public override void PresentStep(int index, PresentationViewController presentationViewController)
{
switch (index)
{
case 0:
// Set the slide's title and subtitle
TextManager.SetTitle("Scene Graph");
TextManager.SetSubtitle("Summary");
break;
case 1:
// A node that will help visualize the position of the stars
WireframeBoxNode = SCNNode.Create();
WireframeBoxNode.Rotation = new SCNVector4(0, 1, 0, (float)(Math.PI / 4));
WireframeBoxNode.Geometry = SCNBox.Create(1, 1, 1, 0);
WireframeBoxNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage(NSBundle.MainBundle.PathForResource("SharedTextures/box_wireframe", "png"));
WireframeBoxNode.Geometry.FirstMaterial.LightingModelName = SCNLightingModel.Constant; // no lighting
WireframeBoxNode.Geometry.FirstMaterial.DoubleSided = true; // double sided
// Sun
SunNode = SCNNode.Create();
SunNode.Position = new SCNVector3(0, 30, 0);
ContentNode.AddChildNode(SunNode);
SunNode.AddChildNode((SCNNode)WireframeBoxNode.Copy());
// Earth-rotation (center of rotation of the Earth around the Sun)
var earthRotationNode = SCNNode.Create();
SunNode.AddChildNode(earthRotationNode);
// Earth-group (will contain the Earth, and the Moon)
EarthGroupNode = SCNNode.Create();
EarthGroupNode.Position = new SCNVector3(15, 0, 0);
earthRotationNode.AddChildNode(EarthGroupNode);
// Earth
EarthNode = (SCNNode)WireframeBoxNode.Copy();
EarthNode.Position = new SCNVector3(0, 0, 0);
EarthGroupNode.AddChildNode(EarthNode);
// Rotate the Earth around the Sun
var animation = CABasicAnimation.FromKeyPath("rotation");
animation.Duration = 10.0f;
animation.To = NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI * 2)));
animation.RepeatCount = float.MaxValue;
earthRotationNode.AddAnimation(animation, new NSString("earth rotation around sun"));
// Rotate the Earth
animation = CABasicAnimation.FromKeyPath("rotation");
animation.Duration = 1.0f;
animation.From = NSValue.FromVector(new SCNVector4(0, 1, 0, 0));
animation.To = NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI * 2)));
animation.RepeatCount = float.MaxValue;
EarthNode.AddAnimation(animation, new NSString("earth rotation"));
break;
case 2:
// Moon-rotation (center of rotation of the Moon around the Earth)
var moonRotationNode = SCNNode.Create();
EarthGroupNode.AddChildNode(moonRotationNode);
// Moon
MoonNode = (SCNNode)WireframeBoxNode.Copy();
MoonNode.Position = new SCNVector3(5, 0, 0);
moonRotationNode.AddChildNode(MoonNode);
// Rotate the moon around the Earth
animation = CABasicAnimation.FromKeyPath("rotation");
animation.Duration = 1.5f;
animation.To = NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI * 2)));
animation.RepeatCount = float.MaxValue;
moonRotationNode.AddAnimation(animation, new NSString("moon rotation around earth"));
// Rotate the moon
animation = CABasicAnimation.FromKeyPath("rotation");
animation.Duration = 1.5f;
animation.To = NSValue.FromVector(new SCNVector4(0, 1, 0, (float)(Math.PI * 2)));
animation.RepeatCount = float.MaxValue;
MoonNode.AddAnimation(animation, new NSString("moon rotation"));
break;
case 3:
// Add geometries (spheres) to represent the stars
SunNode.Geometry = SCNSphere.Create(2.5f);
EarthNode.Geometry = SCNSphere.Create(1.5f);
MoonNode.Geometry = SCNSphere.Create(0.75f);
