InteractionTrackerInertiaMotion 類別

定義

public ref class InteractionTrackerInertiaMotion sealed : InteractionTrackerInertiaModifier

/// [Windows.Foundation.Metadata.ContractVersion(Windows.Foundation.UniversalApiContract, 196608)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class InteractionTrackerInertiaMotion final : InteractionTrackerInertiaModifier

[Windows.Foundation.Metadata.ContractVersion(typeof(Windows.Foundation.UniversalApiContract), 196608)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class InteractionTrackerInertiaMotion : InteractionTrackerInertiaModifier

Public NotInheritable Class InteractionTrackerInertiaMotion
Inherits InteractionTrackerInertiaModifier

繼承

Object Platform::Object IInspectable CompositionObject InteractionTrackerInertiaModifier InteractionTrackerInertiaMotion

屬性

ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

Windows 需求

範例

void CustomSpringInertiaMotion(float dampingCoefficient, 	float springStiffnessCoefficient)
{
  //
  // Set up our inertia modifiers to use our custom motion
  //
  InteractionTrackerInertiaMotion[] modifiers = 
  new InteractionTrackerInertiaMotion[1];

  var modifier1 = InteractionTrackerInertiaMotion.Create(_compositor);

  /*
  We create a custom spring motion for when the InteractionTracker passes the
  maximum boundary. 
  When we hit the boundary, the amount of oscillation is determined by the 	distance to the far end point, the spring stiffness and damping rate.
  */ 

  // Define the condition that the spring motion gets applied – when we pass the
  // maximum boundary
  modifier1.Condition = _compositor.CreateExpressionAnimation(
  "this.Target.NaturalRestingPosition.X > this.Target.MaxPosition.X");

  // Define the second derivative equation as a custom spring force motion
  // Equation = kx–cv where (k is spring constant, c is damping, x is displacement)
  modifier1.Motion = _compositor.CreateExpressionAnimation(
    "(-springStiffnessCoefficient * (this.Target.Position.X – this.Target.MaxPosition.X)) + " +
    "(-dampingCoefficient * target.PositionVelocityInPixelsPerSecond.X");

  modifier1.Motion.SetScalarParameter("springStiffnessCoefficient", springStiffnessCoefficient);
  modifier1.Motion.SetScalarParameter("dampingCoefficient", dampingCoefficient);

  modifiers[0] = modifier1;

  // Attach InertiaModifiers to the Y position component of InteractionTracker
  _tracker.ConfigurePositionYInertiaModifiers(modifiers);
}

備註

為 InteractionTrackerInertiaMotion 的動作元件建置 ExpressionAnimation 時，運算式會描述為第二個衍生方程式。 例如，在上述程式碼片段中，我們會利用 Spring Force 動作的基本方程式搭配抑制。

將 InteractionTrackerInertiaMotion 修飾詞附加至 InteractionTracker時，您可以將它設定為 X/Y 位置或縮放比例。

定義條件屬性的 ExpressionAnimation 只會在 InteractionTracker 進入慣性 (當互動完成如手指放開) 時評估一次。 如果條件評估為 true，則慣性運算式會評估慣性其餘部分的每個畫面格，即使技術上的條件運算式不再成立也一樣。

InteractionTrackerInertiaMotion 修飾詞會變更 InteractionTracker 用來計算其位置的方程式。 因此，最終的其餘位置取決於方程式本身的本質。 如果您需要 InteractionTracker 在特定位置停止，請使用 InteractionTrackerInertiaRestingValue 修飾詞。

屬性

方法

適用於

另請參閱

• InteractionTrackerInertiaModifier
• IClosable