From a3baa099f9d93715df6b07e29d08fa2708ddabf2 Mon Sep 17 00:00:00 2001
From: Neo <nihgwu@live.com>
Date: Fri, 23 Jun 2017 11:26:54 +0800
Subject: [PATCH] Fix typo -- movedDistance moveX, moveY -> dy/dx (#1824)

---
 packages/react-navigation/src/views/CardStack.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/react-navigation/src/views/CardStack.js b/packages/react-navigation/src/views/CardStack.js
index 9d589c1f..8f16ae1b 100644
--- a/packages/react-navigation/src/views/CardStack.js
+++ b/packages/react-navigation/src/views/CardStack.js
@@ -321,10 +321,10 @@ class CardStack extends Component {
         const axisDistance = isVertical
           ? layout.height.__getValue()
           : layout.width.__getValue();
-        const movedDistance = gesture[isVertical ? 'moveY' : 'moveX'];
-        const defaultVelocity = axisDistance / ANIMATION_DURATION;
+        const movedDistance = gesture[isVertical ? 'dy' : 'dx'];
         const gestureVelocity = gesture[isVertical ? 'vy' : 'vx'];
-        const velocity = Math.max(gestureVelocity, defaultVelocity);
+        const defaultVelocity = axisDistance / ANIMATION_DURATION;
+        const velocity = Math.max(Math.abs(gestureVelocity), defaultVelocity);
         const resetDuration = movedDistance / velocity;
         const goBackDuration = (axisDistance - movedDistance) / velocity;