查看“Ventilator”的源代码

{{Languages|zh|风扇}}
{{Object
  | name = Ventilator
  | img = [[File:Ordinary modul18.jpg|190px]]
  | desc = ventilator without base and "little yellow dot" (body)
  | modul = P_Modul_18
  | levels = all levels except level 1
}}
'''Ventilator''', also known as a '''fan''', ventilator (literal English translation), is one of the common [[objects]]. The ventilator is visually represented as two blades equipped with an upward dynamic "wind", which can provide an upward force for the [[player ball]] within its range of action. This force (of 1 ventilator) can lift a [[paper ball]] with a mass of 0.2 tons.

== Appearance and function ==

The model of the ventilator in [[Virtools]] (after removing the alignment base, that is, the effective range) is 16.36 meters (3.272 units) high and 5 meters (1 unit) long and wide.

The forces of multiple ventilatons can be superimposed, creating stacked ventilators or ''pusfans''. A double ventilator will life a paper ball faster than a single ventilator. A 6-pusfan can slowly lift the [[wooden ball]] with a mass of 1.9 tons (when increasing the number of ventilator to around 10, the rising speed is similar to the rising speed provided by 1 ventilator to a paper ball), and a 32-pusfan can lift a [[stone ball]] with a mass of 10 tons. The force of the pusfans on the paper ball will also increase accordingly, so that it can produce the effect of "flying into the sky".

== Physical characteristics ==

The essence of the ventilator's ability to lift the player's ball is that it gives the player's ball a vertical upward and constant lift within a certain range (but the forces of multiple ventilator can be superimposed). However, the range of action for granting lift is not the same as the judgment range for canceling lift.

The ventilator \doesn't contain any structures that need to be physicalized. When the player ball's collision box is in contact with the <code>P_Modul_18_Kollisionsquader</code> in the ventilator, it will experience a constant force of 0.1 units along the positive y-axis; when the two are no longer in contact, the force disappears. Because the magnitude of this force is independent of the size of their intersecting volumes, the ventilator does not work on the principle of buoyancy as previously widely believed.

== Ventilator Base ==

The ventilator is usually accompanied by a base [[decoration]]. There are two types of pedestals in the [[original levels]], but there are occasional ventilators without pedestals.

Generally speaking, ordinary bases are generally accepted by custom level players; the small yellow dots in the level or ventilators without bases (especially the latter) are more difficult to pass, and are generally regarded as not meeting the standard (unless there is a need for flexibility as a special case of regulation).

=== Ordinary Base ===

[[File:Ventilator_base-level2.jpg|150px|thumb|right|Ordinary base]]
The common base of the ventilator, which visually appears as a flat [[surface]] with a "pedestal" embedded in it. This is the most common and widely used pavement for ventilator bases. The top texture can be modified to match the different road surfaces it is connected to.

=== Small yellow dot ===

The "small yellow dot" also exists in the center of the ordinary ventilator base, but in the original level, only level 4 section 4 has a small yellow dot that appears alone.

When [[mapping]], the small yellow dot needs to be classified into the road group.

=== Without base ===

There is a baseless ventilator in the level 4 section 4 and level 12 section 4, which is speculated to be for the convenience of the player's ball passing through. However, this is not recommended in general, since it can be difficult to determine the location of a ventilator without a supporting base.

== Did you know ==

* Due to inertia, the ball will leave the top of the ventilator force and continue to rise for a short distance when it rises from the bottom of the ventilator to the top. This phenomenon is widely used in [[shortcuts]] and even some [[custom levels]].
* The "blade" of the ventilator has no hitbox, and the ball can pass directly through it.
* The force of the ventilator is only effective for player balls, which means [[prop ball]] cannot be lifted.
* The ventilator has a loud "blow" [[sound effect]], and pressing Esc to enter the [[pause menu]] does not affect this sound effect.
* After the player leaves the [[section]] where the ventilator is located, sometimes the object will not disappear, and there will still be two stalled blades; but sometimes it will disappear like other objects. Just like the [[transformer]] activating in sections it doesn't belong to, it's unclear why the ventilator blades disappear or not.
* By moving along the "wind direction" of the horizontal ventilator, the [[Floating Ball]] glitch of paper balls, wooden balls, and even stone balls (the latter two need stacked ventilators and stone balls are difficult to control) can be produced, making it can continue to rise after being separated from the ventilator. This effect will disappear when the ball is back above the original ventilator or (sometimes) farther away. This can result in a ''[[non possum mori]]''. <br>This vulnerability is applied to custom maps, but due to excessive use, some devices with lower configuration will produce other vulnerabilities, and some players are concerned about these two map experiences being not good.
* The ventilator can be scaled from any axis, and its model appearance will also change; but the effective range of the rising effect will only change with the vertical range of the ventilator (Y axis) (the bottom may have no rising effect).
** However, only near the ventilator will have this sound effect.
** Floating ball bugs may also occur when passing through a ventilator with too high a magnification.

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