Game Development Reference
7. Insert Keyframes for each empty object and make an animaion ranging from 1 to 100
frames, changing the diagonal corner posiion. Press the I key on the first frame. Go to
the hundred keyframe, move the empty object to another locaion, and press I again.
The animaion is recorded:
The diagonal corner posiion of the empty objects are needed to move
simultaneously in diferent direcions than the water could have.