Method Extrapolate

Extrapolate(in RigidTransform, in PhysicsVelocity, in PhysicsMass, float)

Compute a simple extrapolated transform for the graphical representation of a rigid body using its currentTransform and currentVelocity. Because bodies' motion may change the next time physics steps (e.g., as the result of a collision), using this method can mis-predict their future locations, causing them to appear to snap into place the next time physics steps. It generally results in a solid contact and kick from collisions, albeit with some interpenetration, as well as slight jitter on small, smooth velocity changes (e.g., the top of a parabolic arc).

Simulation:                Graphical Extrapolation:

              O (t=2)                     O (t=2)
(t=0) O      /               (t=0) O     o
       \    /                       o   o
        \  O (t=1)                   o O (t=1)
_________\/_________       ___________o________
                                       o

Declaration

public static RigidTransform Extrapolate(in RigidTransform currentTransform, in PhysicsVelocity currentVelocity, in PhysicsMass mass, float timeAhead)

Parameters

Type	Name	Description
RigidTransform	currentTransform	The transform of the rigid body after physics has stepped (i.e., the value of its LocalTransform components).
PhysicsVelocity	currentVelocity	The velocity of the rigid body after physics has stepped (i.e., the value of its PhysicsVelocity component).
PhysicsMass	mass	The body's PhysicsMass component.
float	timeAhead	A value indicating how many seconds the current elapsed time for graphics is ahead of the elapsed time when physics last stepped.

Returns

Type	Description
RigidTransform	An extrapolated transform for a rigid body's graphical representation, suitable for constructing its LocalToWorld matrix before rendering. See also BuildLocalToWorld(int, RigidTransform, float, bool, NativeArray<PostTransformMatrix>).