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planner.c
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planner.c
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/* planner.c
*
* code that allows us to plan future dives
*
* (c) Dirk Hohndel 2013
*/
#include <assert.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include "dive.h"
#include "divelist.h"
#include "planner.h"
#include "gettext.h"
#include "libdivecomputer/parser.h"
#define TIMESTEP 3 /* second */
#define DECOTIMESTEP 60 /* seconds. Unit of deco stop times */
int decostoplevels[] = { 0, 3000, 6000, 9000, 12000, 15000, 18000, 21000, 24000, 27000,
30000, 33000, 36000, 39000, 42000, 45000, 48000, 51000, 54000, 57000,
60000, 63000, 66000, 69000, 72000, 75000, 78000, 81000, 84000, 87000,
90000, 100000, 110000, 120000, 130000, 140000, 150000, 160000, 170000,
180000, 190000, 200000, 220000, 240000, 260000, 280000, 300000,
320000, 340000, 360000, 380000 };
double plangflow, plangfhigh;
bool plan_verbatim = false, plan_display_runtime = true, plan_display_duration = false, plan_display_transitions = false;
const char *disclaimer;
#if DEBUG_PLAN
void dump_plan(struct diveplan *diveplan)
{
struct divedatapoint *dp;
struct tm tm;
if (!diveplan) {
printf("Diveplan NULL\n");
return;
}
utc_mkdate(diveplan->when, &tm);
printf("\nDiveplan @ %04d-%02d-%02d %02d:%02d:%02d (surfpres %dmbar):\n",
tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec,
diveplan->surface_pressure);
dp = diveplan->dp;
while (dp) {
printf("\t%3u:%02u: %dmm gas: %d o2 %d h2\n", FRACTION(dp->time, 60), dp->depth, get_o2(&dp->gasmix), get_he(&dp->gasmix));
dp = dp->next;
}
}
#endif
bool diveplan_empty(struct diveplan *diveplan)
{
struct divedatapoint *dp;
if (!diveplan || !diveplan->dp)
return true;
dp = diveplan->dp;
while (dp) {
if (dp->time)
return false;
dp = dp->next;
}
return true;
}
void set_last_stop(bool last_stop_6m)
{
if (last_stop_6m == true)
decostoplevels[1] = 6000;
else
decostoplevels[1] = 3000;
}
void set_verbatim(bool verbatim)
{
plan_verbatim = verbatim;
}
void set_display_runtime(bool display)
{
plan_display_runtime = display;
}
void set_display_duration(bool display)
{
plan_display_duration = display;
}
void set_display_transitions(bool display)
{
plan_display_transitions = display;
}
/* get the gas at a certain time during the dive */
void get_gas_at_time(struct dive *dive, struct divecomputer *dc, duration_t time, struct gasmix *gas)
{
// we always start with the first gas, so that's our gas
// unless an event tells us otherwise
struct event *event = dc->events;
*gas = dive->cylinder[0].gasmix;
while (event && event->time.seconds <= time.seconds) {
if (!strcmp(event->name, "gaschange")) {
int cylinder_idx = get_cylinder_index(dive, event);
*gas = dive->cylinder[cylinder_idx].gasmix;
}
event = event->next;
}
}
int get_gasidx(struct dive *dive, struct gasmix *mix)
{
int gasidx = -1;
while (++gasidx < MAX_CYLINDERS)
if (gasmix_distance(&dive->cylinder[gasidx].gasmix, mix) < 100)
return gasidx;
return -1;
}
double interpolate_transition(struct dive *dive, duration_t t0, duration_t t1, depth_t d0, depth_t d1, const struct gasmix *gasmix, o2pressure_t po2)
{
int j;
double tissue_tolerance = 0.0;
for (j = t0.seconds; j < t1.seconds; j++) {
int depth = interpolate(d0.mm, d1.mm, j - t0.seconds, t1.seconds - t0.seconds);
tissue_tolerance = add_segment(depth_to_mbar(depth, dive) / 1000.0, gasmix, 1, po2.mbar, dive, prefs.bottomsac);
}
return tissue_tolerance;
}
/* returns the tissue tolerance at the end of this (partial) dive */
double tissue_at_end(struct dive *dive, char **cached_datap)
{
struct divecomputer *dc;
struct sample *sample, *psample;
int i;
depth_t lastdepth = {};
duration_t t0 = {}, t1 = {};
double tissue_tolerance;
struct gasmix gas;
if (!dive)
return 0.0;
if (*cached_datap) {
tissue_tolerance = restore_deco_state(*cached_datap);
} else {
tissue_tolerance = init_decompression(dive);
cache_deco_state(tissue_tolerance, cached_datap);
