X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=profile.c;h=febea80250daf8234226b60a3dce9ff7ad4ddb20;hb=454a45617230274c3fff57ad2f70fb35d7f7142b;hp=5ddc43d30442c2e9f60c1e0824e7237312597046;hpb=c1bed52a777fb8d03e056afddf7879af7b94d157;p=ext%2Fsubsurface.git

diff --git a/profile.c b/profile.c
index 5ddc43d..febea80 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;
 
@@ -25,10 +27,135 @@ static int round_feet_up(int feet)
 	return MAX(90, ROUND_UP(feet+5, 15));
 }
 
+static void plot_text(cairo_t *cr, int xpos, int ypos, 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);
+
+	switch (xpos) {
+	case -1:	/* Left-justify */
+		break;
+	case 0:		/* Center */
+		x -= extents.width/2 + extents.x_bearing;
+		break;
+	case 1:		/* Right-justify */
+		x -= extents.width + extents.x_bearing;
+		break;
+	}
+	switch (ypos) {
+	case -1:	/* Top-justify */
+		break;
+	case 0:		/* Center */
+		y -= extents.height/2 + extents.y_bearing;
+		break;
+	case 1:		/* Bottom-justify */
+		y += extents.height * 1.2;
+		break;
+	}
+
+	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, 1, 0, 0);
+	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
 
-static void plot_profile(struct dive *dive, cairo_t *cr,
+static void plot_depth_text(struct dive *dive, cairo_t *cr,
+	double topx, double topy, 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) {
+		struct sample *sample = dive->sample+i;
+		int sec = sample->time.seconds;
+		int depth = to_feet(sample->depth);
+
+		plot_text(cr, 0, 1, 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 topx, double topy, double maxx, double maxy)
 {
 	double scalex, scaley;
@@ -93,7 +220,7 @@ static void plot_profile(struct dive *dive, cairo_t *cr,
 	cairo_stroke(cr);
 }
 
-static int get_tank_pressure_range(struct dive *dive, double *scalex, double *scaley)
+static int get_cylinder_pressure_range(struct dive *dive, double *scalex, double *scaley)
 {
 	int i;
 	double min, max;
@@ -106,9 +233,12 @@ static int get_tank_pressure_range(struct dive *dive, double *scalex, double *sc
 		struct sample *sample = dive->sample + i;
 		double bar;
 
-		if (!sample->tankpressure.mbar)
+		/* FIXME! We only track cylinder 0 right now */
+		if (sample->cylinderindex)
+			continue;
+		if (!sample->cylinderpressure.mbar)
 			continue;
-		bar = sample->tankpressure.mbar;
+		bar = sample->cylinderpressure.mbar;
 		if (bar < min)
 			min = bar;
 		if (bar > max)
@@ -120,32 +250,81 @@ static int get_tank_pressure_range(struct dive *dive, double *scalex, double *sc
 	return 1;
 }
 
-static void plot_tank_pressure(struct dive *dive, cairo_t *cr,
+static void plot_cylinder_pressure(struct dive *dive, cairo_t *cr,
 	double topx, double topy, double maxx, double maxy)
 {
-	int i;
+	int i, sec = -1;
 	double scalex, scaley;
 
-	if (!get_tank_pressure_range(dive, &scalex, &scaley))
+	if (!get_cylinder_pressure_range(dive, &scalex, &scaley))
 		return;
 
 	cairo_set_source_rgba(cr, 0.2, 1.0, 0.2, 0.80);
 
-	cairo_move_to(cr, SCALE(0, dive->beginning_pressure.mbar));
+	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->tankpressure.mbar;
+		mbar = sample->cylinderpressure.mbar;
 		if (!mbar)
 			continue;
+		sec = sample->time.seconds;
 		cairo_line_to(cr, SCALE(sec, mbar));
 	}
-	cairo_line_to(cr, SCALE(dive->duration.seconds, dive->end_pressure.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 topx, double topy, double maxx, double maxy)
+{
+	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, 1, 0, maxx*0.95, maxy*0.9, "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, 1, 0, maxx*0.95, maxy*0.95, "SAC: %4.2f", sac);
+	}
+}
+
 static void plot(cairo_t *cr, int w, int h, struct dive *dive)
 {
 	double topx, topy, maxx, maxy;
@@ -156,11 +335,17 @@ static void plot(cairo_t *cr, int w, int h, struct dive *dive)
 	maxx = (w - 2*topx);
 	maxy = (h - 2*topy);
 
+	/* Cylinder pressure plot */
+	plot_cylinder_pressure(dive, cr, topx, topy, maxx, maxy);
+
 	/* Depth profile */
-	plot_profile(dive, cr, topx, topy, maxx, maxy);
+	plot_depth_profile(dive, cr, topx, topy, maxx, maxy);
+
+	/* Text on top of all graphs.. */
+	plot_depth_text(dive, cr, topx, topy, maxx, maxy);
 
-	/* Tank pressure plot? */
-	plot_tank_pressure(dive, cr, topx, topy, maxx, maxy);
+	/* And info box in the lower right corner.. */
+	plot_info(dive, cr, topx, topy, maxx, maxy);
 
 	/* Bounding box last */
 	scalex = scaley = 1.0;
@@ -195,17 +380,13 @@ static gboolean expose_event(GtkWidget *widget, GdkEventExpose *event, gpointer
 	return FALSE;
 }
 
-GtkWidget *dive_profile_frame(void)
+GtkWidget *dive_profile_widget(void)
 {
-	GtkWidget *frame;
 	GtkWidget *da;
 
-	frame = gtk_frame_new("Dive profile");
-	gtk_widget_show(frame);
 	da = gtk_drawing_area_new();
 	gtk_widget_set_size_request(da, 450, 350);
 	g_signal_connect(da, "expose_event", G_CALLBACK(expose_event), NULL);
-	gtk_container_add(GTK_CONTAINER(frame), da);
 
-	return frame;
+	return da;
 }