From: Derek Foreman <derekf@osg.samsung.com>
Date: Thu, 30 Oct 2014 21:34:14 +0000 (-0500)
Subject: filter: perform speed computations with doubles
X-Git-Tag: 0.7.0~88
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=58e0fe270d9f3731f18ce3a7618a69a5112029b9;p=platform%2Fupstream%2Flibinput.git

filter: perform speed computations with doubles

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>
---

diff --git a/src/filter.c b/src/filter.c
index 205cd03b..afb87ef2 100644
--- a/src/filter.c
+++ b/src/filter.c
@@ -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;