Exception problem with transform.position

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I've made this script for moving an object (a platform) in the game, but I'm a beginner and I don't know if what I've done is right, the NullReferenceException is at partenza.position in the Start function. I don't know why it's wrong and I don't know how to fix it, I just want the object to move right to left or up and down by a distance

var orizz_vert : boolean = true; //vero = orizzontale, falso = verticale var velocita : int = 2; var pausa : int = 1; //tempo di pausa in secondi var ontrigger : boolean = false; //se attiva funziona in modo diverso var distanza : int = 20; private var arrivo : Transform; private var partenza : Transform;

function Start(){ partenza.position = Vector3(transform.position.x, transform.position.y, transform.position.z); if(orizz_vert){ arrivo.position = Vector3(transform.position.x + distanza, transform.position.y, transform.position.z); } else{ arrivo.position = Vector3(transform.position.x, transform.position.y + distanza, transform.position.z); }

/ function OnDrawGizmosSelected () { Gizmos.color = Color.blue; Gizmos.DrawLine (partenza.position, arrivo.position); //disgna una linea tra partenza e arrivo }/

function Update () { if(!ontrigger){ if(orizz_vert){ //muovi orizz transform.position = Vector3.Lerp(partenza.position, arrivo.position, Time.deltaTime * velocita); if(Vector3.Distance(partenza.position, arrivo.position) <= 0){ WaitForSeconds(pausa); var niente : Transform = partenza; //scambio partenza e arrivo partenza = arrivo; arrivo = niente; } } else { //muovi vert

     }

 }

}

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Answer by Eric5h5 · Apr 02, 2011 at 10:36 PM

"partenza" is null until you assign something to it. Since you've made it private, you can't assign a Transform in the inspector, so you'll have to use some other method (or just make it public). Same problem with "arrivo".

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sonic220 · Apr 02, 2011 at 11:07 PM 0

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the fact is that I want that variable to be set at the start of the game, I don't want to create more object in the scene, so I setted the vectors in the Start function. What should I do?

Eric5h5 · Apr 02, 2011 at 11:52 PM 0

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@Volt3: I guess you don't actually want Transforms? Probably just use Vector3.

Exception problem with transform.position

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