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In a dive, when you choose a very low GFlow (like 5 or 9) and a trimix
with quite some He (12/48 in the example) and descend fast, the ceiling
seems to do strange things in the first minutes of the dive (very very
deep for example or jumping around).
To understand what is going on we have to recall what gradient factors do
in detail: Plain Buehlmann gives you for each tissue a maximal inert gas
pressure that is a straight line when plotted against the ambient
pressure. So for each depth (=ambient pressure) there is a maximally
allowed over-pressure.
The idea of gradient factors is that one does not use all the possible
over-pressure that Buehlmann gives us but only a depth dependent fraction.
GFhigh is the fraction of the possible over-pressure at the surface while
GFlow is the fraction at the first deco stop. In between, the fraction is
linearly interpolated. As the Buehlmann over-pressure is increasing with
depth and typically also the allowed overpressure after applications of
gradient factors increases with depth or said differently: the tissue
saturation has to be lower if the diver wants to ascent.
The main problem is: What is the first stop (where to apply GFlow)? In a
planned dive, we could take the first deco stop, but in a real dive from a
dive computer download it is impossible to say what constitutes a stop and
what is only a slow ascent?
What I have used so far is not exactly the first stop but rather the first
theoretical stop: During all of the dive, I have calculated the ceiling
under the assumption that GFlow applies everywhere (and not just at a
single depth). The deepest of these ceilings I have used as the “first
stop depth”, the depth at which GFlow applies.
Even more, I only wanted to use the information that a diver has during
the dive, so I actually only considered the ceilings in the past (and not
in the future of a given sample).
But this brings with it the problem that early in the dive, in particular
during the descent the lowest ceiling so far is very shallow (as not much
gas has built up in the body so far).
This problem now interferes with a second one: If at the start of the dive
when the all compartments have 790mbar N2 the diver starts breathing a
He-heavy mix (like 12/48) and descents fast the He builds up in the
tissues before the N2 can diffuse out. So right at the start, we already
encounter high tissue loadings.
If now we have a large difference between GFhigh and GFlow but they apply
at very similar depth (the surface and a very shallow depth of the deepest
ceiling (which for a non-decompression dive would be theoretically at
negative depth) so far) it can happen that the linear interpolation as
opposite slope then in the typical case above: The allowed over-pressure
is degreasing with depth, shallower depth do not require lower gas loading
in the tissue (i.e. can be reached after further off-gasing) but but
tolerate higher loadings. In that situation the ceiling disappears (or is
rather a floor).
So far, I got rid of that problem, by stating that the minimum depth for
GFlow was 20m (after all, GFlow is about deep stops, so it should better
not be too shallow). Now the dive reported in ticket #549 takes values to
an extreme in such away that 20m (which is determined by
buehlmann_config.gf_low_position_min in deco.c) was not enough to prevent
this inversion problem (or in a milder form that the interpolation of
gradient factors is in fact an extrapolation with quite extreme values).
This patch that gets rid of the problem for the dive described above but
still it is possible to find (more extreme) parameter choices that lead to
non-realistic ceilings.
Let me close by pointing out that all this is only about the descent, as
it is about too shallow depth for GFlow. So no real deco (i.e. later part
of the dive) is inflicted. This is only about a theoretical ceiling
displayed possibly in the first minutes of a dive. So this is more an
aesthetically than a practical problem.
Fixes #549
Signed-off-by: Robert C. Helling <helling@atdotde.de>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Showing the GF in the preferences is just confusing.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Silly little change. Whatever.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This patch paints the dive red if the user is breaking ceiling
on the planner - it's quite fast, it analizes the depth over the
max(tissue_1 .. tissue_16) and changes the color of the profile.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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I keep trying to get to consistenct.
Completely hopeless.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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We used both preferencesChanged and settingsChanged in different
methods and classes to mean the same thing, this adds consistency.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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silly code cleanup.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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The original name was a really bad choice as we have a 'diveid' as part of
struct divecomputer - and that is not the diveid that is being used here.
Instead we use the 'id' member of struct dive which holds the "unique ID"
for this dive.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This commit renames getDiveById to get_dive_by_id, and it also removes the
Q_ASSERTS and if(!dive) return that the callers of this function were
calling. If it has a Q_ASSERT this means that the dive must exist,
so checking for nullness was bogus too. I've changed the assert (done
in a silly C-Way.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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-Renaming prefs members for consistency.
-Changing references of QSettings to the prefs structure instead.
-Removing unused functions in pref.h were left over from an old version.
-Changing the data-type of bool members to short for consistency with other members.
Signed-off-by: Gehad elrobey <gehadelrobey@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This seems like a rather obvious optimization...
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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The existing code for toggling the DC reported ceiling in red or "surface
color" clearly had never been tested.
This seems to create a reasonably attractive implementation - not exactly
what we had in the past, but good enough.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Adds new push button "HR" to the button bar on the dive profile to
toggle display of heart rate.
TODO: New icon for the heart rate button is needed.
Fixes #485
Signed-off-by: Lakshman Anumolu <acrlakshman@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Qt5 uses different widths for some of the poly. lines
in the profile. Setting an explicit value fixes that.
Tested-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Especially in O2 decompression parts of a dive, the pp02 is typically very
close to the threshold value (normally 1.60 bar). The old implementation
of the pp profile graphs assumes that there is exacty 1 consecutive set of
samples that needs to be in the "warning color". This results in an
erroneous display of the mentioned graphs, connecting multiple episodes of
too high pp with bogus lines in between.
