3 ms·
You can lift one finger and place another finger quickly enough to fool some older touchpads. I was able to do it fairly consistently with my old Dell laptop.
by rcthompson 9y ago
You can lift one finger and place another finger quickly enough to fool some older touchpads. I was able to do it fairly consistently with my old Dell laptop.
- mdwrigh2 9y agoThat's not necessarily because you could do it in a single frame; a lot of the old touch controllers would maintain high levels of hysteresis as a really crude technique to mitigate low SNR. Couple that with a fairly dumb implementation of pointer tracking and you end up easily fooling touchpad into thinking the two pointers are the same. Note also that this is a much rarer and more user-friendly failure scenario than choosing to have the software err in the other direction (erroneously splitting a moving finger into two separate pointers, one of which may look like a tap gesture). Source: I occasionally work with touchscreens, many of which experienced the same issue in early devices.