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Can angular constraints break when bAngularBreakable is false?

I am creating a constraint on a sphere with the following code:

 AplayerCode::AplayerCode(const class FPostConstructInitializeProperties& PCIP)
     : Super(PCIP)
     UPhysicsConstraintComponent* cc = NewObject<UPhysicsConstraintComponent>(this);
     cc->ConstraintActor1 = this;
     cc->ConstraintActor2 = NULL;
     cc->ConstraintInstance.LinearXMotion = ELinearConstraintMotion::LCM_Free;
     cc->ConstraintInstance.LinearYMotion = ELinearConstraintMotion::LCM_Free;
     cc->ConstraintInstance.LinearZMotion = ELinearConstraintMotion::LCM_Free;
     cc->ConstraintInstance.AngularSwing1Motion = EAngularConstraintMotion::ACM_Free;
     cc->ConstraintInstance.AngularSwing2Motion = EAngularConstraintMotion::ACM_Locked;
     cc->ConstraintInstance.AngularTwistMotion  = EAngularConstraintMotion::ACM_Locked;
     cc->ConstraintInstance.bAngularBreakable = false;

This seems to work as intended... I have a sphere that does not roll, but can turn left and right. However, sometimes after a collision the angular constraints seem to break and I start rolling even though I set bAngularBreakable to false. Any idea what could be causing this?

Also, I am assuming that creating a constraint tied to "this" will attach to the root component. In this example, my root component is a Sphere shape that is simulating physics.

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asked Jun 04 '14 at 03:08 PM in C++ Programming

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The problem is that I was creating the constraint in the constructor of a class. This is too early to initialize a constraint. I moved the code to the BeginPlay function and it seems to function as expected.

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answered Jun 16 '14 at 09:36 PM

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