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Color tank pressure plot based on relative sac

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Linus suggested that instead of using absolute SAC values to base the
color on (which forced us to pre-define which SAC rates are green and
which are red) we should color the tank pressure plot relative to the avg
SAC rate of that dive - which I think makes the coloring much more useful
to spot when on your dive you were doing well and when you were not.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2011-11-18 09:57:49 -02:00
parent 4cff1f5b90
commit 47a0e0e4be
1 changed files with 26 additions and 24 deletions
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50
profile.c
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@ -595,36 +595,38 @@ static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_
return pi->maxpressure != 0;
}
/* set the color for the pressure plot according to temporary sac rate */
static void set_sac_color(struct graphics_context *gc, double sac)
/* set the color for the pressure plot according to temporary sac rate
* as compared to avg_sac */
static void set_sac_color(struct graphics_context *gc, int sac, int avg_sac)
{
if (sac < 9)
set_source_rgba(gc, 0.0, 0.4, 0.2, 0.80);
else if (sac < 11)
set_source_rgba(gc, 0.2, 0.6, 0.2, 0.80);
else if (sac < 13)
set_source_rgba(gc, 0.4, 0.8, 0.2, 0.80);
else if (sac < 15)
set_source_rgba(gc, 0.6, 0.8, 0.2, 0.80);
else if (sac < 17)
set_source_rgba(gc, 0.8, 0.8, 0.2, 0.80);
else if (sac < 19)
set_source_rgba(gc, 0.8, 0.6, 0.2, 0.80);
else if (sac < 21)
set_source_rgba(gc, 0.8, 0.4, 0.2, 0.80);
else if (sac < 23)
set_source_rgba(gc, 0.9, 0.3, 0.2, 0.80);
int delta = sac - avg_sac;
if (delta < -6000)
set_source_rgb(gc, 0.0, 0.4, 0.2);
else if (delta < -4000)
set_source_rgb(gc, 0.2, 0.6, 0.2);
else if (delta < -2000)
set_source_rgb(gc, 0.4, 0.8, 0.2);
else if (delta < 0)
set_source_rgb(gc, 0.6, 0.8, 0.2);
else if (delta < 2000)
set_source_rgb(gc, 0.8, 0.8, 0.2);
else if (delta < 4000)
set_source_rgb(gc, 0.8, 0.6, 0.2);
else if (delta < 6000)
set_source_rgb(gc, 0.8, 0.4, 0.2);
else if (delta < 8000)
set_source_rgb(gc, 0.9, 0.3, 0.2);
else
set_source_rgba(gc, 1.0, 0.2, 0.2, 0.80);
set_source_rgb(gc, 1.0, 0.2, 0.2);
}
/* calculate the current SAC in l/min */
#define GET_LOCAL_SAC(_entry1, _entry2, _dive) \
/* calculate the current SAC in ml/min and convert to int */
#define GET_LOCAL_SAC(_entry1, _entry2, _dive) (int) \
((GET_PRESSURE((_entry1)) - GET_PRESSURE((_entry2))) * \
(_dive)->cylinder[(_entry1)->cylinderindex].type.size.mliter / \
(((_entry2)->sec - (_entry1)->sec) / 60.0) / \
(1 + ((_entry1)->depth + (_entry2)->depth) / 20000.0) / \
1000000.0)
1000.0)
#define SAC_WINDOW 45 /* sliding window in seconds for current SAC calculation */
@ -635,7 +637,7 @@ static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info
int last = -1;
int lift_pen = FALSE;
int first_plot = TRUE;
double sac = 0.0;
int sac = 0;
struct plot_data *last_entry = NULL;
if (!get_cylinder_pressure_range(gc, pi))
@ -672,7 +674,7 @@ static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info
last++;
last_entry = pi->entry + last;
}
set_sac_color(gc, sac);
set_sac_color(gc, sac, dive->sac);
if (lift_pen) {
if (!first_plot && entry->same_cylinder) {
/* if we have a previous event from the same tank,