Key frame interpolation
Using illustrator paths
Using bezier curves
'p' position property
'stopwatch' starting
Temporal - how it changes over time
Spacial: Shape of path in window
Hold key frame
Select all key frames
Animation > 'Toggle hold keyframe'
No dots n motion path between key frames
Half a yellow diamond
What happens now, there is no interprelation, no in-between frames, position remains fixed at key frame position until another key frame is reached
Useful for, eg. the ticking hand of a clock, a blink
Editing scale and opacity to mimic a blink
How to make key frames longer or shorter over a period of time
Select all of key frames
can be moved forward or backward
press ALT key, it can be compressed and be made to take longer or a shorter amount of time
Roving: Rove across time
Become black dots
Basically group key frames together, moving one key frame will adapt all
Using illustrator with after effects
Select object, press stop watch, paste object from illustator
The square will direct itself around the circle
If you want key frames to run anti clockwise
If you want object to rotate and orientate around circle:
Using masks
Masks in after effects are vector shapes
With layer selected, use a shape tool,
Mask properties
Feathering
Opacity
Expansion
Anchor points can be selected and changed
Double click mask, it can be moved, and shape can be adapted
This can create a sequence animation in which the shape is changing its form over time.
Alternatively, you can use the pen tool to create the shape of the mask.
Mask path property : 'M'
Select chosen masks beforehand
Press toggle switches / modes to show more options.
Luma : Used with photography
In this case we use : Alpha matt
Before
After