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filter: perform speed computations with doubles

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Converting to integer before the sqrt calculation can cause loss of
motion at low speed.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Derek Foreman 2014-10-30 16:34:14 -05:00 • committed by Peter Hutterer
parent de9cff09dc
commit 58e0fe270d
1 changed files with 2 additions and 2 deletions
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4
src/filter.c
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@ -139,8 +139,8 @@ tracker_by_offset(struct pointer_accelerator *accel, unsigned int offset)
static double
calculate_tracker_velocity(struct pointer_tracker *tracker, uint64_t time)
{
int dx;
int dy;
double dx;
double dy;
double distance;
dx = tracker->dx;