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Question by 1tanner · Nov 04, 2015 at 08:25 PM · errorvector3quaternion

Help with Quaternions and Vector3s

Quaternion newRotation = Quaternion.LookRotation(playerToMouse); playerRigidbody.MovePosition (newRotation); With this code, I'm getting the error "Argument 1: cannot convert from 'UnityEngine.Quaternion' to 'UnityEngine.Vector3' ". I am following the Survival Shooter Tutorial, but am getting an error from the code they wrote. Maybe an issue with the newer version of Unity?

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avatar image 1tanner · Nov 05, 2015 at 06:44 AM 0
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I'm following the official Unity 3D tutorial on their website, and I double checked to make sure I typed everything correctly. They are using an older version of Unity, so I'm not sure if that has anything to do with it... Any idea of how I could change the code to make it work correctly?

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Answer by saschandroid · Nov 05, 2015 at 07:08 AM

From what I see in the tutorial code:

 // Create a quaternion (rotation) based on looking down the vector from the player to the mouse.
 Quaternion newRotation = Quaternion.LookRotation (playerToMouse);
 
 // Set the player's rotation to this new rotation.
 playerRigidbody.MoveRotation (newRotation);

So it's NOT playerRigidbody.MovePosition but playerRigidbody.MoveRotation

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avatar image 1tanner · Nov 05, 2015 at 01:06 PM 0
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Thank you!

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Answer by fafase · Nov 04, 2015 at 08:32 PM

   Rigidbody.MovePosition(Vector3);

this method expects a Vector3 but your newRotation is a rotation. Either you should stop the tutorial right now as it is a pile of junk or you did not follow exactly (maybe a bit of both).

The first line gets a rotation while the second line performs a movement. You must have something missing in between. Event converting your rotation to a vector3 would not make sense as you get a rotation and MovePosition should get a position to move to.

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