You can use Unity to animate your GameObjectThe fundamental object in Unity scenes, which can represent characters, props, scenery, cameras, waypoints, and more. A GameObject’s functionality is defined by the Components attached to it. More info
See in Glossary’s rotations. There are different methods of applying these rotations to suit your project best.
See Rotation and orientation in Unity for more information on rotational representations.
You can use the Animation window to choose how Unity applies rotation to your GameObject. Unity uses interpolation to calculate how a GameObject visually moves from one orientation to another in your animation.
Different interpolation methods look different in motion, but have the same result. Unity offers three types of interpolation for your animations:
Euler Angles interpolation applies the full range of motion to the GameObject specified by the angles you enter; if the rotation is greater than 360 degrees, the GameObject rotates fully before it stops at the correct orientation.
Euler Angles (Quaternion) interpolation uses the above interpolation method but bakes the information into a quaternionUnity’s standard way of representing rotations as data. When writing code that deals with rotations, you should usually use the Quaternion class and its methods. More info
See in Glossary curve. This method uses more memory but results in a slightly faster runtime.
Quaternion interpolation rotates the GameObject across the shortest distance to a particular orientation. For example, regardless of whether the rotation value is 5 degrees or 365 degrees, the GameObject rotates 5 degrees.
Animation from external sources often contains rotational keyframeA frame that marks the start or end point of a transition in an animation. Frames in between the keyframes are called inbetweens.
See in Glossary animation in Euler format. Unity resamples these animations and generates new keyframes for each frame in the animation to avoid rotations that exceed the valid range of rotational quaternions.
For example, if you have two keyframes that are six frames apart with the x value going from 0 to 270 degrees, the GameObject rotates 90 degrees in the opposite direction because it’s the shortest way to get to the same result. Instead, Unity resamples and adds a keyframe on every frame, so the rotation is only 45 degrees between keyframes and the rotation is correct.
If the quaternion resampling of the imported animation doesn’t match the original closely enough for your needs, you can turn off animation resampling and use the original Euler animation keyframes at runtime. For more information, see Euler curve resampling.
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