Pileus Git - aweather/blob - src/plugins/level2.c

   1 /*
   2  * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <config.h>
  19 #include <math.h>
  20 #include <GL/gl.h>
  21 #include <glib/gstdio.h>
  22 #include <gis.h>
  23 #include <rsl.h>
  24
  25 #include "level2.h"
  26
  27
  28 /**************************
  29  * Data loading functions *
  30  **************************/
  31 /* Convert a sweep to an 2d array of data points */
  32 static void _bscan_sweep(Sweep *sweep, AWeatherColormap *colormap,
  33                 guint8 **data, int *width, int *height)
  34 {
  35         g_debug("AWeatherLevel2: _bscan_sweep - %p, %p, %p",
  36                         sweep, colormap, data);
  37         /* Calculate max number of bins */
  38         int max_bins = 0;
  39         for (int 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         for (int ri = 0; ri < sweep->h.nrays; ri++) {
  47                 Ray *ray  = sweep->ray[ri];
  48                 for (int bi = 0; bi < ray->h.nbins; bi++) {
  49                         /* copy RGBA into buffer */
  50                         //guint val   = dz_f(ray->range[bi]);
  51                         guint8 val   = (guint8)ray->h.f(ray->range[bi]);
  52                         guint  buf_i = (ri*max_bins+bi)*4;
  53                         buf[buf_i+0] = colormap->data[val][0];
  54                         buf[buf_i+1] = colormap->data[val][1];
  55                         buf[buf_i+2] = colormap->data[val][2];
  56                         buf[buf_i+3] = colormap->data[val][3]*0.75; // TESTING
  57                         if (val == BADVAL     || val == RFVAL      || val == APFLAG ||
  58                             val == NOTFOUND_H || val == NOTFOUND_V || val == NOECHO) {
  59                                 buf[buf_i+3] = 0x00; // transparent
  60                         }
  61                 }
  62         }
  63
  64         /* set output */
  65         *width  = max_bins;
  66         *height = sweep->h.nrays;
  67         *data   = buf;
  68 }
  69
  70 /* Load a sweep into an OpenGL texture */
  71 static void _load_sweep_gl(Sweep *sweep, AWeatherColormap *colormap, guint *tex)
  72 {
  73         g_debug("AWeatherLevel2: _load_sweep_gl");
  74         int height, width;
  75         guint8 *data;
  76         _bscan_sweep(sweep, colormap, &data, &width, &height);
  77         glGenTextures(1, tex);
  78         glBindTexture(GL_TEXTURE_2D, *tex);
  79         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  80         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  81         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  82         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  83         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0,
  84                         GL_RGBA, GL_UNSIGNED_BYTE, data);
  85         g_free(data);
  86 }
  87
  88 /* Decompress a radar file using wsr88dec */
  89 static gboolean _decompress_radar(const gchar *file, const gchar *raw)
  90 {
  91         g_debug("AWeatherLevel2: _decompress_radar - \n\t%s\n\t%s", file, raw);
  92         char *argv[] = {"wsr88ddec", (gchar*)file, (gchar*)raw, NULL};
  93         gint status;
  94         GError *error = NULL;
  95         g_spawn_sync(
  96                 NULL,    // const gchar *working_directory
  97                 argv,    // gchar **argv
  98                 NULL,    // gchar **envp
  99                 G_SPAWN_SEARCH_PATH, // GSpawnFlags flags
 100                 NULL,    // GSpawnChildSetupFunc child_setup
 101                 NULL,    // gpointer user_data
 102                 NULL,    // gchar *standard_output
 103                 NULL,    // gchar *standard_output
 104                 &status, // gint *exit_status
 105                 &error); // GError **error
 106         if (error) {
 107                 g_warning("AWeatherLevel2: _decompress_radar - %s", error->message);
 108                 g_error_free(error);
 109                 return FALSE;
 110         }
 111         if (status != 0) {
 112                 gchar *msg = g_strdup_printf("wsr88ddec exited with status %d", status);
 113                 g_warning("AWeatherLevel2: _decompress_radar - %s", msg);
 114                 g_free(msg);
 115                 return FALSE;
 116         }
 117         return TRUE;
 118 }
 119
 120
 121 /*********************
 122  * Drawing functions *
 123  *********************/
 124 static gpointer _draw_radar(GisCallback *_self, gpointer _viewer)
 125 {
 126         AWeatherLevel2 *self = AWEATHER_LEVEL2(_self);
 127         if (!self->sweep || !self->sweep_tex)
 128                 return NULL;
 129
 130         /* Draw wsr88d */
 131         Sweep *sweep = self->sweep;
 132         Radar_header *h = &self->radar->h;
 133         gdouble lat  = (double)h->latd + (double)h->latm/60 + (double)h->lats/(60*60);
 134         gdouble lon  = (double)h->lond + (double)h->lonm/60 + (double)h->lons/(60*60);
 135         gdouble elev = h->height;
 136         gis_viewer_center_position(self->viewer, lat, lon, elev);
 137
 138         glDisable(GL_ALPHA_TEST);
 139         glDisable(GL_CULL_FACE);
 140         glDisable(GL_LIGHTING);
 141         glEnable(GL_TEXTURE_2D);
 142         glEnable(GL_POLYGON_OFFSET_FILL);
 143         glPolygonOffset(1.0, -2.0);
 144         glColor4f(1,1,1,1);
 145
 146         /* Draw the rays */
 147         glBindTexture(GL_TEXTURE_2D, self->sweep_tex);