}
dc = &dive->dc;
if (!dc->samples)
return tissue_tolerance;
psample = sample = dc->sample;
for (i = 0; i < dc->samples; i++, sample++) {
t1 = sample->time;
get_gas_at_time(dive, dc, t0, &gas);
if (i > 0)
lastdepth = psample->depth;
tissue_tolerance = interpolate_transition(dive, t0, t1, lastdepth, sample->depth, &gas, sample->setpoint);
psample = sample;
t0 = t1;
}
return tissue_tolerance;
}
/* if a default cylinder is set, use that */
void fill_default_cylinder(cylinder_t *cyl)
{
const char *cyl_name = prefs.default_cylinder;
struct tank_info_t *ti = tank_info;
pressure_t pO2 = {.mbar = 1600};
if (!cyl_name)
return;
while (ti->name != NULL) {
if (strcmp(ti->name, cyl_name) == 0)
break;
ti++;
}
if (ti->name == NULL)
/* didn't find it */
return;
cyl->type.description = strdup(ti->name);
if (ti->ml) {
cyl->type.size.mliter = ti->ml;
cyl->type.workingpressure.mbar = ti->bar * 1000;
} else {
cyl->type.workingpressure.mbar = psi_to_mbar(ti->psi);
if (ti->psi)
cyl->type.size.mliter = cuft_to_l(ti->cuft) * 1000 / bar_to_atm(psi_to_bar(ti->psi));
}
// MOD of air
cyl->depth = gas_mod(&cyl->gasmix, pO2, 1);
}
/* make sure that the gas we are switching to is represented in our
* list of cylinders */
static int verify_gas_exists(struct gasmix mix_in)
{
int i;
cylinder_t *cyl;
for (i = 0; i < MAX_CYLINDERS; i++) {
cyl = displayed_dive.cylinder + i;
if (cylinder_nodata(cyl))
continue;
if (gasmix_distance(&cyl->gasmix, &mix_in) < 100)
return i;
}
fprintf(stderr, "this gas %s should have been on the cylinder list\nThings will fail now\n", gasname(&mix_in));
return -1;
}
/* calculate the new end pressure of the cylinder, based on its current end pressure and the
* latest segment. */
static void update_cylinder_pressure(struct dive *d, int old_depth, int new_depth, int duration, int sac, cylinder_t *cyl, bool in_deco)
{
volume_t gas_used;
pressure_t delta_p;
depth_t mean_depth;
int factor = 1000;
if (d->dc.divemode == PSCR)
factor = prefs.pscr_ratio;
if (!cyl)
return;
mean_depth.mm = (old_depth + new_depth) / 2;
gas_used.mliter = depth_to_atm(mean_depth.mm, d) * sac / 60 * duration * factor / 1000;
cyl->gas_used.mliter += gas_used.mliter;
if (in_deco)
cyl->deco_gas_used.mliter += gas_used.mliter;
if (cyl->type.size.mliter) {
delta_p.mbar = gas_used.mliter * 1000.0 / cyl->type.size.mliter;
cyl->end.mbar -= delta_p.mbar;
}
}
/* simply overwrite the data in the displayed_dive
* return false if something goes wrong */
static void create_dive_from_plan(struct diveplan *diveplan, bool track_gas)
{
struct divedatapoint *dp;
struct divecomputer *dc;
struct sample *sample;
struct gasmix oldgasmix;
struct event *ev;
cylinder_t *cyl;
int oldpo2 = 0;
int lasttime = 0;
int lastdepth = 0;
enum dive_comp_type type = displayed_dive.dc.divemode;
if (!diveplan || !diveplan->dp)
return;
#if DEBUG_PLAN & 4
printf("in create_dive_from_plan\n");
dump_plan(diveplan);
#endif
displayed_dive.salinity = diveplan->salinity;
// reset the cylinders and clear out the samples and events of the
// displayed dive so we can restart
reset_cylinders(&displayed_dive, track_gas);
dc = &displayed_dive.dc;
dc->when = displayed_dive.when = diveplan->when;
free(dc->sample);
dc->sample = NULL;
dc->samples = 0;
dc->alloc_samples = 0;
while ((ev = dc->events)) {
dc->events = dc->events->next;
free(ev);
}
dp = diveplan->dp;
cyl = &displayed_dive.cylinder[0];
oldgasmix = cyl->gasmix;
sample = prepare_sample(dc);
sample->setpoint.mbar = dp->setpoint;
sample->sac.mliter = prefs.bottomsac;
oldpo2 = dp->setpoint;
if (track_gas && cyl->type.workingpressure.mbar)
sample->cylinderpressure.mbar = cyl->end.mbar;
sample->manually_entered = true;
finish_sample(dc);
while (dp) {
struct gasmix gasmix = dp->gasmix;
int po2 = dp->setpoint;
if (dp->setpoint)
type = CCR;
int time = dp->time;
int depth = dp->depth;
if (time == 0) {
/* special entries that just inform the algorithm about
* additional gases that are available */
