4.5.9 arcade platformer projectile shoots up and falls

[Shyartist]

How can I make a projectile shoot upwards and fall back down? I'm trying to do it in the arcade platformer module with the jump script and its not budging.

 

[Shyartist]

nevermind, solved. commented out a bunch of lines and it worked

 

[strawmancomics]

can you tell me what you did?

 

[smilehero65]

can you tell me what you did?

1. So, first you make an AI behavior for the monster to MoveUp - this can't be achieved by default in modules with gravity, so I recommend to first move:
Vertical movement AI for enemies in metroidvania project

Your AI behavior code could be this:

TXA
STA tempA
LDA #FACE_UP
TAY
LDA DirectionTableOrdered,y
STA tempB
LDA FacingTableOrdered,y
STA tempC
StartMoving tempA, tempB, #$00
ChangeFacingDirection tempA, tempC

Alternative: if what you want your object to make a sort of a jump, you may actually try using a Monster Jump
How to add a "Monster Jump" AI script [NESMaker 4.0.X - Module Platformer]

If this is what you want, then you don't need to follow the next step.


2. Assign that behavior to Action Step 0 of your projectile. You will put your AI behavior here, put a timer of X seconds, check the Ignore Gravity flag and set your EndAction to Advance.

 

[smilehero65]

With this, your projectile will go straight up and after X seconds, it will respond to gravity and fall.

 

[strawmancomics]

THANK YOU THANK YOU THANK YOU!!! That worked!