Func rotating

Note: This entity did not rotate visually until the 19/12/2018 patch, due to bugged implementation of the Client-side rotation spawnflag.

Bug:The maximum degrees this angle can turn is 360000 degrees, at which it stops rotating.  [todo tested in ?]

Fix:This can be remedied by scripting the entity to pause rotating for a short period of time.

Entity Description

A visual guide showing the axis in each viewport (Click to enlarge)

It is used to create rotating brushes. Compare with func_door_rotating.

Friction Explanation & Formula

Fan friction may be a little tricky to understand. Below is an explanation of how it works.

If Hammer has the fanfriction key set to 0 and the game spawns the entity, code sets it to 1 so it doesn't divide by zero.

Friction = fanfriction key / 100

---

Key	Hammer Value	Code Value
fanfriction	100	1
fanfriction	50	0.5
fanfriction	0/1	0.01

---

Note: These formulas get called every 0.1 seconds.

Purpose: Think function: Accelerates a func_rotating to a higher angular velocity.

new_speed = fabs( current_speed ) + 0.2 * maxspeed * fanfriction;

Purpose: Decelerates the rotator from a higher speed to a lower one.

new_speed = fabs( current_speed ) - 0.1 * maxspeed * fanfriction;

---

Conclusion:

• A higher fanfriction value will accelerate/deaccelerate faster.
• A lower fanfriction value will accelerate/deaccelerate slower.

Keyvalues

Max Rotation Speed (maxspeed) <integer>

The maximum rotation speed of the brushes, in degrees per second. Seems to be limited to a number around 2000, after which the rotational speed ignores the last remaining digits (e.g., 2500=250).

Friction (0 - 100%) (fanfriction) <integer>

The amount of rotational friction. Value must be between 0 and 100 %. The lower the friction is, the slower it spins up and spins down. This is the opposite of how it would work in real life.

Rotating sound WAV (message) <sound>

Sound to play while rotating.

Volume (10 = loudest) (volume) <integer>

The volume of the rotation sound.

Minimum Light Level (_minlight) <string>

The minimum level of ambient light that hits this brush.

Blocking Damage (dmg) <integer>

Damage done to any entity that blocks the rotation, per frame.

Solid Type (solidbsp) <choices>

Brush solidity type

• 0 : VPhysics
• 1 : BSP

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Render in Fast Reflections (drawinfastreflection) <boolean> (in all games since )

If enabled, this entity will render in fast water reflections (i.e. when a water material specifies $reflectonlymarkedentities) and in the world impostor pass.

Flags

Start ON : [1]

Reverse Direction : [2]

X Axis : [4]

If enabled, the entity will spin at the X Axis.

Y Axis : [8]

If enabled, the entity spin at the Y Axis.

Acc/Dcc : [16]

If enabled, the entity will accelerate and decelerate from maximum speed based on the Friction property.

Client-side Rotation : [16] (only in )

Intended to simulate the entity entirely on the client.

Fan Pain : [32]

With this enabled, the player will be hurt when coming into contact with the brush.

Not Solid : [64]

Small Sound Radius : [128]

Use ATTN_IDLE (60dB).

Medium Sound Radius : [256]

Use ATTN_STATIC (~67dB).

Large Sound Radius : [512]

Use ATTN_NORM (~75dB). If the other two options are unset, this is used.

Client-side Animation : [1024] (in all games since )

Inputs

SetSpeed <floatRedirectInput/float>

Set the speed as a ratio of the specified Max Rotation Speed, where 0 is stopped and 1 is the Max Rotation Speed. Negative values rotate backwards.

Start

Start the rotator rotating.

Stop

Stop the rotator from rotating.

StopAtStartPos

Stop the rotator from rotating when it gets around to the start position again (on its rotation axis). If the speed is greater than 100 degrees per second, slows down to 100 degrees per second and spins for one extra revolution before stopping.

StartForward

Start the rotator rotating forward at maximum speed.

StartBackward

Start the rotator rotating backward at maximum speed.

Toggle

Toggle the rotator between rotating and not rotating.

Reverse

Reverse the direction of rotation of the rotator, preserving the current speed.

SnapToStartPos  (in all games since )

Snap to the initial position and stop moving.

GetSpeed  (in all games since )

Causes the func_rotating to fire its OnGetSpeed output with its current speed.

SetDamageFilter <targetnameRedirectInput/string>

Sets a filter for this entity for when it receives damage.

EnableDamageForces

Allows the entity to be pushed by damage done to it (usually force amount correlates with the damage done).

DisableDamageForces

Prevents the entity from being pushed by damage done to it.

Todo: move/mention at proper place

Outputs

OnGetSpeed <integerRedirectInput/integer> (in all games since )

Fired when the GetSpeed input is called. The current speed of the func_rotating is passed with this output.

See Also

• func_door_rotating
• func_platrot
• func_rot_button
• momentary_rot_button