if (verify_gas_exists(gasmix) < 0)
goto gas_error_exit;
dp = dp->next;
continue;
}
/* Check for SetPoint change */
if (oldpo2 != po2) {
/* this is a bad idea - we should get a different SAMPLE_EVENT type
* reserved for this in libdivecomputer... overloading SMAPLE_EVENT_PO2
* with a different meaning will only cause confusion elsewhere in the code */
add_event(dc, lasttime, SAMPLE_EVENT_PO2, 0, po2, "SP change");
oldpo2 = po2;
}
/* Make sure we have the new gas, and create a gas change event */
if (gasmix_distance(&gasmix, &oldgasmix) > 0) {
int idx;
if ((idx = verify_gas_exists(gasmix)) < 0)
goto gas_error_exit;
/* need to insert a first sample for the new gas */
add_gas_switch_event(&displayed_dive, dc, lasttime + 1, idx);
cyl = &displayed_dive.cylinder[idx];
sample = prepare_sample(dc);
sample[-1].setpoint.mbar = po2;
sample->time.seconds = lasttime + 1;
sample->depth.mm = lastdepth;
sample->manually_entered = dp->entered;
sample->sac.mliter = dp->entered ? prefs.bottomsac : prefs.decosac;
if (track_gas && cyl->type.workingpressure.mbar)
sample->cylinderpressure.mbar = cyl->sample_end.mbar;
finish_sample(dc);
oldgasmix = gasmix;
}
/* Create sample */
sample = prepare_sample(dc);
/* set po2 at beginning of this segment */
/* and keep it valid for last sample - where it likely doesn't matter */
sample[-1].setpoint.mbar = po2;
sample->setpoint.mbar = po2;
sample->time.seconds = lasttime = time;
sample->depth.mm = lastdepth = depth;
sample->manually_entered = dp->entered;
sample->sac.mliter = dp->entered ? prefs.bottomsac : prefs.decosac;
if (track_gas && !sample[-1].setpoint.mbar) { /* Don't track gas usage for CCR legs of dive */
update_cylinder_pressure(&displayed_dive, sample[-1].depth.mm, depth, time - sample[-1].time.seconds,
dp->entered ? diveplan->bottomsac : diveplan->decosac, cyl, !dp->entered);
if (cyl->type.workingpressure.mbar)
sample->cylinderpressure.mbar = cyl->end.mbar;
}
finish_sample(dc);
dp = dp->next;
}
dc->divemode = type;
#if DEBUG_PLAN & 32
save_dive(stdout, &displayed_dive);
#endif
return;
gas_error_exit:
report_error(translate("gettextFromC", "Too many gas mixes"));
return;
}
void free_dps(struct diveplan *diveplan)
{
if (!diveplan)
return;
struct divedatapoint *dp = diveplan->dp;
while (dp) {
struct divedatapoint *ndp = dp->next;
free(dp);
dp = ndp;
}
diveplan->dp = NULL;
}
struct divedatapoint *create_dp(int time_incr, int depth, struct gasmix gasmix, int po2)
{
struct divedatapoint *dp;
dp = malloc(sizeof(struct divedatapoint));
dp->time = time_incr;
dp->depth = depth;
dp->gasmix = gasmix;
dp->setpoint = po2;
dp->entered = false;
dp->next = NULL;
return dp;
}
void add_to_end_of_diveplan(struct diveplan *diveplan, struct divedatapoint *dp)
{
struct divedatapoint **lastdp = &diveplan->dp;
struct divedatapoint *ldp = *lastdp;
int lasttime = 0;
while (*lastdp) {
ldp = *lastdp;
if (ldp->time > lasttime)
lasttime = ldp->time;
lastdp = &(*lastdp)->next;
}
*lastdp = dp;
if (ldp && dp->time != 0)
dp->time += lasttime;
}
struct divedatapoint *plan_add_segment(struct diveplan *diveplan, int duration, int depth, struct gasmix gasmix, int po2, bool entered)
{
struct divedatapoint *dp = create_dp(duration, depth, gasmix, po2);
dp->entered = entered;
add_to_end_of_diveplan(diveplan, dp);
return (dp);
}
struct gaschanges {
int depth;
int gasidx;
};
static struct gaschanges *analyze_gaslist(struct diveplan *diveplan, int *gaschangenr, int depth, int *asc_cylinder)
{
struct gasmix gas;
int nr = 0;
struct gaschanges *gaschanges = NULL;
struct divedatapoint *dp = diveplan->dp;
int best_depth = displayed_dive.cylinder[*asc_cylinder].depth.mm;
while (dp) {
if (dp->time == 0) {
gas = dp->gasmix;
if (dp->depth <= depth) {
int i = 0;
nr++;
gaschanges = realloc(gaschanges, nr * sizeof(struct gaschanges));
while (i < nr - 1) {
if (dp->depth < gaschanges[i].depth) {
memmove(gaschanges + i + 1, gaschanges + i, (nr - i - 1) * sizeof(struct gaschanges));
break;
}
i++;
}
gaschanges[i].depth = dp->depth;
