#define INTERPOLATED_PR 1
#define SENSOR_PRESSURE(_entry) (_entry)->pressure[SENSOR_PR]
#define INTERPOLATED_PRESSURE(_entry) (_entry)->pressure[INTERPOLATED_PR]
+#define GET_PRESSURE(_entry) (SENSOR_PRESSURE(_entry) ? : INTERPOLATED_PRESSURE(_entry))
/* convert velocity to colors */
typedef struct { double r, g, b; } rgb_t;
-static const rgb_t rgb[] = {
+static const rgb_t velocity_color[] = {
[STABLE] = {0.0, 0.4, 0.0},
[SLOW] = {0.4, 0.8, 0.0},
[MODERATE] = {0.8, 0.8, 0.0},
cairo_set_source_rgba(gc->cr, r, g, b, a);
}
+static void set_source_rgb_struct(struct graphics_context *gc, const rgb_t *rgb)
+{
+ set_source_rgba(gc, rgb->r, rgb->g, rgb->b, 1);
+}
+
void set_source_rgb(struct graphics_context *gc, double r, double g, double b)
{
set_source_rgba(gc, r, g, b, 1);
/* we want to draw the segments in different colors
* representing the vertical velocity, so we need to
* chop this into short segments */
- rgb_t color = rgb[entry->velocity];
depth = entry->depth;
- set_source_rgb(gc, color.r, color.g, color.b);
+ set_source_rgb_struct(gc, &velocity_color[entry->velocity]);
move_to(gc, entry[-1].sec, entry[-1].depth);
line_to(gc, sec, depth);
cairo_stroke(cr);
return pi->maxpressure != 0;
}
-static void plot_pressure_helper(struct graphics_context *gc, struct plot_info *pi, int type)
+#define SAC_COLORS 9
+static const rgb_t sac_color[SAC_COLORS] = {
+ { 0.0, 0.4, 0.2},
+ { 0.2, 0.6, 0.2},
+ { 0.4, 0.8, 0.2},
+ { 0.6, 0.8, 0.2},
+ { 0.8, 0.8, 0.2},
+ { 0.8, 0.6, 0.2},
+ { 0.8, 0.4, 0.2},
+ { 0.9, 0.3, 0.2},
+ { 1.0, 0.2, 0.2},
+};
+
+/* set the color for the pressure plot according to temporary sac rate
+ * as compared to avg_sac; the calculation simply maps the delta between
+ * sac and avg_sac to indexes 0 .. (SAC_COLORS - 1) with everything
+ * more than 6000 ml/min below avg_sac mapped to 0 */
+
+static void set_sac_color(struct graphics_context *gc, int sac, int avg_sac)
+{
+ int sac_index = 0;
+ int delta = sac - avg_sac + 7000;
+
+ if (!gc->printer) {
+ sac_index = delta / 2000;
+ if (sac_index < 0)
+ sac_index = 0;
+ if (sac_index > SAC_COLORS - 1)
+ sac_index = SAC_COLORS - 1;
+ set_source_rgb_struct(gc, &sac_color[sac_index]);
+ } else {
+ set_source_rgb(gc, 1.0, 1.0, 1.0);
+ }
+}
+
+/* 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) / \
+ 1000.0)
+
+#define SAC_WINDOW 45 /* sliding window in seconds for current SAC calculation */
+
+static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi,
+ struct dive *dive)
{
int i;
+ int last = -1;
int lift_pen = FALSE;
+ int first_plot = TRUE;
+ int sac = 0;
+ struct plot_data *last_entry = NULL;
+
+ if (!get_cylinder_pressure_range(gc, pi))
+ return;
for (i = 0; i < pi->nr; i++) {
int mbar;
struct plot_data *entry = pi->entry + i;
- mbar = entry->pressure[type];
- if (!entry->same_cylinder)
+ mbar = GET_PRESSURE(entry);
+ if (!entry->same_cylinder) {
lift_pen = TRUE;
+ last_entry = NULL;
+ }
if (!mbar) {
lift_pen = TRUE;
continue;
}
+ if (!last_entry) {
+ last = i;
+ last_entry = entry;
+ sac = GET_LOCAL_SAC(entry, pi->entry + i + 1, dive);
+ } else {
+ int j;
+ sac = 0;
+ for (j = last; j < i; j++)
+ sac += GET_LOCAL_SAC(pi->entry + j, pi->entry + j + 1, dive);
+ sac /= (i - last);
+ if (entry->sec - last_entry->sec >= SAC_WINDOW) {
+ last++;
+ last_entry = pi->entry + last;
+ }
+ }
+ set_sac_color(gc, sac, dive->sac);
if (lift_pen) {
- if (i > 0 && entry->same_cylinder) {
+ if (!first_plot && entry->same_cylinder) {
/* if we have a previous event from the same tank,
- * draw at least a short line .
