Fix for wrong calculation of velocity
Fix for wrong calculation of velocity

The velocity, which is the global cameraDirection variable was
constantly changed. Gravity was added to it over and over again.
This doesn't solve this -
http://www.html5gamedevs.com/topic/17708-collision-issue-with-bounce/ ,
but solves a problem with calculating the correct velocity currently
used.

Temechon/Babylon.js,NicolasBuecher/Babylon.js,NicolasBuecher/Babylon.js,jbousquie/Babylon.js,jbousquie/Babylon.js,RaananW/Babylon.js,sebavan/Babylon.js,Hersir88/Babylon.js,abow/Babylon.js,Temechon/Babylon.js,Hersir88/Babylon.js,abow/Babylon.js,Kesshi/Babylon.js,NicolasBuecher/Babylon.js,RaananW/Babylon.js,jbousquie/Babylon.js,abow/Babylon.js,RaananW/Babylon.js,sebavan/Babylon.js,Hersir88/Babylon.js,Temechon/Babylon.js,Kesshi/Babylon.js,Kesshi/Babylon.js,BabylonJS/Babylon.js,BabylonJS/Babylon.js,sebavan/Babylon.js,BabylonJS/Babylon.js