gaschanges[i].gasidx = get_gasidx(&displayed_dive, &gas);
assert(gaschanges[i].gasidx != -1);
} else {
/* is there a better mix to start deco? */
if (dp->depth < best_depth) {
best_depth = dp->depth;
*asc_cylinder = get_gasidx(&displayed_dive, &gas);
}
}
}
dp = dp->next;
}
*gaschangenr = nr;
#if DEBUG_PLAN & 16
for (nr = 0; nr < *gaschangenr; nr++) {
int idx = gaschanges[nr].gasidx;
printf("gaschange nr %d: @ %5.2lfm gasidx %d (%s)\n", nr, gaschanges[nr].depth / 1000.0,
idx, gasname(&displayed_dive.cylinder[idx].gasmix));
}
#endif
return gaschanges;
}
/* sort all the stops into one ordered list */
static unsigned int *sort_stops(int *dstops, int dnr, struct gaschanges *gstops, int gnr)
{
int i, gi, di;
int total = dnr + gnr;
int *stoplevels = malloc(total * sizeof(int));
/* no gaschanges */
if (gnr == 0) {
memcpy(stoplevels, dstops, dnr * sizeof(int));
return stoplevels;
}
i = total - 1;
gi = gnr - 1;
di = dnr - 1;
while (i >= 0) {
if (dstops[di] > gstops[gi].depth) {
stoplevels[i] = dstops[di];
di--;
} else if (dstops[di] == gstops[gi].depth) {
stoplevels[i] = dstops[di];
di--;
gi--;
} else {
stoplevels[i] = gstops[gi].depth;
gi--;
}
i--;
if (di < 0) {
while (gi >= 0)
stoplevels[i--] = gstops[gi--].depth;
break;
}
if (gi < 0) {
while (di >= 0)
stoplevels[i--] = dstops[di--];
break;
}
}
while (i >= 0)
stoplevels[i--] = 0;
#if DEBUG_PLAN & 16
int k;
for (k = gnr + dnr - 1; k >= 0; k--) {
printf("stoplevel[%d]: %5.2lfm\n", k, stoplevels[k] / 1000.0);
if (stoplevels[k] == 0)
break;
}
#endif
return stoplevels;
}
static void add_plan_to_notes(struct diveplan *diveplan, struct dive *dive, bool show_disclaimer, int error)
{
char buffer[20000], temp[1000];
int len, lastdepth = 0, lasttime = 0, lastsetpoint = -1, newdepth = 0, lastprintdepth = 0;
struct divedatapoint *dp = diveplan->dp;
bool gaschange = !plan_verbatim, postponed = plan_verbatim;
struct divedatapoint *nextdp = NULL;
disclaimer = translate("gettextFromC", "DISCLAIMER / WARNING: THIS IS A NEW IMPLEMENTATION OF THE BUHLMANN "
"ALGORITHM AND A DIVE PLANNER IMPLEMENTATION BASED ON THAT WHICH HAS "
"RECEIVED ONLY A LIMITED AMOUNT OF TESTING. WE STRONGLY RECOMMEND NOT TO "
"PLAN DIVES SIMPLY BASED ON THE RESULTS GIVEN HERE.");
if (!dp)
return;
if (error) {
snprintf(temp, sizeof(temp), "%s",
translate("gettextFromC", "Decompression calculation aborted due to excessive time"));
snprintf(buffer, sizeof(buffer), "<span style='color: red;'>%s </span> %s<br>",
translate("gettextFromC", "Warning:"), temp);
dive->notes = strdup(buffer);
return;
}
len = show_disclaimer ? snprintf(buffer, sizeof(buffer), "<div><b>%s<b></div><br>", disclaimer) : 0;
snprintf(temp, sizeof(temp), translate("gettextFromC", "based on GFlow = %d and GFhigh = %d"),
diveplan->gflow, diveplan->gfhigh);
len += snprintf(buffer + len, sizeof(buffer) - len, "<div><b>%s</b><br>%s</div><br>",
translate("gettextFromC", "Subsurface dive plan"), temp);
if (!plan_verbatim) {
len += snprintf(buffer + len, sizeof(buffer) - len, "<div><table><thead><tr><th>%s</th>",
translate("gettextFromC", "depth"));
if (plan_display_runtime)
len += snprintf(buffer + len, sizeof(buffer) - len, "<th style='padding-left: 10px;'>%s</th>",
translate("gettextFromC", "runtime"));
if (plan_display_duration)
len += snprintf(buffer + len, sizeof(buffer) - len, "<th style='padding-left: 10px;'>%s</th>",
translate("gettextFromC", "duration"));
len += snprintf(buffer + len, sizeof(buffer) - len,
"<th style='padding-left: 10px; float: left;'>%s</th></tr></thead><tbody style='float: left;'>",
translate("gettextFromC", "gas"));
}
do {
struct gasmix gasmix, newgasmix = {};
const char *depth_unit;
double depthvalue;
int decimals;
nextdp = dp->next;
if (dp->time == 0)
continue;
gasmix = dp->gasmix;
depthvalue = get_depth_units(dp->depth, &decimals, &depth_unit);
/* analyze the dive points ahead */
while (nextdp && nextdp->time == 0)
nextdp = nextdp->next;
if (nextdp)
newgasmix = nextdp->gasmix;
