi < ray->h.nbins; bi++) {
  50                         /* copy RGBA into buffer */
  51                         //guint val   = dz_f(ray->range[bi]);
  52                         guint val   = ray->h.f(ray->range[bi]);
  53                         guint buf_i = (ri*max_bins+bi)*4;
  54                         buf[buf_i+0] =   red[val];
  55                         buf[buf_i+1] = green[val];
  56                         buf[buf_i+2] =  blue[val];
  57                         buf[buf_i+3] = get_alpha(val);
  58                 }
  59         }
  60
  61         /* set output */
  62         *width  = max_bins;
  63         *height = sweep->h.nrays;
  64         *data   = buf;
  65 }
  66
  67 /* Load a sweep as the active texture */
  68 static void load_sweep(Sweep *sweep)
  69 {
  70         cur_sweep = sweep;
  71         int height, width;
  72         guint8 *data;
  73         bscan_sweep(sweep, &data, &width, &height);
  74         glGenTextures(1, &sweep_tex);
  75         glBindTexture(GL_TEXTURE_2D, sweep_tex);
  76         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  77         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  78         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  79         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  80         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
  81         g_free(data);
  82         gdk_window_invalidate_rect(drawing->window, &drawing->allocation, FALSE);
  83         gdk_window_process_updates(drawing->window, FALSE);
  84 }
  85
  86 /* Load the default sweep */
  87 static gboolean map(GtkWidget *da, GdkEvent *event, gpointer user_data)
  88 {
  89         g_message("radar:map");
  90         aweather_gui_gl_begin(gui);
  91         Sweep *first = radar->v[0]->sweep[0];
  92         if (cur_sweep == NULL)
  93                 load_sweep(first);
  94         aweather_gui_gl_end(gui);
  95
  96         return FALSE;
  97 }
  98
  99 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
 100 {
 101         g_message("radar:expose");
 102         Sweep *sweep = cur_sweep;
 103
 104         /* Draw the rays */
 105
 106         glMatrixMode(GL_MODELVIEW);
 107         glPushMatrix();
 108         glBindTexture(GL_TEXTURE_2D, sweep_tex);
 109         glEnable(GL_TEXTURE_2D);
 110         glColor4f(1,1,1,1);
 111         glBegin(GL_QUAD_STRIP);
 112         for (int ri = 0; ri <= sweep->h.nrays+1; ri++) {
 113                 /* Do the first sweep twice to complete the last Quad */
 114                 Ray *ray = sweep->ray[ri % sweep->h.nrays];
 115
 116                 /* right and left looking out from radar */
 117                 double left  = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 118                 //double right = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 119
 120                 double lx = sin(left);
 121                 double ly = cos(left);
 122
 123                 double near_dist = ray->h.range_bin1;
 124                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 125
 126                 /* (find middle of bin) / scale for opengl */
 127                 // near left
 128                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays);
 129                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 130
 131                 // far  left
 132                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays);
 133                 glVertex3f(lx*far_dist,  ly*far_dist,  2.0);
 134         }
 135         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 136         glEnd();
 137         glPopMatrix();
 138
 139         /* Texture debug */
 140         //glBegin(GL_QUADS);
 141         //glTexCoord2d( 0.,  0.); glVertex3f(-1.,  0., 0.); // bot left
 142         //glTexCoord2d( 0.,  1.); glVertex3f(-1.,  1., 0.); // top left
 143         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,  1., 0.); // top right
 144         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,  0., 0.); // bot right
 145         //glEnd();
 146
 147         /* Print the color table */
 148         glDisable(GL_TEXTURE_2D);
 149         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 150         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 151         glBegin(GL_QUADS);
 152         int i;
 153         for (i = 0; i < nred; i++) {
 154                 glColor4ub(red[i], green[i], blue[i], get_alpha(i));
 155                 glVertex3f(-1.0, (float)((i  ) - nred/2)/(nred/2), 0.0); // bot left
 156                 glVertex3f(-1.0, (float)((i+1) - nred/2)/(nred/2), 0.0); // top left
 157                 glVertex3f(-0.9, (float)((i+1) - nred/2)/(nred/2), 0.0); // top right
 158                 glVertex3f(-0.9, (float)((i  ) - nred/2)/(nred/2), 0.0); // bot right
 159         }
 160         glEnd();
 161         glMatrixMode(GL_PROJECTION); glPopMatrix();
 162         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 163         return FALSE;
 164 }
 165
 166 //static void set_site(AWeatherView *view, char *site, gpointer user_data)
 167 //{
 168 //      g_message("location changed to %s", site);
 169 //}
 170
 171 gboolean radar_init(AWeatherGui *_gui)
 172 {
 173         gui = _gui;
 174         drawing = GTK_WIDGET(aweather_gui_get_drawing(gui));
 175         GtkNotebook    *config  = aweather_gui_get_tabs(gui);
 176
 177         /* Parse hard coded file.. */
 178         RSL_read_these_sweeps("all", NULL);
 179         //RSL_read_these_sweeps("all", NULL);
 180         radar = RSL_wsr88d_to_radar("/scratch/aweather/data/level2/KNQA_20090501_1925.raw", "KNQA");
 181         RSL_load_refl_color_table();
 182         RSL_get_color_table(RSL_RED_TABLE,   red,   &nred);
 183         RSL_get_color_table(RSL_GREEN_TABLE, green, &ngreen);
 184         RSL_get_color_table(RSL_BLUE_TABLE,  blue,  &nblue);
 185         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1)
 186                 g_print("No sweeps found\n");
 187
 188         /* Add configuration tab */
 189         GtkWidget *scroll = gtk_scrolled_window_new(NULL, NULL);
 190         GtkWidget *hbox = gtk_hbox_new(TRUE, 0);
 191         GtkWidget *button = NULL;
 192         int vi = 0, si = 0;
 193         for (vi = 0; vi < radar->h.nvolumes; vi++) {
 194                 Volume *vol = radar->v[vi];
 195                 if (vol == NULL) continue;
 196                 GtkWidget *vbox = gtk_vbox_new(TRUE, 0);
 197                 gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
 198                 for (si = 0; si < vol->h.nsweeps; si++) {
 199                         Sweep *sweep = vol->sweep[si];
 200                         if (sweep == NULL) continue;
 201                         char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
 202                         button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
 203                         g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
 204                         gtk_box_pack_start(GTK_BOX(vbox), button, TRUE, TRUE, 0);
 205                         g_free(label);
 206                 }
 207         }
 208         GtkWidget *label = gtk_label_new("Radar");
 209         gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(scroll), hbox);
 210         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 211         gtk_notebook_append_page(GTK_NOTEBOOK(config), scroll, label);
 212
 213         /* Set up OpenGL Stuff */
 214         g_signal_connect(drawing, "map-event",    G_CALLBACK(map),    NULL);
 215         g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
 216
 217         return TRUE;
 218 }