View source for Creating BTS Fans

{{DISPLAYTITLE: Portal BTS - Tutorial - Fans}}{{back | Portal Level Creation}}{{Tutorial Skill Level | skill=2}}
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==Introduction==
This page will show you how to create fans.

==The Base==

Create an <code>192w*192l*128h</code>[[Hammer_Arch_Properties|Arch]] with the following properties:
[[File:BTS Fan Arch.PNG|thumb|left|700px|Arch Properties]]
{{clr}}

Then, use the [[Clipping Tool]] to cut this exact shape:
[[File:Bts fan clip.png|thumb|left|200px|Clipped Brush]]
{{clr}}
Turn your shape into a [[func_detail]] and put nodraw on all of sides except for below. Just make the side brushes 112 units high.

[[File:BTS Fan Shape.PNG|thumb|right|200px|The Shape (Dev textures are placed so it's easier to see)]]

Make the bottom parts of each brush <code>metal/metalwall_bts_006a</code>
===Details===

[[File:BTS Fan Details.PNG|thumb|right|200px|Fan Details Alignment]]

Create a <code>32w*32l*16h</code> cylinder with 12 sides with the nodraw texture. Texture every side except for the top with <code>citadel_metalwall074a</code>

Create 2 <code>4w*52l*12h</code> blocks with the nodraw texture. Texture every side except for the top with <code>citadel_metalwall074a</code>. Center this brush with the cylinder and then copy and paste this brush on the other side. Rotate this brush so it fits on the other sides as well.

Select all of those brushes and then make it a <code>func_detail</code>.

{{note| You can turn these brushes to a <code>[[func_illusionary]]</code> and disable the shadows for brighter lighting if you need it.}}

Align the brushes, the image on the right will help you.

===Extra Details===

[[File:BTS Details Extra.PNG|thumb|right|200px|Extra Fan Details]]

Create a <code>128w*128l*8h</code> arch with 24 sides with nodraw.

Enter the following Properties:

* Wall Width: 4

* Number of Sides: 24

* Arc: 360

Now create the brush.

Make this a <code>func_detail</code>

Texture everyside except for the top part and the unseeable with <code>citadel_metalwall074a</code>.

Align the details, the image on the right should help you.

===The Grate===

Create a <code>120w*120l*2h</code> cylinder with 24 sides with the nodraw texture.

Make this brush a <code>func_detail</code>
The texture of the bottom part of the brush should be <code>metal/metalgrate013a2</code>

Select the texture tool and

*Set the texture scale of X and Y to 0.125

*Rotate the texture by 45 degrees.

===The Fan===
Create a <code>[[prop_dynamic]]</code> entity and enter the following properties

{| class=standard-table
!  Property Name || Value
|- 
| Parent || rotating_fan1
|-
| Pitch Yaw Roll || -90 0 0
|-
| World Model || models/props_bts/fan01_small.mdl
|-
| Disable Shadows || Yes
|}

Position the fan just below the details in the inside part.

Create a <code>32w*32l*16h</code> cylinder with 12 sides with the <code>invisible</code> texture

Position the brush right below the center of the detail
Tie it to a [[func_rotating]] and enter he following properties
{| class=standard-table
!  Property Name || Value
|- 
| Name || rotating_fan1
|}

Under Flags, check <code>Start On</code> and <code>Not Solid</code>

==Orange Colored Fan==

[[File:Orange BTS Fan.PNG|thumb|right|400px|Orange Fan]]

If you want your fan to be orange colored, make the ceiling of the fan <code>lights/light_orange001</code> and set the texture scale values to 50 so the brush doesn't emit light.
Select all the walls and change their texture to <code>metal/metalwall_bts_006b_gradient</code>

Create a [[light_spot]] entity and position this very close to the ceiling.

Enter the following properties:

{| class=standard-table
!  Property Name || Value
|- 
| Pitch Yaw Roll || -90 0 0
|- 
| Brightness || 242 91 0 600
|- 
| BrightnessScaleHDR || .5
|- 
| Constant || 200000
|- 
| Inner Angle || 15
|- 
| Outer Angle || 30
|-
| Pitch || -90
|}

==White Colored Fan==
[[File:White BTS Fan.PNG|thumb|right|400px|White Fan]]
If you want your fan to be white colored, make the ceiling of the fan <code>lights/white008</code> and set the texture scale values to 50 so the brush doesn't emit light.

Select all the walls and change their texture to <code>metal/metalwall_bts_006a_gradient</code>.

Create a [[light_spot]] entity and position this very close to the ceiling.

Enter the following properties:

{| class=standard-table
!  Property Name || Value
|- 
| Pitch Yaw Roll || -90 0 0
|- 
| Brightness || 250 240 205 100
|- 
| BrightnessScaleHDR || .5
|- 
| Constant || 500000
|- 
| Inner Angle || 30
|- 
| Outer Angle || 45
|-
| Pitch || -90
|}

==Large Fans==
{{todo| Add large fans seen only in testchmb_a_15}}

==Extra Notes==
* Not all fans rotate
* Some fan speeds are different
* The fastest moving fan is in escape_00, right before you encounter the [[Creating_Portal_Piston_Types#Separator_Pistons|Separator Pistons]]. Its <code>Max Rotation Speed</code> is set to 200.
* The slowest moving fan is in escape_02 in the hallway where turret claws are deployed. Its <code>Max Rotation Speed</code> is set to 5.
* Also in escape_02, there are fans that emit no light

== See also ==

* [[BTS Light Sources | Light Sources]]

* [[Portal Level Creation]]

[[Category:Portal]]
[[Category:Level Design]]
[[Category:Tutorials]]