From ca70bd04e678437dac2158118a42525913b065b5 Mon Sep 17 00:00:00 2001
From: NathanSweet <nathan.sweet@gmail.com>
Date: Sun, 14 Feb 2016 19:45:10 +0100
Subject: [PATCH] Fixed single bone IK when a parent is scaled negatively.

---
 .../src/com/esotericsoftware/spine/IkConstraint.java             | 1 +
 1 file changed, 1 insertion(+)

diff --git a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java
index 00ad082fe..12e4dcbc4 100644
--- a/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java
+++ b/spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/IkConstraint.java
@@ -125,6 +125,7 @@ public class IkConstraint implements Updatable {
 		float parentRotation = bone.parent == null ? 0 : bone.parent.getWorldRotationX();
 		float rotation = bone.rotation;
 		float rotationIK = atan2(targetY - bone.worldY, targetX - bone.worldX) * radDeg - parentRotation;
+		if (bone.worldSignX != bone.worldSignY) rotationIK = 360 - rotationIK;
 		if (rotationIK > 180)
 			rotationIK -= 360;
 		else if (rotationIK < -180) rotationIK += 360;