In Unreal Engine version 5.4, all Physics Linear Velocity functions inside PrimitiveComponent class are returning always a velocity of (0,0,0), even if the Body Instances are moving. This was working correctly in older versions of the engine (5.3 for example), so it appears to be a Regression.
1- Open an Unreal Engine 5.4 project
2- Create an actor with a static mesh or a skeletal mesh
3- Make some code to move the mesh at runtime
4- Print inside the Tick function of the actor the GetPhysicsLinearVelocity function. You will see that will always return FVector(0,0,0)
5- Try this same steps in 5.3, you will see that it will return the correct velocity of the root bone.
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There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-220493 in the post.
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Component | UE - Simulation - Physics |
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Affects Versions | 5.4 |
Target Fix | 5.5 |
Fix Commit | 35449701 |
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Created | Jul 30, 2024 |
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Resolved | Aug 12, 2024 |
Updated | Aug 14, 2024 |