X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=profile.c;h=6ddc23a70a808d1cc4055238e197b7060eb20dcc;hb=75cb94f06789380c161317d17ce73a938a3556b5;hp=52dc82beb84622ed8548c7d9660615009fb127b4;hpb=c0a429457ab9fae5e6995777b869b111ef32be74;p=ext%2Fsubsurface.git

diff --git a/profile.c b/profile.c
index 52dc82b..6ddc23a 100644
--- a/profile.c
+++ b/profile.c
@@ -27,7 +27,13 @@ static int round_feet_up(int feet)
 	return MAX(90, ROUND_UP(feet+5, 15));
 }
 
-static void plot_text(cairo_t *cr, double x, double y, const char *fmt, ...)
+typedef struct {
+	double r,g,b;
+	enum {CENTER,LEFT} allign;
+} text_render_options_t;
+
+static void plot_text(cairo_t *cr, text_render_options_t *tro,
+		      double x, double y, const char *fmt, ...)
 {
 	cairo_text_extents_t extents;
 	char buffer[80];
@@ -39,7 +45,8 @@ static void plot_text(cairo_t *cr, double x, double y, const char *fmt, ...)
 
 	cairo_text_extents(cr, buffer, &extents);
 
-	x -= extents.width/2 + extents.x_bearing;
+	if (tro->allign == CENTER)
+		x -= extents.width/2 + extents.x_bearing;
 	y += extents.height * 1.2;
 
 	cairo_move_to(cr, x, y);
@@ -48,7 +55,7 @@ static void plot_text(cairo_t *cr, double x, double y, const char *fmt, ...)
 	cairo_stroke(cr);
 
 	cairo_move_to(cr, x, y);
-	cairo_set_source_rgb(cr, 1, 0, 0);
+	cairo_set_source_rgb(cr, tro->r, tro->g, tro->b);
 	cairo_show_text(cr, buffer);
 }
 
@@ -106,16 +113,46 @@ static int next_minmax(struct dive *dive, int index, int minmax)
 }
 
 /* Scale to 0,0 -> maxx,maxy */
-#define SCALE(x,y) (x)*maxx/scalex+topx,(y)*maxy/scaley+topy
+#define SCALE(x,y) (x)*maxx/scalex,(y)*maxy/scaley
+
+static void plot_depth_text(struct dive *dive, cairo_t *cr,
+	double maxx, double maxy)
+{
+	double scalex, scaley;
+	int maxtime, maxdepth;
+	int i;
+
+	/* Get plot scaling limits */
+	maxtime = round_seconds_up(dive->duration.seconds);
+	maxdepth = round_feet_up(to_feet(dive->maxdepth));
+
+	scalex = maxtime;
+	scaley = maxdepth;
+
+	cairo_set_font_size(cr, 14);
+	cairo_set_source_rgb(cr, 1, 0.2, 0.2);
+	i = 0;
+	while ((i = next_minmax(dive, i, 1)) != 0) {
+		text_render_options_t tro = {1.0, 0.2, 0.2, CENTER};
+		struct sample *sample = dive->sample+i;
+		int sec = sample->time.seconds;
+		int depth = to_feet(sample->depth);
 
-static void plot_profile(struct dive *dive, cairo_t *cr,
-	double topx, double topy, double maxx, double maxy)
+		plot_text(cr, &tro, SCALE(sec, depth), "%d ft", depth);
+		i = next_minmax(dive, i, 0);
+		if (!i)
+			break;
+	}
+}
+
+static void plot_depth_profile(struct dive *dive, cairo_t *cr,
+	double maxx, double maxy)
 {
 	double scalex, scaley;
 	int begins, sec, depth;
 	int i, samples;
 	struct sample *sample;
-	int maxtime, maxdepth, mindepth;
+	int maxtime, maxdepth;
 
