四边形接受八个参数，代表的是这个四边形的四个顶点。
The quadrilateral takes eight arguments representing the four points of the quadrilateral.
这些星星组成了一个平行四边形-对边等长且平行的四边形。
These stars form a parallelogram – a four-sided figure with its opposite sides equally long and parallel to one another.
四边形的四边形与点变换？
Transform from quadrilateral to quadrilateral with AffineTransform?
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