// Load movies and display movie layers
private AVPlayerLayer ConfigurePlayer(string movieName, string hostingNodeName)
{
var player = AVPlayer.FromUrl(NSUrl.FromFilename(movieName));
player.ActionAtItemEnd = AVPlayerActionAtItemEnd.None; // loop
NSNotificationCenter.DefaultCenter.AddObserver(this, new Selector("PlayerItemDidReachEnd"), AVPlayerItem.DidPlayToEndTimeNotification, player.CurrentItem);
player.Play();
// Set an arbitrary frame. This frame will be the size of our movie texture so if it is too small it will appear scaled up and blurry, and if it is too big it will be slow
var playerLayer = new AVPlayerLayer();
playerLayer.Player = player;
playerLayer.ContentsGravity = AVPlayerLayer.GravityResizeAspectFill;
playerLayer.Frame = new CGRect(0, 0, 600, 800);
// Use a parent layer with a background color set to black
// That way if the movie is stil loading and the frame is transparent, we won't see holes in the model
var backgroundLayer = CALayer.Create();
backgroundLayer.BackgroundColor = NSColor.Black.CGColor;
backgroundLayer.Frame = new CGRect(0, 0, 600, 800);
backgroundLayer.AddSublayer(playerLayer);
var frameNode = GroundNode.FindChildNode(hostingNodeName, true);
var material = frameNode.Geometry.Materials [1];
material.Diffuse.Contents = backgroundLayer;
return(playerLayer);
}
private void UnhighlightContact(int index)
{
var contactNode = GroundNode.FindChildNode("contact" + index, true);
//TODO contactNode.Filters = null;
// Restore the original position and scale
contactNode.Scale = new SCNVector3(1, 1, 1);
contactNode.Position = new SCNVector3(contactNode.Position.X, contactNode.Position.Y, contactNode.Position.Z - 50);
}
public override void PresentStep(int index, PresentationViewController presentationViewController)
{
switch (index)
{
case 0:
// Hide everything (in case the user went backward)
for (var i = 1; i < 4; i++)
{
var teapot = GroundNode.FindChildNode("Teapot" + i, true);
teapot.Opacity = 0.0f;
}
break;
case 1:
// Move the camera and adjust the clipping plane
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 3;
presentationViewController.CameraNode.Position = new SCNVector3(0, 0, 200);
presentationViewController.CameraNode.Camera.ZFar = 500.0f;
SCNTransaction.Commit();
break;
case 2:
// Revert to original position
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1;
presentationViewController.CameraNode.Position = new SCNVector3(0, 0, 0);
presentationViewController.CameraNode.Camera.ZFar = 100.0f;
SCNTransaction.Commit();
break;
case 3:
var numberNodes = new SCNNode[] { AddNumberNode("64k", -17),
AddNumberNode("6k", -9),
AddNumberNode("3k", -1),
AddNumberNode("1k", 6.5f),
AddNumberNode("256", 14) };
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1;
// Move the camera and the text
presentationViewController.CameraHandle.Position = new SCNVector3(presentationViewController.CameraHandle.Position.X, presentationViewController.CameraHandle.Position.Y + 6, presentationViewController.CameraHandle.Position.Z);
TextManager.TextNode.Position = new SCNVector3(TextManager.TextNode.Position.X, TextManager.TextNode.Position.Y + 6, TextManager.TextNode.Position.Z);
// Show the remaining resolutions
for (var i = 0; i < 5; i++)
{
var numberNode = numberNodes [i];
numberNode.Position = new SCNVector3(numberNode.Position.X, 7, -5);
var teapot = GroundNode.FindChildNode("Teapot" + i, true);
teapot.Opacity = 1.0f;
teapot.Rotation = new SCNVector4(0, 0, 1, (float)(Math.PI / 4));
teapot.Position = new SCNVector3((i - 2) * 8, 5, teapot.Position.Z);
}
SCNTransaction.Commit();
break;
case 4:
presentationViewController.ShowsNewInSceneKitBadge(true);
// Remove the numbers
RemoveNumberNodes();
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1;
// Add some text and code
TextManager.SetSubtitle("SCNLevelOfDetail");
TextManager.AddCode("#var lod1 = SCNLevelOfDetail.#CreateWithWorldSpaceDistance# (aGeometry, aDistance); \n"
+ "geometry.#LevelsOfDetail# = new SCNLevelOfDetail { lod1, lod2, ..., lodn };#");
// Animation the merge
for (int i = 0; i < 5; i++)
{
var teapot = GroundNode.FindChildNode("Teapot" + i, true);
teapot.Opacity = i == 0 ? 1.0f : 0.0f;
teapot.Rotation = new SCNVector4(0, 0, 1, 0);
teapot.Position = new SCNVector3(0, -5, teapot.Position.Z);
