X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;ds=sidebyside;f=src%2Fradar.c;h=e7575155f15a23da48be54498716bcbc5c91f05f;hb=4308f69c781166b035bc0d0782fd974a9e1372b6;hp=d31343a01ff5951fe8420dc345b6b909f71a2af6;hpb=bde76a7f3a02f8ce6b5cad6079430d70cffb971d;p=grits

diff --git a/src/radar.c b/src/radar.c
index d31343a..e757515 100644
--- a/src/radar.c
+++ b/src/radar.c
@@ -9,102 +9,211 @@
 
 #include "radar.h"
 
-static GtkWidget *rotate_button;
-static Radar *radar;
-static Sweep *sweep;
+GtkWidget *drawing;
+static Sweep *cur_sweep = NULL;  // make this not global
 static int nred, ngreen, nblue;
-static unsigned char red[256], green[256], blue[256];
+static char red[256], green[256], blue[256];
+static guint sweep_tex = 0;
 
-static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
+static guint8 get_alpha(guint8 db)
 {
-	GdkGLContext *glcontext = gtk_widget_get_gl_context (da);
-	GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable (da);
-
-	/* draw in here */
-	glPushMatrix();
-	
-	glRotatef(0, 0, 0, 0);
+	if (db == BADVAL) return 0;
+	if (db == RFVAL ) return 0;
+	if (db == APFLAG) return 0;
+	if (db == NOECHO) return 0;
+	if (db == 0     ) return 0;
+	//if      (db > 60) return 0;
+	//else if (db < 10) return 0;
+	//else if (db < 25) return (db-10)*(255.0/15);
+	else              return 255;
+}
 
-	glShadeModel(GL_FLAT);
+//#ifdef USE_TWO_BYTE_PRECISION
+//#define F_FACTOR 100.0
+//#define F_DR_FACTOR 1000.0
+//#define F_DZ_RANGE_OFFSET 50
+//#else
+//#define F_FACTOR 2.0
+//#define F_DR_FACTOR 10.0
+//#define F_DZ_RANGE_OFFSET 32
+//#endif
+//#define F_OFFSET 4
+//static float dz_f(Range x)
+//{
+//	if (x >= F_OFFSET)
+//		return (((float)x-F_OFFSET)/F_FACTOR - F_DZ_RANGE_OFFSET);
+//	if (x == 0) return BADVAL;
+//	if (x == 1) return RFVAL;
+//	if (x == 2) return APFLAG;
+//	if (x == 3) return NOECHO;
+//	return BADVAL;
+//}
+
+/* Convert a sweep to an 2d array of data points */
+static void bscan_sweep(Sweep *sweep, guint8 **data, int *width, int *height)
+{
+	/* Calculate max number of bins */
+	int i, max_bins = 0;
+	for (i = 0; i < sweep->h.nrays; i++)
+		max_bins = MAX(max_bins, sweep->ray[i]->h.nbins);
+
+	/* Allocate buffer using max number of bins for each ray */
+	guint8 *buf = g_malloc0(sweep->h.nrays * max_bins * 4);
+
+	/* Fill the data */
+	int ri, bi;
+	for (ri = 0; ri < sweep->h.nrays; ri++) {
+		Ray *ray  = sweep->ray[ri];
+		for (bi = 0; bi < ray->h.nbins; bi++) {
+			/* copy RGBA into buffer */
+			//guint val   = dz_f(ray->range[bi]);
+			guint val   = ray->h.f(ray->range[bi]);
+			guint buf_i = (ri*max_bins+bi)*4;
+			buf[buf_i+0] =   red[val];
+			buf[buf_i+1] = green[val];
+			buf[buf_i+2] =  blue[val];
+			buf[buf_i+3] = get_alpha(val);
+		}
+	}
 
-	glBegin(GL_QUADS);
+	/* set output */
+	*width  = max_bins;
+	*height = sweep->h.nrays;
+	*data   = buf;
+}
 
