FCurve

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An FCurve (also written f-curve) is a function curve or the graph of a function. An example of a FCurve is a spline.

In the field of computer animation and especially in animation editors, e.g. Maya, an FCurve is an animation curve with a set of keyframes, which are represented as points, curve segments between keys, and tangents that control how curve segments enter and exit a key. These keys are laid out on a graph that displays their position relative to zero. One can have keys that are either positive or negative values. [1]

This visual graph of keyframes allows one to see the value of the key and its interpolation to the next key, which shows the animation "ease ins" and "ease outs".

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References

  1. "Introduction - Blender 4.1 Manual". docs.blender.org. Retrieved 2024-04-30.