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