Problem with collision callback

[xtreampb]

I posted that b/c i changed it back. I removed the pointers at 'entity0' and 'entity1' and the above line is still throwing the error.

[DaDonik]

The collision callback you pass to SetEntityCallback() can't be a member function of a class

 

Thats not quite true, the callbacks can also be static class member functions.

[Roland]

This works

 

 

class MyClass
{
TEntity _this;

static void _stdcall _onCollision( TEntity entity0, TEntity entity1, byte* position, byte* normal, byte* force, flt speed );

public:
MyClass();
};


MyClass::MyClass()
{
// create the entity _this
// _this = CreateXXXXX


// register for collison detection
SetEntityUserData( _this, reinterpret_cast<BP>(this) );
SetEntityCallback( _this, reinterpret_cast<BP>(_onCollision), ENTITYCALLBACK_COLLISION );
}

void MyClass::_onCollision( TEntity us, TEntity them, byte* position, byte* normal, byte* force, flt speed )
{
MyClass* pThis = reinterpret_cast<MyClass*>(GetEntityUserData(us)) ;
if( pThis == 0)
		 return;

// Do your thing on collision
// You are pThis
}

[Rick]

Yeah, that's another way to do it. I just prefer having 1 callback function that automatically handles all my collision forwarding to my objects.

[xtreampb]

my OnColl function is only calling the collision of the last instance of the class that was created. so if one entity collides with another, if another instance of the entity was created after this one, then only the last entity collision function will be called. so another example,

object_1 object_2 object_3 was created using class A. rock_1 rock_2 rock_3 was created using class b. when rock_ rock_2 rock_3 collide with object_2, the collisions for object_3 is called and executed. this is done using ricks method. is this happening b/c of polymorphism? i don't see how. anyone got any ideas?

[xtreampb]

I fixed the issue. I needed to set my block object as a pointer and pass the pointer to the list that stored all my block objects.

[xtreampb]

hey rick. Does this work with LE3 as well or what are you doing for your collision handling in Leadwerks 3?