From ee5e5ff8cee7bedb50484fcdcbf73cf9cee0d93b Mon Sep 17 00:00:00 2001
From: Dander7BD <dander.1981@gmail.com>
Date: Tue, 14 Jan 2014 09:12:37 +0100
Subject: [PATCH] linear collision response fix

moved improved version of Robin's implementation
---
 .../Implementation/PhysicsAPI_Impl.cpp          | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Code/GamePhysics/Implementation/PhysicsAPI_Impl.cpp b/Code/GamePhysics/Implementation/PhysicsAPI_Impl.cpp
index 0d0d31b2..c61f9ce9 100644
--- a/Code/GamePhysics/Implementation/PhysicsAPI_Impl.cpp
+++ b/Code/GamePhysics/Implementation/PhysicsAPI_Impl.cpp
@@ -38,6 +38,23 @@ namespace
 					Float protoG_Magnitude = protoG.Dot( normal ),
 						  deuterG_Magnitude = deuterG.Dot( normal );
 
+					// if they are not relatively moving towards eachother, there is no collision
+					Float deltaPos = normal.Dot( deuterState.GetCenterPosition() - protoState.GetCenterPosition() );
+					if( deltaPos < 0.0f )
+					{
+						if( protoG_Magnitude >= deuterG_Magnitude )
+						{
+							break;
+						}
+					}
+					else if( deltaPos > 0.0f )
+					{
+						if( protoG_Magnitude <= deuterG_Magnitude )
+						{
+							break;
+						}
+					}
+
 					// bounce
 					Float4 bounceD = normal * -Formula::CollisionResponse::Bounce( deuterState.GetRestitutionCoeff(),
 																				   deuterState.GetMass(), deuterG_Magnitude,