void SetupCamera()
{
SCNNode pov = GameView.PointOfView;
const float altitude = 1f;
const float distance = 10f;
cameraYHandle = SCNNode.Create();
cameraXHandle = SCNNode.Create();
cameraYHandle.Position = new SCNVector3(0f, altitude, 0f);
cameraYHandle.AddChildNode(cameraXHandle);
GameView.Scene.RootNode.AddChildNode(cameraYHandle);
pov.EulerAngles = new SCNVector3(0f, 0f, 0f);
pov.Position = new SCNVector3(0f, 0f, distance);
cameraYHandle.Rotation = new SCNVector4(0f, 1f, 0f, (float)Math.PI / 2f + (float)Math.PI / 4f * 3f);
cameraXHandle.Rotation = new SCNVector4(1f, 0f, 0f, -(float)Math.PI / 4f * 0.125f);
cameraXHandle.AddChildNode(pov);
// Animate camera on launch and prevent the user from manipulating the camera until the end of the animation
lockCamera = true;
SCNTransaction.Begin();
SCNTransaction.SetCompletionBlock(() => {
lockCamera = false;
});
var cameraYAnimation = CABasicAnimation.FromKeyPath("rotation.w");
cameraYAnimation.From = NSNumber.FromDouble(Math.PI * 2 - cameraYHandle.Rotation.W);
cameraYAnimation.To = NSNumber.FromDouble(0.0);
cameraYAnimation.Additive = true;
cameraYAnimation.BeginTime = CAAnimation.CurrentMediaTime() + 3;
cameraYAnimation.FillMode = CAFillMode.Both;
cameraYAnimation.Duration = 5.0;
cameraYAnimation.TimingFunction = CAMediaTimingFunction.FromName(CAMediaTimingFunction.EaseInEaseOut);
cameraYHandle.AddAnimation(cameraYAnimation, null);
var cameraXAnimation = CABasicAnimation.FromKeyPath("rotation.w");
cameraXAnimation.From = NSNumber.FromDouble(-Math.PI / 2 + cameraXHandle.Rotation.W);
cameraXAnimation.To = NSNumber.FromDouble(0.0);
cameraXAnimation.Additive = true;
cameraXAnimation.FillMode = CAFillMode.Both;
cameraXAnimation.Duration = 5.0;
cameraXAnimation.BeginTime = CAAnimation.CurrentMediaTime() + 3;
cameraXAnimation.TimingFunction = CAMediaTimingFunction.FromName(CAMediaTimingFunction.EaseInEaseOut);
cameraXHandle.AddAnimation(cameraXAnimation, null);
SCNTransaction.Commit();
var lookAtConstraint = SCNLookAtConstraint.Create(Character.Node.FindChildNode("Bip001_Head", true));
lookAtConstraint.InfluenceFactor = 0;
pov.Constraints = new SCNConstraint[] { lookAtConstraint };
}
public override void PresentStep(int index, PresentationViewController presentationViewController)
{
switch (index)
{
case 0:
// Set the slide's title and subtitle and add some text
TextManager.SetTitle("Constraints");
TextManager.SetSubtitle("SCNConstraint");
TextManager.AddBulletAtLevel("Applied sequentially at render time", 0);
TextManager.AddBulletAtLevel("Only affect presentation values", 0);
TextManager.AddCode("#aNode.#Constraints# = new SCNConstraint[] { aConstraint, anotherConstraint, ... };#");
// Tweak the near clipping plane of the spot light to get a precise shadow map
presentationViewController.SpotLight.Light.SetAttribute(new NSNumber(10), SCNLightAttribute.ShadowNearClippingKey);
break;
case 1:
// Remove previous text
TextManager.FlipOutText(SlideTextManager.TextType.Subtitle);
TextManager.FlipOutText(SlideTextManager.TextType.Bullet);
TextManager.FlipOutText(SlideTextManager.TextType.Code);
// Add new text
TextManager.SetSubtitle("SCNLookAtConstraint");
TextManager.AddBulletAtLevel("Makes a node to look at another node", 0);
TextManager.AddCode("#nodeA.Constraints = new SCNConstraint[] { #SCNLookAtConstraint.Create# (nodeB) };#");
TextManager.FlipInText(SlideTextManager.TextType.Subtitle);
TextManager.FlipInText(SlideTextManager.TextType.Bullet);
TextManager.FlipInText(SlideTextManager.TextType.Code);
break;
case 2:
// Setup the scene
SetupLookAtScene();
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1;
// Dim the text and move back a little bit
TextManager.TextNode.Opacity = 0.5f;
presentationViewController.CameraHandle.Position = presentationViewController.CameraNode.ConvertPositionToNode(new SCNVector3(0, 0, 5.0f), presentationViewController.CameraHandle.ParentNode);
SCNTransaction.Commit();
break;
case 3:
// Add constraints to the arrows
var container = ContentNode.FindChildNode("arrowContainer", true);
// "Look at" constraint
var constraint = SCNLookAtConstraint.Create(BallNode);
var i = 0;
foreach (var arrow in container.ChildNodes)
{
var delayInSeconds = 0.1 * i++;
var popTime = new DispatchTime(DispatchTime.Now, (long)(delayInSeconds * Utils.NSEC_PER_SEC));
DispatchQueue.MainQueue.DispatchAfter(popTime, () => {
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1;
// Animate to the result of applying the constraint
((SCNNode)arrow.ChildNodes [0]).Rotation = new SCNVector4(0, 1, 0, (float)(Math.PI / 2));
arrow.Constraints = new SCNConstraint[] { constraint };
SCNTransaction.Commit();
});
}
break;
case 4:
// Create a keyframe animation to move the ball
var animation = CAKeyFrameAnimation.FromKeyPath("position");
animation.KeyTimes = new NSNumber[] {
0.0f,
(1.0f / 8.0f),
(2.0f / 8.0f),
(3.0f / 8.0f),
(4.0f / 8.0f),
(5.0f / 8.0f),
(6.0f / 8.0f),
(7.0f / 8.0f),
1.0f
};
animation.Values = new NSObject[] {
NSValue.FromVector(new SCNVector3(0, 0.0f, 0)),
NSValue.FromVector(new SCNVector3(20.0f, 0.0f, 20.0f)),
NSValue.FromVector(new SCNVector3(40.0f, 0.0f, 0)),
NSValue.FromVector(new SCNVector3(20.0f, 0.0f, -20.0f)),
NSValue.FromVector(new SCNVector3(0, 0.0f, 0)),
NSValue.FromVector(new SCNVector3(-20.0f, 0.0f, 20.0f)),
NSValue.FromVector(new SCNVector3(-40.0f, 0.0f, 0)),
NSValue.FromVector(new SCNVector3(-20.0f, 0.0f, -20.0f)),
NSValue.FromVector(new SCNVector3(0, 0.0f, 0))
};
animation.CalculationMode = CAAnimation.AnimationCubicPaced; // smooth the movement between keyframes
animation.RepeatCount = float.MaxValue;
animation.Duration = 10.0f;
animation.TimingFunction = CAMediaTimingFunction.FromName(CAMediaTimingFunction.Linear);
BallNode.AddAnimation(animation, new NSString("ballNodeAnimation"));
// Rotate the ball to give the illusion of a rolling ball
// We need two animations to do that:
// - one rotation to orient the ball in the right direction
// - one rotation to spin the ball
animation = CAKeyFrameAnimation.FromKeyPath("rotation");
animation.KeyTimes = new NSNumber[] {
0.0f,
(0.7f / 8.0f),
(1.0f / 8.0f),
(2.0f / 8.0f),
(3.0f / 8.0f),
(3.3f / 8.0f),
(4.7f / 8.0f),
(5.0f / 8.0f),
(6.0f / 8.0f),
(7.0f / 8.0f),
(7.3f / 8.0f),
1.0f
};
animation.Values = new NSObject[] {
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI / 4))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI / 4))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI / 2))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI + Math.PI / 2))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI * 2 - Math.PI / 4))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI * 2 - Math.PI / 4))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI * 2 - Math.PI / 2))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI - Math.PI / 2))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI / 4))),
NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI / 4)))
};
animation.RepeatCount = float.MaxValue;
animation.Duration = 10.0f;
animation.TimingFunction = CAMediaTimingFunction.FromName(CAMediaTimingFunction.Linear);
BallNode.AddAnimation(animation, new NSString("ballNodeAnimation2"));
var rotationAnimation = CABasicAnimation.FromKeyPath("rotation");
rotationAnimation.Duration = 1.0f;
rotationAnimation.RepeatCount = float.MaxValue;
rotationAnimation.To = NSValue.FromVector(new SCNVector4(1, 0, 0, (float)(Math.PI * 2)));
BallNode.ChildNodes [1].AddAnimation(rotationAnimation, new NSString("ballNodeRotation"));
break;
case 5:
// Add a constraint to the camera
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1;
constraint = SCNLookAtConstraint.Create(BallNode);
presentationViewController.CameraNode.Constraints = new SCNConstraint[] { constraint };
SCNTransaction.Commit();
break;
case 6:
// Add a constraint to the light
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1;
var cameraTarget = ContentNode.FindChildNode("cameraTarget", true);
constraint = SCNLookAtConstraint.Create(cameraTarget);
presentationViewController.SpotLight.Constraints = new SCNConstraint[] { constraint };
SCNTransaction.Commit();
break;
}
}
public override void SetupSlide(PresentationViewController presentationViewController)
{
TextManager.SetTitle("Constraints");
TextManager.SetSubtitle("SCNIKConstraint");
TextManager.AddBulletAtLevel("Inverse Kinematics", 0);
TextManager.AddBulletAtLevel("Node chain", 0);
TextManager.AddBulletAtLevel("Target", 0);
//load the hero
Hero = Utils.SCAddChildNode(GroundNode, "heroGroup", "Scenes.scnassets/hero/hero", 12);
Hero.Position = new SCNVector3(0, 0, 5);
Hero.Rotation = new SCNVector4(1, 0, 0, -(nfloat)Math.PI / 2);
//hide the sword
var sword = Hero.FindChildNode("sword", true);
sword.Hidden = true;
//load attack animation
var path = NSBundle.MainBundle.PathForResource("Scenes.scnassets/hero/attack", "dae");
var source = SCNSceneSource.FromUrl(NSUrl.FromFilename(path), (NSDictionary)null);
Attack = (CAAnimation)source.GetEntryWithIdentifier("attackID", new Class("CAAnimation"));
Attack.RepeatCount = 0;
Attack.FadeInDuration = 0.1f;
Attack.FadeOutDuration = 0.3f;
Attack.Speed = 0.75f;
Attack.AnimationEvents = new SCNAnimationEvent[] { SCNAnimationEvent.Create(0.55f, (CAAnimation animation, NSObject animatedObject, bool playingBackward) => {
if (IkActive)
{
DestroyTarget();
}
}) };
AnimationDuration = Attack.Duration;
//setup IK
var hand = Hero.FindChildNode("Bip01_R_Hand", true);
var clavicle = Hero.FindChildNode("Bip01_R_Clavicle", true);
var head = Hero.FindChildNode("Bip01_Head", true);
Ik = SCNIKConstraint.Create(clavicle);
hand.Constraints = new SCNConstraint[] { Ik };
Ik.InfluenceFactor = 0.0f;
//add target
Target = SCNNode.Create();
Target.Position = new SCNVector3(-4, 7, 10);
Target.Opacity = 0;
Target.Geometry = SCNPlane.Create(2, 2);
Target.Geometry.FirstMaterial.Diffuse.Contents = new NSImage(NSBundle.MainBundle.PathForResource("Images/target", "png"));
GroundNode.AddChildNode(Target);
//look at
LookAt = SCNLookAtConstraint.Create(Target);
LookAt.InfluenceFactor = 0;
head.Constraints = new SCNConstraint[] { LookAt };
((SCNView)presentationViewController.View).WeakSceneRendererDelegate = this;
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
// Perform any additional setup after loading the view, typically from a nib.
var scene = new SCNScene();
var rnd = new Random();
Func <int, int, bool, float> random = (min, max, clamp) => {
float num = (float)((double)rnd.Next(min, max) * rnd.NextDouble());
if (!clamp)
{
return(num);
}
else if (num < 1.0f)
{
return(1.0f);
}
else
{
return(num);
}
};
Enumerable.Range(0, 200).Select <int, int> ((i) => Building(
random(2, 5, true),
random(2, 5, true),
random(2, 10, true),
random(-20, 20, false),
random(-20, 20, false),
scene,
rnd
)).ToArray();
//Lights!
var lightNode = new SCNNode()
{
Light = new SCNLight(),
Position = new SCNVector3(30.0F, 20.0F, 60.0F)
};
lightNode.Light.LightType = SCNLightType.Omni;
scene.RootNode.AddChildNode(lightNode);
var ambientLightNode = new SCNNode()
{
Light = new SCNLight()
};
ambientLightNode.Light.LightType = SCNLightType.Ambient;
ambientLightNode.Light.Color = UIColor.DarkGray;
scene.RootNode.AddChildNode(ambientLightNode);
//Camera!
var cameraNode = new SCNNode()
{
Camera = new SCNCamera()
};
scene.RootNode.AddChildNode(cameraNode);
cameraNode.Position = new SCNVector3(0.0F, 10.0F, 20.0F);
var targetNode = new SCNNode()
{
Position = new SCNVector3(00.0F, 1.5F, 0.0F)
};
scene.RootNode.AddChildNode(targetNode);
var lc = SCNLookAtConstraint.Create(targetNode);
cameraNode.Constraints = new[] { lc };
var scnView = new SCNView(UIScreen.MainScreen.Bounds)
{
Scene = scene,
AllowsCameraControl = true,
ShowsStatistics = true,
BackgroundColor = UIColor.FromRGB(52, 152, 219)
};
var floorNode = new SCNNode {
Geometry = new SCNPlane {
Height = 40.0F,
Width = 40.0F
},
Position = SCNVector3.Zero
};
var pi2 = Math.PI / 2.0;
floorNode.Orientation = SCNQuaternion.FromAxisAngle(SCNVector3.UnitX, (float)(0.0 - pi2));
scene.RootNode.AddChildNode(floorNode);
var material = new SCNMaterial();
material.Diffuse.Contents = UIImage.FromFile("Content/road.jpg");
material.Diffuse.ContentsTransform = SCNMatrix4.Scale(new SCNVector3(10.0f, 10.0f, 1.0f));
material.Diffuse.MinificationFilter = SCNFilterMode.Linear;
material.Diffuse.MagnificationFilter = SCNFilterMode.Linear;
material.Diffuse.MipFilter = SCNFilterMode.Linear;
material.Diffuse.WrapS = SCNWrapMode.Repeat;
material.Diffuse.WrapT = SCNWrapMode.Repeat;
material.Specular.Contents = UIColor.Gray;
floorNode.Geometry.FirstMaterial = material;
this.View = scnView;
}
public override void PresentStep(int index, PresentationViewController presentationViewController)
{
switch (index)
{
case 0:
break;
case 1:
TextManager.HighlightBullet(0);
StaticShadowNode.Opacity = 1;
var node = TextManager.AddCode("#aMaterial.#multiply#.contents = aShadowMap;#");
node.Position = new SCNVector3(node.Position.X, node.Position.Y - 4, node.Position.Z);
foreach (var child in node.ChildNodes)
{
child.RenderingOrder = 1;
foreach (var m in child.Geometry.Materials)
{
m.ReadsFromDepthBuffer = false;
}
}
break;
case 2:
//move the tree
PalmTree.RunAction(SCNAction.RotateBy(0, NMath.PI * 4, 0, 8));
break;
case 3:
TextManager.FadesIn = true;
TextManager.FadeOutText(SlideTextManager.TextType.Code);
TextManager.AddEmptyLine();
node = TextManager.AddCode("#aLight.#castsShadow# = YES;#");
foreach (SCNNode child in node.ChildNodes)
{
child.RenderingOrder = 1;
foreach (SCNMaterial m in child.Geometry.Materials)
{
m.ReadsFromDepthBuffer = false;
m.WritesToDepthBuffer = false;
}
}
node.Position = new SCNVector3(node.Position.X, node.Position.Y - 6, node.Position.Z);
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 0.75f;
var spot = presentationViewController.SpotLight;
OldSpotShadowColor = spot.Light.ShadowColor;
spot.Light.ShadowColor = NSColor.Black;
spot.Light.ShadowRadius = 3;
var tp = TextManager.TextNode.Position;
var superNode = presentationViewController.CameraNode.ParentNode.ParentNode;
var p0 = GroundNode.ConvertPositionToNode(SCNVector3.Zero, null);
var p1 = GroundNode.ConvertPositionToNode(new SCNVector3(20, 0, 0), null);
var tr = new SCNVector3(p1.X - p0.X, p1.Y - p0.Y, p1.Z - p0.Z);
var p = superNode.Position;
p.X += tr.X;
p.Y += tr.Y;
p.Z += tr.Z;
tp.X += 20;
tp.Y += 0;
tp.Z += 0;
superNode.Position = p;
TextManager.TextNode.Position = tp;
SCNTransaction.Commit();
TextManager.HighlightBullet(1);
break;
case 4:
//move the light
var lightPivot = SCNNode.Create();
lightPivot.Position = Character.Position;
GroundNode.AddChildNode(lightPivot);
spot = presentationViewController.SpotLight;
OldSpotPosition = spot.Position;
OldSpotParent = spot.ParentNode;
OldSpotZNear = spot.Light.ZNear;
spot.Light.ZNear = 20;
spot.Position = lightPivot.ConvertPositionFromNode(spot.Position, spot.ParentNode);
lightPivot.AddChildNode(spot);
//add an object to represent the light
var lightModel = SCNNode.Create();
var lightHandle = SCNNode.Create();
var cone = SCNCone.Create(0, 0.5f, 1);
cone.RadialSegmentCount = 10;
cone.HeightSegmentCount = 5;
lightModel.Geometry = cone;
lightModel.Geometry.FirstMaterial.Emission.Contents = NSColor.Yellow;
lightHandle.Position = new SCNVector3(spot.Position.X * DIST, spot.Position.Y * DIST, spot.Position.Z * DIST);
lightModel.CastsShadow = false;
lightModel.EulerAngles = new SCNVector3(NMath.PI / 2, 0, 0);
lightHandle.AddChildNode(lightModel);
lightHandle.Constraints = new SCNConstraint[] { SCNLookAtConstraint.Create(Character) };
lightPivot.AddChildNode(lightHandle);
LightHandle = lightHandle;
var animation = CABasicAnimation.FromKeyPath("eulerAngles.z");
animation.From = new NSNumber((nfloat)(Math.PI / 4) * 1.7f);
animation.To = new NSNumber((nfloat)(-Math.PI / 4) * 0.3f);
animation.Duration = 4;
animation.AutoReverses = true;
animation.RepeatCount = float.MaxValue;
animation.TimingFunction = CAMediaTimingFunction.FromName(CAMediaTimingFunction.EaseInEaseOut);
animation.TimeOffset = animation.Duration / 2;
lightPivot.AddAnimation(animation, new NSString("lightAnim"));
break;
case 5:
TextManager.FadeOutText(SlideTextManager.TextType.Code);
var text = TextManager.AddCode("#aLight.#shadowMode# =\n#SCNShadowModeModulated#;\naLight.#gobo# = anImage;#");
text.Position = new SCNVector3(text.Position.X, text.Position.Y - 6, text.Position.Z);
text.EnumerateChildNodes((SCNNode child, out bool stop) => {
stop = false;
child.RenderingOrder = 1;
foreach (var m in child.Geometry.Materials)
{
m.ReadsFromDepthBuffer = false;
m.WritesToDepthBuffer = false;
}
return(stop);
});
LightHandle.RemoveFromParentNode();
RestoreSpotPosition(presentationViewController);
TextManager.HighlightBullet(2);
spot = presentationViewController.SpotLight;
spot.Light.CastsShadow = false;
var head = Character.FindChildNode("Bip001_Pelvis", true);
node = SCNNode.Create();
node.Light = SCNLight.Create();
node.Light.LightType = SCNLightType.Spot;
node.Light.SpotOuterAngle = 30;
node.Constraints = new SCNConstraint[] { SCNLookAtConstraint.Create(head) };
node.Position = new SCNVector3(0, 220, 0);
node.Light.ZNear = 10;
node.Light.ZFar = 1000;
node.Light.Gobo.Contents = new NSImage(NSBundle.MainBundle.PathForResource("SharedTextures/blobShadow", "jpg"));
node.Light.Gobo.Intensity = 0.65f;
node.Light.ShadowMode = SCNShadowMode.Modulated;
//exclude character from shadow
node.Light.CategoryBitMask = 0x1;
Character.FindNodes((SCNNode child, out bool stop) => {
stop = false;
child.CategoryBitMask = 0x2;
return(stop);
});
Projector = node;
Character.AddChildNode(node);
break;
}
}