/* do we want to skip this leg as it is devoid of anything useful? */
if (!dp->entered &&
gasmix_distance(&gasmix, &newgasmix) == 0 &&
nextdp &&
dp->setpoint == nextdp->setpoint &&
dp->depth != lastdepth &&
nextdp->depth != dp->depth
&& !gaschange)
continue;
if (dp->time - lasttime < 10 && !(gaschange && dp->next && dp->depth != dp->next->depth))
continue;
len = strlen(buffer);
if (nextdp && (gasmix_distance(&gasmix, &newgasmix) || dp->setpoint != nextdp->setpoint))
gaschange = true;
if (plan_verbatim) {
if (dp->depth != lastprintdepth) {
if (plan_display_transitions || dp->entered || !dp->next || (gaschange && dp->next && dp->depth != nextdp->depth)) {
if (dp->setpoint)
snprintf(temp, sizeof(temp), translate("gettextFromC", "Transition to %.*f %s in %d:%02d min - runtime %d:%02u on %s (SP = %.1fbar)"),
decimals, depthvalue, depth_unit,
FRACTION(dp->time - lasttime, 60),
FRACTION(dp->time, 60),
gasname(&gasmix),
(double) dp->setpoint / 1000.0);
else
snprintf(temp, sizeof(temp), translate("gettextFromC", "Transition to %.*f %s in %d:%02d min - runtime %d:%02u on %s"),
decimals, depthvalue, depth_unit,
FRACTION(dp->time - lasttime, 60),
FRACTION(dp->time, 60),
gasname(&gasmix));
len += snprintf(buffer + len, sizeof(buffer) - len, "%s<br>", temp);
}
newdepth = dp->depth;
lasttime = dp->time;
} else {
if (dp->depth != nextdp->depth || gasmix_distance(&gasmix, &newgasmix) != 0 || dp->setpoint != nextdp->setpoint) {
if (dp->setpoint)
snprintf(temp, sizeof(temp), translate("gettextFromC", "Stay at %.*f %s for %d:%02d min - runtime %d:%02u on %s (SP = %.1fbar)"),
decimals, depthvalue, depth_unit,
FRACTION(dp->time - lasttime, 60),
FRACTION(dp->time, 60),
gasname(&gasmix),
(double) dp->setpoint / 1000.0);
else
snprintf(temp, sizeof(temp), translate("gettextFromC", "Stay at %.*f %s for %d:%02d min - runtime %d:%02u on %s"),
decimals, depthvalue, depth_unit,
FRACTION(dp->time - lasttime, 60),
FRACTION(dp->time, 60),
gasname(&gasmix));
len += snprintf(buffer + len, sizeof(buffer) - len, "%s<br>", temp);
newdepth = dp->depth;
lasttime = dp->time;
}
}
} else {
if ((dp->depth == lastdepth && dp->depth != nextdp->depth) || plan_display_transitions || dp->entered || !dp->next || (gaschange && dp->next && dp->depth != nextdp->depth)) {
snprintf(temp, sizeof(temp), translate("gettextFromC", "%3.0f%s"), depthvalue, depth_unit);
len += snprintf(buffer + len, sizeof(buffer) - len, "<tr><td style='padding-left: 10px; float: right;'>%s</td>", temp);
if (plan_display_runtime) {
snprintf(temp, sizeof(temp), translate("gettextFromC", "%3dmin"), (dp->time + 30) / 60);
len += snprintf(buffer + len, sizeof(buffer) - len, "<td style='padding-left: 10px; float: right;'>%s</td>", temp);
}
if (plan_display_duration) {
snprintf(temp, sizeof(temp), translate("gettextFromC", "%3dmin"), (dp->time - lasttime + 30) / 60);
len += snprintf(buffer + len, sizeof(buffer) - len, "<td style='padding-left: 10px; float: right;'>%s</td>", temp);
}
if (gaschange) {
if(dp->depth == lastdepth && !postponed) {
postponed = true;
} else {
if (dp->setpoint) {
snprintf(temp, sizeof(temp), translate("gettextFromC", "(SP = %.1fbar)"), (double) dp->setpoint / 1000.0);
len += snprintf(buffer + len, sizeof(buffer) - len, "<td style='padding-left: 10px; color: red; float: left;'><b>%s %s</b></td>", gasname(&newgasmix),
temp);
} else {
len += snprintf(buffer + len, sizeof(buffer) - len, "<td style='padding-left: 10px; color: red; float: left;'><b>%s</b></td>", gasname(&newgasmix));
}
gaschange = false;
postponed = false;
}
} else {
len += snprintf(buffer + len, sizeof(buffer) - len, "<td> </td>");
}
len += snprintf(buffer + len, sizeof(buffer) - len, "</tr>");
newdepth = dp->depth;
lasttime = dp->time;
}
}
if (gaschange) {
if(dp->depth == lastdepth && !postponed) {
postponed = true;
} else {
// gas switch at this waypoint
if (plan_verbatim) {
if (lastsetpoint >= 0) {
if (nextdp && nextdp->setpoint)
