| 3 | | Development began in 2007, as a small C++ library implementing |
| 4 | | the ZHL16 algorithm, and the frontend was just a simple |
| 5 | | command-line tool. Initially this was all just a mental |
| 6 | | excersise, trying to get a better understanding of deco theory. |
| | 3 | Development began in 2007, as a small C++ library implementing the |
| | 4 | ZHL16 algorithm, and the frontend was just a simple command-line |
| | 5 | tool. Initially this was all just a mental excersise, trying to get a |
| | 6 | better understanding of deco theory. |
| 14 | | Sometime in May 2008 I bought a !MacBook Pro and fell in love |
| 15 | | with the thing (despite being a linux user since 94, and |
| 16 | | open-sorce contributor for many many years). I started porting |
| 17 | | the app to MacOS, but still with the gtk+/gnome frontend. |
| | 14 | Sometime in May 2008 I bought a !MacBook Pro and fell in love with |
| | 15 | the thing (despite being a linux user since 94, and open-sorce |
| | 16 | contributor for many many years). I started porting the app to MacOS, |
| | 17 | but still with the gtk+/gnome frontend. |
| 19 | | However, gtk+/gnome UIs on MacOS don't look good, so in the |
| 20 | | summer of 08 while living back home in Copenhagen for a while, I |
| 21 | | installed the developer package and first looked at bit writing a |
| 22 | | native MacOS app, but my dive buddy urged me to look at the |
| 23 | | iPhone instead. So I started looking at the iPhone SDK, and |
| 24 | | around August, the first version was up and running, a very |
| 25 | | simple UI with a picker for depth & bottom time plus two sliders |
| 26 | | for oxygen and helium content, and the profile was just dumped in |
| 27 | | a textview. |
| | 19 | However, gtk+/gnome UIs on MacOS don't look good, so in the summer of |
| | 20 | 08 while living back home in Copenhagen for a while, I installed the |
| | 21 | developer package and first looked at bit writing a native MacOS app, |
| | 22 | but my dive buddy urged me to look at the iPhone instead. So I started |
| | 23 | looking at the iPhone SDK, and around August, the first version was up |
| | 24 | and running, a very simple UI with a picker for depth & bottom time |
| | 25 | plus two sliders for oxygen and helium content, and the profile was |
| | 26 | just dumped in a textview. |
| 29 | | At this point I started focusing on implementing the VPM/B |
| 30 | | algorithm in C++, by reading the fortran implementation by Erik |
| 31 | | C. Baker. Part of this was done by instrumenting the fortran code |
| 32 | | to generate C++ unittest code to validate the output of the |
| 33 | | individual parts of the algorithm. VPM/B was definitely a |
| 34 | | challenge and most harder to understand than Buhlmann's ZHL16, |
| 35 | | but from peoples reports of diving using VPM/B planned dives, I |
| 36 | | felt it was worth it. |
| | 28 | At this point I started focusing on implementing the VPM/B algorithm |
| | 29 | in C++, by reading the fortran implementation by Erik C. Baker. Part |
| | 30 | of this was done by instrumenting the fortran code to generate C++ |
| | 31 | unittest code to validate the output of the individual parts of the |
| | 32 | algorithm. VPM/B was definitely a challenge and most harder to |
| | 33 | understand than Buhlmann's ZHL16, but from peoples reports of diving |
| | 34 | using VPM/B planned dives, I felt it was worth it. |
| 38 | | By late 08, the implementation was mostly done, and around this |
| 39 | | time I had finally actually bought an iPhone. This meant |
| 40 | | that the UI got more attention again, ie. the profile moved from |
| 41 | | text view into tables, settings moved away from the system |
| 42 | | settings page and into the app using pickers and sliders. Luckily |
| 43 | | a friend of mine is a Apple UI designer, and he gave a lot of |
| 44 | | good suggestions on best and most common-place iPhone UI design |
| 45 | | choices, such as use of tables and sections, editing and input |
| 46 | | widgets. |
| | 36 | [[Image(oldiphoneapp.png)]] |
| | 37 | |
| | 38 | By end of sumer 08, the implementation was mostly done, and around |
| | 39 | this time I had finally actually bought an iPhone. This meant that the |
| | 40 | UI got more attention again, ie. the profile moved from text view into |
| | 41 | tables, settings moved away from the system settings page and into the |
| | 42 | app using pickers and sliders. Luckily a friend of mine is a Apple UI |
| | 43 | designer, and he gave a lot of good suggestions on best and most |
| | 44 | common-place iPhone UI design choices, such as use of tables and |
| | 45 | sections, editing and input widgets. |
