Help with BT, please. Trying to incorporate timer node.

[ScriptGeekParticipant]

I’m having a tough time figuring out how to get my behavior tree to set “exitEvade = false” after the timer, which is nested in after the constraintToFear constraint node. The timer seems to be running continuously and never exits once it is visited, even though the timer is set to 5 seconds. What could be the problem?

Here is the export of my behavior tree:

<behaviortree version="1.1" repeatuntil="" name="enemyAI"><parallel tiebreaker="fail" succeed="all" repeatuntil="" name="parallel" fail="any"><detect sensor=""enemyEyes"" repeatuntil="" name="detect" entityobjectvariable="formVar" aspectvariable="" aspectobjectvariable="" aspect=""Player"" /><selector usepriorities="False" repeatuntil="" name="Select Behaviors"><constraint repeatuntil="" priority="" name="Wander" constraint="formVar == null"><selector usepriorities="False" repeatuntil="" name="selector"><constraint repeatuntil="" priority="" name="constraintToWander" constraint="exitEvade == false"><sequencer usepriorities="False" repeatuntil="" name="sequencer"><expression returnvalue="evaluate" repeatuntil="" priority="" name="expression" expression="steering = 1" /><action repeatuntil="" priority="" parametervalues="" parameters="" namespace="(global)" name="actionWander" classname="EnemySteering" /></sequencer></constraint><constraint repeatuntil="" priority="" name="constraintToFear" constraint="exitEvade == true"><parallel tiebreaker="fail" succeed="all" repeatuntil="" name="parallel" fail="any"><sequencer usepriorities="False" repeatuntil="" name="sequencer"><expression returnvalue="evaluate" repeatuntil="" priority="" name="expression" expression="steering = 3" /><action repeatuntil="" priority="" parametervalues="" parameters="" namespace="(global)" name="actionFear" classname="EnemySteering" /></sequencer><sequencer usepriorities="False" repeatuntil="" name="sequencer"><timer waitforsec="5" returnvalue="success" priority="" name="timer" /><expression returnvalue="evaluate" repeatuntil="" priority="" name="expression" expression="exitEvade = false" /></sequencer></parallel></constraint></selector></constraint><constraint repeatuntil="" priority="" name="Evade" constraint="formVar != null"><sequencer usepriorities="False" repeatuntil="" name="sequencer"><expression returnvalue="evaluate" repeatuntil="" priority="" name="expression" expression="steering = 2" /><action repeatuntil="" priority="" parametervalues="" parameters="" namespace="(global)" name="actionEvade" classname="EnemySteering" /><expression returnvalue="evaluate" repeatuntil="" priority="" name="expression" expression="exitEvade = true" /></sequencer></constraint></selector></parallel></behaviortree>

[JesterKeymaster]

Hello ScriptGeek!

Check out our new RAIN 2.0.10 tutorials they incorporate a Timer Node

http://rivaltheory.com/forums/topic/get-started-with-rain-2-0-10-video-walkthrough/

Let me know what you think.

Best,
Jester

[ScriptGeekParticipant]

Thanks for the response, Jester.

Those videos are extremely helpful, but they did not explain why my behavior tree was not working with my timer nodes.

To make a long story short, I narrowed the cause of the timer node not working down to the Parallel node attributes being set to, Fail: Any, Succeed: Any, Tie Breaker: Fail. I got it to work by changing these attributes to, Fail: Any, Succeed: All.

And after all the hours spent fussing with this problem it was something so simple.

[JesterKeymaster]

I feel your pain on that front! How do you think we could make the system better to ensure simple mistakes like that don’t take so many hours to fix?

Any feedback would be helpful

Best,
Jester

[ScriptGeekParticipant]

Well, I’ve tried troubleshooting using the behavior tree editor window and the AIRig script component GUI and I’ve noticed some strange things happening.

1. The behavior tree editor will sometimes stop highlighting the current node path, forcing me to close the BT editor and reopen it to resume its highlighting feature.

2. The AIRig script component GUI’s memory tab doesn’t automatically update the display for the variable values, which had me pausing Unity and clicking another AIRig script tab, then clicking back on the memory tab, and finally clicking the pause button for Unity to resume.

An improvement suggestion for the BT editor is to try queuing up the node traversal and display node events in slow motion when Unity is being stepped through events while Unity is paused.

[JesterKeymaster]

Thanks so much for the feedback I will send this over to the dev team

Let me know if I can do anything for you.

Best,
Jester

[ScriptGeekParticipant]

Hmm, not sure if I should post this here or not… I’m looking at incorporating steering behaviors with RAIN. I found an article from last year that mentions RAIN{indie} having built-in steering behaviors.

I’m very curious, does the new RAIN retain this functionality?

I’m currently tinkering around with UnitySteer to see how I can get RAIN and UnitySteer to play nicely together.

[ScriptGeekParticipant]

I found the answer here. Steering behaviors were removed from RAIN. =(

[Author]

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