kult::entities() always returns 0 entities

[tVoss]

Under the current implementation of kult::entities(), nothing is ever returned. My current method for getting all entities (and deleting them) now is looping through all the component types and purging them that way. Hopefully a solution to this can be found.

[r-lyeh-archived]

Are you sure about this? Can you compile tests.cxx and check output for last two tests? This is what I get:

[ OK ] 617 entities().size() == 2 (No error)
[ OK ] 620 entities().size() == 0 (No error)

[tVoss]

Ah because for your test the entities are always in scope. In my use case I'll create the entity in one method, and then try to access all of them in a different method. This causes no live instances to actually exist, just reference to ids in the respective component classes.

[tVoss]

Since everything kult related is accessed in a static manner, and my EntityManager is very object oriented, my solution is adding a manager component to each entity created which holds the id of the EntityManager that created it. This allows me to easily get all related entities that I need with kult::join and an if statement around the id.

[r-lyeh-archived]

Or you could have something like this instead:

class EntityManager {
std::vector<kult::entity*> entities;
kult::entity &add();
void del( const kult::entity &);
}

kult::entity &EntityManager::add() {
entities.push_back( new kult::entity );
return *entities.back();
}

void EntityManager::del( const kult::entity &k ) {
entities.erase( std::find(k, entities.begin(), entities.end() );
}

[r-lyeh-archived]

You dont need N factories to create N type of entites. A single factory should handle them all.

Example to create different kind of entities with a single factory:

EntityManager em;
kult::entity &ent1 = em.add();
kult::entity &ent2 = em.add();
ent1[ position ] = vec2f();
ent2[ shape ] = circle();
assert( kult::entities() == 2 );
em.del( ent1 );
em.del( ent2 );
assert( kult::entities() == 0 );

[tVoss]

This method of manually adding and removing entities takes away a lot of magic that made your library great! Take a look at my project to see how I'm using the manager component to get all the entities that belong to a certain EntityManager.

https://github.com/tVoss/AnotherGame

Sorry for being the only one create issues in this repo!