RFC: PSCR dive plots: Part 2.
Robert Helling
helling at atdotde.de
Tue Mar 13 03:31:47 PDT 2018
> On 13. Mar 2018, at 11:28, Robert Helling <helling at atdotde.de> wrote:
>
>> On 12. Mar 2018, at 15:58, Willem Ferguson <willemferguson at zoology.up.ac.za <mailto:willemferguson at zoology.up.ac.za>> wrote:
>>
>> b) Adapting the gas partial pressure graphs to reflect what the diver breathes during bailout. When rendering the dive by creating a plot_info structure for each sample, the easiest mechanism of incorporating bailout would be to use the Shearwater approach: have a byte indicating Loop or Bailout and perform the appropriate calculation for gas partial pressures. Alternatively, it may be possible to reference the linked list of existing events, find the next bailout event and plot the pO2 depending on the type of bailout event (i.e. Bailout or OC->Loop). But this would incur significantly more computational overhead since this lookup will be needed for each plot_info on the dive profile.
>
> how is a bailout different than a gas change event (except semantics of “emergency”). Why don’t you insert a gaschange to OC (i.e. with set point 0)?
>
Sorry, I am too slow. This is of course PSCR.
I wouldn’t add a byte (not even a bool) to indicate that. Rather do it with events (given that most of the dives don’t have any such event and those that have have very few). You would need to establish a similar logic as with gas switches (or even piggy pack this info into the gasswitch events).
Robert
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Robert C. Helling Elite Master Course Theoretical and Mathematical Physics
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