snprintf(temp, sizeof(temp), translate("gettextFromC", "Switch gas to %s (SP = %.1fbar)"), gasname(&newgasmix), (double) nextdp->setpoint / 1000.0);
else
snprintf(temp, sizeof(temp), translate("gettextFromC", "Switch gas to %s"), gasname(&newgasmix));
len += snprintf(buffer + len, sizeof(buffer) - len, "%s<br>", temp);
}
gaschange = false;
postponed = true;
}
gasmix = newgasmix;
}
}
lastprintdepth = newdepth;
lastdepth = dp->depth;
lastsetpoint = dp->setpoint;
} while ((dp = nextdp) != NULL);
len += snprintf(buffer + len, sizeof(buffer) - len, "</tbody></table></div>");
dive->cns = 0;
dive->maxcns = 0;
update_cylinder_related_info(dive);
snprintf(temp, sizeof(temp), "%s", translate("gettextFromC", "CNS"));
len += snprintf(buffer + len, sizeof(buffer) - len, "<div><br>%s: %i%%", temp, dive->cns);
snprintf(temp, sizeof(temp), "%s", translate("gettextFromC", "OTU"));
len += snprintf(buffer + len, sizeof(buffer) - len, "<br>%s: %i</div>", temp, dive->otu);
if (dive->dc.divemode == CCR)
snprintf(temp, sizeof(temp), "%s", translate("gettextFromC", "Gas consumption (CCR legs excluded):"));
else
snprintf(temp, sizeof(temp), "%s", translate("gettextFromC", "Gas consumption:"));
len += snprintf(buffer + len, sizeof(buffer) - len, "<div><br>%s<br>", temp);
for (int gasidx = 0; gasidx < MAX_CYLINDERS; gasidx++) {
double volume, pressure, deco_volume, deco_pressure;
const char *unit, *pressure_unit;
char warning[1000] = "";
cylinder_t *cyl = &dive->cylinder[gasidx];
if (cylinder_none(cyl))
break;
volume = get_volume_units(cyl->gas_used.mliter, NULL, &unit);
deco_volume = get_volume_units(cyl->deco_gas_used.mliter, NULL, &unit);
if (cyl->type.size.mliter) {
deco_pressure = get_pressure_units(1000.0 * cyl->deco_gas_used.mliter / cyl->type.size.mliter, &pressure_unit);
pressure = get_pressure_units(1000.0 * cyl->gas_used.mliter / cyl->type.size.mliter, &pressure_unit);
/* Warn if the plan uses more gas than is available in a cylinder
* This only works if we have working pressure for the cylinder
* 10bar is a made up number - but it seemed silly to pretend you could breathe cylinder down to 0 */
if (cyl->end.mbar < 10000)
snprintf(warning, sizeof(warning), " — <span style='color: red;'>%s </span> %s",
translate("gettextFromC", "Warning:"),
translate("gettextFromC", "this is more gas than available in the specified cylinder!"));
else
if ((float) cyl->end.mbar * cyl->type.size.mliter / 1000.0 < (float) cyl->deco_gas_used.mliter)
snprintf(warning, sizeof(warning), " — <span style='color: red;'>%s </span> %s",
translate("gettextFromC", "Warning:"),
translate("gettextFromC", "not enough reserve for gas sharing on ascent!"));
snprintf(temp, sizeof(temp), translate("gettextFromC", "%.0f%s/%.0f%s of %s (%.0f%s/%.0f%s in planned ascent)"), volume, unit, pressure, pressure_unit, gasname(&cyl->gasmix), deco_volume, unit, deco_pressure, pressure_unit);
} else {
snprintf(temp, sizeof(temp), translate("gettextFromC", "%.0f%s (%.0f%s during planned ascent) of %s"), volume, unit, deco_volume, unit, gasname(&cyl->gasmix));
}
len += snprintf(buffer + len, sizeof(buffer) - len, "%s%s<br>", temp, warning);
}
dp = diveplan->dp;
if (dive->dc.divemode != CCR) {
while (dp) {
if (dp->time != 0) {
struct gas_pressures pressures;
fill_pressures(&pressures, depth_to_atm(dp->depth, dive), &dp->gasmix, 0.0, dive->dc.divemode);
if (pressures.o2 > (dp->entered ? prefs.bottompo2 : prefs.decopo2) / 1000.0) {
const char *depth_unit;
int decimals;
double depth_value = get_depth_units(dp->depth, &decimals, &depth_unit);
len = strlen(buffer);
snprintf(temp, sizeof(temp),
translate("gettextFromC", "high pO₂ value %.2f at %d:%02u with gas %s at depth %.*f %s"),
pressures.o2, FRACTION(dp->time, 60), gasname(&dp->gasmix), decimals, depth_value, depth_unit);
len += snprintf(buffer + len, sizeof(buffer) - len, "<span style='color: red;'>%s </span> %s<br>",
translate("gettextFromC", "Warning:"), temp);
} else if (pressures.o2 < 0.16) {
const char *depth_unit;
int decimals;
