trigger_look

类层级
CTriggerLook ↳CTriggerOnce ↳CTriggerMultiple ↳CBaseTrigger ↳CBaseToggle ↳CBaseEntity
`triggers.cpp`

trigger_look是一个固体实体(en)，可在所有的起源游戏中使用。用于当玩家注视某物时触发事件。

当玩家在触发体积内注视目标实体达到指定时间后，会触发OnTrigger输出。如果玩家离开触发区域或移开视线，计时器将重置。

如果勾选了Use Velocity instead of facing属性(Flags)，触发器将使用玩家速度而非视角方向来判断，适用于玩家驾驶载具朝向目标的情况。

注意:仅设计用于单人游戏。

注意:只要玩家接触该实体，朝向目标实体方向即可触发，即使目标不在玩家直接视线内（如中间有世界几何体阻挡）。

错误:在

传送门中，通过传送门注视目标实体不会触发OnTrigger输出。 [todo tested in ?]

错误:如果地图中有多个同名目标实体，OnTrigger可能触发不稳定。输出可能延迟或完全不触发，同名实体越多问题越严重。 [todo tested in ?]

键值

Name (目标名称) <target_source>[ Edit ]: 这个名称是其他实体通过输入/输出(en) 或其他关键值(en)（如 parentname 或 target) 来引用该实体时使用的标识符。
该名称也会显示在 Hammer 编辑器的 2D 视图和实体报告(en) 中。 参见: 所有实体均可使用的通用键值、输入与输出(en)

LookTime (LookTime) <字符串(en)>: 玩家必须注视目标的秒数（离开触发区域或超出视野阈值会重置）。; 错误:值为1.0时即使直视目标也无法触发。 [todo tested in ?]

BaseTrigger
Filter Name `(filtername)` `<filter(en)>` A filter entity to test potential activators against. Start Disabled `(StartDisabled)` `<布尔值(en)>` Stay dormant until activated (with the`Enable`input).

BaseTrigger
Everything (not including physics debris) `: [64]` Clients (Survivors, Special Infected, Tanks 之中) `: [1]` Only clients in vehicles `: [32]` Only clients not in vehicles `: [512]` Disallow Bots (被移除于以来) `: [4096]` NPCs (Common Infected, Witches 之中) `: [2]` Only player ally NPCs `: [16]` Only NPCs in vehicles (respects player ally flag) `: [2048]` Physics Objects (not including physics debris) `: [8]` Physics debris (include also physics debris) `: [1024]` ~~Pushables (Passes entities with classname `func_pushable`) `: [4]`~~ 已弃用。 Equivalent to using Everything + `filter_activator_class` that filters `func_pushable`.

BaseTrigger
`Toggle` Toggles this trigger between enabled and disabled states. `Enable` Enable trigger `Disable` Disable trigger `TouchTest` (存在于自以来) Triggers either the `OnTouching` or `OnNotTouching` outputs for whether anything is touching this entity. 错误:Sleeping prop_physics will never fire "OnTouching". Also applies to entities using prop_physics as base. (tested in： ) `StartTouch` (存在于自以来) 不存在于FGD！ Behave as if the `!caller` entity had just entered the trigger volume. Accepts non-physical entities. `EndTouch` (存在于自以来) 不存在于FGD！ Behave as if `!caller` had just exited the trigger volume. `DisableAndEndTouch` (仅存在于之中) Disables this trigger and calls `EndTouch` on all currently-touching entities.

BaseTrigger
`OnStartTouch` `!activator` = entity that caused this output `!caller =` this entity Fired when a valid entity starts touching this trigger. `OnStartTouchAll` `!activator` = entity that caused this output `!caller =` this entity Fired when a valid entity starts touching this trigger, and no other entities are touching it. If there are any other entities touching the trigger when a new one begins to touch, only `OnStartTouch` will fire. `OnEndTouch` `!activator` = entity that caused this output `!caller =` this entity Fired when a valid entity stops touching this trigger. 注意:Will also fire for entities touching it when trigger is disabled via `Disable` input 警告:This includes entities which are deleted while inside the trigger. In this case `!activator` will be invalid. 警告:`OnEndTouch` can fire before `OnStartTouch` under certain circumstances^[如何?] where both are fired on the same tick and each have the same delay. 修复:Add a slight delay to `OnEndTouch`. `OnEndTouchAll` `!activator` = entity that caused this output `!caller =` this entity Fired when all valid entities stop touching this trigger. `OnTouching` (存在于自以来) `!activator = !caller =` this entity Fired if something is currently touching this trigger when `TouchTest` is fired. `OnNotTouching` (存在于自以来) `!activator = !caller =` this entity Fired if nothing is currently touching this trigger when `TouchTest` is fired.