Quaternion Slerp help

Question

I've been looking around and even if I use the exact code people are using I still can't get this to work for the life of me so I've been just working on my own code to no avail

 public float speed;
 private Transform CurrentPos;

 void Start() {
     CurrentPos = transform.rotation;
 }

 void OnColisionEnter () 
 {
     CurrentPos = Quaternion.Slerp(CurrentPos, Quaternion.Euler(0,90,0), Time.deltaTime * speed);
 }

I get an error after start on line 5

 CurrentPos = transform.rotation;

error CS0029: Cannot implicitly convert type UnityEngine.Quaternion' > toUnityEngine.Transform'

I then get 2 errors on line 10

 CurrentPos = Quaternion.Slerp(CurrentPos, Quaternion.Euler(0,90,0), Time.deltaTime * speed);

The best overloaded method match for UnityEngine.Quaternion.Slerp(UnityEngine.Quaternion, > UnityEngine.Quaternion, float)' has > some invalid arguments > error CS1503: Argument#1' cannot convert UnityEngine.Transform' > expression to type >UnityEngine.Quaternion'

No matter how I try to approach it I get errors, I can't seem to grasp Quaternion by the looks of it, I have tried setting it to Transform.Rotation,Y = 90 as the target position but I still get errors

I understand that Quaternion uses X,Y,Z,W but it even says on the Scripting API that you can use Quaternion.Euler which gives a Vector3 and you still get an error

I feel unity API could explain these a lot better, from what I'm reading none of the methods seem to work

Answer 1

Best Answer

Answer by Bluntweapon · Sep 16, 2014 at 05:00 PM

The following code assumes you've already changed to OnCollisionStay, and that this script is attached to whichever object you want to rotate on contact.

 public float speed;
 
 private Quaternion targetRotation;
 
 void OnCollisionEnter(){
     //rotation * euler(0,90,0) should give you the current rotation rotated 90 degrees
     targetRotation = transform.rotation * Quaternion.euler( 0, 90, 0 );
 }
 
 void OnCollisionStay () 
 {
     transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, Time.deltaTime * speed);
 }

You'll notice you don't really need whatever was in Start(), since calling transform.rotation is basically the same.

EDIT: I just realized something. OnCollisionStay is called every frame something stays in the collider. If you just destroy the colliding object then it makes sense that OnCollisionStay only fires off once and you only rotate for 1 frame.

EDIT 2: Man I don't know how I totally confused rotations for positions...

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jjplay175 · Sep 16, 2014 at 05:17 PM 0

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When I have it onTriggerStay the guys goes through the box which is what I want but after that it just stays

http://puu.sh/bBxeu/4f3fa47eb3.png

As you can see the box is still there but it's not moving the door more than the 3 it already did

Bluntweapon · Sep 16, 2014 at 06:21 PM 0

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Ignore what I said. I apparently confused rotations for positions.

Edited above answer.

jjplay175 · Sep 16, 2014 at 07:40 PM 0

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I changed it to update and I noticed that it didn't move, it just stuck depending on what the speed was

I managed to get it working in a way that is better for the purpose of opening a door by using

 void OnTriggerEnter()
 {
     Debug.Log ("Checking If Req Met");
     Debug.Log (frontKey);
     if(frontKey == 1)
     {
         doorOpen.enabled = true;
     }
 }

And my doorOpen is

 void Start() {
     currentAngle = rightDoor.localEulerAngles;
     currentAngle = leftDoor.localEulerAngles;
 }
 
 void Update()
 {
     timeTime = timeTime + Time.deltaTime;
     rightDoor.localEulerAngles = Vector3.Slerp(currentAngle, new Vector3( 0, 90, 0), timeTime * speed);
     leftDoor.localEulerAngles = Vector3.Slerp(currentAngle, new Vector3( 0, -90, 0), timeTime * speed);

     if (rightDoor.eulerAngles.y >= 90)
     {
         this.enabled = false;
     }
 }

This seems to work quite well, after the door is open it disables itself to stop Update draining resources

I will also try your code tomorrow to see if that works, might help with future scripts

Bluntweapon · Sep 16, 2014 at 08:13 PM 0

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This way is probably better, as it doesn't depend on colliders being in other colliders.

Quaternion Slerp help

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