-	int rayi;
-	for (rayi = 0; rayi < sweep->h.nrays; rayi++) {
-		Ray *ray = sweep->ray[rayi];
-
-		/* right and left with respect to north */
-		double right = ((ray->h.azimuth + ray->h.beam_width)*M_PI)/180.0; 
-		double left  = ((ray->h.azimuth - ray->h.beam_width)*M_PI)/180.0; 
-
-		double rx = sin(right), ry = cos(right);
-		double lx = sin(left),  ly = cos(left);
-
-		int nbins = ray->h.nbins;
-		//int nbins = 20;
-		int max_dist = nbins * ray->h.gate_size + ray->h.range_bin1;
-		int bini, dist = ray->h.range_bin1;
-		for (bini = 0; bini < nbins; bini++, dist += ray->h.gate_size) {
-			if (ray->range[bini] == BADVAL) continue;
-
-			/* (find middle of bin) / scale for opengl */
-			double nd = ((double)dist - ((double)ray->h.gate_size)/2.) / (double)max_dist;
-			double fd = ((double)dist + ((double)ray->h.gate_size)/2.) / (double)max_dist;
-		
-			glColor3ub(
-				  red[(unsigned char)ray->h.f(ray->range[bini])],
-				green[(unsigned char)ray->h.f(ray->range[bini])],
-				 blue[(unsigned char)ray->h.f(ray->range[bini])]
-			);
-
-			glVertex3f(lx*nd, ly*nd, 0.); // near left
-			glVertex3f(lx*fd, ly*fd, 0.); // far  left
-			glVertex3f(rx*fd, ry*fd, 0.); // far  right
-			glVertex3f(rx*nd, ry*nd, 0.); // near right
+/* Load a sweep as the active texture */
+static void load_sweep(Sweep *sweep)
+{
+	cur_sweep = sweep;
+	int height, width;
+	guint8 *data;
+	bscan_sweep(sweep, &data, &width, &height);
+	glGenTextures(1, &sweep_tex);
+	glBindTexture(GL_TEXTURE_2D, sweep_tex);
+	glPixelStorei(GL_PACK_ALIGNMENT, 1);
+	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+	g_free(data);
+	gdk_window_invalidate_rect(drawing->window, &drawing->allocation, FALSE);
+}
 
-		}
+/* Load the default sweep */
+static gboolean configure(GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
+{
+	Sweep *first = (Sweep*)user_data;
+	if (cur_sweep == NULL)
+		load_sweep(first);
+	return FALSE;
+}
 
-		g_print("\n");
+static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
+{
+	//g_message("radar:expose");
+	Sweep *sweep = cur_sweep;
+
+	/* Draw the rays */
+	glBindTexture(GL_TEXTURE_2D, sweep_tex);
+	glEnable(GL_TEXTURE_2D);
+
+	glBegin(GL_QUAD_STRIP);
+	int _ri; // not really used, creates strange fragments..
+	for (_ri = 0; _ri < sweep->h.nrays; _ri++) {
+		/* Do the first sweep twice to complete the last Quad */
+		int ri = _ri % sweep->h.nrays;
+		Ray *ray = sweep->ray[ri];
+
+		/* right and left looking out from radar */
+		double left  = ((ray->h.azimuth - ((double)ray->h.beam_width/2.))*M_PI)/180.0; 
+		//double right = ((ray->h.azimuth + ((double)ray->h.beam_width/2.))*M_PI)/180.0; 
+
+		double lx = sin(left);
+		double ly = cos(left);
+
+		double near_dist = ray->h.range_bin1;
+		double far_dist  = ray->h.nbins*ray->h.gate_size + ray->h.range_bin1;
+
+		/* (find middle of bin) / scale for opengl */
+		// near left
+		glTexCoord2f(0.0, (double)ri/sweep->h.nrays);
+		glVertex3f(lx*near_dist, ly*near_dist, 0.0);
+
+		// far  left
+		glTexCoord2f(1.0, (double)ri/sweep->h.nrays);
+		glVertex3f(lx*far_dist,  ly*far_dist,  0.0);
 	}
-
+	//g_print("ri=%d, nr=%d, bw=%f\n", _ri, sweep->h.nrays, sweep->h.beam_width);
 	glEnd();
 
