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Would it be possible to link gamekit with boost library? #46

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
I will like to use boost header files inside OgreKit. Basically I will like 
to use boost-threads and some other boost header files...

Original issue reported on code.google.com by silveira.nestor@gmail.com on 18 Feb 2010 at 10:21

GoogleCodeExporter commented 9 years ago

Original comment by silveira.nestor@gmail.com on 18 Feb 2010 at 10:22

GoogleCodeExporter commented 9 years ago 
Hmm, I would prefer to stay away from a boost dependency, simply because boost 
is
such a massive library. Since it's mostly header only, if parts can be 
extracted and
used from the Dependency directory it may be doable.

Best to see what Erwin's thoughts are.

Original comment by snailr...@gmail.com on 18 Feb 2010 at 11:34

GoogleCodeExporter commented 9 years ago 
Please no BOOST or other bloated libraries.

We have some threading abstraction in Bullet, and I supposed Ogre might also 
have such 
feature (or does Ogre use BOOST for that?).

In Bullet I also stay away from STL for cross-platform compatibility, but I 
suppose 
that isn't a big concern for GameKit.

Original comment by erwin.coumans on 19 Feb 2010 at 1:48

GoogleCodeExporter commented 9 years ago

Original comment by silveira.nestor@gmail.com on 19 Feb 2010 at 8:49

GoogleCodeExporter commented 9 years ago 
Pity! I wanted to implement some AI support for the logic nodes. But is too 
much work 
without boost support...
Are you planning to implement some kind of AI support inside OgreKit? (I mean 
A* 
pathfinder algorithm)

Original comment by silveira.nestor@gmail.com on 19 Feb 2010 at 10:56

GoogleCodeExporter commented 9 years ago 
AI support would be great, it's been on my todo list for some time now.

I would like to have AI not limited to nodes exclusively, but as a subsystem 
like
bricks & nodes.

What kind of structures & algorithms are you using from BOOST, in order to 
accomplish
A* ? Maybe with a little extra work, we can create internal algorithms to 
accomplish
this ?

Original comment by snailr...@gmail.com on 19 Feb 2010 at 2:55

GoogleCodeExporter commented 9 years ago 

We could check out this one:

http://code.google.com/p/recastnavigation

What features of boost do you need to implement AI efficiently?

Original comment by erwin.coumans on 19 Feb 2010 at 3:49

GoogleCodeExporter commented 9 years ago 
Here are the headers that I am using from boost:
#include <boost/statechart/state_machine.hpp>
#include <boost/statechart/simple_state.hpp>
#include <boost/statechart/state.hpp>
#include <boost/statechart/transition.hpp>
#include <boost/statechart/custom_reaction.hpp>
#include <boost/statechart/asynchronous_state_machine.hpp>
#include <boost/statechart/fifo_worker.hpp>
#include <boost/intrusive_ptr.hpp>
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
#include <boost/lambda/if.hpp>
#include <boost/lambda/loops.hpp>
#include <boost/lambda/switch.hpp>
#include <boost/lambda/construct.hpp>
#include <boost/lambda/casts.hpp>
#include <boost/lambda/exceptions.hpp>
#include <boost/lambda/algorithm.hpp>
#include <boost/lambda/numeric.hpp>
#include <boost/thread/condition_variable.hpp>
#include <boost/thread/condition.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/recursive_mutex.hpp>
#include <boost/thread/thread.hpp>
#include <boost/thread/barrier.hpp>
#include <boost/pool/pool_alloc.hpp>
#include <boost/pool/object_pool.hpp>
As you can see I am using boost massively. 
(Really I like the way boost is implemented. Its a nice set of libraries and 
very 
well documented.)
I have to say that for pure AI implementation is not really needed but I have a 
lot 
of code using it and I did not want to redo everything...
For A* what I do is to generate a depth map (once the scene is loaded) with all 
the 
static objects in the scene. Then I use this depth map in my pathfinder...
Via logic nodes I can instruct the engine to move gameobjects to some arbitrary 
point 
in the scene(x,y). In order to no stop main thread, logic calculates the path 
in 
another thread (I have implemented a transparent way to make 
asynchronous/synchronous  
calls between threads to perform (in this case) motion in the main thread but 
directed by AI thread....) 
It would be nice to have all this stuff in OgreKit and my first idea was to add 
it 
via logic nodes without touching the Core-Engine since I do not want to 
introduce any 
conflict with your code...

In any case what is really needed is some consistent API(interface) inside 
OgreKit to 
handle threads and perform synchronization. The rest... I can redo it.

By the way http://code.google.com/p/recastnavigation looks very interesting!

Thanks guys!

Original comment by silveira.nestor@gmail.com on 19 Feb 2010 at 4:42

GoogleCodeExporter commented 9 years ago 
I agree that we need to make OgreKit thread safe. I was thinking about trying to
extract threading information from the bullet multi threaded library to be used 
in
OgreKit. To be honest though, I have very little threading experience and am 
not sure
what all is needed in order to get this done.

Original comment by snailr...@gmail.com on 20 Feb 2010 at 6:44

GoogleCodeExporter commented 9 years ago 
Thanks Charlie! I just was wondering if having access to boost from inside 
OgreKit 
was possible. I understand Erwin concerns and I agree with him too. Anyway I 
can link 
externaly OgreKit and Boost and do all my experimental AI stuff without 
touching 
OgreKit...
If in the future you implement A* in OgreKit you are going to need threading 
support 
basically because pathfinding takes a bit of time and it cannot be implemented 
entirety inside the render loop(basically it will cause rendering to pause).

I was taking a look to recastnavigation and I like it. I think it could be a 
good 
candidate for navigation meshes and pathfinding inside OgreKit.

Anyway thanks you guys for considering all this Boost stuff....

Original comment by silveira.nestor@gmail.com on 21 Feb 2010 at 1:06

GoogleCodeExporter commented 9 years ago

Original comment by silveira.nestor@gmail.com on 25 Feb 2010 at 2:27