52 lines
1.8 KiB
GDScript
52 lines
1.8 KiB
GDScript
@tool
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extends BTAction
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@export var target_location_var: StringName = &"target_location"
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var target_position: Vector3 = Vector3.ZERO
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var _current_look_direction:Vector3 = Vector3.BACK
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var _current_look_angle:float = 0
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var _target_look_direction:Vector3 = Vector3.BACK
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var _target_look_angle:float = 0
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var _look_angle_damper:SpringDamper = SpringDamper.new(0, 2, 0.06, 0.003)
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var _agent_npc:NonPlayerCharacter = null
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func _generate_name() -> String:
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return "LookAtTarget(%s)" % LimboUtility.decorate_var(target_location_var)
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func _tick(delta: float) -> Status:
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_agent_npc = agent as NonPlayerCharacter
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target_position = blackboard.get_var(target_location_var)
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update_look_direction(delta)
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if DebugSystem.debug_npc == _agent_npc: DebugDraw3D.draw_arrow(_agent_npc.global_position, target_position, Color.CRIMSON, 0.1, true)
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if absf(_target_look_angle - _current_look_angle) < deg_to_rad(1) and _look_angle_damper.v < 0.1:
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return SUCCESS
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return FAILURE
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func clamp_current_look_angle() -> void:
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if _target_look_angle - _current_look_angle > PI:
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_current_look_angle = _current_look_angle + PI * 2
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elif _current_look_angle - _target_look_angle > PI:
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_current_look_angle = _current_look_angle - PI * 2
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func update_look_direction(delta:float) -> void:
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_target_look_direction = (target_position - agent.global_position).normalized()
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_current_look_direction = agent.basis.z
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_current_look_angle = _current_look_direction.signed_angle_to(Vector3.BACK, Vector3.UP)
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clamp_current_look_angle()
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_target_look_angle = _target_look_direction.signed_angle_to(Vector3.BACK, Vector3.UP)
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_current_look_angle = _look_angle_damper.calc(_current_look_angle, _target_look_angle, delta)
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clamp_current_look_angle()
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_current_look_direction = Vector3(sin(-_current_look_angle), 0, cos(-_current_look_angle))
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agent.basis = Basis.looking_at(-_current_look_direction)
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