It is my first question here. I hope it is not so stupid question 😀

In Apple Vision pro I’ve make a ground :

if let floor = scene.findEntity(named: "Sol")
{
    floor.components[PhysicsBodyComponent.self] = .init(
        massProperties: .default,
        material: .generate( staticFriction: 1, dynamicFriction: 0.5, restitution: 0),
        mode: .static)
    floor.generateCollisionShapes( recursive: false)
    floor.components.set( ImageBasedLightComponent(source: .single( environmentLight!)))
    floor.components.set( ImageBasedLightReceiverComponent( imageBasedLight: floor))
}

and I make a ball :

if let sphere = scene.findEntity(named: "Boule_Chrome")
{
    Set_Entity_Params( entity: sphere, mass: 0.70, friction: kBoules_Friction, rebond: 0.0005, ralentissement: 1)
    sphere.components.set( ImageBasedLightComponent(source: .single( environmentLight!)))
    sphere.components.set( ImageBasedLightReceiverComponent( imageBasedLight: sphere))
}
.

..

func Set_Entity_Params( entity: Entity, mass: Float, friction: Float, rebond: Float, ralentissement: Float, mode: PhysicsBodyMode = .dynamic)
{
    entity.components.set( InputTargetComponent())// Permet d'etre saisisable à la main
    entity.components.set( GroundingShadowComponent(castsShadow: true))

    var spherePhysics = PhysicsBodyComponent( massProperties: .init(mass: mass), material: .generate(staticFriction: friction, dynamicFriction: friction, restitution: rebond), mode: mode)
    spherePhysics.isRotationLocked = (x:false, y:false, z:false)
    spherePhysics.isContinuousCollisionDetectionEnabled = true
    spherePhysics.angularDamping = 0.9 
    spherePhysics.linearDamping = ralentissement 
    entity.components.set( spherePhysics)
}

To launch the ball on the ground, I just apply a linear Velocity :
sphere.components[PhysicsMotionComponent.self]?.linearVelocity = SIMD3(0, 0, -7.8)

All is perfect, the ball is launched, touch the ground and move on the ground, that’s perfect. EXCEPTING the ball not roll on the ground, it slide !!!! 🙁

Some one could help me to have the ball rolling on the ground please ?

Cheers
Mathis