90 lines
4.4 KiB
XML
90 lines
4.4 KiB
XML
<?xml version="1.0" encoding="UTF-8" ?>
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<class name="BTPlayer" inherits="Node" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../doc/class.xsd">
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<brief_description>
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Player of [BehaviorTree] resources.
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</brief_description>
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<description>
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BTPlayer node is used for the instantiation and playback of [BehaviorTree] resources at runtime. During instantiation, the behavior tree instance is initialized with a reference to the agent and the [member blackboard]. Agent is the owner of the BTPlayer node (see [member Node.owner]).
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For an introduction to behavior trees, see [BehaviorTree].
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</description>
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<tutorials>
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</tutorials>
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<methods>
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<method name="get_last_status" qualifiers="const">
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<return type="int" />
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<description>
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Returns the behavior tree's last execution status. See [enum BT.Status].
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</description>
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</method>
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<method name="get_tree_instance">
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<return type="BTTask" />
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<description>
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Returns the root task of the instantiated behavior tree.
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</description>
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</method>
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<method name="restart">
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<return type="void" />
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<description>
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Resets the behavior tree's execution. Each running task will be aborted and the next tree execution will start anew. This method does not reset [Blackboard].
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</description>
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</method>
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<method name="update">
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<return type="void" />
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<param index="0" name="p_delta" type="float" />
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<description>
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Executes the root task of the behavior tree instance if [member active] is [code]true[/code]. Call this method when [member update_mode] is set to [constant MANUAL]. When [member update_mode] is not [constant MANUAL], the [method update] will be called automatically. See [enum UpdateMode].
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</description>
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</method>
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</methods>
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<members>
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<member name="active" type="bool" setter="set_active" getter="get_active" default="true">
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If [code]true[/code], the behavior tree will be executed during update.
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</member>
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<member name="behavior_tree" type="BehaviorTree" setter="set_behavior_tree" getter="get_behavior_tree">
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[BehaviorTree] resource to instantiate and execute at runtime.
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</member>
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<member name="blackboard" type="Blackboard" setter="set_blackboard" getter="get_blackboard">
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Holds data shared by the behavior tree tasks. See [Blackboard].
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</member>
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<member name="blackboard_plan" type="BlackboardPlan" setter="set_blackboard_plan" getter="get_blackboard_plan">
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Stores and manages variables that will be used in constructing new [Blackboard] instances.
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</member>
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<member name="monitor_performance" type="bool" setter="_set_monitor_performance" getter="_get_monitor_performance" default="false">
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If [code]true[/code], adds a performance monitor to "Debugger->Monitors" for each instance of this [BTPlayer] node.
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</member>
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<member name="prefetch_nodepath_vars" type="bool" setter="set_prefetch_nodepath_vars" getter="get_prefetch_nodepath_vars" default="true">
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If [code]true[/code], any [NodePath] variables in the [Blackboard] are replaced with [Node] references when the tree is instantiated. References are retrieved by calling [method Node.get_node] on the agent instance (agent is the owner of the BTPlayer node).
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</member>
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<member name="update_mode" type="int" setter="set_update_mode" getter="get_update_mode" enum="BTPlayer.UpdateMode" default="1">
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Determines when the behavior tree is executed. See [enum UpdateMode].
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</member>
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</members>
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<signals>
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<signal name="behavior_tree_finished">
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<param index="0" name="p_status" type="int" />
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<description>
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Emitted when the behavior tree has finished executing and returned [code]SUCCESS[/code] or [code]FAILURE[/code].
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Argument [param p_status] holds the status returned by the behavior tree. See [enum BT.Status].
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</description>
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</signal>
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<signal name="updated">
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<param index="0" name="p_status" type="int" />
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<description>
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Emitted when BTPlayer has finished the behavior tree update.
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Argument [param p_status] holds the status returned by the behavior tree. See [enum BT.Status].
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</description>
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</signal>
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</signals>
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<constants>
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<constant name="IDLE" value="0" enum="UpdateMode">
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Execute behavior tree during the idle process.
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</constant>
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<constant name="PHYSICS" value="1" enum="UpdateMode">
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Execute behavior tree during the physics process.
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</constant>
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<constant name="MANUAL" value="2" enum="UpdateMode">
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Behavior tree is executed manually by calling [method update].
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</constant>
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</constants>
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</class>
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