使用 Graphics2D 绘制时矩形的实际边界
当使用 Graphics2D 渲染矩形时，如何可靠地确定矩形的准确范围？
假设我有一个起始于 (20,40) 且宽 200 像素、高 100 像素的矩形：
drawRect (20,40,200,100);
当这是一个用 1 像素笔粗略绘制的简单矩形时，我的问题的答案很简单。但是，当画笔为 2 像素、3 像素或更大时，渲染过程中受影响的确切边界是多少？当使用抗锯齿功能时，矩形会“溢出”到相邻像素吗？
计算将被操纵的精确边界的最可靠方法是什么？
How can I reliably determine the exact extent of a rectangle when it is rendered using Graphics2D?
Suppose I have a rectangle that originates at (20,40) and is 200 pixels wide and 100 pixels tall:
drawRect (20,40,200,100);
The answer to my question is easy when this is a simple rectangle, drawn crudely with a 1-pixel pen. However, what are the exact bounds that are affected in the rendering process when the pen is 2 pixels, 3 pixels, or more? And will the rectangle "spill over" to adjacent pixels when anti-aliasing is used?
What is the most reliable way to calculate the exact bounds that will be manipulated?
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如果您需要知道描边形状的边界，您可以自己描边并检查边界。
If you need to know the bounds of a stroked shape, you can stroke it yourself and check the bounds.