coding object movement help

Question

Hello, I'm trying to code an object that moves UP/DOWN/LEFT/RIGHT on a flat surface, no diagonal. I'm using a basic if statement like this:

 if(Input.GetKey("a"))
 {
 //moveLeft
 }
 else
 if(Input.GetKey("w"))
 {
 //moveUp
 }
 else
 if(Input.GetKey("d"))
 {
 //moveRight
 }
 else
 if(Input.GetKey("s"))
 {
 //moveDown
 }

The problem is that I want the order in which the keys are pressed to not matter. Right now, if I press W(up) while holding A(left), the object ignores W and keeps moving left because it's the first in the if statement. On the other hand, if I press D(right) while holding S(down), the direction changes and the object moves right. If I let go of D(right), the object goes back to moving down; This last bit is how I want all the keys to react. How do I fix this in code? Any help would be great, thanks!

Answer 1

Answer by okiwanben0bi · Oct 30, 2014 at 03:23 PM

 private float moveLeftRight=0;
 private float moveUpDown=0;

in Update:

 // GetKeyDOWN gets the key once when it is pressed. So, you ever get the "newest" key.
 if(Input.GetKeyDown("a"))
 {
   moveLeftRight= - 1.0f;
   moveUpDown=0.0f;
 }
 
 if(Input.GetKeyDown("d"))
 {
   moveLeftRight= 1.0f;
   moveUpDown=0.0f;
 }
 
 if(Input.GetKeyDown("w"))
 {
   moveLeftRight=0.0f;
   moveUpDown= - 1.0f;
 }
 
 if(Input.GetKeyDown("s"))
 {
   moveLeftRight=0.0f;
   moveUpDown= 1.0f;
 }

 // Maybe reset the values.

 // GetKeyUP gets the key once when it is released.
 if(Input.GetKeyUp("a") && moveLeftRight== - 1.0f)
 {
   moveLeftRight=0.0f;
 }

 if(Input.GetKeyUp("d") && moveLeftRight== 1.0f)
 {
   moveLeftRight=0.0f;
 }

 if(Input.GetKeyUp("w") && moveUpDown== - 1.0f)
 {
   moveUpDown=0.0f;
 }

 if(Input.GetKeyUp("s") && moveUpDown== 1.0f)
 {
   moveUpDown=0.0f;
 }

 // (NO if)
 //move left or right (X += speed * moveLeftRight);
 //move up or down (Y += speed * moveUpDown);

I hope that helps. Not tested.

Add comment · Show 1 · Share

boonda · Oct 31, 2014 at 10:11 AM 0

Share

Thanks. This gives me some ideas and I'll experiment further, but it doesn't do the whole thing that I want. If I'm holding down W and then press S and let go of S, I still want W to read afterwards because it's still being held down. Right now, if I press and let go of S, I will lose W as well and the object stops, so you lose the "getkeydown" state...I'm guessing because getkeydown is not continuously being checked... sorry, i'm new at this.. so what would be the best way to check if a key was being held down before another key was pressed and let go?

coding object movement help

1 Reply

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions