RAIN.BehaviorTrees.BTConditionNode Class Reference

BTConditionNode is a behavior tree leaf node that evaluates a conditional expression to either true or false. A true evaluation will return an ActionResult of SUCCESS. A false evaluation will return an ActionResult of FAILURE. More complex computational evaluations must be coded as BTActionNodes. More...

Inheritance diagram for RAIN.BehaviorTrees.BTConditionNode:

List of all members.

Public Member Functions
	BTConditionNode (string nodeName)
	Constructor.
void	SetExpression (string expression)
	Set the conditional expression using parseable text.
override ActionResult	Start (Agent agent, float deltaTime)
	Start Action handler.
override ActionResult	Execute (Agent agent, float deltaTime)
	Execute causes the ConditionalExpression to be evaluated. The variable context is reset before evaluation based on the VariableContext stored in the actionContext.
override Action.Action.ActionResult	Stop (Agent agent, float deltaTime)
	Stop Action handler.
Public Attributes
const string	NODETYPE = "condition"
	Node type, used in xml parsing.
Properties
ConditionalExpression	Conditional [get, set]

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Detailed Description

BTConditionNode is a behavior tree leaf node that evaluates a conditional expression to either true or false. A true evaluation will return an ActionResult of SUCCESS. A false evaluation will return an ActionResult of FAILURE. More complex computational evaluations must be coded as BTActionNodes.

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Constructor & Destructor Documentation

RAIN.BehaviorTrees.BTConditionNode.BTConditionNode

(

string

nodeName

)

Constructor.

Parameters:

nodeName

The name of the node to create

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Member Function Documentation

override ActionResult RAIN.BehaviorTrees.BTConditionNode.Execute	(	Agent	agent,
		float	deltaTime
	)		[virtual]

Execute causes the ConditionalExpression to be evaluated. The variable context is reset before evaluation based on the VariableContext stored in the actionContext.

Parameters:

agent	AI Agent owner of the behavior tree
deltaTime	timestep in seconds

Returns:

ActionResult, SUCCESS if the expression evaluates to true, FAILURE otherwise

Reimplemented from RAIN.Action.Action.

void RAIN.BehaviorTrees.BTConditionNode.SetExpression

(

string

expression

)

Set the conditional expression using parseable text.

Parameters:

expression

The text expression to parse. See Belief.ConditionalExpressionParser.

override ActionResult RAIN.BehaviorTrees.BTConditionNode.Start	(	Agent	agent,
		float	deltaTime
	)		[virtual]

Start Action handler.

Parameters:

agent	AI Agent owner of the behavior tree
deltaTime	timestep in seconds

Returns:

ActionResult

Reimplemented from RAIN.Action.Action.

override Action.Action.ActionResult RAIN.BehaviorTrees.BTConditionNode.Stop	(	Agent	agent,
		float	deltaTime
	)		[virtual]

Stop Action handler.

Parameters:

agent	AI Agent owner of the behavior tree
deltaTime	timestep in seconds

Returns:

ActionResult

Reimplemented from RAIN.Action.Action.

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Member Data Documentation

const string RAIN.BehaviorTrees.BTConditionNode.NODETYPE = "condition"

Node type, used in xml parsing.