Creating An Auto Portal

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Portal Level Creation


This guide will show you how to create an auto portal, this is a very simple process and should be done in no time.

Auto Portal on the wall to walk through

The Frame

Create a prop_static entity and change it's world model to models/props/autoportal_frame/autoportal_frame.mdl

What the auto Portal Frame should look like.

The Portal

Create a prop_portal entity and name it portal. Set the Property "Start Activated" to Inactive. Set the "Portal Number" property to which portal you are using.

Note:Portal 1 is the Blue Portal and Portal 2 is the Orange/Red Portal.


Position the prop_portal2 units above the bottom of the portal frame (prop_static entity). Now center it based off the "bars" of the portal frame using the "top (x/y) view".

Warning: If placed improperly, the portal will be inside the wall making the portal useless although the edges of the effects show.

What the positioning of the portal should look like

Portal Spawn Sound

Create an ambient_generic entity and name it to sound_portal_spawn and enter the following properties:

Property Name Value
Name sound_portal_spawn
Sound Name Portal.open_blue or Portal.open_red
Max Audible Distance 333
Source Entity Name portal

Go to flags have only "Is NOT Looped" checked

Portal Spawn Shake

Create an env_shake entity and name it to shake_portal_spawn. Put this entity fairly close to where the player triggers it if the player is near by the portal. There isn't a specific spot to put it at.

Optional (Recommended)

If you want to make this a prefab, I suggest following these steps to make things easier...

Create a logic_relay and name it to relay_portal_spawn

Add the outputs:

  My Output Target Entity Target Input Parameter Delay Only Once
Io11.png OnTrigger portal SetActivatedState 1 0.00 No
Io11.png OnTrigger shake_portal_spawn StartShake 0.00 No
Io11.png OnTrigger sound_portal_spawn PlaySound 0.00 No

Auto Portal for ceilings, floors, or Flinging

I highly suggest you read Auto Portal on the wall to walk through before you enter this part.


Aligning the portal

Do your best to perfectly center the portal with the auto-portal frame.

Warning: If placed improperly, the portal will be inside the floor making the portal useless although the edges of the effects show.

What the the portal should look like when centered


Rotating

Simply rotate the entire portal and make further corrections afterwards.

Note: Rotating the prop_portalwill make the portal look like it is in the same position in the hammer editor, you will have to rely on which direction the origin (yellow line in 2d view) is facing
An unrotated prop_portal
A rotated prop_portal (would be on the ceiling)

Implementation

Make the Portal spawn

Make some entity trigger the relay_portal_spawn

For example with trigger_once:

  My Output Target Entity Target Input Parameter Delay Only Once
Io11.png OnTrigger relay_portal_spawn Trigger 0.00 No

Make the Portal close

To make the portal close, you set the active state to 0,

here's in example with trigger_once:

  My Output Target Entity Target Input Parameter Delay Only Once
Io11.png OnTrigger portal SetActivatedState 0 0.00 No

See Also