BallPoint class

Point类中主要存储了点的坐标(x,y,z)和要显示的文字(data)。 考虑到球体处于持续动画的状态，如果在渲染每帧动画时去实时地计算渲染文字的Paragraph对象， 那么对系统机能是一个很大的负担，可能会造成画面卡顿。因此，这里采取的做法是，在控件初始化时， 预先计算好点在不同Z坐标时的Paragraph对象并缓存起来(paragraphs)，后面渲染动画时直接通过getParagraph(int radius)方法去缓存中取。 同时为了节约内存，每三个相邻的Z坐标只生成一个Paragraph对象。

Constructors

BallPoint.new(double x, double y, double z)

Properties

data ↔ RBallTagData

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

paragraphs ↔ List<Paragraph>

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

x ↔ double

getter/setter pair

y ↔ double

getter/setter pair

z ↔ double

getter/setter pair

Methods

getParagraph(int radius) → dynamic

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited