public static void CopyGeometryAndMaterials(this SCNNode node)
{
// this copies the material, but not the lod
if (node.Geometry != null)
{
node.UpdateGeometry(node.Geometry.CopyGeometryAndMaterials());
if (node.Geometry.LevelsOfDetail != null)
{
var lodsNew = new List <SCNLevelOfDetail>();
foreach (var lod in node.Geometry.LevelsOfDetail)
{
if (lod.Geometry != null)
{
var lodGeometryCopy = lod.Geometry.CopyGeometryAndMaterials();
lodsNew.Add(SCNLevelOfDetail.CreateWithScreenSpaceRadius(lodGeometryCopy, lod.ScreenSpaceRadius));
}
}
node.Geometry.LevelsOfDetail = lodsNew.ToArray();
}
}
foreach (var child in node.ChildNodes)
{
child.CopyGeometryAndMaterials();
}
}
// We load all nodes as references which means they share the same
// geometry and materials. For team colors, we need to set geometry overrides
// and so need unique geometry with shadable overrides for each node created.
public static void CopyGeometryForPaintColors(this SCNNode node)
{
// neutral blocks also need to be tinted
if (node.Geometry != null && !string.IsNullOrEmpty(node.Name))
{
// does this copy the LOD as well ?
if (node.Geometry.Copy() is SCNGeometry geometryCopy)
{
SetupPaintColorMask(geometryCopy, node.Name);
// this may already done by the copy() above, but just be safe
if (node.Geometry.LevelsOfDetail != null)
{
var lodsNew = new List <SCNLevelOfDetail>();
foreach (var lod in node.Geometry.LevelsOfDetail)
{
if (lod.Geometry != null)
{
if (lod.ScreenSpaceRadius > 0)
{
if (lod.Geometry.Copy() is SCNGeometry lodGeometryCopy)
{
lodGeometryCopy.SetupPaintColorMask(node.Name);
lodsNew.Add(SCNLevelOfDetail.CreateWithScreenSpaceRadius(lodGeometryCopy, lod.ScreenSpaceRadius));
}
}
else
{
if (lod.Geometry.Copy() is SCNGeometry lodGeometryCopy)
{
SetupPaintColorMask(lodGeometryCopy, node.Name);
lodsNew.Add(SCNLevelOfDetail.CreateWithWorldSpaceDistance(lodGeometryCopy, lod.WorldSpaceDistance));
}
}
}
}
geometryCopy.LevelsOfDetail = lodsNew.ToArray();
}
// set the new geometry and LOD
node.UpdateGeometry(geometryCopy);
}
}
foreach (var child in node.ChildNodes)
{
child.CopyGeometryForPaintColors();
}
}
public static void FixLevelsOfDetail(this SCNNode node, float screenSpaceRadius, bool showLOD)
{
// find the boundingRadius of the node, and scale to that
var lods = node?.Geometry?.LevelsOfDetail;
if (lods != null)
{
var lodsNew = new List <SCNLevelOfDetail>();
foreach (var lod in lods)
{
if (lod.Geometry != null)
{
if (showLOD)
{
// visualize the lod
var lodGeometryCopy = lod.Geometry.CopyGeometryAndMaterials();
// override the emission
// this is not removed currently
foreach (var material in lodGeometryCopy.Materials)
{
material.Emission.Contents = UIColor.Red;
}
lodsNew.Add(SCNLevelOfDetail.CreateWithScreenSpaceRadius(lodGeometryCopy, screenSpaceRadius));
}
else
{
lodsNew.Add(SCNLevelOfDetail.CreateWithScreenSpaceRadius(lod.Geometry, screenSpaceRadius));
}
}
}
node.Geometry.LevelsOfDetail = lodsNew.ToArray();
}
foreach (var child in node.ChildNodes)
{
child.FixLevelsOfDetail(screenSpaceRadius, showLOD);
}
}
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 [4] { 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;
}
}
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;
}
}
public CatapultInteraction(IInteractionDelegate @delegate)
{
this.Delegate = @delegate;
this.dummyBall = SCNNodeExtensions.LoadSCNAsset("projectiles_ball_8k");
// stri the geometry out of a low-lod model, assume it doesn't have an lod
if (this.dummyBall.Geometry != null)
{
var lod = SCNNodeExtensions.LoadSCNAsset("projectiles_ball");
if (lod.Geometry != null)
{
lod.Geometry.Materials = this.dummyBall.Geometry.Materials;
// this radius will be replaced by fixLevelsOfDetail
// when the level is placed
this.dummyBall.Geometry.LevelsOfDetail = new SCNLevelOfDetail[] { SCNLevelOfDetail.CreateWithScreenSpaceRadius(lod.Geometry, 100f) };
}
}
}