48 / GESTURE PHYSICS
Predicted Pointer Events
The problem
Ink and cursors wait for the next hardware sample, so fast motion always feels a frame behind.
The solution
When supported, native predicted events extend the path; otherwise a labelled local velocity model estimates ahead.
This mechanic is best experienced with a pointer.
Experiment
Task: Draw a fast curve and watch the predicted tip lead the actual samples.
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THOUGHTFUL
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horizon32ms
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Play with the values
32ms
6
How it works
Seen in
Drawing apps
Ink extends slightly ahead of the stylus so strokes feel immediate.
Stylus note apps
Predicted samples fill the gap between pen reports and display refresh.
Games
Aim reticles and trails anticipate motion to hide input latency.
Whiteboards
Freehand marks stay under the tip even when the OS delivers samples late.