175 lines
7.7 KiB
ReStructuredText
175 lines
7.7 KiB
ReStructuredText
:github_url: hide
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.. DO NOT EDIT THIS FILE!!!
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.. Generated automatically from Godot engine sources.
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.. Generator: https://github.com/godotengine/godot/tree/master/doc/tools/make_rst.py.
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.. XML source: https://github.com/godotengine/godot/tree/master/modules/limboai/doc_classes/BTProbabilitySelector.xml.
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.. _class_BTProbabilitySelector:
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BTProbabilitySelector
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=====================
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**Inherits:** :ref:`BTComposite<class_BTComposite>` **<** :ref:`BTTask<class_BTTask>` **<** :ref:`BT<class_BT>`
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BT composite that chooses a child task to execute based on attached probabilities.
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.. rst-class:: classref-introduction-group
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Description
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-----------
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BTProbabilitySelector chooses a child task to execute based on attached probabilities. It is typically used for decision-making purposes. Probability distribution is calculated based on weights assigned to each child task.
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Returns ``SUCCESS`` when a child task results in ``SUCCESS``.
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Returns ``RUNNING`` when a child task results in ``RUNNING``.
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The behavior of BTProbabilitySelector when a child task results in ``FAILURE`` depends on the :ref:`abort_on_failure<class_BTProbabilitySelector_property_abort_on_failure>` value:
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- If :ref:`abort_on_failure<class_BTProbabilitySelector_property_abort_on_failure>` is ``false``, when a child task results in ``FAILURE``, BTProbabilitySelector will normalize the probability distribution over the remaining children and choose a new child task to be executed. If all child tasks fail, the composite will return ``FAILURE``.
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- If :ref:`abort_on_failure<class_BTProbabilitySelector_property_abort_on_failure>` is ``true``, when a child task results in ``FAILURE``, BTProbabilitySelector will not choose another child task to be executed and will immediately return ``FAILURE``.
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.. rst-class:: classref-reftable-group
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Properties
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----------
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.. table::
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:widths: auto
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+----------+--------------------------------------------------------------------------------+-----------+
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| ``bool`` | :ref:`abort_on_failure<class_BTProbabilitySelector_property_abort_on_failure>` | ``false`` |
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+----------+--------------------------------------------------------------------------------+-----------+
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.. rst-class:: classref-reftable-group
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Methods
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-------
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.. table::
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:widths: auto
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+-----------+--------------------------------------------------------------------------------------------------------------------------------+
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| ``float`` | :ref:`get_probability<class_BTProbabilitySelector_method_get_probability>`\ (\ child_idx\: ``int``\ ) |const| |
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+-----------+--------------------------------------------------------------------------------------------------------------------------------+
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| ``float`` | :ref:`get_total_weight<class_BTProbabilitySelector_method_get_total_weight>`\ (\ ) |const| |
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+-----------+--------------------------------------------------------------------------------------------------------------------------------+
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| ``float`` | :ref:`get_weight<class_BTProbabilitySelector_method_get_weight>`\ (\ child_idx\: ``int``\ ) |const| |
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+-----------+--------------------------------------------------------------------------------------------------------------------------------+
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| ``bool`` | :ref:`has_probability<class_BTProbabilitySelector_method_has_probability>`\ (\ child_idx\: ``int``\ ) |const| |
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+-----------+--------------------------------------------------------------------------------------------------------------------------------+
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| |void| | :ref:`set_probability<class_BTProbabilitySelector_method_set_probability>`\ (\ child_idx\: ``int``, probability\: ``float``\ ) |
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+-----------+--------------------------------------------------------------------------------------------------------------------------------+
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| |void| | :ref:`set_weight<class_BTProbabilitySelector_method_set_weight>`\ (\ child_idx\: ``int``, weight\: ``float``\ ) |
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+-----------+--------------------------------------------------------------------------------------------------------------------------------+
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Property Descriptions
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---------------------
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.. _class_BTProbabilitySelector_property_abort_on_failure:
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.. rst-class:: classref-property
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``bool`` **abort_on_failure** = ``false`` :ref:`🔗<class_BTProbabilitySelector_property_abort_on_failure>`
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.. rst-class:: classref-property-setget
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- |void| **set_abort_on_failure**\ (\ value\: ``bool``\ )
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- ``bool`` **get_abort_on_failure**\ (\ )
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If ``true``, BTProbabilitySelector will not choose another child to execute and will return ``FAILURE`` when a child task results in ``FAILURE``.
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.. rst-class:: classref-section-separator
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----
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.. rst-class:: classref-descriptions-group
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Method Descriptions
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-------------------
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.. _class_BTProbabilitySelector_method_get_probability:
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.. rst-class:: classref-method
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``float`` **get_probability**\ (\ child_idx\: ``int``\ ) |const| :ref:`🔗<class_BTProbabilitySelector_method_get_probability>`
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Returns the child task's selection probability.
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.. rst-class:: classref-item-separator
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----
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.. _class_BTProbabilitySelector_method_get_total_weight:
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.. rst-class:: classref-method
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``float`` **get_total_weight**\ (\ ) |const| :ref:`🔗<class_BTProbabilitySelector_method_get_total_weight>`
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Returns the total weight of all child tasks.
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.. rst-class:: classref-item-separator
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----
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.. _class_BTProbabilitySelector_method_get_weight:
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.. rst-class:: classref-method
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``float`` **get_weight**\ (\ child_idx\: ``int``\ ) |const| :ref:`🔗<class_BTProbabilitySelector_method_get_weight>`
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Returns the child task's weight within the weighted probability selection algorithm.
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.. rst-class:: classref-item-separator
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----
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.. _class_BTProbabilitySelector_method_has_probability:
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.. rst-class:: classref-method
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``bool`` **has_probability**\ (\ child_idx\: ``int``\ ) |const| :ref:`🔗<class_BTProbabilitySelector_method_has_probability>`
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Returns whether the child task at index ``child_idx`` participates within the weighted probability selection algorithm and has a probability assigned to it. Returns ``false`` for :ref:`BTComment<class_BTComment>` tasks.
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.. rst-class:: classref-item-separator
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----
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.. _class_BTProbabilitySelector_method_set_probability:
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.. rst-class:: classref-method
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|void| **set_probability**\ (\ child_idx\: ``int``, probability\: ``float``\ ) :ref:`🔗<class_BTProbabilitySelector_method_set_probability>`
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Sets the child task's weight calculated based on the desired probability.
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.. rst-class:: classref-item-separator
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----
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.. _class_BTProbabilitySelector_method_set_weight:
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.. rst-class:: classref-method
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|void| **set_weight**\ (\ child_idx\: ``int``, weight\: ``float``\ ) :ref:`🔗<class_BTProbabilitySelector_method_set_weight>`
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Sets the child task's weight for the weighted probability selection algorithm.
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.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
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.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
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.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
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.. |constructor| replace:: :abbr:`constructor (This method is used to construct a type.)`
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.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`
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.. |operator| replace:: :abbr:`operator (This method describes a valid operator to use with this type as left-hand operand.)`
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.. |bitfield| replace:: :abbr:`BitField (This value is an integer composed as a bitmask of the following flags.)`
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.. |void| replace:: :abbr:`void (No return value.)`
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