From 65f53a491f9a95d4e6cb7fe69648a6a759550a5c Mon Sep 17 00:00:00 2001
From: Bart van Strien <bart.bes+projects@gmail.com>
Date: Thu, 14 Jul 2016 16:39:29 +0200
Subject: [PATCH] Make MouseJoint:getBodies() return only one body (fixes
 #1179)

Override Joint's Body getters in MouseJoint, to make the second (user-supplied) body the first body returned, and return nil for the second (internal) body
---
 changes.txt                              |  1 +
 src/modules/physics/box2d/Joint.h        |  4 ++--
 src/modules/physics/box2d/MouseJoint.cpp | 10 ++++++++++
 src/modules/physics/box2d/MouseJoint.h   |  3 +++
 4 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/changes.txt b/changes.txt
index 9f7684f8d..4f248a132 100644
--- a/changes.txt
+++ b/changes.txt
@@ -21,6 +21,7 @@ Released: N/A
   * Fixed the default shader improperly applying gamma correction to per-vertex colors when gamma correction is requested but not supported on OpenGL ES.
   * Fixed text coloring breaking because of an empty string.
   * Fixed large burst of particles when dramatically increasing the emission rate of a ParticleSystem.
+  * Fixed MouseJoint:getBodies unconditionally erroring.
 
   * Improved performance of Channel methods by roughly 2x in many cases.
   
diff --git a/src/modules/physics/box2d/Joint.h b/src/modules/physics/box2d/Joint.h
index dd6be8e1c..258234985 100644
--- a/src/modules/physics/box2d/Joint.h
+++ b/src/modules/physics/box2d/Joint.h
@@ -84,8 +84,8 @@ public:
 	 **/
 	Type getType() const;
 
-	Body *getBodyA() const;
-	Body *getBodyB() const;
+	virtual Body *getBodyA() const;
+	virtual Body *getBodyB() const;
 
 	/**
 	 * Gets the anchor positions of the Joint in world
diff --git a/src/modules/physics/box2d/MouseJoint.cpp b/src/modules/physics/box2d/MouseJoint.cpp
index b037a9c79..08e41d35e 100644
--- a/src/modules/physics/box2d/MouseJoint.cpp
+++ b/src/modules/physics/box2d/MouseJoint.cpp
@@ -91,6 +91,16 @@ float MouseJoint::getDampingRatio() const
 	return joint->GetDampingRatio();
 }
 
+Body *MouseJoint::getBodyA() const
+{
+	return Joint::getBodyB();
+}
+
+Body *MouseJoint::getBodyB() const
+{
+	return nullptr;
+}
+
 } // box2d
 } // physics
 } // love
diff --git a/src/modules/physics/box2d/MouseJoint.h b/src/modules/physics/box2d/MouseJoint.h
index 803bf4b94..bf365e8d2 100644
--- a/src/modules/physics/box2d/MouseJoint.h
+++ b/src/modules/physics/box2d/MouseJoint.h
@@ -95,6 +95,9 @@ public:
 	 **/
 	float getDampingRatio() const;
 
+	virtual Body *getBodyA() const;
+	virtual Body *getBodyB() const;
+
 private:
 	// The Box2D MouseJoint object.
 	b2MouseJoint *joint;