如何在 Java 中绘制 Bézier 路径的控制点？
我创建了一条贝塞尔曲线路径，绘制路径效果很好。但我不知道如何将控制点与路径一起绘制。这是可能的还是我必须在另一个数据结构中跟踪它们？
更新：我想绘制控制点的原因是，我将让用户使用控制点上的手柄来编辑曲线。
我正在使用以下命令创建路径：
Path2D.Double path = new Path2D.Double();
path.moveTo(0,0);
path.curveTo(5, 6, 23, 12, 45, 54);
path.curveTo(34, 23, 12, 34, 2, 3);
并使用以下命令绘制它：
g2.draw(path);
我已经按照 trashgod 的建议使用 PathIterator 进行了测试，但是如果我想要这样管理曲线将很难用户能够编辑控制点。
I have created a Path of Bézier curves and it works fine to draw the path. But I don't know How I can draw the Control Points together with the Path. Is that possible or do I have to keep track of them in another datastructure?
Update: The reason to why I want to draw the control points, is that I will let the user to edit the curves using handles on the control points.
I am creating the path with:
Path2D.Double path = new Path2D.Double();
path.moveTo(0,0);
path.curveTo(5, 6, 23, 12, 45, 54);
path.curveTo(34, 23, 12, 34, 2, 3);
And drawing it with:
g2.draw(path);
I have tested with PathIterator as trashgod suggested, but it will be hard to manage the curves that way if I want the user to be able to edit the control points.
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您可以获得
PathIterator来引用Shape中每个点的坐标数组。编辑时，您可以使用它们沿曲线绘制调整大小手柄和控制点。以下是使用自定义曲线实现进行编辑的示例。You can obtain a
PathIteratorto reference the array of coordinates for each point in theShape. You can use these to draw resize handles and control points along the curve when editing. Here's an example of editing using a custom curve implementation.