Feature webarkitrackers

[kalwalt]

I will not merge this in the dev branch it will serve only as a reminder.
I am testing this code for WebARKit; there are a lot of unwanted commits (my fault) that i don't want to merge. But i think this will be useful as a reference.

Classes

First this is the folder structure:
Inside include:

• WebARKitTrackers
  • WebARKitOpticalTracking
    • WebARKitAkazeTracker.h
    • WebARKitConfig.h
    • WebARKitEnums.h
    • WebARKitOrbTracker.h
    • WebARKitUtils.h

Inside lib/SRC:

• WebARKitTrackers
  • WebARKitOpticalTracking
    • WebARKitAkazeTracker.cpp
    • WebARKitConfig.cpp
    • WebARKitOrbTracker.cpp

As you can see there are two main classes WebARKitAkazeTracker and WebARKitOrbTracker
There are very similar but one use Akaze and the last Orb.
All the WebARKit classes are included in the webarkit namespace.
This the base code for https://github.com/kalwalt/webarkit-testing in detail see PR:
webarkit/webarkit-testing#4
webarkit/webarkit-testing#7
The code si heavily inspired by https://github.com/EdwardLu2018/wasm-ar

Features to add

• create abstract class WebARKitTracker so WebARKitAkazeTracker and WebARKitOrbTracker will be derived from.
• removing emscripten code from WebARKit*Tracker classes.
• add other usfeful common methods.
• webarkit namespace

[kalwalt]

I recently merged a PR webarkit/webarkit-testing#8 within i released the first raw example. So we can say that the code in this branch https://github.com/kalwalt/WebARKitLib/tree/feature-webarkitrackers-pointers is working as expected.
I think that finally i can move to create a branch on WebARKitLib to host this code. I don't want to send a PR from this branch because there are a lot of 'tedious-unwanted' commits.
So i can think also to clean the code a bit and maybe rethinking some parts of it.

[kalwalt]

i have created the new WebARKitTracker class, it seems that is correct; I will remove emscripten code from it. I think that is not necessary, better to mantain free from emscripten includes.

[kalwalt]

I did all the planned changes, i think it is time to move on. I will transfer the code in the original repository and i will close this PR as said.

[kalwalt]

I migrated the code so i can close this. For more infos see webarkit/webarkit-testing#15