The Source engine is a 3D game engine developed by Valve Corporation. Its unique features include a large degree of modularity and flexibility, an artist-driven, shader-based renderer, accurate lip sync and facial expression technology, and a powerful, efficient and completely network-enabled physics system.
This tutorial will show you how to make a func_physbox tangle on an axis
Posted by Angry_Rabbit on Feb 16th, 2011
Now add the phys_motor from the entety tab and place it so that is in front of the axis that you will drag now drag the origin of the phys_motor horizontal that is going to be the axis it self the origin is the small circle in the middle of the func_motor if its not there press the icon left to the rendering button on the upper tab
Now go in to the phys_motors propeties andmake the attached objeckt rotate_door (or how ever you called your objeckt) and make sure that you did not added a rotacion speed
You can apply this for a lots of other stuff and you can go messy whit tham like add some brakabels and some exploding barrels or make something realy creative whit it like combine ing them whit trains and other stuff oh and if you make a map and whit something like thiss in it link the this tutorial to it so other people can learn this too because its EASY.