/// <summary>
/// Creates the smooth tween of the two specified ViewStates.
/// </summary>
/// <param name="startViewState">Start <see cref="ViewState"/> of the tween.</param>
/// <param name="endViewState">End <see cref="ViewState"/> of the tween.</param>
/// <param name="t">The interpolation coefficient.</param>
/// <returns>A <see cref="ViewState"/> representing the tween of the specifed ViewStates.</returns>
internal static ViewState CreateSmoothTween(
ViewState startViewState, ViewState endViewState, double t)
{
t = 3 * Math.Pow(t, 2) - 2 * Math.Pow(t, 3);
return startViewState.CreateTween(endViewState, t);
}
/// <summary> /// Sets the view state for this viewer instance. /// </summary> /// <param name="viewState">New <see cref="ViewState"/> to apply to the view.</param> protected abstract void SetViewState(ViewState viewState);
/// <summary>
/// Changes the view camera and transform settings to the specified <see cref="ViewState"/>
/// through an animation.
/// </summary>
/// <param name="viewState">The target <see cref="ViewState"/> to animate to.</param>
internal void AnimateToViewState(ViewState viewState)
{
this.StartViewStateAnimation();
this.startViewState = this.GetViewState();
this.endViewState = viewState;
viewStateChangeStartTime = DateTime.Now;
DispatcherTimer viewStateTimer = new DispatcherTimer();
viewStateTimer.Interval = TimeSpan.FromMilliseconds(20);
viewStateTimer.Tick += this.ViewStateTimerTick;
viewStateTimer.Start();
}
/// <summary>
/// Sets the view state.
/// </summary>
/// <param name="viewState">New <see cref="ViewState"/> to apply to the view.</param>
protected override void SetViewState(ViewState viewState)
{
PdbViewState pdbViewState = viewState as PdbViewState;
if (pdbViewState != null)
this.structureControl.SetViewState(pdbViewState);
}
/// <summary> /// Creates the tween of the instance and the specified end ViewState. /// </summary> /// <param name="endViewState">End <see cref="ViewState"/> of the tween.</param> /// <param name="t">The interpolation coefficient.</param> /// <returns> /// A <see cref="ViewState"/> representing the tween of this instance and the specifed end ViewState. /// </returns> protected abstract ViewState CreateTween(ViewState endViewState, double t);
/// <summary>
/// Creates the tween of the instance and the specified end ViewState.
/// </summary>
/// <param name="endViewState">End <see cref="ViewState"/> of the tween.</param>
/// <param name="t">The interpolation coefficient.</param>
/// <returns>
/// A <see cref="ViewState"/> representing the tween of this instance and the specifed end ViewState.
/// </returns>
protected override ViewState CreateTween(ViewState endViewState, double t)
{
PdbViewState tweenViewState = new PdbViewState();
PdbViewState otherViewState = endViewState as PdbViewState;
if (otherViewState != null)
{
tweenViewState.translation = this.translation +
t * (otherViewState.translation - this.translation);
tweenViewState.scale = this.scale + t * (otherViewState.scale - this.scale);
tweenViewState.clip = this.clip + t * (otherViewState.clip - this.clip);
tweenViewState.slab = this.slab + t * (otherViewState.slab - this.slab);
tweenViewState.rotation = Quaternion.Slerp(
this.rotation, otherViewState.rotation, t);
}
return tweenViewState;
}
/// <summary> /// Creates the tween of the instance and the specified end ViewState. /// </summary> /// <param name="endViewState">End <see cref="ViewState"/> of the tween.</param> /// <param name="t">The interpolation coefficient.</param> /// <returns> /// A <see cref="ViewState"/> representing the tween of this instance and the specifed end ViewState. /// </returns> protected abstract ViewState CreateTween(ViewState endViewState, double t);
