I need your help on the subject.
I know what I exactly want, but I do not know how to "tell" the constract how to do it.
I want to create a sort of "stack" for the powerups I collect.
Each time the player collects a power-up (from a selection of 4) a power-up icon appears at the bottom of the screen, and when he collects a new power-up (while there is already another active) instead of the power-up replacing the existing one or running alongside the active one, his icon joins the stack at the end .
After the power-up that is already active has finished working - I want all the icons to move one position towards the active power-up. Then the next power-up in the stack will start working. (I.e. the icon that was in position 4 moves to position 3, the icon that was in position 3 moves to position 2, and the icon that was in position 2 moves to position 1 and starts working) One step forward - except for the one that is already active (i.e. the new icon that is in position 4, the icon that was in position 4 moves to position 3, the icon that was in position 3 moves to position 2, and the icon that was in position 2 disappears ....)
It is important for me to note that I have 4 different power-ups, and a situation can arise where you have several double power-ups, that is, you can have a power-up of a shield and then one of shots, then another one of a shield, then a power-up of power.
Like I said I know what I want but how do I "tell" the software how to do it ...
My problem is divided into several stages:
1- Every time the player collects a power-up, I need to check if position 1 is free. If so, put the power-up icon there and turn it on. If position 1 is not available, check that position 2 is free - then put the icon in position 2, if position 2 is not available, check that position 3 is free - then put the icon in position 3. If position 3 is not available, check that position 4 is free - then put it In position 4.
I guess it's possible to do it using "else" but how do I tell him "if you already put the icon in one of the locations - stop! Do not put in the other locations because you have already put in one location"
2- When the active power up is over, I want to make the other icons "move" one position forward. Which will activate the power up that is first on the list. How do I tell them to move in the same order they were (you were in 4th place, move to 3rd place, etc.) only one position forward? I can not crack it ... that is, "the object that was in position X Y will move to a new position X Y (no matter what object it is)"
3- I guess the answers to the previous two questions will give me the knowledge to do what I want - that if all the places are active, and you collect a new power-up - then move only the power-up that is not active forward.
I know it was a long question but I tried to be the most accurate in my question so you can help me, I really really thank you! Thank you very much