Creating a rotating portalgun

Introduction

So, we are going to create rotating stand with portalgun shooting portals.

An example map is available for download here.

Prepare models

You will need:

• prop_dynamic, world model: models/props/pedestal_base_reference.mdl, name: stand_bottom_model Set the "disableshadows" keyvalue to 1.
  
  
• prop_dynamic, world model: models/props/pedestal_center_reference.mdl, name: stand_top_model

Prepare brushes

Create:

• 32 x 32 block, height 4, using the tools/nodraw texture.

• 4 x 32 block, height 55, also using the nodraw texture.

Moving

Illustration 1

Move stand_bottom_model where you want to have the stand. The small doors on the bottom of the model need to be just underground.

Now move stand_top_model above stand_bottom_model as in the illustration. Center the first brush that measured 32x32 with stand_top_model. Set its Z axis (height) to about half of stand_top_model. Now move the second brush as it is in the picture.

Brush Entities

Select the 32x32 brush and tie it to a func_rotating entity.

Property Name	Value
Name	stand_func_rotating
Max Rotation Speed	30

Under the Flags tab, uncheck Start ON.

Tie the second brush to a func_door.

Property Name	Value
Name	stand_func_door
Speed	25
Move direction:	90 0 0

PortalGun

Create a new entity, a weapon_portalgun and name it weapon_portalgun. Move it exactly on top of stand_top_model. The portalgun should face left when you’re looking at stand_top_model in the direction of the blue display.

Logic

Make entity logic_timer named timer_stand and set interval to 5 sec. Make sure that initial state is on. Now go to outputs and write:

	My Output	Target Entity	Target Input	Parameter	Delay	Only Once
	OnTimer	stand_func_rotating	Start	<none>	0.00	No
	OnTimer	stand_func_rotating	Stop	<none>	3.00	No
	OnTimer	weapon_portalgun	FirePortal1	<none>	3.00	No

Create a new output:

	My Output	Target Entity	Target Input	Parameter	Delay	Only Once
	OnFullyOpen	stand_bottom_model	SetAnimation	close	0.00	No

Now, we will make outputs of stand_bottom_model:

	My Output	Target Entity	Target Input	Parameter	Delay	Only Once
	OnAnimationDone	stand_bottom_model	SetAnimation	inactive	0.00	No

And few outputs for weapon_portalgun:

	My Output	Target Entity	Target Input	Parameter	Delay	Only Once
	OnPlayerPickup	timer_stand	Kill		0.00	No
	OnPlayerPickup	stand_top_model	SetParent	stand_func_door	0.00	No
	OnPlayerPickup	stand_func_door	Open		0.80	No

Parents and the Hole

All moved, just for illustration of hole.

Now, just set parent of weapon_portalgun and stand_top_model to stand_func_rotating. When your done, make hole under stand_bottom_models overground part.

End

You may create prop_static with model of models/props/autoportal_frame/autoportal_frame.mdl for framing autofired portals, just move them to wall and rotate.