GitLab

prevent rubber banding.

Rubber banding, or spring effect, often happens when recent point data
evaluation generates a considerable deceleration producing velocity
direction opposite to the current direction. This could happen because
of noise in the input pipeline or a sudden stop by the input pointer.
In order to mitigate this side effect, the current velocity vector is
compared with the future velocity vector by computing the dot product
between these two. If the result of the product is zero or less, it
means that they have opposing directions and the prediction is cut off.

Change-Id: I8a863475021f8531a7f2946325d458cad6d1138c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1860329Reviewed-by: Ella Ge <eirage@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Luis Sanchez Padilla <lusanpad@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#709979}