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https://github.com/Relintai/godot-steering-ai-framework.git
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51 lines
1.5 KiB
GDScript
51 lines
1.5 KiB
GDScript
# Container for multiple behaviors that returns the result of the first child
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# behavior with non-zero acceleration.
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# @category - Combination behaviors
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class_name GSAIPriority
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extends GSAISteeringBehavior
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var _behaviors := []
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# The index of the last behavior the container prioritized.
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var last_selected_index: int
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# If a behavior's acceleration is lower than this threshold, the container
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# considers it has an acceleration of zero.
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var zero_threshold: float
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func _init(agent: GSAISteeringAgent, _zero_threshold := 0.001).(agent) -> void:
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self.zero_threshold = _zero_threshold
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# Appends a steering behavior as a child of this container.
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func add(behavior: GSAISteeringBehavior) -> void:
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_behaviors.append(behavior)
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# Returns the behavior at the position in the pool referred to by `index`, or
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# `null` if no behavior was found.
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func get_behavior_at(index: int) -> GSAISteeringBehavior:
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if _behaviors.size() > index:
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return _behaviors[index]
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printerr("Tried to get index " + str(index) + " in array of size " + str(_behaviors.size()))
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return null
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func _calculate_steering(accel: GSAITargetAcceleration) -> void:
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var threshold_squared := zero_threshold * zero_threshold
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last_selected_index = -1
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var size := _behaviors.size()
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if size > 0:
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for i in range(size):
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last_selected_index = i
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var behavior: GSAISteeringBehavior = _behaviors[i]
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behavior.calculate_steering(accel)
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if accel.get_magnitude_squared() > threshold_squared:
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break
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else:
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accel.set_zero()
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