}
// Move the camera and the text
presentationViewController.CameraHandle.Position = new SCNVector3(presentationViewController.CameraHandle.Position.X, presentationViewController.CameraHandle.Position.Y - 3, presentationViewController.CameraHandle.Position.Z);
TextManager.TextNode.Position = new SCNVector3(TextManager.TextNode.Position.X, TextManager.TextNode.Position.Y - 3, TextManager.TextNode.Position.Z);
SCNTransaction.Commit();
break;
case 5:
presentationViewController.ShowsNewInSceneKitBadge(false);
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 3;
// Change the lighting to remove the front light and rise the main light
presentationViewController.UpdateLightingWithIntensities(new float[] { 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.3f });
presentationViewController.RiseMainLight(true);
// Remove some text
TextManager.FadeOutText(SlideTextManager.TextType.Title);
TextManager.FadeOutText(SlideTextManager.TextType.Subtitle);
TextManager.FadeOutText(SlideTextManager.TextType.Code);
SCNTransaction.Commit();
// Retrieve the main teapot
var maintTeapot = GroundNode.FindChildNode("Teapot0", true);
// The distances to use for each LOD
var distances = new float[] { 30, 50, 90, 150 };
// An array of SCNLevelOfDetail instances that we will build
var levelsOfDetail = new SCNLevelOfDetail[4];
for (var i = 1; i < 5; i++)
{
var teapotNode = GroundNode.FindChildNode("Teapot" + i, true);
var teapot = teapotNode.Geometry;
// Unshare the material because we will highlight the different levels of detail with different colors in the next step
teapot.FirstMaterial = (SCNMaterial)teapot.FirstMaterial.Copy();
// Build the SCNLevelOfDetail instance
var levelOfDetail = SCNLevelOfDetail.CreateWithWorldSpaceDistance(teapot, distances [i - 1]);
levelsOfDetail [i - 1] = levelOfDetail;
}
maintTeapot.Geometry.LevelsOfDetail = levelsOfDetail;
// Duplicate and move the teapots
var startTime = CAAnimation.CurrentMediaTime();
var delay = 0.2;
var rowCount = 9;
var columnCount = 12;
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 0;
// Change the far clipping plane to be able to see far away
presentationViewController.CameraNode.Camera.ZFar = 1000.0;
for (var j = 0; j < columnCount; j++)
{
for (var i = 0; i < rowCount; i++)
{
// Clone
var clone = maintTeapot.Clone();
maintTeapot.ParentNode.AddChildNode(clone);
// Animate
var animation = CABasicAnimation.FromKeyPath("position");
animation.Additive = true;
animation.Duration = 1.0;
animation.To = NSValue.FromVector(new SCNVector3((i - rowCount / 2.0f) * 12.0f, 5 + (columnCount - j) * 15.0f, 0));
animation.From = NSValue.FromVector(new SCNVector3(0, 0, 0));
animation.BeginTime = startTime + delay; // desynchronize
// Freeze at the end of the animation
animation.RemovedOnCompletion = false;
animation.FillMode = CAFillMode.Forwards;
clone.AddAnimation(animation, new NSString("cloneAnimation"));
// Animate the hidden property to automatically show the node when the position animation starts
animation = CABasicAnimation.FromKeyPath("hidden");
animation.Duration = delay + 0.01;
animation.FillMode = CAFillMode.Both;
animation.From = new NSNumber(1);
animation.To = new NSNumber(0);
clone.AddAnimation(animation, new NSString("cloneAnimation2"));
delay += 0.05;
}
}
SCNTransaction.Commit();
// Animate the camera while we duplicate the nodes
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1.0 + rowCount * columnCount * 0.05;
var position = presentationViewController.CameraHandle.Position;
presentationViewController.CameraHandle.Position = new SCNVector3(position.X, position.Y + 5, position.Z);
presentationViewController.CameraPitch.Rotation = new SCNVector4(1, 0, 0, presentationViewController.CameraPitch.Rotation.W - ((float)(Math.PI / 4) * 0.1f));
SCNTransaction.Commit();
break;
case 6:
// Highlight the levels of detail with colors
var teapotChild = GroundNode.FindChildNode("Teapot0", true);
var colors = new NSColor[] { NSColor.Red, NSColor.Orange, NSColor.Yellow, NSColor.Green };
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1;
for (var i = 0; i < 4; i++)
{
var levelOfDetail = teapotChild.Geometry.LevelsOfDetail [i];
levelOfDetail.Geometry.FirstMaterial.Multiply.Contents = colors [i];
}
SCNTransaction.Commit();
break;
}
}