double depth_value = get_depth_units(dp->depth, &decimals, &depth_unit);
len = strlen(buffer);
snprintf(temp, sizeof(temp),
translate("gettextFromC", "low pO₂ value %.2f at %d:%02u with gas %s at depth %.*f %s"),
pressures.o2, FRACTION(dp->time, 60), gasname(&dp->gasmix), decimals, depth_value, depth_unit);
len += snprintf(buffer + len, sizeof(buffer) - len, "<span style='color: red;'>%s </span> %s<br>",
translate("gettextFromC", "Warning:"), temp);
}
}
dp = dp->next;
}
}
snprintf(buffer + len, sizeof(buffer) - len, "</div>");
dive->notes = strdup(buffer);
}
int ascent_velocity(int depth, int avg_depth, int bottom_time)
{
/* We need to make this configurable */
/* As an example (and possibly reasonable default) this is the Tech 1 provedure according
* to http://www.globalunderwaterexplorers.org/files/Standards_and_Procedures/SOP_Manual_Ver2.0.2.pdf */
if (depth * 4 > avg_depth * 3) {
return prefs.ascrate75;
} else {
if (depth * 2 > avg_depth) {
return prefs.ascrate50;
} else {
if (depth > 6000)
return prefs.ascratestops;
else
return prefs.ascratelast6m;
}
}
}
void track_ascent_gas(int depth, cylinder_t *cylinder, int avg_depth, int bottom_time, bool safety_stop)
{
while (depth > 0) {
int deltad = ascent_velocity(depth, avg_depth, bottom_time) * TIMESTEP;
if (deltad > depth)
deltad = depth;
update_cylinder_pressure(&displayed_dive, depth, depth - deltad, TIMESTEP, prefs.decosac, cylinder, true);
if (depth <= 5000 && safety_stop){
update_cylinder_pressure(&displayed_dive, 5000, 5000, 180, prefs.decosac, cylinder, true);
safety_stop = false;
}
depth -= deltad;
}
}
bool trial_ascent(int trial_depth, int stoplevel, int avg_depth, int bottom_time, double tissue_tolerance, struct gasmix *gasmix, int po2, double surface_pressure)
{
bool clear_to_ascend = true;
char *trial_cache = NULL;
cache_deco_state(tissue_tolerance, &trial_cache);
while (trial_depth > stoplevel) {
int deltad = ascent_velocity(trial_depth, avg_depth, bottom_time) * TIMESTEP;
if (deltad > trial_depth) /* don't test against depth above surface */
deltad = trial_depth;
tissue_tolerance = add_segment(depth_to_mbar(trial_depth, &displayed_dive) / 1000.0,
gasmix,
TIMESTEP, po2, &displayed_dive, prefs.decosac);
if (deco_allowed_depth(tissue_tolerance, surface_pressure, &displayed_dive, 1) > trial_depth - deltad) {
/* We should have stopped */
clear_to_ascend = false;
break;
}
trial_depth -= deltad;
}
restore_deco_state(trial_cache);
return clear_to_ascend;
}
bool enough_gas(int current_cylinder)
{
cylinder_t *cyl;
cyl = &displayed_dive.cylinder[current_cylinder];
if (!cyl->start.mbar)
return true;
if (cyl->type.size.mliter)
return (float) (cyl->end.mbar - prefs.reserve_gas) * cyl->type.size.mliter / 1000.0 > (float) cyl->deco_gas_used.mliter;
else
return true;
}
int plan(struct diveplan *diveplan, char **cached_datap, bool is_planner, bool show_disclaimer)
{
struct sample *sample;
int po2;
int transitiontime, gi;
int current_cylinder;
unsigned int stopidx;
int depth;
double tissue_tolerance = 0.0;
struct gaschanges *gaschanges = NULL;
int gaschangenr;
int *stoplevels = NULL;
bool stopping = false;
bool clear_to_ascend;
int clock, previous_point_time;
int avg_depth, max_depth, bottom_time = 0;
int last_ascend_rate;
int best_first_ascend_cylinder;
struct gasmix gas;
int o2time = 0;
int breaktime = -1;
int breakcylinder = 0;
int error = 0;
set_gf(diveplan->gflow, diveplan->gfhigh, prefs.gf_low_at_maxdepth);
if (!diveplan->surface_pressure)
diveplan->surface_pressure = SURFACE_PRESSURE;
create_dive_from_plan(diveplan, is_planner);
if (prefs.verbatim_plan)
plan_verbatim = true;
if (prefs.display_runtime)
plan_display_runtime = true;
if (prefs.display_duration)
plan_display_duration = true;
if (prefs.display_transitions)
plan_display_transitions = true;
if (prefs.last_stop)
decostoplevels[1] = 6000;
/* Let's start at the last 'sample', i.e. the last manually entered waypoint. */
sample = &displayed_dive.dc.sample[displayed_dive.dc.samples - 1];
