A great feature of the JPA cache is that no coding change is necessary to use them; you just need some configuration properties (like size and object types to cache) in your persistence.xml file.
jpa缓存有一个很好的特性，即使用时不需要任何代码更改；仅需在persistence .xml文件中修改一些配置属性(比如缓存的大小和对象类型)。
A value of -1 flips the scaled object but does not change its vertical size.
如果值为—1，则翻转缩放对象，但不更改其垂直大小。
Are there any easy way to change the size of an object and the physics automatically fit to the new size or I have to rewrite them?
有什么简单的方法来自动改变物体的物理尺寸和适应新的尺寸或我不得不重写他们吗？
A value of -1 flips the scaled object but does not change its horizontal size.
值- 1会翻转缩放的物件，但是不会变更它的水平大小。
A value of -1 flips the scaled object but does not change its horizontal size.
值- 1会翻转缩放的物件，但是不会变更它的水平大小。
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