Improved depth info for dives without samples

[ext/subsurface.git] / profile.c

diff --git a/profile.c b/profile.c
index 137ed6f88778c2dea942c2dd377b43dea11497d2..614822809f53dd59bcb6ad2575f51b5e8207e398 100644 (file)
--- a/profile.c
+++ b/profile.c
@@ -1354,12 +1354,15 @@ void plot(struct graphics_context *gc, cairo_rectangle_int_t *drawing_area, stru
        int nr = dive->samples;
 
        if (!nr) {
+               /* The dive has no samples, so create a few fake ones.  This assumes an
+               ascent/descent rate of 9 m/min, which is just below the limit for FAST. */
                int duration = dive->duration.seconds;
                int maxdepth = dive->maxdepth.mm;
+               int asc_desc_time = dive->maxdepth.mm*60/9000;
                sample = fake;
-               fake[1].time.seconds = duration * 0.05;
+               fake[1].time.seconds = asc_desc_time;
                fake[1].depth.mm = maxdepth;
-               fake[2].time.seconds = duration * 0.95;
+               fake[2].time.seconds = duration - asc_desc_time;
                fake[2].depth.mm = maxdepth;
                fake[3].time.seconds = duration * 1.00;
                nr = 4;