Skeletal Mesh Component

Miscs

If Simulate physics is grayed out it means you are missing a proper collision or a physic asset.

Physics

Info

• You can some physics related code in SkeletalMeshComponentPhysics.cpp
• You can find physics related animation code in PhysAnim.cpp.

How the animation updates the physics

Warning

The following process is done if the KinematicBonesUpdateType variable is set to SkipSimulatingBones, even if no animations are played.

Inside USkeletalMeshComponent::PostAnimEvaluation, after the animations were processed we call USkeletalMeshComponent::UpdateKinematicBonesToAnim. Then if bEnablePerPolyCollision is false we will use FPhysicsCommand::ExecuteWrite to update all the bodies of the SKM. If not teleporting it will callFPhysScene_Chaos::SetKinematicTarget_AssumesLocked otherwise it will use FPhysScene_Chaos::SetGlobalPose_AssumesLocked.