This fix generalizes the pp graph logic to allow for multiple segments of
high pp, each to been drawn seperately in the "warning color".
Signed-off-by: Jan Mulder <jlmulder@planet.nl>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This is just removal of dead code from the old profile, probably there's
still a bit more to remove, but this is a very good cleanup already.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Fixes #445
Signed-off-by: Gopichand Paturi <gopichandpaturi@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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I know everyone will hate it.
Go ahead. Complain. Call me names.
At least now things are consistent and reproducible.
If you want changes, have your complaint come with a patch to
scripts/whitespace.pl so that we can automate it.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This simply tries to pick at least local minima / maxima.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Remove unused variable and correct comment.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This allows us to give it a different color (red) and make it a smaller
size.
While implementing this I also fixed the size of the temperature text in
the new profile.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Show decimal depth and make the line length more appropriate for the dive
profile shown.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Unused variables, more initialization order complaints.
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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That particular dive didn't have a temperature, and thus we got a crash
while accessing the last temperature text.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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The last temperature text used to have the same align flags
as all the other texts: Right. this makes it much more appealing.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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The code shamelessy copied from the old profile introduced
a bug where the old temperature was not correctly shown.
I'v added a new member to the class that will store the
last valid temperature, and use that to calculate if there's
a reason or not to display it.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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When we move, shrink or expand the depth axis, the
meandepth should also change it's position. this
patch adds that.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This patch does a few things:
1 - reset the model when user closes the dive file
2 - connects the 'rowsAboutToBeRemoved' in a way that the graphics can
remove their polygons too
3 - adds a 'clear' virtual method so items that don't follow the rules can
clean themseves up.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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But in general we should not show the profile of a dive that
was recently removed from the list - e.g. via File->Close.
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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* Initialize/construct all variable members in constructor list.
Signed-off-by: Boris Barbulovski <bbarbulovski@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This patch makes use of a cache variable instead of creating / accessing a
new one via operator[], because for some reason QGraphicsPolygonItem
doesn't return a reference for polygon and a copy is always made.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This patch optimizes a few items when hitting the
'save preferences' dialog, since when a preference is
modified, all the items try to reload their visual
based on wether a preference changed or not, the correct
code for 'hey, my pref changed, let's update' needed
to be done.
now the axis will only set a new maximum if it's different
from the old one ( and thus, going to a new dive with
the same maxdepth or maxtime as the old one will not touch
their axis, not triggering gratuitous animations. )
also, the 'incr by 3m' was not being called - it seems
that our 'syncsettings' method is not storing things on
the 'prefs' global var. I added just for the incr by 3m
case, but it's something that we need to check later.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Created a method to check if calculations should take place
taking into consideration what changed on the model. if the
model changes *everything*, them, all calculations should
be done, but if just some of the columns of the model are
changed, only those columns should trigger an visual update
on the items.
In theory this patch looks right, but something is wrong (
calculations are not being made. ), so I'll commit this any
how, and fix on the next commit.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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The gradient factor is shown with this patch, but the correct position
should still be adjusted.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This patch only adds preference-awareness for the ceiling.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This patch makes the color of the cylinder pressure use the sac colors.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This commit is rather big, and I forgot to cut it in pieces.
The first part creates a new 'calculate_gas_information' that will not
fill the profile_info->maxpp member ( that should be removed from it as
soon as the new dialog is finished ). The reason for that is that all of
the profile data will be calculated and the graph needs to update
dynamically, so whenever the settings changes, I ask for the model which
is the biggest graph and replot only the ones we need.
The second part adds a new animation function 'animdelete' to fade-out and
delete the item when it's done. the old function 'hide' did just that but
a hide shouldn't delete anything.
The third part is preferenes awareness for the PP graphs. I created two
new functions that receive the settings key for visibility and use the
QSettings to show / hide them. This also works quite well for the axis;
if no graph is visible, the axis will also hide itself.
The fourth part is colors. The pp graphs now have the correct colors.
And a bit of code cleanup too.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This makes the beginning of the partial gas pressures, there's
two more. but this code uses a good part of the Model View system,
and it's way clearer than the old one. Luckly the other 2
missing items will be even more clear ( the diffs ) to do,
because I just need to create a new PartialPressureGasItem and
set the properties. <3
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This patch prevents memory leak by adding the text on the list of
'delete me when model changes' items. it also makes things a bit more
snappy because the scene doesn't have to deal with all of the
texts bounding rectangles eveytime.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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the profile item should also use the model to know when to
change something, this makes it happen.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This patch moves the temperature item as a cache that will
be updated as the model updates, instead of deleting / recreating
it everytime the dive changes.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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The last patch correctly moved the GasPressure item to use
a cache-based system, but ignored the fact that the Gas
pressure text was not being removed from the scene. this fixed
it.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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This makes the Gas Pressure Item a 'cached' item, when the dive
changes, the item will regenerate the drawing based on it's model.
Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
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Robert C. Helling
Dirk Hohndel
Tomaz Canabrava
Gehad Elrobey
Lakshman
Lubomir I. Ivanov
Jan Mulder
Gopichand Paturi
Tomaz Canabrava
Boris Barbulovski