 	samples = dive->samples;
 	if (!samples)
@@ -160,61 +197,53 @@ static void plot_profile(struct dive *dive, cairo_t *cr,
 	for (i = 1; i < dive->samples; i++) {
 		sample++;
 		sec = sample->time.seconds;
-		depth = to_feet(sample->depth);
-		cairo_line_to(cr, SCALE(sec, depth));
+		if (sec <= maxtime) {
+			depth = to_feet(sample->depth);
+			cairo_line_to(cr, SCALE(sec, depth));
+		}
 	}
 	scaley = 1.0;
-	cairo_line_to(cr, SCALE(sec, 0));
+	cairo_line_to(cr, SCALE(MIN(sec,maxtime), 0));
 	cairo_line_to(cr, SCALE(begins, 0));
 	cairo_close_path(cr);
 	cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.20);
 	cairo_fill_preserve(cr);
 	cairo_set_source_rgba(cr, 1, 0.2, 0.2, 0.80);
 	cairo_stroke(cr);
-
-	scalex = maxtime;
-	scaley = maxdepth;
-
-	maxdepth = mindepth = 0;
-	maxtime = 0;
-	cairo_set_font_size(cr, 14);
-	cairo_set_source_rgb(cr, 1, 0.2, 0.2);
-	i = 0;
-	while ((i = next_minmax(dive, i, 1)) != 0) {
-		sample = dive->sample+i;
-		sec = sample->time.seconds;
-		depth = to_feet(sample->depth);
-		plot_text(cr, SCALE(sec, depth), "%d ft", depth);
-		i = next_minmax(dive, i, 0);
-		if (!i)
-			break;
-	}
 }
 
-static int get_cylinder_pressure_range(struct dive *dive, double *scalex, double *scaley)
+/* gets both the actual start and end pressure as well as the scaling factors */
+static int get_cylinder_pressure_range(struct dive *dive, double *scalex, double *scaley,
+				       pressure_t *startp, pressure_t *endp)
 {
 	int i;
-	double min, max;
+	int min, max, mbar;
 
 	*scalex = round_seconds_up(dive->duration.seconds);
 
 	max = 0;
-	min = 5000;
+	min = 5000000;
+	if (startp)
+		startp->mbar = endp->mbar = 0;
+
 	for (i = 0; i < dive->samples; i++) {
 		struct sample *sample = dive->sample + i;
-		double bar;
 
 		/* FIXME! We only track cylinder 0 right now */
 		if (sample->cylinderindex)
 			continue;
-		if (!sample->cylinderpressure.mbar)
+		mbar = sample->cylinderpressure.mbar;
+		if (!mbar)
 			continue;
-		bar = sample->cylinderpressure.mbar;
-		if (bar < min)
-			min = bar;
-		if (bar > max)
-			max = bar;
+		if (mbar && startp && !startp->mbar)
+			startp->mbar = mbar;
+		if (mbar < min)
+			min = mbar;
+		if (mbar > max)
+			max = mbar;
 	}
+	if (endp)
+		endp->mbar = mbar;
 	if (!max)
 		return 0;
 	*scaley = max * 1.5;
@@ -222,12 +251,12 @@ static int get_cylinder_pressure_range(struct dive *dive, double *scalex, double
 }
 
 static void plot_cylinder_pressure(struct dive *dive, cairo_t *cr,
-	double topx, double topy, double maxx, double maxy)
+	double maxx, double maxy)
 {
 	int i, sec = -1;
 	double scalex, scaley;
 
-	if (!get_cylinder_pressure_range(dive, &scalex, &scaley))
+	if (!get_cylinder_pressure_range(dive, &scalex, &scaley, NULL, NULL))
 		return;
 
 	cairo_set_source_rgba(cr, 0.2, 1.0, 0.2, 0.80);
@@ -241,7 +270,8 @@ static void plot_cylinder_pressure(struct dive *dive, cairo_t *cr,
 		if (!mbar)
 			continue;
 		sec = sample->time.seconds;
-		cairo_line_to(cr, SCALE(sec, mbar));
+		if (sec <= dive->duration.seconds)
+			cairo_line_to(cr, SCALE(sec, mbar));
 	}
 	/*
 	 * We may have "surface time" events, in which case we don't go
@@ -252,6 +282,68 @@ static void plot_cylinder_pressure(struct dive *dive, cairo_t *cr,
 	cairo_stroke(cr);
 }
 
