Behavior Triggers
Triggers are built-in and atomic action events which can be combined together with TriggerOperators to create more advanced action events (this combination is called Trigger Graph).
The Trigger Graph can be executed by a Behavior to control their start and stop conditions. They are used to make Entities react to various events, such as an entity entering in a predefined zone, or being at a given distance of something else.
You can edit them with the Trigger Editor by double-clicking on left (start) or right (stop) arrow-like shapes in each behavior, highlighted in yellow here :
Behavior Start / Stop Triggers shortcuts in BehaviorEditor
Note that most often it is useless to create a Trigger manually because two trigger containers will be automatically created when creating a Behavior
Note that if a trigger was edited and is not the default True and False anymore, the arrow-like shapes on the behavior will appear in a lighter grey color:
Behavior for which triggers were edited to something else than the
default True/False trigger
Triggers
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Random | enables to start or stop a behavior randomly depending on percentage at each call. |
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Current Frame | enables to start or stop a behavior by returning true if the current frame is successfully compared to a reference value. |
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Polygon Zone | enables to start or stop a behavior by returning true when the position of the root bone of an Entity is contained in a polygon zone (the polygon zone being represented by a Maya polygon) or a group of polygons. |
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Painted Zone | enables to start or stop a behavior by returning true when the position of the root bone of an Entity is contained in a painted zone of a specified color. |
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Texture | enables to start or stop a behavior by returning true when the position of the root bone of an Entity is contained in a zone of a specified color of a Maya 2d or 3d Texture. |
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Distance | enables to start or stop a behavior by returning true when the distance between the root bone of an Entity and an object (camera, mesh…) or a group of objects, is successfully compared to a reference value. |
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Driven Attribute | enables to start or stop a behavior by returning true if any Maya object attribute is successfully compared to a reference value. |
| PPAttribute | enables to start or stop a behavior by returning true if a per-particle field is successfully compared to a reference value. | |
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Expression | enables to start or stop a behavior by returning true if the evaluation of an Expressionor a Channel is successfully compared to a reference value. |
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Behavior Time | enables to stop a behavior by returning true when a behavior has been running for a certain amount of time. |
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Motion Time | enables to stop a behavior by returning true when a motion behavior(Motion Behavior , Locomotion Behavior, Synchronized Motion Behavior) has been running for a certain amount of time. |
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Script Command | enables to start or stop a behavior by returning true when the MEL or Python command returns a value different than 0. |
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Physics Collision | enables to start or stop a behavior when a collision with another physicalized entity or a Crowd Rigid Body occurs. |
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Boolean | always return the same value (true or false). |
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Fade | delay the perfom of Triggers attached to a Behavior thanks to the Ramp. |
Trigger Operators
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And | perform a AND logical operator between previous connected Triggers results. |
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Or | perform an OR logical operator between previous connected Triggers results. |
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Xor | perform an XOR logical operator between previous connected Triggers results. |
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Not | return the negation of the result of the previous Trigger. |
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Accu | is a unary logical connective that takes the previous Trigger result and returns true only if this result is true for a predefined number of times (consecutive or not). |