// Add a textured plane to represent Earth's orbit
var earthOrbit = SCNNode.Create();
earthOrbit.Opacity = 0.4f;
earthOrbit.Geometry = SCNPlane.Create(31, 31);
earthOrbit.Geometry.FirstMaterial.Diffuse.Contents = new NSImage(NSBundle.MainBundle.PathForResource("Scenes/earth/orbit", "png"));
earthOrbit.Geometry.FirstMaterial.Diffuse.MipFilter = SCNFilterMode.Linear;
earthOrbit.Rotation = new SCNVector4(1, 0, 0, -(float)(Math.PI / 2));
earthOrbit.Geometry.FirstMaterial.LightingModelName = SCNLightingModel.Constant; // no lighting
SunNode.AddChildNode(earthOrbit);
break;
case 4:
// Add a halo to the Sun (a simple textured plane that does not write to depth)
SunHaloNode = SCNNode.Create();
SunHaloNode.Geometry = SCNPlane.Create(30, 30);
SunHaloNode.Rotation = new SCNVector4(1, 0, 0, Pitch * (float)(Math.PI / 180.0f));
SunHaloNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage(NSBundle.MainBundle.PathForResource("Scenes/earth/sun-halo", "png"));
SunHaloNode.Geometry.FirstMaterial.LightingModelName = SCNLightingModel.Constant; // no lighting
SunHaloNode.Geometry.FirstMaterial.WritesToDepthBuffer = false; // do not write to depth
SunHaloNode.Opacity = 0.2f;
SunNode.AddChildNode(SunHaloNode);
// Add materials to the stars
EarthNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage(NSBundle.MainBundle.PathForResource("Scenes/earth/earth-diffuse-mini", "jpg"));
EarthNode.Geometry.FirstMaterial.Emission.Contents = new NSImage(NSBundle.MainBundle.PathForResource("Scenes/earth/earth-emissive-mini", "jpg"));
EarthNode.Geometry.FirstMaterial.Specular.Contents = new NSImage(NSBundle.MainBundle.PathForResource("Scenes/earth/earth-specular-mini", "jpg"));
MoonNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage(NSBundle.MainBundle.PathForResource("Scenes/earth/moon", "jpg"));
SunNode.Geometry.FirstMaterial.Multiply.Contents = new NSImage(NSBundle.MainBundle.PathForResource("Scenes/earth/sun", "jpg"));
SunNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage(NSBundle.MainBundle.PathForResource("Scenes/earth/sun", "jpg"));
SunNode.Geometry.FirstMaterial.Multiply.Intensity = 0.5f;
SunNode.Geometry.FirstMaterial.LightingModelName = SCNLightingModel.Constant;
SunNode.Geometry.FirstMaterial.Multiply.WrapS =
SunNode.Geometry.FirstMaterial.Diffuse.WrapS =
SunNode.Geometry.FirstMaterial.Multiply.WrapT =
SunNode.Geometry.FirstMaterial.Diffuse.WrapT = SCNWrapMode.Repeat;
EarthNode.Geometry.FirstMaterial.LocksAmbientWithDiffuse =
MoonNode.Geometry.FirstMaterial.LocksAmbientWithDiffuse =
SunNode.Geometry.FirstMaterial.LocksAmbientWithDiffuse = true;
EarthNode.Geometry.FirstMaterial.Shininess = 0.1f;
EarthNode.Geometry.FirstMaterial.Specular.Intensity = 0.5f;
MoonNode.Geometry.FirstMaterial.Specular.Contents = NSColor.Gray;
// Achieve a lava effect by animating textures
animation = CABasicAnimation.FromKeyPath("contentsTransform");
animation.Duration = 10.0f;
var animationTransform1 = CATransform3D.MakeTranslation(0, 0, 0);
animationTransform1 = animationTransform1.Concat(CATransform3D.MakeScale(3, 3, 3));
var animationTransform2 = CATransform3D.MakeTranslation(1, 0, 0);
animationTransform2 = animationTransform1.Concat(CATransform3D.MakeScale(3, 3, 3));
animation.From = NSValue.FromCATransform3D(animationTransform1);
