Question

I have a game object which processed in two completely different places. In Contact Listener i check some conditions and if they occur i must save one or more portions of complex data. So i decided to use struct. For example:

struct SomeStruct
{
    int value1;
    int value2;
    CGPoint value3;
    b2Vec2 value4;
};

typedef SomeStruct SomeStruct;

In Game Scene i go through all game objects and if its the stack/array not empty, do some stuff and wipe it.

In Contact Listener it repeats from the beginning.

I must use this architecture because of strict order of execution (method must be called after other methods).

I suspect that i need something like vector or NSMutableArray (i think it will not work with struct), so vector may the the only way.

But don’t understand how to achieve it. May you help me with some code/pseudocode or link to the book/article where i can found a solution?

Answer 1

There is a lot of solutions for this problem.

1. Don’t use struct. An obj-c class is practically the same thing as a struct.
2. Use CFArray (CFArrayCreateMutable) and put it there as a pointer.
3. Use a C++ class with STL vector.
4. Use a C array (SomeStruct[]) and increase its length when you need it.
5. Use a classic implementation of a stack, with a linked list (every struct has a pointer to the next value).