Getter Filtering

Filtering lets you pass in a custom function to some getter functions that decides whether an object should be included or not.

// Simple filter: return true only if obj is a deposit
static bool is_deposit(const t_obj *obj)
{
	return (obj->type == OBJ_DEPOSIT);
}

void example(void)
{
	t_pos pos = {5, 5}; // search around this position

	// Use the filter with the nearest-object getter
	t_obj *nearest = core_get_obj_filter_nearest(pos, is_deposit);

	if (nearest) printf("Nearest deposit at (%d,%d)\n", nearest->pos.x, nearest->pos.y);
}

Here, is_deposit acts as the condition. The getter runs this check on every object in the game and returns the one closest to (5,5) that passes.

This can be used with a large variety of different getter functions.