Developer Notes

Need to call wake up after the mouse is released. The object went to sleep due to being inactive for a period of time.


If a phsyics actor set to start awake is placed at the top of a trigger box, it will remain at rest.

Regression? (No), issue (does) occur on 4.10.4

Steps to Reproduce
  1. Open editor (any project)
  2. Add a cube mesh to level
  3. Set to movable>physics enabled>start awake
  4. Add a trigger box to level
  5. Press simulate
  6. Select cube
  7. Using the transform widget, place the cube at the very top of the trigger box as shown in the attached image


Cube remains stationary

Expected cube falls once LMB is released.

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ComponentUE - Simulation - Physics
Affects Versions4.
Target Fix4.13
CreatedApr 9, 2016
ResolvedJul 12, 2016
UpdatedApr 27, 2018
View Jira Issue