Unreal Engine Issues

UE-15547

State Machine Transition Order of Execution appears to be out of order

State Machine Transition Order of Execution appears to be out of order

Developer Notes

Based on our current implementation we scan for all valid transitions (up to a limit) before triggering events

UDN
Description

Licensee has called out a strange order of execution when a state machine begins a transition to another state.

  1. The condition for the transition A -> B is evaluated as true
  2. The condition for the transition B -> C is evaluated (!!!)
  3. The Left State Event for A is called
  4. The Entered State Event for B is called
  5. The Start Transition Event for A -> B is called

Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-15547 in the post.

0
Login to Vote
By Design
ComponentOLD - Anim
Affects Versions4.7.6, 4.8
CreatedMay 13, 2015
ResolvedSep 2, 2015
UpdatedJul 14, 2021
View Jira Issue