What is a Linear Animation?
A linear animation is a form of motion in which an object or property moves or changes at a constant speed from beginning to end.
According to the provided reference, a key characteristic of this animation type is that "It's is a movement at constant speed." This means the rate at which the animation progresses remains the same throughout its entire duration. There is no acceleration or deceleration; the movement is uniform and predictable.
Linear vs. Changing Speed
The reference also describes another type of animation, stating, "It's an animation starting slowly and gradually transforming into a bit faster animation." This description does not apply to linear animation but rather to easing functions, where the speed changes over time.
The reference highlights why linear motion (constant speed) is often preferred over animations that change speed:
- "This is not good for animating 360° as it would move slower in the beginning and faster in the end of its full revolution."
For continuous actions like a 360° rotation or a simple loop, a linear animation ensures a smooth and consistent pace without awkward starts or finishes. As the reference notes, "Linear type of animation is better for our purpose" in such scenarios, providing steady movement crucial for consistent visual experiences.
Why Choose Linear Animation?
Linear animation is often used when:
- Precision is needed: You require an element to reach a specific state or position at an exact time.
- Consistency is paramount: For looping movements or continuous transitions, constant speed ensures seamless repetition.
- Simplicity is desired: It's the most straightforward timing function and serves well when complex speed changes aren't necessary.
Comparison of Animation Speed
| Feature | Linear Animation | Non-Linear Animation (Easing) |
|---|---|---|
| Speed Profile | Constant Speed | Varies (e.g., starts slow, ends fast) |
| Use Case Example | Loading bars, simple move | Smooth UI transitions |
| 360° Rotation | Consistent, Smooth | Can be uneven or jerky |
In essence, linear animation provides a reliable, steady pace for visual changes, making it suitable for tasks where uniform timing is the primary goal.
