Instantiate only one Prefab per 40 unit

Question

Hello, I have a player and enemies. I am trying to do this:

'When the player moved 40 units in z axis, instantiate only one enemy'

My code:

 PlayerUpdateZ=transform.position.z;
 var iSayi:float= Mathf.FloorToInt( (PlayerUpdateZ/40);
 
 for (var i : int = 0;i < iSayi; i++) { 
    if (PlayerUpdateZ>(i*40) && PlayerUpdateZ<(i+1)*40)) 
       { 
        var enemy : GameObject = Instantiate(prefab,Vector3(0,0,SpawnPointZ),Quaternion.identity); 
       }
         
 }

This code instantiates too many objects when player's position is between 0-40, 40-80 ....

If i change the code like this, When the player speed up, unity doesn't detect every unit in z axis. So sometimes there is not any change when PlayerUpdateZ=40 or 80 or 120..

  if (PlayerUpdateZ==(i*40)) 
           { 
            var enemy : GameObject = Instantiate(prefab,Vector3(0,0,SpawnPointZ),Quaternion.identity); 
           }

How can i do this? Thanks in advance.

Answer 1

Best Answer

Answer by tfakgul · Oct 19, 2014 at 02:39 PM

Indeed, i could't work your code. I made some changes in the code and it's working :

  var oldZ : float;
  var unitsMoved : float;
  var PlayerUpdateZ : float;
  
  
  function Start()
  {
  oldZ = transform.position.z;
  }
  function Update ()
  {
     PlayerUpdateZ=transform.position.z;
     unitsMoved = PlayerUpdateZ-oldZ;
     if(unitsMoved >=40)
     {makeEnemy();
     BusZ=PlayerUpdateZ;}
  }
  function makeEnemy()
  {
  //Instantiate here
  }

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Answer 2

Answer by bubzy · Oct 19, 2014 at 07:33 AM

assuming that the player only moves forward on the z axis:

 var oldZ : float;
 var unitsMoved : float;
 
 
 function Start()
 {
 oldZ = transform.position.z;
 }
 
 function Update()
 {
 if(transform.position.z != oldZ)
 {
 unitsMoved += transform.position.z - oldZ;
 }
 if(unitsMoved >=40)
 {
 makeEnemy();
 }
 
 }
 
 
 function makeEnemy()
 {
 //your instantiate code here
 }

I don't code in JS btw this is my guess at how it looks in JS :D

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tfakgul · Oct 19, 2014 at 11:37 AM 0

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Your code is true in JS, don't worry :D Btw, this is working fine. And also i noticed that my big mistake is 'i used int variable for PlayerUpdateZ' thanks to you. I changed it to float and ; if (PlayerUpdateZ>(i*40) && PlayerUpdateZ<1+(i*40) ) this code is working.

Thanks your help :)

Instantiate only one Prefab per 40 unit

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