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 Radar *radar = NULL;
  19
  20 static guint8 get_alpha(guint8 db)
  21 {
  22         if (db == BADVAL) return 0;
  23         if (db == RFVAL ) return 0;
  24         if (db == APFLAG) return 0;
  25         if (db == NOECHO) return 0;
  26         if (db == 0     ) return 0;
  27         //if      (db > 60) return 0;
  28         //else if (db < 10) return 0;
  29         //else if (db < 25) return (db-10)*(255.0/15);
  30         else              return 255;
  31 }
  32
  33 //#ifdef USE_TWO_BYTE_PRECISION
  34 //#define F_FACTOR 100.0
  35 //#define F_DR_FACTOR 1000.0
  36 //#define F_DZ_RANGE_OFFSET 50
  37 //#else
  38 //#define F_FACTOR 2.0
  39 //#define F_DR_FACTOR 10.0
  40 //#define F_DZ_RANGE_OFFSET 32
  41 //#endif
  42 //#define F_OFFSET 4
  43 //static float dz_f(Range x)
  44 //{
  45 //      if (x >= F_OFFSET)
  46 //              return (((float)x-F_OFFSET)/F_FACTOR - F_DZ_RANGE_OFFSET);
  47 //      if (x == 0) return BADVAL;
  48 //      if (x == 1) return RFVAL;
  49 //      if (x == 2) return APFLAG;
  50 //      if (x == 3) return NOECHO;
  51 //      return BADVAL;
  52 //}
  53
  54 /* Convert a sweep to an 2d array of data points */
  55 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
  56 {
  57         /* Calculate max number of bins */
  58         int i, max_bins = 0;
  59         for (i = 0; i < sweep->h.nrays; i++)
  60                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  61
  62         /* Allocate buffer using max number of bins for each ray */
  63         guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
  64
  65         /* Fill the data */
  66         int ri, bi;
  67         for (ri = 0; ri < sweep->h.nrays; ri++) {
  68                 Ray *ray  = sweep->ray[ri];
  69                 for (bi = 0; bi < ray->h.nbins; bi++) {
  70                         /* copy RGBA into buffer */
  71                         //guint val   = dz_f(ray->range[bi]);
  72                         guint val   = ray->h.f(ray->range[bi]);
  73                         guint buf_i = (ri*max_bins+bi)*4;
  74                         buf[buf_i+0] =   red[val];
  75                         buf[buf_i+1] = green[val];
  76                         buf[buf_i+2] =  blue[val];
  77                         buf[buf_i+3] = get_alpha(val);
  78                 }
  79         }
  80
  81         /* set output */
  82         *width  = max_bins;
  83         *height = sweep->h.nrays;
  84         *data   = buf;
  85 }
  86
  87 /* Load a sweep as the active texture */
  88 static void load_sweep(Sweep *sweep)
  89 {
  90         cur_sweep = sweep;
  91         int height, width;
  92         guint8 *data;
  93         bscan_sweep(sweep, &data, &width, &height);
  94         glGenTextures(1, &sweep_tex);
  95         glBindTexture(GL_TEXTURE_2D, sweep_tex);
  96         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  97         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  98         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  99         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 100         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
 101         g_free(data);
 102         gdk_window_invalidate_rect(drawing->window, &drawing->allocation, FALSE);
 103         gdk_window_process_updates(drawing->window, FALSE);
 104 }
 105
 106 /* Load the default sweep */
 107 static gboolean configure(GtkWidget *da, GdkEventConfigure *event, AWeatherGui *gui)
 108 {
 109         //g_message("radar:configure");
 110         aweather_gui_gl_begin(gui);
 111         Sweep *first = radar->v[0]->sweep[0];
 112         if (cur_sweep == NULL)
 113                 load_sweep(first);
 114         aweather_gui_gl_end(gui);
 115
 116         return FALSE;
 117 }
 118
 119 static gboolean expose(GtkWidget *da, GdkEventExpose *event, AWeatherGui *gui)
 120 {
 121         //g_message("radar:expose");
 122         aweather_gui_gl_begin(gui);
 123         Sweep *sweep = cur_sweep;
 124
 125         /* Draw the rays */
 126
 127         glMatrixMode(GL_MODELVIEW);
 128         glPushMatrix();
 129         glBindTexture(GL_TEXTURE_2D, sweep_tex);
 130         glEnable(GL_TEXTURE_2D);
 131         glColor4f(1,1,1,1);
 132         glBegin(GL_QUAD_STRIP);
 133         for (int ri = 0; ri <= sweep->h.nrays+1; ri++) {
 134                 /* Do the first sweep twice to complete the last Quad */
 135                 Ray *ray = sweep->ray[ri % sweep->h.nrays];
 136
 137                 /* right and left looking out from radar */
 138                 double left  = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 139                 //double right = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 140
 141                 double lx = sin(left);
 142                 double ly = cos(left);
 143
 144                 double near_dist = ray->h.range_bin1;
 145                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 146
 147                 /* (find middle of bin) / scale for opengl */
 148                 // near left
 149                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays);
 150                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 151
 152                 // far  left
 153                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays);
 154                 glVertex3f(lx*far_dist,  ly*far_dist,  2.0);
 155         }
 156         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 157         glEnd();
 158         glPopMatrix();
 159
 160         /* Texture debug */
 161         //glBegin(GL_QUADS);
 162         //glTexCoord2d( 0.,  0.); glVertex3f(-1.,  0., 0.); // bot left
 163         //glTexCoord2d( 0.,  1.); glVertex3f(-1.,  1., 0.); // top left
 164         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,  1., 0.); // top right
 165         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,  0., 0.); // bot right
 166         //glEnd();
 167
 168         /* Print the color table */
 169         glDisable(GL_TEXTURE_2D);
 170         glMatrixMode(GL_MODELVIEW ); glPushMatrix(); glLoadIdentity();
 171         glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity();
 172         glBegin(GL_QUADS);
 173         int i;
 174         for (i = 0; i < nred; i++) {
 175                 glColor4ub(red[i], green[i], blue[i], get_alpha(i));
 176                 glVertex3f(-1.0, (float)((i  ) - nred/2)/(nred/2), 0.0); // bot left
 177                 glVertex3f(-1.0, (float)((i+1) - nred/2)/(nred/2), 0.0); // top left
 178                 glVertex3f(-0.9, (float)((i+1) - nred/2)/(nred/2), 0.0); // top right
 179                 glVertex3f(-0.9, (float)((i  ) - nred/2)/(nred/2), 0.0); // bot right
 180         }
 181         glEnd();
 182         glMatrixMode(GL_PROJECTION); glPopMatrix();
 183         glMatrixMode(GL_MODELVIEW ); glPopMatrix();
 184
 185         aweather_gui_gl_end(gui);
 186         return FALSE;
 187 }
 188
 189 gboolean radar_init(AWeatherGui *gui)
 190 {
 191         drawing = GTK_WIDGET(aweather_gui_get_drawing(gui));
 192         GtkNotebook    *config  = aweather_gui_get_tabs(gui);
 193
 194         /* Parse hard coded file.. */
 195         RSL_read_these_sweeps("all", NULL);
 196         //RSL_read_these_sweeps("all", NULL);
 197         radar = RSL_wsr88d_to_radar("/scratch/aweather/data/level2/KNQA_20090501_1925.raw", "KNQA");
 198         RSL_load_refl_color_table();
 199         RSL_get_color_table(RSL_RED_TABLE,   red,   &nred);
 200         RSL_get_color_table(RSL_GREEN_TABLE, green, &ngreen);
 201         RSL_get_color_table(RSL_BLUE_TABLE,  blue,  &nblue);
 202         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1)
 203                 g_print("No sweeps found\n");
 204
 205         /* Add configuration tab */
 206         GtkWidget *scroll = gtk_scrolled_window_new(NULL, NULL);
 207         GtkWidget *hbox = gtk_hbox_new(TRUE, 0);
 208         GtkWidget *button = NULL;
 209         int vi = 0, si = 0;
 210         for (vi = 0; vi < radar->h.nvolumes; vi++) {
 211                 Volume *vol = radar->v[vi];
 212                 if (vol == NULL) continue;
 213                 GtkWidget *vbox = gtk_vbox_new(TRUE, 0);
 214                 gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
 215                 for (si = 0; si < vol->h.nsweeps; si++) {
 216                         Sweep *sweep = vol->sweep[si];
 217                         if (sweep == NULL) continue;
 218                         char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
 219                         button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
 220                         g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
 221                         gtk_box_pack_start(GTK_BOX(vbox), button, TRUE, TRUE, 0);
 222                         g_free(label);
 223                 }
 224         }
 225         GtkWidget *label = gtk_label_new("Radar");
 226         gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(scroll), hbox);
 227         gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 228         gtk_notebook_append_page(GTK_NOTEBOOK(config), scroll, label);
 229
 230         /* Set up OpenGL Stuff */
 231         g_signal_connect(drawing, "expose-event",    G_CALLBACK(expose),    gui);
 232         g_signal_connect(drawing, "configure-event", G_CALLBACK(configure), gui);
 233
 234         return TRUE;
 235 }