#passing object into constructor, and then modifying the data. But is null.

9 messages · Page 1 of 1 (latest)

pallid cliff
#

Hey

void create_tree (Entity_data& entity_data, int id /* position */ )
{
    std::vector<float> vertices = 
    {
        -0.8f, -0.8f, 0.0f, 1.0f, 0.0f, 0.0f, // Vertex 1 (position and color)
        0.0f,  0.8f,  0.0f, 0.0f, 1.0f, 0.0f, // Vertex 2 (position and color)
        0.8f,  -0.8f, 0.0f, 0.0f, 0.0f, 1.0f  // Vertex 3 (position and color)
    };
    entity_data.entity_vec.push_back ( id );
    RenderObject obj = RenderObject ( vertices );
    entity_data.render_map.emplace ( id,  obj );
}

int main ( )
{
    Entity_data entity_data;
    
    Engine engine = Engine ( entity_data ) ;
    create_tree ( engine.get_entity_data() ,  1 /* id */ );
    engine.run ( ); 
}

Engine::Engine ( Entity_data& entity_data ) : entity_data(entity_data)
{
    for ( auto& a : this->entity_data.render_map[1].get_vertices() )
    {
        std::cout << a << std::endl; 
    }
}

So from the above, when i use the create tree function, i expect in the constructor (and any call after calling the engine constructor) to print the data i emplace in the map.

but for some reason its null and idk why??

any more info i can give lmk.

just trying to figure out what the loop in constructor ( ii have also made loops after the c onstructor example in main after the create_tree with a get_entity_data from the engine function and nothing still.

thanks.

versed nebulaBOT
#

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inland robin
#

You are putting data into the map after constructing the Engine.

pallid cliff
inland robin
#

the constructor runs first, then you add data to the map

#

so how should the constructor print the data that is added later?

pallid cliff
#

yeah its working now

#

im an idiot

#

thank you for pointing that out