如何拥有旋转的椭圆形状的Java？ [英] How to have rotated Ellipse shape in Java?

问题描述

如何在Java的旋转的椭圆形？即使得其半轴不平行于坐标轴

How to have rotated ellipse Shape in java? I.e. so that its semi-axes are not parallel to coordinate axes?

P.S。我需要的不只是画这个椭圆形，但有它在内存中的形状对象。

P.S. I need not just draw this ellipse but have it in memory as a shape object.

推荐答案

只要采取一个 Ellipse2D的对象并应用的AffineTransform 旋转它，不是吗？

Just take an Ellipse2D object and apply an AffineTransform rotation to it, no?

AffineTransform.getRotateInstance(Math.PI / 4)
  .createTransformedShape(new Ellipse2D.Double(0, 0, 2, 1));

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