Move
Spacing
Animators do not move a ball by instinct alone. Height over a bounce is a curve: slow at the top, fast at the ground. Dots placed at equal time show the spacing. Squash sells the contact.
height(u) = sin(π·u) ^ k
Hang at the top0.35
Squash0.55
Bounces3
Dots are equal slices of time. They bunch up where the ball is slow and spread where it is fast. A higher hang flattens the peak of the sine curve. Squash hits only at contact.