Hi,
I have a vector of bullets:
static std::vector<boost::shared_ptr<Bullet>> *bullets;
But when i remove a bullet from vector with the code:
bullets->erase(std::find(bullets->begin(), bullets->end(), (boost::shared_ptr<Bullet>)this));
I get this error(see the image below):
http://www.prsolucoes.com/downloads/error_vector.png
What i do wrong?
Error when delete object from vector
You are casting "this" to a boost::shared_ptr<Bullet>. That is incredibly dangerous, do not cast something unless you are 200% sure of what you are doing.
You might want to research boost::shared_from_this, or write a custom comparator that compares the inner pointers, not the shared_ptr<> objects.
Better still, remove the static vector with automatic deregistration. There are superior designs.
You might want to research boost::shared_from_this, or write a custom comparator that compares the inner pointers, not the shared_ptr<> objects.
template<typename T>struct FindSharedPtr{private: const T *ptr;public: FindSharedPtr(const T *ptr) : ptr(ptr) {} bool operator()(const boost::shared_ptr<T> &shared) const { T &ref = *shared; return &ref == ptr; }};// later...bullets.erase(std::find(bullets.begin(), bullets.end(), FindSharedPtr(this));Better still, remove the static vector with automatic deregistration. There are superior designs.
Author
Hi,
I have used the "shared_from_this()" from boost, but i receive an exception:
http://www.prsolucoes.com/downloads/error_boost.png
When i try:
Turret::Turret(float angle)
{
shared_from_this()->angle = angle;
initialize();
}
Im calling it from constructor
I have used the "shared_from_this()" from boost, but i receive an exception:
http://www.prsolucoes.com/downloads/error_boost.png
When i try:
Turret::Turret(float angle)
{
shared_from_this()->angle = angle;
initialize();
}
Im calling it from constructor
Author
I solve the problem not using the function "shared_from_this" on constructor.
I use only on initilize method, and now i create and initialize the object like it:
boost::shared_ptr<Turret> turret1(new Turret());
turret1->initialize(0); //this is the method the contains "shared_from_this"
GameObjects::turrets->push_back(turret1);
Thanks.
The game is working now, deleting all fom memory.
I use only on initilize method, and now i create and initialize the object like it:
boost::shared_ptr<Turret> turret1(new Turret());
turret1->initialize(0); //this is the method the contains "shared_from_this"
GameObjects::turrets->push_back(turret1);
Thanks.
The game is working now, deleting all fom memory.
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