UserWiki:DavidJCobb/Forge Gate

This article is a tutorial, originally created by DavidJCobb, on how to create an operable gate in Halo 3's Forge. The method was performed in the Multiplayer map Foundry, so some parts may be specific to that level.

 I have a map with two gates on my File Share. There is also a saved Film showing how to create a gate that is closed by default. However, my Bungie Pro subscription has run out... So it'd be great if someone would use Render-to-Video on the film, so I can free up space on my tiny File Share by moving the vid to YouTube -- which'd allow me to add it to this article, as well.
 * [[Image:DavidJCobb_Emblem.svg|16px]] DavidJCobb  00:24, 2 July 2009 (UTC)

Instructions
The first thing you need to do is establish a framework. You can do this using just a Wall and a Wall, Corner. You'll want to place them such that the 'Wall acts as, well, a wall, and the Wall, Corner acts as both a wall and a ceiling. The result should be a kind of enclosure, a tube of sorts.

Next, you need to place two Dumpsters inside the enclosure, back-to-back, such that the curved sides are facing towards the nearest openings. Do note that you may need to fine-tune the placement of the Dumpsters later, during testing.

The next thing you need to do is block off the bottom halves of each opening. You can do this using Sign A and Sign B. Place them sideways, one in front of each opening. The result should be that a player has to jump to enter the enclosure, and they need to jump to exit it.

From here, set the Dumpsters' Place at Start to No. Start a new round, and quickly insert a Grav Lift in the center of the enclosure, on the floor. It ought to be roughly between each Dumpster's spawn point. Wait for the Dumpster''s to spawn in, and then change their Place at Start back to Yes. You'll find that the Grav Lift has raised the Dumpsters, preventing anyone from entering the enclosure.

Next, place two or three Fusion Coils right against one of the enclosure's sides -- a wall, not an opening! Set the Fusion Coils to Instant Respawn.

The only (required) thing left to do now is test it. Blow up the Fusion Coils. If they're close enough, the Grav Lift should be destroyed. If it isn't, blow up the Fusion Coils one more time. If the Lift is still functioning after that, then move the Fusion Coils to the other wall and try again. If that still doesn't work, then repeat Step 4, moving the Grav Lift a little closer to a wall.

If the Grav Lift was destroyed by the Fusion Coil blast, you should find that the Dumpsters have lowered, allowing you to jump into the gate and walk straight through it. However, it's possible that one of the Dumpsters might not have landed properly, and may be stuck, blocking entry -- if you look closely, you can actually see this in the above screenshot. If that's the case, then simply enter Edit Mode and move the Dumpster a bit until it falls -- and hurry, because you don't want to be moving it around after the Grav Lift respawns.

Open By Default
To make the gate open by default (so that blowing up the Fusion Coils closes it), simply float the Signs in the air. To do this, place two extra Dumpsters, each going where a Sign should be. Then place the Signs sideways on top of the Dumpsters. After that, delete the extra Dumpsters.