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Tweak the "show depth in text" heuristic a bit

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Use a 10-minute window *or* when the depth has reversed sufficiently to
make the max we've found interesting.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2011-09-06 12:16:39 -07:00
parent 3b67a3ecb4
commit c0a429457a
1 changed files with 21 additions and 7 deletions
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28
profile.c
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@ -52,9 +52,15 @@ static void plot_text(cairo_t *cr, double x, double y, const char *fmt, ...)
cairo_show_text(cr, buffer);
}
/* Find the next maximum point in a 5-minute window */
static int next_minmax(struct dive *dive, int index, int max)
/*
* 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;
@ -76,17 +82,25 @@ static int next_minmax(struct dive *dive, int index, int max)
depth = sample->depth.mm;
if (time > timelimit)
break;
if (max) {
if (depth <= depthlimit)
if (minmax) {
if (depth <= depthlimit) {
if (depthlimit - depth > enough)
break;
continue;
}
} else {
if (depth >= depthlimit)
if (depth >= depthlimit) {
if (depth - depthlimit > enough)
break;
continue;
}
}
depthlimit = depth;
timelimit = time + 300;
result = index;
depthlimit = depth;
/* Look up to ten minutes into the future */
timelimit = time + 600;
}
return result;
}