Bug - Bezier curve drag bug

[tomorrowevening]

Once a keyframe has easing on both sides, changing the value in-editor results in exponential curvature.

Screen_Recording_2023-10-22_at_19.32.57.mov

[bigmistqke]

to clarify:

• the bug is most visible when the two consecutive values are very close to each other in y-value,
• most likely due to the fact that the coordinates of the beziers are defined relative to plane defined by the two consecutive points, like a lerp.

to illustrate:
while relative to the plane works when the delta in y-values is not close to 0

it creates enormous values once it does come close to 0

if you then start moving the points you will get the erratic behavior as seen above

my proposal:
have the y-value of the bezier's handles be defined in an absolute unit, while the x-value is relative to the distance from 1 point to the consecutive point.

an example of how that looks like:

Screen.Recording.2023-10-23.at.09.03.32.mov

link to implementation in solid