![]() But if you do know the value then you can create a new Quaternion and assign it to rotation of the object. It’s really difficult to know the quaternion value for rotation unless you are very familiar with the concept. } Set rotation of an object using Quaternion Public class Rotation_demo : MonoBehaviour If the initial rotation is (20,20,20) then after the script has executed the object’s rotation will be (30,30,30). Here is a code sample to rotate the object by 10 degrees in each axis. Use a Vector3 to store the values of by which you want the object to rotate in each Axis and then pass them to “transform.rotate”. This is the most used method when you have to provide the rotation value manually. Transform rotate syntax transform.rotate(Vector3) Rotating an object using Euler Angles and transform.rotate Transform Rotation syntax transform.rotation=Quaternion Transform.rotation is used to set the rotation of a game object whereas transform.rotate is used to rotate an object by the given angle. “transform.rotate” adds the rotation to already existing values, whereas transform.rotation assigns the Quaternion value directly to the object’s rotation. Transform.rotation takes a Quaternion and transform.rotate take a Vector3 with Euler angles. Both these functions take in different values and produce different output. Many get confused between the transform.rotation and transfrom.rotate. You can rotate an object using transform or you can create a simple animation or you can use Physics. Like movement in Unity there are multiple ways to rotate an object in Unity. Or you can use Quaternion.Set newQuaternion.Set(0.9f, 0.5f, 0.6f, 1) How to rotate an Object in Unity To set the value you can either give it while creating the new Quaternion like this Quaternion newrotation = new Quaternion(0.9f,0.5f,0.6f,1) Quaternion newrotation = new Quaternion() So, to create a new Quaternion, you need to create an object of the class and the syntax is shown below. Here is how Unity Displays Quaternion and Euler Angles for a Cube that has a rotation of (0,0,0) Let’s change the rotation to 45,60,90 and see the result Creating a new Quaternion It’s discussed in the later part of this blog post. Unity allows you to specify Euler angles and save them to Quaternion. ![]() Quaternion represents rotation in just 4 numbers and is easy to be processed. In order to rotate a 3D object, you require a rotation matrix that increases the computational requirement.It happens when two Axis align with each other and we lose one degree of freedom. Euler angles are subjected to Gimbal lock.There are certain limitations to Euler angles. A rotation in Euler Angles is basically the degree in each Axis (45,0,45). The easier way to represent a rotation is using Euler Angles. In Unity, Quaternion can also be represented using a vector 4. “w” represents the degree of rotation along the unit vector (xi, yj, zk). The structure of quaternion looks like this (xi, yj, zk, w) where (xi, yj, zk) is a unit vector that represents the angle between the orientation and each individual axis. Quaternion is a combination of a Vector3 and a scalar used to represent the rotation or orientation of an object. 12 Video Tutorial What is a Quaternion in Unity?
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