[chronojump] Fixed displacementPerson on ROTARYAXISINERTIAL

[Xavier de Blas <xaviblas src gnome org>]

commit 6b5b4bf9cde60ddac6fb20001331e56b8f24521a
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon Feb 16 12:15:23 2015 +0100

    Fixed displacementPerson on ROTARYAXISINERTIAL

 encoder/util.R |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/encoder/util.R b/encoder/util.R
index a373938..40b492b 100644
--- a/encoder/util.R
+++ b/encoder/util.R
@@ -769,8 +769,7 @@ fixDisplacementInertial <- function(displacement, encoderConfigurationName, diam
                ticksRotaryEncoder = 200 #our rotary axis encoder send 200 ticks by turn
                #angle in radians
                angle = cumsum(displacementMeters * 1000) * 2 * pi / ticksRotaryEncoder
-               #abs makes it change direction when signal is lower than initial position (0)
-               position = abs(angle * diameterMeters / 2)
+               position = angle * diameterMeters / 2
                position = position * 1000      #m -> mm
                #this is to make "inverted cumsum"
                displacement = c(0,diff(position)) #this displacement is going to be used now