diff options
Diffstat (limited to 'libs/ui/Input.cpp')
| -rw-r--r-- | libs/ui/Input.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libs/ui/Input.cpp b/libs/ui/Input.cpp index bbe579e..a95f432 100644 --- a/libs/ui/Input.cpp +++ b/libs/ui/Input.cpp @@ -832,6 +832,7 @@ bool VelocityTracker::getVelocity(uint32_t id, float* outVx, float* outVy) const const Position& oldestPosition = oldestMovement.positions[oldestMovement.idBits.getIndexOfBit(id)]; nsecs_t lastDuration = 0; + while (numTouches-- > 1) { if (++index == HISTORY_SIZE) { index = 0; @@ -858,6 +859,14 @@ bool VelocityTracker::getVelocity(uint32_t id, float* outVx, float* outVy) const // Make sure we used at least one sample. if (samplesUsed != 0) { + // Scale the velocity linearly if the window of samples is small. + nsecs_t totalDuration = newestMovement.eventTime - oldestMovement.eventTime; + if (totalDuration < MIN_WINDOW) { + float scale = float(totalDuration) / float(MIN_WINDOW); + accumVx *= scale; + accumVy *= scale; + } + *outVx = accumVx; *outVy = accumVy; return true; |