/// <summary>
/// Animate the camera's view matrix from its current value when the activity starts
/// to the new destination matrix value.
/// </summary>
/// <param name="destination">The final matrix value.</param>
/// <param name="duration">The amount of time that the animation should take.</param>
/// <returns>
/// The newly scheduled activity, if the duration is greater than 0; else null.
/// </returns>
public virtual PTransformActivity AnimateViewToMatrix(PMatrix destination, long duration)
{
if (duration == 0)
{
ViewMatrix = destination;
return(null);
}
PTransformActivity ta = new PTransformActivity(duration, PUtil.DEFAULT_ACTIVITY_STEP_RATE, new PCameraTransformTarget(this), destination);
PRoot r = Root;
if (r != null)
{
r.AddActivity(ta);
}
return(ta);
}
/// <summary>
/// Creates a basic scene graph.
/// </summary>
/// <returns>The main camera node in the new scene graph.</returns>
/// <remarks>
/// The scene graph will consist of root node with two children, a layer and a
/// camera. Additionally, The camera will be set to view the layer. Typically,
/// you will want to add new nodes to the layer.
/// </remarks>
public static PCamera CreateBasicScenegraph()
{
PRoot r = new PRoot();
PLayer l = new PLayer();
PCamera c = new PCamera();
r.AddChild(c);
r.AddChild(l);
c.AddLayer(l);
return c;
}
/// <summary>
/// Constructs a new PActivityScheduler.
/// </summary>
/// <param name="rootNode">The root node to associate with this activity scheduler.</param>
public PActivityScheduler(PRoot rootNode)
{
root = rootNode;
activities = new PActivityList();
processingActivities = new PActivityList();
}