From 088dddcd454d58efc2545a78d4f7a126b9c7e4c0 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Sun, 6 Jan 2019 00:04:54 -0500
Subject: Fix normalization of game controller axis values.

* chickadee.scm (controller-axis): Fix math so that axis values are
actually in the range [0, 1].
---
 chickadee.scm | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'chickadee.scm')

diff --git a/chickadee.scm b/chickadee.scm
index 478cf6c..e14f924 100644
--- a/chickadee.scm
+++ b/chickadee.scm
@@ -105,9 +105,8 @@
   "Return a floating point value in the range [-1, 1] corresponding to
 how much AXIS is being pushed on CONTROLLER.  0 is returned if AXIS is
 not being pushed at all."
-  (- (/ (sdl2:game-controller-axis controller axis)
-        32768.0)
-     0.5))
+  (/ (sdl2:game-controller-axis controller axis)
+     32768.0))
 
 (define current-window (make-parameter #f))
 
-- 
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