+	/* Texture debug */
+	//glBegin(GL_QUADS);
+	//glTexCoord2d( 0.,  0.); glVertex3f(-1.,  0., 0.); // bot left
+	//glTexCoord2d( 0.,  1.); glVertex3f(-1.,  1., 0.); // top left
+	//glTexCoord2d( 1.,  1.); glVertex3f( 0.,  1., 0.); // top right
+	//glTexCoord2d( 1.,  0.); glVertex3f( 0.,  0., 0.); // bot right
+	//glEnd();
+
 	/* Print the color table */
+	glDisable(GL_TEXTURE_2D);
+	glPushMatrix();
+	glLoadIdentity();
 	glBegin(GL_QUADS);
 	int i;
 	for (i = 0; i < nred; i++) {
-		glColor3ub(red[i], green[i], blue[i]);
+		glColor4ub(red[i], green[i], blue[i], get_alpha(i));
 		glVertex3f(-1., (float)((i  ) - nred/2)/(nred/2), 0.); // bot left
 		glVertex3f(-1., (float)((i+1) - nred/2)/(nred/2), 0.); // top left
 		glVertex3f(-.9, (float)((i+1) - nred/2)/(nred/2), 0.); // top right
 		glVertex3f(-.9, (float)((i  ) - nred/2)/(nred/2), 0.); // bot right
 	}
 	glEnd();
-	
-	glPopMatrix ();
+	glPopMatrix();
 
 	return FALSE;
 }
 
-gboolean radar_init(GtkDrawingArea *drawing, GtkNotebook *config)
+gboolean radar_init(GtkDrawingArea *_drawing, GtkNotebook *config)
 {
-	/* Add configuration tab */
-	GtkWidget *label = gtk_label_new("Radar");
-	rotate_button = gtk_toggle_button_new_with_label("Rotate");
-	gtk_notebook_append_page(GTK_NOTEBOOK(config), rotate_button, label);
-
-	/* Set up OpenGL Stuff */
-	g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
+	drawing = GTK_WIDGET(_drawing);
 
 	/* Parse hard coded file.. */
-	RSL_read_these_sweeps("0", NULL);
-	radar = RSL_wsr88d_to_radar("/scratch/aweather/src/KABR_20080609_0224", "KABR");
+	RSL_read_these_sweeps("all", NULL);
+	//RSL_read_these_sweeps("all", NULL);
+	Radar *radar = RSL_wsr88d_to_radar("/scratch/aweather/data/level2/KNQA_20090501_1925.raw", "KNQA");
 	RSL_load_refl_color_table();
 	RSL_get_color_table(RSL_RED_TABLE,   red,   &nred);
 	RSL_get_color_table(RSL_GREEN_TABLE, green, &ngreen);
 	RSL_get_color_table(RSL_BLUE_TABLE,  blue,  &nblue);
 	if (radar->h.nvolumes < 1 || radar->v[0]->h.nsweeps < 1)
 		g_print("No sweeps found\n");
-	sweep = radar->v[0]->sweep[0];
-	RSL_volume_to_gif(radar->v[DZ_INDEX], "dz_sweep", 1024, 1024, 200.0);
+
+	/* Add configuration tab */
+	GtkWidget *hbox = gtk_hbox_new(TRUE, 0);
+	GtkWidget *button = NULL;
+	int vi = 0, si = 0;
+	for (vi = 0; vi < radar->h.nvolumes; vi++) {
+		Volume *vol = radar->v[vi];
+		if (vol == NULL) continue;
+		GtkWidget *vbox = gtk_vbox_new(TRUE, 0);
+		gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
+		for (si = 0; si < vol->h.nsweeps; si++) {
+			Sweep *sweep = vol->sweep[si];
+			if (sweep == NULL) continue;
+			char *label = g_strdup_printf("Tilt: %.2f (%s)", sweep->h.elev, vol->h.type_str);
+			button = gtk_radio_button_new_with_label_from_widget(GTK_RADIO_BUTTON(button), label);
+			g_signal_connect_swapped(button, "clicked", G_CALLBACK(load_sweep), sweep);
+			gtk_box_pack_start(GTK_BOX(vbox), button, TRUE, TRUE, 0);
+			g_free(label);
+		}
+	}
+	GtkWidget *label = gtk_label_new("Radar");
+	gtk_notebook_append_page(GTK_NOTEBOOK(config), hbox, label);
+
+	/* Set up OpenGL Stuff */
+	g_signal_connect(drawing, "expose-event",    G_CALLBACK(expose),    NULL);
+	g_signal_connect(drawing, "configure-event", G_CALLBACK(configure), radar->v[0]->sweep[0]);
+
+	return TRUE;
 }