SetEntityCallBack with GetEntithyUserData with an External Class Member

[Shard]

Ok, so I've got a small mess in code here.]

 

Basically, I'm creating a trigger system where the player collides with a box body and activates the events that are stored with that Trigger.

 

So below is the Trigger Class:

struct Trigger
{
TVec3 pos;
TSound *music;
TSound *speech;
string scene;

TBody body;

int usable;

int characterLoadID;

Trigger()
{
	this->music = NULL;
	this->speech = NULL;
}
};

 

 

So when I create the box body, I

SetEntityUserData(trigger->body,(byte*)trigger); 

and then

SetEntityCallback(trigger->body,(byte*)TriggerCollision,ENTITYCALLBACK_COLLISION);

 

 

And thats where I start to face my problems. I need to check if the player collides with the box body and then activate the ActivateTrigger Function inside my Level class.

 

But it seems like I can't put the TriggerCollision Callback inside my Level handler class because when it tries to cast to the byte* it says it can't cast to a class bound function. So I had to remove it from my level class. But only the TriggerCollision Callback function can ActivateTrigger function, but that is inside the Level Class.

 

Confused? I am.

 

Hopefully this helps:

 

What I Need

Initializing: Load::LoadTriggers -> CollisionCallback -> Level::TriggerCollision

Running: Level::TriggerCollision -> Level::ActivateTrigger

 

What I'm Forced To Do

Initializing: Load::LoadTriggers -> CollisionCallback -> TriggerCollision //Note that TriggerCollision isn't inside a class so that I can CollisionCallback to it

Running: TriggerCollision -> ?? //I need Level::ActivateTrigger but I don't have anyway to access it!

 

 

I'll attach my .h and .cpp files so that you can take a gander at it but I've only included the relevant files (Load and Level) so there will be some missing files.

Problems.zip

[ZioRed]

Cannot you do the inverse? That is: add a Level variable and an Activate method in the Trigger class and then if you can call an ActivateTriggerCallback method on Level variable passing "this" from Trigger.Activate()

 

Or also you could create a struct with Trigger and Level to pass to SetEntityUserData instead of trigger only.

[Shard]

Cannot you do the inverse? That is: add a Level variable and an Activate method in the Trigger class and then if you can call an ActivateTriggerCallback method on Level variable passing "this" from Trigger.Activate()

 

Or also you could create a struct with Trigger and Level to pass to SetEntityUserData instead of trigger only.

 

 

Thanks for your suggestions. I took your idea and added a static Level pointer to the Trigger class. That solved all my problems.

 

On a lesser note, where did you get the images in your signature?

[Pixel Perfect]

Yes, the callback function is in global space so you need to get a pointer to the level class to it. You could either make a pointer available globally which the callback could just reference or pass the pointer as stored data to the trigger object using SetEntityUserData and access that from inside the callback routine.

[ZioRed]

Thanks for your suggestions. I took your idea and added a static Level pointer to the Trigger class. That solved all my problems.

Glad to help, I would prefer too the OOP way against the old way of a global variable

 

On a lesser note, where did you get the images in your signature?

I grabbed them from the Leadwerks forum PNG and C# exe icon (using IcoFX)

[Pixel Perfect]

Glad to help, I would prefer too the OOP way against the old way of a global variable

Haha .. you guys make me laugh at times. If you're using GetEntityUserData to obtain a pointer to the trigger class instance then that, to all intents and purposes, is a global variable as its in global space and available to everyone

 

Glad you have it working though! Are you still on target for your demo release Shard ?

[ZioRed]

Haha .. you guys make me laugh at times. If you're using GetEntityUserData to obtain a pointer to the trigger class instance then that, to all intents and purposes, is a global variable as its in global space and available to everyone

I wrote GetEntityUserData because Shard's code does not seem to be LEO: the "body" variable is declared as TBody and not Body