View source for Creating a working Crane in Half-Life 2

{{Cleanup|type=tutorial}}
Creating a working crane as seen in Half Life 2.[[File:Hl2coastcrane.jpg|thumb|right|300px|The player operated crane as it appears in the "Highway 17" chapter of Half-Life 2.]]

==Overview==
In the chapter Highway 17, the player has to use a crane to knock down a bridge and move their car to continue.  Other metal objects like cargo containers and barrels can also be picked up with the magnet and moved.  The crane is simple, but for begining mappers, making one can be a challenge.  We will be using the entities [[prop_vehicle_crane]] and a [[phys_magnet]].

==Tutorial==
Before we build a crane, build a map. Keep in mind that if the crane is the highest point, you will need to give the crane about 100 units of extra room, and give plenty of room around the crane so the player can use it.  
Once that is done, add in a [[prop_static]] and set the world model to '''models/crane/crane_frame.mdl''', then add another prop_static and set the world model to '''models/crane/crane_frame_interior.mdl''' and put that inside the frame.  Next, create a [[prop_vehicle_crane]] and set the world model to '''models/crane/crane_docks.mdl''', name it ''crane1'', and set that on the frame.  
Now, create a [[phys_magnet]], set its name to ''magnet1'', set the world model to '''models/props_wasteland/cranemagnet01a.mdl''', set its mass scale to 500 (This stops it from swinging wildly in the air. Change it higher to lower its swing more,) and finally, position it under the crane's boom arm near the tip.  

If you're wondering, the lines will automatically be set up and the magnet will be put in the default position when the map loads.  Finally, open up the properties for ''crane1'' and set magnet entity to ''magnet 1''.

==Finishing Up==
To finish up the crane, add a platform on the frame so the player can walk to the controls.  Don't forget to put a ladder so the player can get up.  You don't have to use the crane frame, and you can mount it onto any brush or prop. So be creative. Add a few crates, maybe a jeep, and you are done!

==See also==
* [[prop_vehicle_crane]]
* [[phys_magnet]]
* [[npc_cranedriver]] ''For AI driven cranes''
[[Category:Tutorials]]