Description

• With tweens, we have linear movement
• With sequence, we have serial or parallel linear movements

It's fine but for some type of motion it can still look quite unnatural.
The idea would be to provide so specific tween (only with position: Vector2(x, y) or Vector3(x,y,z)):

• Curve (simple bezier curve with 2 control point)

Fatina.bezier(
  {x:0, y:0}, // start
  {x:108, y:32}, // control point 1
  {x:176, y:32}, // control point 2
  {x:196, y:160}, // end position
  250 // duration
)
// any usual method (.setTimescale(), .yoyo(), onComplete(), .setEasing(), ...)
.start()

• Path: go through a list of 2D point in a certain duration (unlike sequence where each tween has his duration)

Fatina.path(
  [{x:0, y:0}, {x:108, y:32}, {x:176, y:32}, {x:196, y:160}], // n point to go through
  250 // duration
)
// any usual method (.setTimescale(), .yoyo(), onComplete(), .setEasing(), ...)
.start()

• Curve Path: A mix of both previous one, the equivalent of sequence for curves.

Concern

• For bezier, yes there is a real need
• For Path and Curve path, I still wonder if it's not possible to just use Sequence and provide a way to compute duration based on global speed and distance of each tween on the fly.

Screenshot

Bezier curve

Curve Path