Creating Save and Load Systems - Unity Game Development Scripting - page 179

Creating the SaveHandler script
Now, we create a script that allows us to call the functions that we just created from
the preceding two scripts. First, we create a checkpoint system that saves game data
at specific points within the game. Then, we create a way to allow the player to save
their data whenever they want to. To get started, create a new script, and name it
SaveHandler .
The checkpoint system
The first way in which we create to save and load data is a checkpoint system. Check-
points are typically areas in the game world on reaching which the game will save the
player's data. Add this function to allow the checkpoint to save:
void OnTriggerEnter(Collider other)
{
if(other.tag == "SavePoint")
{
Camera.main.SendMessage("WriteToFile");
Destroy(other.gameObject);
}
}
This is a trigger-based method to save. When the player enters the triggered area,
the game will save the player's data. Within the if statement, you can call any of the
save functions we created. You should take note that this function also destroys the
trigger object so that the player can't reactivate the checkpoint.
The save anywhere-anytime system
To allow the player to save their data anywhere they want and anytime they want, we
add some kind of option for them to call it freely. This can be done by adding to the
menu a key or a button, or both, that the player presses. For this example, we will let
the player press keys on the keyboard to save and load. Add the following function to
create this functionality;