animation.To = NSValue.FromCATransform3D(animationTransform2);
animation.RepeatCount = float.MaxValue;
SunNode.Geometry.FirstMaterial.Diffuse.AddAnimation(animation, new NSString("sun-texture"));
animation = CABasicAnimation.FromKeyPath("contentsTransform");
animation.Duration = 30.0f;
animationTransform1 = CATransform3D.MakeTranslation(0, 0, 0);
animationTransform1 = animationTransform1.Concat(CATransform3D.MakeScale(5, 5, 5));
animationTransform2 = CATransform3D.MakeTranslation(1, 0, 0);
animationTransform2 = animationTransform1.Concat(CATransform3D.MakeScale(5, 5, 5));
animation.From = NSValue.FromCATransform3D(animationTransform1);
animation.To = NSValue.FromCATransform3D(animationTransform2);
animation.RepeatCount = float.MaxValue;
SunNode.Geometry.FirstMaterial.Multiply.AddAnimation(animation, new NSString("sun-texture2"));
break;
case 5:
// We will turn off all the lights in the scene and add a new light
// to give the impression that the Sun lights the scene
var lightNode = SCNNode.Create();
lightNode.Light = SCNLight.Create();
lightNode.Light.Color = NSColor.Black; // initially switched off
lightNode.Light.LightType = SCNLightType.Omni;
SunNode.AddChildNode(lightNode);
// Configure attenuation distances because we don't want to light the floor
lightNode.Light.SetAttribute(new NSNumber(20), SCNLightAttribute.AttenuationEndKey);
lightNode.Light.SetAttribute(new NSNumber(19.5), SCNLightAttribute.AttenuationStartKey);
// Animation
SCNTransaction.Begin();
SCNTransaction.AnimationDuration = 1;
lightNode.Light.Color = NSColor.White; // switch on
presentationViewController.UpdateLightingWithIntensities(new float[] { 0.0f }); //switch off all the other lights
SunHaloNode.Opacity = 0.5f; // make the halo stronger
SCNTransaction.Commit();
break;
}
}
public override void PresentStep (int index, PresentationViewController presentationViewController)
{
switch (index) {
case 0:
// Set the slide's title and subtitle
TextManager.SetTitle ("Scene Graph");
TextManager.SetSubtitle ("Summary");
break;
case 1:
// A node that will help visualize the position of the stars
WireframeBoxNode = SCNNode.Create ();
WireframeBoxNode.Rotation = new SCNVector4 (0, 1, 0, (float)(Math.PI / 4));
WireframeBoxNode.Geometry = SCNBox.Create (1, 1, 1, 0);
WireframeBoxNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("SharedTextures/box_wireframe", "png"));
WireframeBoxNode.Geometry.FirstMaterial.LightingModelName = SCNLightingModel.Constant; // no lighting
WireframeBoxNode.Geometry.FirstMaterial.DoubleSided = true; // double sided
// Sun
SunNode = SCNNode.Create ();
SunNode.Position = new SCNVector3 (0, 30, 0);
ContentNode.AddChildNode (SunNode);
SunNode.AddChildNode ((SCNNode)WireframeBoxNode.Copy ());
// Earth-rotation (center of rotation of the Earth around the Sun)
var earthRotationNode = SCNNode.Create ();
SunNode.AddChildNode (earthRotationNode);
// Earth-group (will contain the Earth, and the Moon)
EarthGroupNode = SCNNode.Create ();
EarthGroupNode.Position = new SCNVector3 (15, 0, 0);
earthRotationNode.AddChildNode (EarthGroupNode);
// Earth
EarthNode = (SCNNode)WireframeBoxNode.Copy ();
EarthNode.Position = new SCNVector3 (0, 0, 0);
EarthGroupNode.AddChildNode (EarthNode);
// Rotate the Earth around the Sun
var animation = CABasicAnimation.FromKeyPath ("rotation");
