X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=profile.c;h=705d90cd652e15a59c47fba9c34e07e30d6a46dc;hb=7bbdea19ed0c634b4a990e49be7a2c8936a61818;hp=5c30fbb5e5768a0c34b38c824b7e497eb64be6ba;hpb=5f79a804b925a8ffbcf933bb6fae4f764b518c8e;p=ext%2Fsubsurface.git

diff --git a/profile.c b/profile.c
index 5c30fbb..705d90c 100644
--- a/profile.c
+++ b/profile.c
@@ -1,9 +1,11 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #include <time.h>
 
 #include "dive.h"
 #include "display.h"
+#include "divelist.h"
 
 int selected_dive = 0;
 
@@ -25,11 +27,126 @@ static int round_feet_up(int feet)
 	return MAX(90, ROUND_UP(feet+5, 15));
 }
 
+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];
+	va_list args;
+
+	va_start(args, fmt);
+	vsnprintf(buffer, sizeof(buffer), fmt, args);
+	va_end(args);
+
+	cairo_text_extents(cr, buffer, &extents);
+
+	if (tro->allign == CENTER)
+		x -= extents.width/2 + extents.x_bearing;
+	y += extents.height * 1.2;
+
+	cairo_move_to(cr, x, y);
+	cairo_text_path(cr, buffer);
+	cairo_set_source_rgb(cr, 0, 0, 0);
+	cairo_stroke(cr);
+
+	cairo_move_to(cr, x, y);
+	cairo_set_source_rgb(cr, tro->r, tro->g, tro->b);
+	cairo_show_text(cr, buffer);
+}
+
+/*
+ * Find the next maximum point in a 10-minute window.
+ *
+ * We exit early if we hit "enough" of a depth reversal,
+ * which is roughly 10 feet.
+ */
+static int next_minmax(struct dive *dive, int index, int minmax)
+{
+	const int enough = 3000;
+	int timelimit, depthlimit, result;
+	struct sample *sample = dive->sample + index;
+
+	if (index >= dive->samples)
+		return 0;
+
+	timelimit = 24*60*60;
+	depthlimit = sample->depth.mm;
+	result = 0;
+
+	for (;;) {
+		int time, depth;
+
+		index++;
+		sample++;
+		if (index >= dive->samples)
+			break;
+		time = sample->time.seconds;
+		depth = sample->depth.mm;
+		if (time > timelimit)
+			break;
+
+		if (minmax) {
+			if (depth <= depthlimit) {
+				if (depthlimit - depth > enough)
+					break;
+				continue;
+			}
+		} else {
+			if (depth >= depthlimit) {
+				if (depth - depthlimit > enough)
+					break;
+				continue;
+			}
+		}
+
+		result = index;
+		depthlimit = depth;
+		/* Look up to ten minutes into the future */
+		timelimit = time + 600;
+	}
+	return result;
+}
+
 /* 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_profile(struct dive *dive, cairo_t *cr,
-	double topx, double topy, double maxx, double maxy)
+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);
+
+		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;
@@ -80,11 +197,13 @@ 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);
@@ -93,30 +212,39 @@ static void plot_profile(struct dive *dive, cairo_t *cr,
 	cairo_stroke(cr);
 }
 
-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;
 
 	*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++) {
+		int mbar;
 		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 < min)
+			min = mbar;
+		if (mbar > max)
+			max = mbar;
 	}
+	if (startp)
+		startp->mbar = max;
+	if (endp)
+		endp->mbar = min;
 	if (!max)
 		return 0;
 	*scaley = max * 1.5;
@@ -124,31 +252,129 @@ 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;
+	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);
 
 	cairo_move_to(cr, SCALE(0, dive->cylinder[0].start.mbar));
 	for (i = 1; i < dive->samples; i++) {
-		int sec, mbar;
+		int mbar;
 		struct sample *sample = dive->sample + i;
 
-		sec = sample->time.seconds;
 		mbar = sample->cylinderpressure.mbar;
 		if (!mbar)
 			continue;
-		cairo_line_to(cr, SCALE(sec, mbar));
+		sec = sample->time.seconds;
+		if (sec <= dive->duration.seconds)
+			cairo_line_to(cr, SCALE(sec, mbar));
 	}
-	cairo_line_to(cr, SCALE(dive->duration.seconds, dive->cylinder[0].end.mbar));
+	/*
+	 * We may have "surface time" events, in which case we don't go
+	 * back to dive duration
+	 */
+	if (sec < dive->duration.seconds)
+		cairo_line_to(cr, SCALE(dive->duration.seconds, dive->cylinder[0].end.mbar));
 	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;
+	const char *unit;
+	double airuse;
+
+	airuse = calculate_airuse(dive);
+	if (!airuse)
+		return;
+
+	/* I really need to start addign some unit setting thing */
+	switch (output_units.volume) {
+	case LITER:
+		unit = "l";
+		break;
+	case CUFT:
+		unit = "cuft";
+		airuse /= liters_per_cuft;
+		break;
+	}
+	plot_text(cr, &tro, maxx*0.8, maxy*0.8, "vol: %4.2f %s", airuse, unit);
+	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 %s/min", sac, unit);
+	}
+}
+
+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)) {
+		int start, end;
+		const char *unit = "bar";
+
+		switch (output_units.pressure) {
+		case PASCAL:
+			start = startp.mbar * 100;
+			end = startp.mbar * 100;
+			unit = "pascal";
+			break;
+		case BAR:
+			start = (startp.mbar + 500) / 1000;
+			end = (endp.mbar + 500) / 1000;
+			unit = "bar";
+			break;
+		case PSI:
+			start = to_PSI(startp);
+			end = to_PSI(endp);
+			unit = "psi";
+			break;
+		}
+
+		text_render_options_t tro = {0.2, 1.0, 0.2, LEFT};
+		plot_text(cr, &tro, SCALE(0, startp.mbar), "%d %s", start, unit);
+		plot_text(cr, &tro, SCALE(dive->duration.seconds, endp.mbar),
+			  "%d %s", end, unit);
+	}
+}
+
 static void plot(cairo_t *cr, int w, int h, struct dive *dive)
 {
 	double topx, topy, maxx, maxy;
@@ -158,12 +384,20 @@ 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;