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

   1 #include <config.h>
   2 #include <gtk/gtk.h>
   3 #include <gtk/gtkgl.h>
   4 #include <gdk/gdkkeysyms.h>
   5 #include <GL/gl.h>
   6 #include <math.h>
   7
   8 #include "rsl.h"
   9
  10 #include "radar.h"
  11
  12 GtkWidget *drawing;
  13 static Sweep *cur_sweep; // make this not global
  14 static int nred, ngreen, nblue;
  15 static guint8 red[256], green[256], blue[256];
  16
  17 /* Convert a sweep to an 2d array of data points */
  18 static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
  19 {
  20         /* Calculate max number of bins */
  21         int i, max_bins = 0;
  22         for (i = 0; i < sweep->h.nrays; i++)
  23                 max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
  24
  25         /* Allocate buffer using max number of bins for each ray */
  26         char *buf = g_malloc0(sweep->h.nrays * max_bins * 3);
  27
  28         /* Fill the data */
  29         int ri, bi;
  30         for (ri = 0; ri < sweep->h.nrays; ri++) {
  31                 Ray   *ray  = sweep->ray[ri];
  32                 for (bi = 0; bi < ray->h.nbins; bi++) {
  33                         Range bin = ray->range[bi];
  34                         /* copy RGB into buffer */
  35                         buf[(ri*max_bins+bi)*3+0] =   red[(guint8)ray->h.f(bin)];
  36                         buf[(ri*max_bins+bi)*3+1] = green[(guint8)ray->h.f(bin)];
  37                         buf[(ri*max_bins+bi)*3+2] =  blue[(guint8)ray->h.f(bin)];
  38                 }
  39         }
  40
  41         /* set output */
  42         *width  = max_bins;
  43         *height = sweep->h.nrays;
  44         *data   = buf;
  45
  46         /* debug */
  47         static int fi = 0;
  48         char fname[128];
  49         sprintf(fname, "image-%d.ppm", fi);
  50         FILE *fp = fopen(fname, "w+");
  51         fprintf(fp, "P6\n");
  52         fprintf(fp, "# Foo\n");
  53         fprintf(fp, "%d %d\n", *width, *height);
  54         fprintf(fp, "255\n");
  55         fwrite(buf, 3, *width * *height, fp);
  56         fclose(fp);
  57         fi++;
  58 }
  59
  60 /* Load a sweep as the active texture */
  61 static void load_sweep(Sweep *sweep)
  62 {
  63         cur_sweep = sweep;
  64         int height, width;
  65         guint8 *data;
  66         bscan_sweep(sweep, &data, &width, &height);
  67         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  68         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  69         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  70         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
  71         free(data);
  72         glEnable(GL_TEXTURE_2D);
  73         gdk_window_invalidate_rect(drawing->window, &drawing->allocation, FALSE);
  74 }
  75
  76 /* Load the default sweep */
  77 static gboolean configure(GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
  78 {
  79         GdkGLContext *glcontext = gtk_widget_get_gl_context(da);
  80         GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(da);
  81
  82         if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
  83                 g_assert_not_reached();
  84
  85         /* Load the texture */
  86         load_sweep(cur_sweep);
  87
  88         gdk_gl_drawable_gl_end(gldrawable);
  89
  90         return FALSE;
  91 }
  92
  93 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
  94 {
  95         Sweep *sweep = cur_sweep;
  96
  97         GdkGLContext *glcontext = gtk_widget_get_gl_context(da);
  98         GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(da);
  99
 100         /* draw in here */
 101         glPushMatrix();
 102         glRotatef(0, 0, 0, 0);
 103
 104         /* Draw the rays */
 105         glEnable(GL_TEXTURE_2D);
 106         glBegin(GL_QUAD_STRIP);
 107         int _ri; // not really used, creates strange fragments..