animation.Duration = 10.0f;
animation.To = NSValue.FromVector (new SCNVector4 (0, 1, 0, (float)(Math.PI * 2)));
animation.RepeatCount = float.MaxValue;
earthRotationNode.AddAnimation (animation, new NSString ("earth rotation around sun"));
// Rotate the Earth
animation = CABasicAnimation.FromKeyPath ("rotation");
animation.Duration = 1.0f;
animation.From = NSValue.FromVector (new SCNVector4 (0, 1, 0, 0));
animation.To = NSValue.FromVector (new SCNVector4 (0, 1, 0, (float)(Math.PI * 2)));
animation.RepeatCount = float.MaxValue;
EarthNode.AddAnimation (animation, new NSString ("earth rotation"));
break;
case 2:
// Moon-rotation (center of rotation of the Moon around the Earth)
var moonRotationNode = SCNNode.Create ();
EarthGroupNode.AddChildNode (moonRotationNode);
// Moon
MoonNode = (SCNNode)WireframeBoxNode.Copy ();
MoonNode.Position = new SCNVector3 (5, 0, 0);
moonRotationNode.AddChildNode (MoonNode);
// Rotate the moon around the Earth
animation = CABasicAnimation.FromKeyPath ("rotation");
animation.Duration = 1.5f;
animation.To = NSValue.FromVector (new SCNVector4 (0, 1, 0, (float)(Math.PI * 2)));
animation.RepeatCount = float.MaxValue;
moonRotationNode.AddAnimation (animation, new NSString ("moon rotation around earth"));
// Rotate the moon
animation = CABasicAnimation.FromKeyPath ("rotation");
animation.Duration = 1.5f;
animation.To = NSValue.FromVector (new SCNVector4 (0, 1, 0, (float)(Math.PI * 2)));
animation.RepeatCount = float.MaxValue;
MoonNode.AddAnimation (animation, new NSString ("moon rotation"));
break;
case 3:
// Add geometries (spheres) to represent the stars
SunNode.Geometry = SCNSphere.Create (2.5f);
EarthNode.Geometry = SCNSphere.Create (1.5f);
MoonNode.Geometry = SCNSphere.Create (0.75f);
// Add a textured plane to represent Earth's orbit
var earthOrbit = SCNNode.Create ();
earthOrbit.Opacity = 0.4f;
earthOrbit.Geometry = SCNPlane.Create (31, 31);
earthOrbit.Geometry.FirstMaterial.Diffuse.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/orbit", "png"));
earthOrbit.Geometry.FirstMaterial.Diffuse.MipFilter = SCNFilterMode.Linear;
earthOrbit.Rotation = new SCNVector4 (1, 0, 0, -(float)(Math.PI / 2));
earthOrbit.Geometry.FirstMaterial.LightingModelName = SCNLightingModel.Constant; // no lighting
SunNode.AddChildNode (earthOrbit);
break;
case 4:
// Add a halo to the Sun (a simple textured plane that does not write to depth)
SunHaloNode = SCNNode.Create ();
SunHaloNode.Geometry = SCNPlane.Create (30, 30);
SunHaloNode.Rotation = new SCNVector4 (1, 0, 0, Pitch * (float)(Math.PI / 180.0f));
SunHaloNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/sun-halo", "png"));
SunHaloNode.Geometry.FirstMaterial.LightingModelName = SCNLightingModel.Constant; // no lighting
SunHaloNode.Geometry.FirstMaterial.WritesToDepthBuffer = false; // do not write to depth
SunHaloNode.Opacity = 0.2f;
SunNode.AddChildNode (SunHaloNode);
// Add materials to the stars
EarthNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/earth-diffuse-mini", "jpg"));
EarthNode.Geometry.FirstMaterial.Emission.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/earth-emissive-mini", "jpg"));
EarthNode.Geometry.FirstMaterial.Specular.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/earth-specular-mini", "jpg"));
MoonNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/moon", "jpg"));
SunNode.Geometry.FirstMaterial.Multiply.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/sun", "jpg"));
SunNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/sun", "jpg"));
SunNode.Geometry.FirstMaterial.Multiply.Intensity = 0.5f;
SunNode.Geometry.FirstMaterial.LightingModelName = SCNLightingModel.Constant;
SunNode.Geometry.FirstMaterial.Multiply.WrapS =
SunNode.Geometry.FirstMaterial.Diffuse.WrapS =
SunNode.Geometry.FirstMaterial.Multiply.WrapT =
SunNode.Geometry.FirstMaterial.Diffuse.WrapT = SCNWrapMode.Repeat;
EarthNode.Geometry.FirstMaterial.LocksAmbientWithDiffuse =
MoonNode.Geometry.FirstMaterial.LocksAmbientWithDiffuse =
SunNode.Geometry.FirstMaterial.LocksAmbientWithDiffuse = true;
EarthNode.Geometry.FirstMaterial.Shininess = 0.1f;
EarthNode.Geometry.FirstMaterial.Specular.Intensity = 0.5f;
MoonNode.Geometry.FirstMaterial.Specular.Contents = NSColor.Gray;
// Achieve a lava effect by animating textures
animation = CABasicAnimation.FromKeyPath ("contentsTransform");
animation.Duration = 10.0f;
var animationTransform1 = CATransform3D.MakeTranslation (0, 0, 0);
animationTransform1 = animationTransform1.Concat (CATransform3D.MakeScale (3, 3, 3));
var animationTransform2 = CATransform3D.MakeTranslation (1, 0, 0);
animationTransform2 = animationTransform1.Concat (CATransform3D.MakeScale (3, 3, 3));
animation.From = NSValue.FromCATransform3D (animationTransform1);
animation.To = NSValue.FromCATransform3D (animationTransform2);
animation.RepeatCount = float.MaxValue;
SunNode.Geometry.FirstMaterial.Diffuse.AddAnimation (animation, new NSString ("sun-texture"));
animation = CABasicAnimation.FromKeyPath ("contentsTransform");
animation.Duration = 30.0f;
animationTransform1 = CATransform3D.MakeTranslation (0, 0, 0);
animationTransform1 = animationTransform1.Concat (CATransform3D.MakeScale (5, 5, 5));
animationTransform2 = CATransform3D.MakeTranslation (1, 0, 0);
animationTransform2 = animationTransform1.Concat (CATransform3D.MakeScale (5, 5, 5));
animation.From = NSValue.FromCATransform3D (animationTransform1);
animation.To = NSValue.FromCATransform3D (animationTransform2);
animation.RepeatCount = float.MaxValue;
SunNode.Geometry.FirstMaterial.Multiply.AddAnimation (animation, new NSString ("sun-texture2"));
break;
case 5:
// We will turn off all the lights in the scene and add a new light
// to give the impression that the Sun lights the scene
var lightNode = SCNNode.Create ();
lightNode.Light = SCNLight.Create ();
lightNode.Light.Color = NSColor.Black; // initially switched off
lightNode.Light.LightType = SCNLightType.Omni;
SunNode.AddChildNode (lightNode);
// Configure attenuation distances because we don't want to light the floor
lightNode.Light.SetAttribute (new NSNumber (20), SCNLightAttribute.AttenuationEndKey);
lightNode.Light.SetAttribute (new NSNumber (19.5), SCNLightAttribute.AttenuationStartKey);
// Animation
SCNTransaction.Begin ();
SCNTransaction.AnimationDuration = 1;
lightNode.Light.Color = NSColor.White; // switch on
presentationViewController.UpdateLightingWithIntensities (new float[] { 0.0f }); //switch off all the other lights
SunHaloNode.Opacity = 0.5f; // make the halo stronger
SCNTransaction.Commit ();
break;
}
}