+/*
+ * Return air usage (in liters).
+ */
+static double calculate_airuse(struct dive *dive)
+{
+	double airuse = 0;
+	int i;
+
+	for (i = 0; i < MAX_CYLINDERS; i++) {
+		cylinder_t *cyl = dive->cylinder + i;
+		int size = cyl->type.size.mliter;
+		double kilo_atm;
+
+		if (!size)
+			continue;
+
+		kilo_atm = (cyl->start.mbar - cyl->end.mbar) / 1013250.0;
+
+		/* Liters of air at 1 atm == milliliters at 1k atm*/
+		airuse += kilo_atm * size;
+	}
+	return airuse;
+}
+
+static void plot_info(struct dive *dive, cairo_t *cr,
+	double maxx, double maxy)
+{
+	text_render_options_t tro = {0.2, 1.0, 0.2, LEFT};
+	const double liters_per_cuft = 28.317;
+	double airuse;
+
+	airuse = calculate_airuse(dive);
+	if (!airuse)
+		return;
+
+	/* I really need to start addign some unit setting thing */
+	airuse /= liters_per_cuft;
+	plot_text(cr, &tro, maxx*0.8, maxy*0.8, "cuft: %4.2f", airuse);
+	if (dive->duration.seconds) {
+		double pressure = 1 + (dive->meandepth.mm / 10000.0);
+		double sac = airuse / pressure * 60 / dive->duration.seconds;
+		plot_text(cr, &tro, maxx*0.8, maxy*0.85, "SAC: %4.2f", sac);
+	}
+}
+
+static void plot_cylinder_pressure_text(struct dive *dive, cairo_t *cr,
+	double maxx, double maxy)
+{
+	double scalex, scaley;
+	pressure_t startp, endp;
+
+	cairo_set_font_size(cr, 10);
+
+	if (get_cylinder_pressure_range(dive, &scalex, &scaley,
+					&startp, &endp)) {
+		text_render_options_t tro = {0.2, 1.0, 0.2, LEFT};
+		plot_text(cr, &tro, SCALE(0, startp.mbar), "%3.0f bar", startp.mbar/1000.0);
+		plot_text(cr, &tro, SCALE(dive->duration.seconds, endp.mbar),
+			  "%3.0f bar", endp.mbar/1000.0);
+	}
+}
+
 static void plot(cairo_t *cr, int w, int h, struct dive *dive)
 {
 	double topx, topy, maxx, maxy;
@@ -261,12 +353,20 @@ static void plot(cairo_t *cr, int w, int h, struct dive *dive)
 	topy = h / 20.0;
 	maxx = (w - 2*topx);
 	maxy = (h - 2*topy);
+	cairo_translate(cr, topx, topy);
+
+	/* Cylinder pressure plot */
+	plot_cylinder_pressure(dive, cr, maxx, maxy);
 
 	/* Depth profile */
-	plot_profile(dive, cr, topx, topy, maxx, maxy);
+	plot_depth_profile(dive, cr, maxx, maxy);
+
+	/* Text on top of all graphs.. */
+	plot_depth_text(dive, cr, maxx, maxy);
+	plot_cylinder_pressure_text(dive, cr, maxx, maxy);
 
-	/* Cylinder pressure plot? */
-	plot_cylinder_pressure(dive, cr, topx, topy, maxx, maxy);
+	/* And info box in the lower right corner.. */
+	plot_info(dive, cr, maxx, maxy);
 
 	/* Bounding box last */
 	scalex = scaley = 1.0;