 108         for (_ri = 0; _ri < sweep->h.nrays; _ri++) {
 109                 /* Do the first sweep twice to complete the last Quad */
 110                 int ri = _ri % sweep->h.nrays;
 111                 Ray *ray = sweep->ray[ri];
 112
 113                 /* right and left looking out from radar */
 114                 double left  = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 115                 double right = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0;
 116
 117                 double lx = sin(left);
 118                 double ly = cos(left);
 119
 120                 /* TODO: change this to meters instead of 0..1 */
 121                 double max_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 122                 double near_dist = (double)(ray->h.range_bin1) / max_dist;
 123                 double far_dist  = (double)(ray->h.nbins*ray->h.gate_size + ray->h.range_bin1) / max_dist;
 124
 125                 /* (find middle of bin) / scale for opengl */
 126                 glTexCoord2d(0.0, ((double)ri)/sweep->h.nrays); glVertex3f(lx*near_dist, ly*near_dist, 0.); // near left
 127                 glTexCoord2d(0.7, ((double)ri)/sweep->h.nrays); glVertex3f(lx*far_dist,  ly*far_dist,  0.); // far  left
 128         }
 129         g_printf("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 130         glEnd();
 131         /* Texture debug */
 132         //glBegin(GL_QUADS);
 133         //glTexCoord2d( 0.,  0.); glVertex3f(-1.,  0., 0.); // bot left
 134         //glTexCoord2d( 0.,  1.); glVertex3f(-1.,  1., 0.); // top left
 135         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,  1., 0.); // top right
 136         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,  0., 0.); // bot right
 137         //glEnd();
 138         glDisable(GL_TEXTURE_2D);
 139
 140         /* Print the color table */
 141         glBegin(GL_QUADS);
 142         int i;
 143         for (i = 0; i < nred; i++) {
 144                 glColor3ub(red[i], green[i], blue[i]);
 145                 glVertex3f(-1., (float)((i  ) - nred/2)/(nred/2), 0.); // bot left
 146                 glVertex3f(-1., (float)((i+1) - nred/2)/(nred/2), 0.); // top left
 147                 glVertex3f(-.9, (float)((i+1) - nred/2)/(nred/2), 0.); // top right
 148                 glVertex3f(-.9, (float)((i  ) - nred/2)/(nred/2), 0.); // bot right
 149         }
 150         glEnd();
 151
 152         glPopMatrix();
 153
 154         return FALSE;
 155 }
 156
 157 gboolean radar_init(GtkDrawingArea *_drawing, GtkNotebook *config)
 158 {
 159         drawing = GTK_WIDGET(_drawing);
 160         /* Set up OpenGL Stuff */
 161         g_signal_connect(drawing, "expose-event",    G_CALLBACK(expose),    NULL);
 162         g_signal_connect(drawing, "configure-event", G_CALLBACK(configure), NULL);
 163
 164         /* Parse hard coded file.. */
 165         RSL_read_these_sweeps("all", NULL);
 166         //RSL_read_these_sweeps("all", NULL);
 167         Radar *radar = RSL_wsr88d_to_radar("/scratch/aweather/src/KABR_20080609_0224", "KABR");
 168         //radar = RSL_wsr88d_to_radar("/scratch/aweather/src/KABX_20080622_2229", "KABX");
 169         RSL_load_refl_color_table();
 170         RSL_get_color_table(RSL_RED_TABLE,   red,   &nred);
 171         RSL_get_color_table(RSL_GREEN_TABLE, green, &ngreen);
 172         RSL_get_color_table(RSL_BLUE_TABLE,  blue,  &nblue);
 173         if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1)
 174                 g_print("No sweeps found\n");
 175         cur_sweep = radar->v[0]->sweep[6];
 176
 177         /* Add configuration tab */
 178         GtkWidget *hbox = gtk_hbox_new(TRUE, 0);
 179         GtkWidget *button = NULL;
 180         int vi = 0, si = 0;
 181         for (vi = 0; vi < radar->h.nvolumes; vi++) {
 182                 Volume *vol = radar->v[vi];
 183                 if (vol == NULL) continue;
 184                 GtkWidget *vbox = gtk_vbox_new(TRUE, 0);
 185                 gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
 186                 for (si = 0; si < vol->h.nsweeps; si++) {
 187                         Sweep *sweep = vol->sweep[si];
 188                         if (sweep == NULL) continue;
 189                         char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
 190                         button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
 191                         g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
 192                         gtk_box_pack_start(GTK_BOX(vbox), button, TRUE, TRUE, 0);
 193                         free(label);
 194                 }
 195         }
 196         GtkWidget *label = gtk_label_new("Radar");
 197         gtk_notebook_append_page(GTK_NOTEBOOK(config), hbox, label);
 198
 199 }