[JAVA][Beginning Java 8 Games Development]

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Chapter 4 ■ An Introduction to JavaFX 8: Exploring the Capabilities of the Java 8 Multimedia Engine The SnapshotResult class (and, more important, the object created using this class) contains your resulting snapshot image data, the parameters that generated it, and the source node in the scene graph that it was generated from. For this reason, the three methods supported by the class should be obvious: the .getImage() method will get a snapshot image, the .getSource() method gets the source node information, and the .getSnapshotParameters() method will get the SnapshotParameters object contents. Scene Subpackages: The 13 Other Scene Packages You may be thinking, “Whew! That was a lot to cover in that javafx.scene package overview!,” and indeed the core javafx.scene package has a lot of classes in it, covering scene creation; scene graph organization; and scene utilities, such as lighting, cameras, cursors, and screenshots (or should we call these sceneshots?). There is a lot more in the javafx.scene package, in subpackages, as I call them, or packages that are below the javafx.scene package, referenced using another dot and another package name (description). In fact, there are 13 more javafx.scene packages (see in Table 4-1), covering things such as drawing, painting, charting, UI design, imaging, special effects, media (audio and video) playback, input-output, text, shapes (2D geometry), transforms, and web page (content created with HTML5, JavaScript and CSS3) rendering. You are going to explore these scene package classes in this section. Table 4-1. Thirteen Second-Level JavaFX Scene Subpackages, Their Primary Functions, and a Description of Classes Package Name Functions Description of Contents javafx.scene.canvas Drawing Canvas class (and Canvas object); for a custom drawing surface javafx.scene.chart Charting Chart classes: PieChart, LineChart, XYChart, BarChart, AreaChart, BubbleChart javafx.scene.control UI controls UI control classes: Button, Menu, Slider, Label, ScrollBar, TextField javafx.scene.effect Special effects Special effects classes: Glow, Blend, Bloom, Shadow, Reflection, MotionBlur javafx.scene.image imaging Digital imaging classes: Image, ImageView, WritableImageView, PixelFormat javafx.scene.input Input (Events) Classes related to getting input from the user into the JavaFX application javafx.scene.layout UI layouts UI layout container classes: TilePane, GridPane, FlowPane, Border javafx.scene.media Media player Media playback classes: MediaPlayer, MediaView, Track, AudioTrack, AudioClip javafx.scene.paint Painting Paint classes: Paint, Color, LinearGradient, RadialGradient, Stop, Material, and so on javafx.scene.shape Geometry 2D and 3D geometry classes: Mesh, Shape, Shape3D, Arc, Circle, Line, Path, and so on javafx.scene.text Text and font Text rendering and font rendering classes: Font, Text, TextFlow, and so on javafx.scene.transform Transforms Transform classes: Transform, Scale, Rotate, Shear, Translate, Affine javafx.scene.web WebKit Web support classes: WebView, WebEvent, WebEngine, HTMLEditor 82 www.it-ebooks.info
Chapter 4 ■ An Introduction to JavaFX 8: Exploring the Capabilities of the Java 8 Multimedia Engine Let’s start with the packages that have the fewest classes. The table lists subpackages alphabetically, but the first one, javafx.scene.canvas, coincidentally contains only one class, the Canvas class, which, as its name suggests, is employed to create a Canvas object that is used as a canvas for you to create things with! The next subpackage listed is javafx.scene.chart; this has charting classes, such as PieChart, LineChart, XYChart, BarChart, AreaChart, and BubbleChart, for use in business applications, which is a different book entirely, so I will not be covering charting. The next subpackage, javafx.scene.control, offers all the UI control (“widget,” in Android) classes, such as Button, Menu, CheckBox, RadioButton, DatePicker, ColorPicker, ProgressBar, Slider, Label, Scrollbar, and TextField and about eight dozen others. Because there are approximately a hundred classes in javafx.scene.control, I am not even going to attempt to cover it here; an entire book could probably be written about this subpackage! If you want to review these classes, simply reference “javafx.scene.control” on Google or on the Oracle Java website, and you can peruse what these classes can do for days on end. For this subpackage, “reference” is the key word, as you will want to reference this package and its classes individually at the time you need to implement a given UI element. The next subpackage, javafx.scene.effect, provides all the special effects classes, almost two dozen of them. These can be very useful for Java 8 game development, so this is one of the few subpackages that I am going to cover in detail in this section. The javafx.scene.image subpackage is used to implement digital imagery within JavaFX, and it has the Image, ImageView, WritableImage, PixelFormat, and WritablePixelFormat classes. The ImageView class is what you will normally use to hold your digital image assets, and the more advanced PixelFormat classes let you create digital imagery on a pixel-by-pixel basis if you want to do more advanced (algorithmic) pixel-based digital image creation. The javafx.scene.input subpackage includes classes that are used to get input from the JavaFX application’s user. This input is processed using the event handling capabilities, which you will be examining in great detail over the course of this book and which you have already experienced in your JavaFX application, in Chapter 3 (see Figure 3-2, ll. 22 to 24). The javafx.scene.layout subpackage contains classes that are used to create UI design layouts and that can be used for your screen layout designs as well. These layout classes include classes that control and manage backgrounds; add and style borders; and provide UI pane management, such as StackPane, TilePane, GridPane, FlowPane, and AnchorPane. These UI classes offer automatic screen layout algorithms for the UI controls in JavaFX. The Background class (and subclasses) furnishes screen background utilities, and the Border class (and its subclasses) supplies screen border utilities, which can be used for spicing up the graphics design for your UI screens. The javafx.scene.media subpackage holds classes that are used for the playback of audio or video media, including the Media, MediaPlayer, and MediaView classes. The Media class (or object, actually) references and contains the media (audio or video) asset, MediaPlayer plays that asset, and MediaView (in the case of video) displays the asset. This subpackage also has a Track superclass and AudioTrack, VideoTrack, and SubtitleTrack subclasses as well as the AudioClip, AudioEqualizer, and EquilizerBand classes, which provide advanced audio (equalizer) controls and short-form audio clips, or snippets of audio that are perfect for use in games. You will be using the AudioClip class later in the book (see Chapter 15). The javafx.scene.paint subpackage contains a Stop class and the Paint superclass and its Color, ImagePattern, LinearGradient, and RadialGradient subclasses as well as the Material superclass and its PhongMaterial subclass. Those of you who are familiar with 3D content production will recognize this Phong shader algorithm, which will allow different surface looks (plastic, rubber, and so on) to be simulated. The Material and PhongMaterial classes need 3D capabilities to be present on the playback hardware to function successfully, just like the SceneAntialiasing, PerspectiveCamera, and LightBase class (and subclasses). The Paint class creates your Paint object, the Color class colors this object (fills it with a color), the LinearGradient and RadialGradient classes fill the Paint object with color gradients, and the Stop class lets you define where gradient colors start and stop inside the gradients. Finally, there is an ImagePattern class, which can fill a Paint object with a tileable image pattern (this can be quite useful for games). The javafx.scene.shape subpackage provides classes for 2D geometry (commonly referred to as shapes) as well as for 3D geometry (commonly referred to as meshes). A Mesh superclass and its TriangleMesh subclass handle 3D geometry, as do the Shape3D superclass and its Box, Sphere, Cylinder, and MeshView subclasses. The Shape superclass has many more subclasses (11); these are 2D geometry elements and include the Arc, Circle, CubicCurve, Ellipse, Line, Path, Polygon, Polyline, QuadCurve, Rectangle, and SVGPath classes. A path support, a path being defined as an open shape (I like to call it a spline, as I am a 3D modeler), is also supplied by the PathElement superclass and its ArcTo, ClosePath, CubicCurveTo, HLineTo, LineTo, MoveTo, QuadCurveTo, and VLineTo subclasses, which allows you to draw spline curves to create your own custom shapes! www.it-ebooks.info 83
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Contents at a Glance About the Auth
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Introduction The Java Programming L
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■ Introduction In Chapter 13 you
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Chapter 1 ■ Setting Up a Java 8 G
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Chapter 15 Implementing Game Audio
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Chapter 17 ■ Enhancing Game Play:
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■ index Background image (cont.)
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■ index InvinciBagel animation (c
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■ index Modifier keywords access
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Beginning Java 8 Games Development
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This Java 8 Game Development book i
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■ Contents NetBeans 8.0 Is User I
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■ Contents ■■Chapter 5: An In
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■ Contents Creating a Hero Superc
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■ Contents Organizing the .update
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■ Contents Optimizing the Scene G
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About the Author Wallace Jackson ha
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Acknowledgments I would like to ack
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