How do i align my camera with a gameobjects x and y axis?

Question

(Im fairly new to Unity) Ok so i have these 2 rooms and i have the camera looking at the first room.

IDEA

I want it so that when the player enters the second room, the camera moves its view to the other room (in a 2D perspective)

alt text

PROBLEM

Ive tried using a box filling the room acting as a trigger, and OnTriggerEnter it would align the camera's x and y axis with the box trigger's axis. (But not the Z so it keeps the distance) but so far i have had no luck at all. and i have screwed around with the code so much now that i even find it irrelevant to post. Can anyone come up with a script that could do this, it would be MUCH appreiciated.

Answer 1

Best Answer

Answer by Mrobertson · Oct 16, 2012 at 11:43 PM

I'd parent your camera to a game object (lets call it "CameraParent") and set the "CameraParents" position to the room1's position, then back your camera up to the distance and angle you want it to be. When your Player hits the trigger call a function to move the "Camera Parent" object to the next room

Possible Example:

 void OnTriggerEnter(Collider collider)
     {
         StartCoroutine("MoveCameraToNextRoom");    
     }
     IEnumerator MoveCameraToNextRoom()
     {
         float t = 1;
         while(t > 0)
         {
             cameraParent.position = Vector3.Lerp(oldRoom.position, newRoom.position, t);
             t -= Time.deltaTime;
             yield return null;
         }
     }

(not tested)

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NaZer · Oct 17, 2012 at 12:55 AM 0

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I couldnt really get this to work, theres a lot of commands in there i dont know and its giving me alot of console errors. Such as:

(1,5): UCE0001: ';' expected. Insert a semicolon at the end.

(1,30): BCE0044: expecting ), found 'collider'.

(1,38): BCE0043: Unexpected token: ).

(3,46): BCE0044: expecting :, found ';'.

Mrobertson · Oct 17, 2012 at 01:06 AM 0

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from your errors it looks like your using javascript, I'm more comfortable with C# maybe you'll understand this better?

//next room trigger is hit

function OnTriggerEnter(other : Collider) {

StartCoroutine("$$anonymous$$oveCameraToNextRoom");
}

function $$anonymous$$oveCameraToNextRoom() {

var t = 1;

while(t > 0)

{

//set cameraParent, oldRoom and newRoom to something or you'll of course get a null exception

  cameraParent.position = Vector3.Lerp(oldRoom.position, newRoom.position, t);

  t -= Time.deltaTime;

//waits for one frame

  yield ;

} }

no clue how to get this to format correctly :(

NaZer · Oct 17, 2012 at 11:27 AM 0

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Whoops, yea i'm sorry i didn't clarify that it was Javascript :P

But so far my code looks like this:

//Variables

var cameraParent: GameObject;

var room1: GameObject;

var room2: GameObject;

//Assigning variables to gameobjects

function Start() {

 cameraParent = GameObject.Find("cameraParent");

 room1 = GameObject.Find("room1");

 room2 = GameObject.Find("room2");

}

//next room trigger is hit

function OnTriggerEnter(other: Collider) {

 StartCoroutine("$$anonymous$$oveCameraToNextRoom");

}

function $$anonymous$$oveCameraToNextRoom() {

 var t = 1;

 while (t > 0) {

     //set cameraParent, oldRoom and newRoom to something or you'll of course get a null exception

     cameraParent.position = Vector3.Lerp(room1.position, room2.position, t);

     t -= Time.deltaTime;

     //waits for one frame

     yield;
 }

}

And it detects the player colliding with the trigger but when it does it gives me a null reference that looks like this:

NullReferenceException: Object reference not set to an instance of an object triggerCameraScript+$$$anonymous$$oveCameraToNextRoom$5+$.$$anonymous$$oveNext () (at Assets/triggerCameraScript.js:25) UnityEngine.$$anonymous$$onoBehaviour:StartCoroutine(String) triggerCameraScript:OnTriggerEnter(Collider) (at Assets/triggerCameraScript.js:16)

I have tried using both GameObject.Find (seen above) and tried adding them manually in the editor but no difference.

Mrobertson · Oct 17, 2012 at 01:40 PM 0

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I had cameraParent room1, and room2 as Transforms, all you would have to do is either set your variables to Transform rather than gameobject or set cameraParent.position to cameraParent.transform.position

NaZer · Oct 17, 2012 at 03:32 PM 0

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Yea it works now, its just not very smooth it skips from on place to the other.

How do i align my camera with a gameobjects x and y axis?

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