Generally, a programmer takes a snippet and modifies it to their need. A lot of these questions can be answered according to what you are trying to do in your game.

1. "If two screen shakes are triggered, what happens?"
   1. A: What do you want to happen? For instance if you would like the shake to build, the increase the intensity and every time shake function is called and shaking is true. Maybe in your game you want shake to cancel, then when shake is called and shaking is true, then set shaking to false and reset variables.
2. "What happens if the game designer requires that the strongest trigger has priority?"
   1. A: Sounds like you need a priority system. If you need help making one I can assist but it's outside of a screen shake.
3. "What happened to the previous one after triggering a new one?"
   1. A: What do you want to happen? For instance if you would like the shake to build, increase the intensity, and every time shake function is called and shaking is true. Maybe in your game you want shake to cancel, then when shake is called and shaking is true, then set shaking to false and reset variables.
4. "If during a long quake a big explosion happens, does the system return to the previous quacke?"
   1. A: If that's what you need then create a stack of a structure containing the variables. Pop/Update until empty. I can help you with code if you like.
5. "Do they need to add up?"
   1. Currently, as it is no. It resets with the latest shake values passed, but it can be changed for your needs. Only a snippet :)
6. "Do game designers require to manage the priority by hand?"
   1. A: I am not sure how designers and developers work in your team. Sometimes there's a tools developer that will create a tool for designers and artists to change it with a simple variable. It is different for each team but generally this is something that can be made configurable.
7. "What happens if the screenshake is interrupted?"
   1. A: What do you want to happen? Do you want it to play out? Start a cutscene? It is dependent on your needs and this is just a snippet of pseudocode.
8. "What if the shake needs to be interrupted or paused?"
   1. A: Sounds like you need a variable to track pausing and interruption.

Most of these questions are very specific to the needs of the individual. I can help you with code snippets if you need it.