- * This uses the implementation detail that the
- * type is either 0 or 1 */
+ * draw at least a short line */
int prev_pr;
- prev_pr = (entry-1)->pressure[type] ? : (entry-1)->pressure[1 - type];
+ prev_pr = GET_PRESSURE(entry - 1);
move_to(gc, (entry-1)->sec, prev_pr);
line_to(gc, entry->sec, mbar);
- } else
+ } else {
+ first_plot = FALSE;
move_to(gc, entry->sec, mbar);
+ }
lift_pen = FALSE;
- }
- else
+ } else {
line_to(gc, entry->sec, mbar);
+ }
+ cairo_stroke(gc->cr);
+ move_to(gc, entry->sec, mbar);
}
- cairo_stroke(gc->cr);
-
-}
-
-static void plot_cylinder_pressure(struct graphics_context *gc, struct plot_info *pi)
-{
- if (!get_cylinder_pressure_range(gc, pi))
- return;
-
- /* first plot the pressure readings we have from the dive computer */
- set_source_rgba(gc, 0.2, 1.0, 0.2, 0.80);
- plot_pressure_helper(gc, pi, SENSOR_PR);
-
- /* then, in a different color, the interpolated values */
- set_source_rgba(gc, 1.0, 1.0, 0.2, 0.80);
- plot_pressure_helper(gc, pi, INTERPOLATED_PR);
}
static void plot_pressure_value(struct graphics_context *gc, int mbar, int sec,
plot_text(gc, &tro, sec, mbar, "%d %s", pressure, unit);
}
-#define GET_PRESSURE(_entry) (SENSOR_PRESSURE(_entry) ? : INTERPOLATED_PRESSURE(_entry))
-
static void plot_cylinder_pressure_text(struct graphics_context *gc, struct plot_info *pi)
{
int i;
free(list);
}
+static void dump_pr_track(pr_track_t **track_pr)
+{
+ int cyl;
+ pr_track_t *list;
+
+ for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
+ list = track_pr[cyl];
+ while (list) {
+ printf("cyl%d: start %d end %d t_start %d t_end %d pt %6.3f\n", cyl,
+ list->start, list->end, list->t_start, list->t_end, list->pressure_time);
+ list = list->next;
+ }
+ }
+}
+
static void fill_missing_tank_pressures(struct dive *dive, struct plot_info *pi,
pr_track_t **track_pr)
{
struct plot_data *entry;
int cur_pr[MAX_CYLINDERS];
+ if (0) {
+ /* another great debugging tool */
+ dump_pr_track(track_pr);
+ }
for (cyl = 0; cyl < MAX_CYLINDERS; cyl++) {
cur_pr[cyl] = track_pr[cyl]->start;
}
list = NULL;
continue;
}
- magic = (nlist->end - cur_pr[entry->cylinderindex]) / pt; }
+ magic = (nlist->end - cur_pr[entry->cylinderindex]) / pt;
+ }
if (pt != 0.0) {
double cur_pt = (entry->sec - (entry-1)->sec) *
- (1 + entry->depth / 10000.0);
+ (1 + (entry->depth + (entry-1)->depth) / 20000.0);
INTERPOLATED_PRESSURE(entry) =
- cur_pr[entry->cylinderindex] + cur_pt * magic;
+ cur_pr[entry->cylinderindex] + cur_pt * magic + 0.5;
cur_pr[entry->cylinderindex] = INTERPOLATED_PRESSURE(entry);
} else
INTERPOLATED_PRESSURE(entry) = cur_pr[entry->cylinderindex];
while (ev && ev->time.seconds < sample->time.seconds) {
/* insert two fake plot info structures for the end of
* the old tank and the start of the new tank */
- entry->sec = ev->time.seconds;
- (entry+1)->sec = ev->time.seconds + 1;
+ if (ev->time.seconds == sample->time.seconds - 1) {
+ entry->sec = ev->time.seconds - 1;
+ (entry+1)->sec = ev->time.seconds;
+ } else {
+ entry->sec = ev->time.seconds;
+ (entry+1)->sec = ev->time.seconds + 1;
+ }
/* we need a fake depth - let's interpolate */
if (i) {
entry->depth = sample->depth.mm -
}
/* finally, do the discrete integration to get the SAC rate equivalent */
current->pressure_time += (entry->sec - (entry-1)->sec) *
- (1 + entry->depth / 10000.0);
+ (1 + (entry->depth + (entry-1)->depth) / 20000.0);
missing_pr |= !SENSOR_PRESSURE(entry);
}
/* Temperature profile */
plot_temperature_profile(gc, pi);
- /* Cylinder pressure plot */
- plot_cylinder_pressure(gc, pi);
-
/* Depth profile */
plot_depth_profile(gc, pi);
plot_events(gc, pi, dive);
+ /* Cylinder pressure plot */
+ plot_cylinder_pressure(gc, pi, dive);
+
/* Text on top of all graphs.. */
plot_temperature_text(gc, pi);
plot_depth_text(gc, pi);