 148         g_message("Tex = %d", self->sweep_tex);
 149         glBegin(GL_TRIANGLE_STRIP);
 150         for (int ri = 0; ri <= sweep->h.nrays; ri++) {
 151                 Ray  *ray = NULL;
 152                 double angle = 0;
 153                 if (ri < sweep->h.nrays) {
 154                         ray = sweep->ray[ri];
 155                         angle = deg2rad(ray->h.azimuth - ((double)ray->h.beam_width/2.));
 156                 } else {
 157                         /* Do the right side of the last sweep */
 158                         ray = sweep->ray[ri-1];
 159                         angle = deg2rad(ray->h.azimuth + ((double)ray->h.beam_width/2.));
 160                 }
 161
 162                 double lx = sin(angle);
 163                 double ly = cos(angle);
 164
 165                 double near_dist = ray->h.range_bin1;
 166                 double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
 167
 168                 /* (find middle of bin) / scale for opengl */
 169                 // near left
 170                 glTexCoord2f(0.0, (double)ri/sweep->h.nrays-0.01);
 171                 glVertex3f(lx*near_dist, ly*near_dist, 2.0);
 172
 173                 // far  left
 174                 // todo: correct range-height function
 175                 double height = sin(deg2rad(ray->h.elev)) * far_dist;
 176                 glTexCoord2f(1.0, (double)ri/sweep->h.nrays-0.01);
 177                 glVertex3f(lx*far_dist,  ly*far_dist, height);
 178         }
 179         glEnd();
 180         //g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 181
 182         /* Texture debug */
 183         //glBegin(GL_QUADS);
 184         //glTexCoord2d( 0.,  0.); glVertex3f(-500.,   0., 0.); // bot left
 185         //glTexCoord2d( 0.,  1.); glVertex3f(-500., 500., 0.); // top left
 186         //glTexCoord2d( 1.,  1.); glVertex3f( 0.,   500., 3.); // top right
 187         //glTexCoord2d( 1.,  0.); glVertex3f( 0.,     0., 3.); // bot right
 188         //glEnd();
 189
 190         return NULL;
 191 }
 192
 193
 194 /***********
 195  * Methods *
 196  ***********/
 197 static gboolean _set_sweep_cb(gpointer _self)
 198 {
 199         g_debug("AWeatherLevel2: _set_sweep_cb");
 200         AWeatherLevel2 *self = _self;
 201         if (self->sweep_tex)
 202                 glDeleteTextures(1, &self->sweep_tex);
 203         _load_sweep_gl(self->sweep, self->sweep_colors, &self->sweep_tex);
 204         gtk_widget_queue_draw(GTK_WIDGET(self->viewer));
 205         return FALSE;
 206 }
 207 void aweather_level2_set_sweep(AWeatherLevel2 *self,
 208                 int type, float elev)
 209 {
 210         g_debug("AWeatherLevel2: set_sweep - %d %f", type, elev);
 211
 212         /* Find sweep */
 213         Volume *volume = RSL_get_volume(self->radar, type);
 214         if (!volume) return;
 215         self->sweep = RSL_get_closest_sweep(volume, elev, 90);
 216         if (!self->sweep) return;
 217
 218         /* Find colormap */
 219         self->sweep_colors = NULL;
 220         for (int i = 0; self->colormap[i].name; i++)
 221                 if (self->colormap[i].type == type)
 222                         self->sweep_colors = &self->colormap[i];
 223         if (!self->sweep_colors) return;
 224
 225         /* Load data */
 226         g_idle_add(_set_sweep_cb, self);
 227 }
 228
 229 AWeatherLevel2 *aweather_level2_new(GisViewer *viewer,
 230                 AWeatherColormap *colormap, Radar *radar)
 231 {
 232         g_debug("AWeatherLevel2: new");
 233         AWeatherLevel2 *self = g_object_new(AWEATHER_TYPE_LEVEL2, NULL);
 234         self->viewer   = viewer;
 235         self->radar    = radar;
 236         self->colormap = colormap;
 237         aweather_level2_set_sweep(self, DZ_INDEX, 0);
 238         return self;
 239 }
 240
 241 AWeatherLevel2 *aweather_level2_new_from_file(GisViewer *viewer,
 242                 AWeatherColormap *colormap,
 243                 const gchar *file, const gchar *site)
 244 {
 245         g_debug("AWeatherLevel2: new_from_file %s %s", site, file);
 246
 247         /* Decompress radar */
 248         gchar *raw = g_strconcat(file, ".raw", NULL);
 249         if (g_file_test(raw, G_FILE_TEST_EXISTS)) {
 250                 struct stat files, raws;
 251                 g_stat(file, &files);
 252                 g_stat(raw,  &raws);
 253                 if (files.st_mtime < raws.st_mtime)
 254                         if (!_decompress_radar(file, raw))
 255                                 return NULL;
 256         } else {
 257                 if (!_decompress_radar(file, raw))
 258                         return NULL;
 259         }
 260
 261         /* Load the radar file */
 262         RSL_read_these_sweeps("all", NULL);
 263         Radar *radar = RSL_wsr88d_to_radar(raw, (gchar*)site);
 264         g_free(raw);
 265         if (!radar)
 266                 return NULL;
 267
 268         return aweather_level2_new(viewer, colormaps, radar);
 269 }
 270
 271
 272 /****************
 273  * GObject code *
 274  ****************/
 275 G_DEFINE_TYPE(AWeatherLevel2, aweather_level2, GIS_TYPE_CALLBACK);
 276 static void aweather_level2_init(AWeatherLevel2 *self)
 277 {
 278         GIS_CALLBACK(self)->callback  = _draw_radar;
 279         GIS_CALLBACK(self)->user_data = self;
 280 }
 281
 282 static void aweather_level2_class_init(AWeatherLevel2Class *klass)
 283 {
 284 }
 285