I am not a programming expert, there is something i am struggling for. How to avoid code repetition? For example: I need to write the move code in every state that involves movement. Gravity is another issue, i am repeating all gravity stuffs all over the states. Any advice ?
Viewing post in TrueState - Finite State Machine for GMS2 comments
Yeah, that is one of the downsides of the State Machine pattern. Because each state fully encapsulates everything that object is doing in any one step, that means anything that is shared is duplicated.
I often write functions like "move_and_collide" which would handle gravity and collision and all that. These "helper functions" are defined globally and available in any state on any object. Sometimes I'll allow those functions to accept arguments such as "in this state the gravity is .2, where as in this state the gravity is .3" or have them return results such as "I've hit the ground or a wall" so that the state can react accordingly.