interactiontracker_positioninertiadecayrate.md

-api-id	-api-type
P:Windows.UI.Composition.Interactions.InteractionTracker.PositionInertiaDecayRate	winrt property

Windows.UI.Composition.Interactions.InteractionTracker.PositionInertiaDecayRate

-description

Inertia decay rate for position. Range is from 0 to 1.

The PositionInertiaDecayRate property defines the rate at which InteractionTracker will slow to a stop when it has entered Inertia and position is changing. The closer to 1, the faster InteractionTracker will slow to a stop and vice versa. Defined as a Vector3, each component represents the inertia decay rate for x, y, z accordingly.

-property-value

Inertia decay rate for position. Range is from 0 to 1.

-remarks

Below is a graph of the equation that models the PositionInertiaDecayRate property against the position from the starting position of InteractionTracker after entering inertia. Note that as the value of the property approaches 1, the impact of inertia increases more significantly.

In the graph, time is on the X axis, and position from the start of the interaction is on the Y. Notice that with a much larger value (closer to 1), the position from start is much smaller and plateaus earlier.

-examples

void SetupInteractionTracker()
{
  // Setup InteractionTracker
  _tracker = InteractionTracker.Create(_compositor);

  // Set the PositionInertiaDecayRate value
  _tracker.PositionInertiaDecayRate = new Vector3(0.95f);
}
          

-see-also