get_gas_at_time(&displayed_dive, &displayed_dive.dc, sample->time, &gas);
po2 = sample->setpoint.mbar;
if ((current_cylinder = get_gasidx(&displayed_dive, &gas)) == -1) {
report_error(translate("gettextFromC", "Can't find gas %s"), gasname(&gas));
current_cylinder = 0;
}
depth = displayed_dive.dc.sample[displayed_dive.dc.samples - 1].depth.mm;
average_max_depth(diveplan, &avg_depth, &max_depth);
last_ascend_rate = ascent_velocity(depth, avg_depth, bottom_time);
/* if all we wanted was the dive just get us back to the surface */
if (!is_planner) {
transitiontime = depth / 75; /* this still needs to be made configurable */
plan_add_segment(diveplan, transitiontime, 0, gas, po2, false);
create_dive_from_plan(diveplan, is_planner);
return(error);
}
tissue_tolerance = tissue_at_end(&displayed_dive, cached_datap);
#if DEBUG_PLAN & 4
printf("gas %s\n", gasname(&gas));
printf("depth %5.2lfm \n", depth / 1000.0);
#endif
best_first_ascend_cylinder = current_cylinder;
/* Find the gases available for deco */
if (po2) { // Don't change gas in CCR mode
gaschanges = NULL;
gaschangenr = 0;
} else {
gaschanges = analyze_gaslist(diveplan, &gaschangenr, depth, &best_first_ascend_cylinder);
}
/* Find the first potential decostopdepth above current depth */
for (stopidx = 0; stopidx < sizeof(decostoplevels) / sizeof(int); stopidx++)
if (decostoplevels[stopidx] >= depth)
break;
if (stopidx > 0)
stopidx--;
/* Stoplevels are either depths of gas changes or potential deco stop depths. */
stoplevels = sort_stops(decostoplevels, stopidx + 1, gaschanges, gaschangenr);
stopidx += gaschangenr;
/* Keep time during the ascend */
bottom_time = clock = previous_point_time = displayed_dive.dc.sample[displayed_dive.dc.samples - 1].time.seconds;
gi = gaschangenr - 1;
if(prefs.recreational_mode) {
bool safety_stop = prefs.safetystop && max_depth >= 10000;
track_ascent_gas(depth, &displayed_dive.cylinder[current_cylinder], avg_depth, bottom_time, safety_stop);
// How long can we stay at the current depth and still directly ascent to the surface?
while (trial_ascent(depth, 0, avg_depth, bottom_time, tissue_tolerance, &displayed_dive.cylinder[current_cylinder].gasmix,
po2, diveplan->surface_pressure / 1000.0) &&
enough_gas(current_cylinder)) {
tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0,
&displayed_dive.cylinder[current_cylinder].gasmix,
DECOTIMESTEP, po2, &displayed_dive, prefs.bottomsac);
update_cylinder_pressure(&displayed_dive, depth, depth, DECOTIMESTEP, prefs.bottomsac, &displayed_dive.cylinder[current_cylinder], false);
clock += DECOTIMESTEP;
}
clock -= DECOTIMESTEP;
plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, true);
previous_point_time = clock;
do {
/* Ascend to surface */
int deltad = ascent_velocity(depth, avg_depth, bottom_time) * TIMESTEP;
if (ascent_velocity(depth, avg_depth, bottom_time) != last_ascend_rate) {
plan_add_segment(diveplan, clock - previous_point_time, depth, gas, po2, false);
previous_point_time = clock;
last_ascend_rate = ascent_velocity(depth, avg_depth, bottom_time);
}
if (depth - deltad < 0)
deltad = depth;
tissue_tolerance = add_segment(depth_to_mbar(depth, &displayed_dive) / 1000.0,
&displayed_dive.cylinder[current_cylinder].gasmix,
TIMESTEP, po2, &displayed_dive, prefs.decosac);
clock += TIMESTEP;
depth -= deltad;
if (depth <= 5000 && safety_stop) {
plan_add_segment(diveplan, clock - previous_point_time, 5000, gas, po2, false);
previous_point_time = clock;
clock += 180;
plan_add_segment(diveplan, clock - previous_point_time, 5000, gas, po2, false);
previous_point_time = clock;
safety_stop = false;
}
} while (depth > 0);
plan_add_segment(diveplan, clock - previous_point_time, 0, gas, po2, false);
create_dive_from_plan(diveplan, is_planner);
add_plan_to_notes(diveplan, &displayed_dive, show_disclaimer, error);
fixup_dc_duration(&displayed_dive.dc);
free(stoplevels);
free(gaschanges);
return(error);
}
if (best_first_ascend_cylinder != current_cylinder) {
stopping = true;