[JAVA][Beginning Java 8 Games Development]

Chapter 14 ■ Setting Up the Game Environment: Creating Fixed Sprite Classes Using the Actor Superclass
}
public Prop(String SVGdata, double xLocation, double yLocation, Image... spriteCels) {
super(SVGdata, xLocation, yLocation, spriteCels);
spriteFrame.setTranslateX(xLocation);
spriteFrame.setTranslateY(yLocation);
}
@Override
public void update() {
// empty method
}
As you can see in Figure 14-8, this Java code is error-free, and everything that is needed to define and place a
prop in the Scene (on the Stage) is in place, thanks to good design of the Actor (fixed) sprite class. This includes SVG
collision shape data, the X and Y location (placement in the scene), and one or more Image assets. The reason that we
included an .update() method in a fixed sprite class is to allow us to have animated (more than one Image cel) props if
we want to get fancy later on in our game design process, and ratchet up the wow factor of the game’s visual design.
Figure 14-8. Position a fixed sprite on the Stage in the constructor method using a .setTranslateX() and .setTranslateY()
Next let’s create PropH, PropV, and PropB (which stands for “both”) classes. These will automatically mirror
props for us around the X, Y or X and Y axes using the constructor method, so the object will inherently mirror images.
Mirrored Prop Classes: Set the isFlip Property in the Constructor
To make our process of building scenes easier, since everything (collision, location, animation) is part of a constructor
method call, the difference between props is how they are mirrored (X or Y axis, or both axes). In this section, we are
going to create variants of the Prop class that flip sprites for us, inside of a constructor method, so that all we have to
do to get the effect we want is create that PropX object type. Create the first PropH class, as is shown in Figure 14-9.
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