C# PresentationViewController.UpdateLightingWithIntensities方法代码示例

//.........这里部分代码省略.........
			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:
				// 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);

//.........这里部分代码省略.........

		public override void PresentStep (int index, PresentationViewController presentationViewController)
		{
			SCNTransaction.Begin ();
			SCNTransaction.AnimationDuration = 1.0f;

			switch (index) {
			case 0:
				// Set the slide's title and add some code
				TextManager.SetTitle ("Materials");

				TextManager.AddBulletAtLevel ("Diffuse", 0);
				TextManager.AddBulletAtLevel ("Ambient", 0);
				TextManager.AddBulletAtLevel ("Specular and shininess", 0);
				TextManager.AddBulletAtLevel ("Normal", 0);
				TextManager.AddBulletAtLevel ("Reflective", 0);
				TextManager.AddBulletAtLevel ("Emission", 0);
				TextManager.AddBulletAtLevel ("Transparent", 0);
				TextManager.AddBulletAtLevel ("Multiply", 0);

				break;
			case 1:
				EarthNode.Opacity = 1.0f;

				presentationViewController.UpdateLightingWithIntensities (new float[] { 1 });
				break;
			case 2:
				EarthNode.Geometry.FirstMaterial.Diffuse.Contents = NSColor.Blue;

				TextManager.HighlightBullet (0);
				ShowCodeExample ("#material.#diffuse.contents# = [NSColor blueColor];#", null, null);
				break;
			case 3:
				EarthNode.Geometry.FirstMaterial.Diffuse.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/earth-diffuse", "jpg"));

				ShowCodeExample ("#material.#diffuse.contents# =#", "earth-diffuse-mini", "jpg");
				break;
			case 4:
				EarthNode.Geometry.FirstMaterial.Ambient.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/earth-diffuse", "jpg"));
				EarthNode.Geometry.FirstMaterial.Ambient.Intensity = 1;

				TextManager.HighlightBullet (1);
				ShowCodeExample ("#material.#ambient#.contents =#", "earth-diffuse-mini", "jpg");
				presentationViewController.UpdateLightingWithIntensities (LightIntensities);
				break;
			case 5:
				EarthNode.Geometry.FirstMaterial.Shininess = 0.1f;
				EarthNode.Geometry.FirstMaterial.Specular.Contents = NSColor.White;

				TextManager.HighlightBullet (2);
				ShowCodeExample ("#material.#specular#.contents = [NSColor whiteColor];#", null, null);
				break;
			case 6:
				EarthNode.Geometry.FirstMaterial.Specular.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/earth-specular", "jpg"));

				ShowCodeExample ("#material.#specular#.contents =#", "earth-specular-mini", "jpg");
				break;
			case 7:
				EarthNode.Geometry.FirstMaterial.Normal.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/earth-bump", "png"));
				EarthNode.Geometry.FirstMaterial.Normal.Intensity = 1.3f;

				TextManager.HighlightBullet (3);
				ShowCodeExample ("#material.#normal#.contents =#", "earth-bump", "png");
				break;
			case 8:
				EarthNode.Geometry.FirstMaterial.Reflective.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/earth-reflective", "jpg"));
				EarthNode.Geometry.FirstMaterial.Reflective.Intensity = 0.7f;
				EarthNode.Geometry.FirstMaterial.Specular.Intensity = 0.0f;

				SCNTransaction.Begin ();
				SCNTransaction.AnimationDuration = 2.0f;
				SCNTransaction.AnimationTimingFunction = CAMediaTimingFunction.FromName (CAMediaTimingFunction.EaseInEaseOut);
				CameraOriginalPosition = presentationViewController.CameraHandle.Position;
				presentationViewController.CameraHandle.Position = presentationViewController.CameraHandle.ConvertPositionToNode (new SCNVector3 (6, 0, -10.11f), presentationViewController.CameraHandle.ParentNode);
				SCNTransaction.Commit ();

				TextManager.HighlightBullet (4);
				ShowCodeExample ("material.#reflective#.contents =", "earth-reflective", "jpg");
				break;
			case 9:
				SCNTransaction.Begin ();
				SCNTransaction.AnimationDuration = 1.0f;
				SCNTransaction.AnimationTimingFunction = CAMediaTimingFunction.FromName (CAMediaTimingFunction.EaseInEaseOut);
				presentationViewController.CameraHandle.Position = CameraOriginalPosition;
				SCNTransaction.Commit ();
				break;
			case 10:
				EarthNode.Geometry.FirstMaterial.Emission.Contents = new NSImage (NSBundle.MainBundle.PathForResource ("Scenes/earth/earth-emissive", "jpg"));
				EarthNode.Geometry.FirstMaterial.Reflective.Intensity = 0.3f;
				EarthNode.Geometry.FirstMaterial.Emission.Intensity = 0.5f;

				TextManager.HighlightBullet (5);
				ShowCodeExample ("material.#emission#.contents =", "earth-emissive-mini2", "jpg");
				break;
			case 11:
				EarthNode.Geometry.FirstMaterial.Emission.Intensity = 1.0f;
				EarthNode.Geometry.FirstMaterial.Reflective.Intensity = 0.1f;

				ShowCodeExample (null, null, null);
				presentationViewController.UpdateLightingWithIntensities (new float[] { 0.01f }); // keeping the intensity non null avoids an unnecessary shader recompilation
				break;
//.........这里部分代码省略.........