我必须获取Path2D对象中每组坐标的坐标，但我不知道如何。以前我们使用多边形，所以我能够初始化两个长度为Polygon.npoints的数组，然后将它们设置为Polygon.xpoints和Polygon.ypoints数组。现在我们正在使用Path2D对象，我不知道如何做到这一点，因为我似乎只能初始化一个PathIterator，它将一个数组作为输入并返回段？有人可以解释如何获取Path2D对象的所有坐标对吗？
答案 0 :(得分：2)
下面是一个如何获取a的所有段和坐标对的示例
PathIterator：
您反复调用Traceback (most recent call last):
File "C:\Users\sompatha\Anaconda2\envs\Ml\lib\site-packages\IPython\core\interactiveshell.py", line 2862, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-1-eeff7c4f34af>", line 1, in <module>
import numpy as np
File "C:\Users\sompatha\Anaconda2\envs\Ml\lib\site-packages\numpy\__init__.py", line 126, in <module>
from numpy.__config__ import show as show_config
File "C:\Users\sompatha\Anaconda2\envs\Ml\lib\site-packages\numpy\__config__.py", line 5
blas_mkl_info={'library_dirs': ['C:\Users\sompatha\Anaconda2\envs\ML\\Library\\lib'], 'define_macros': [('SCIPY_MKL_H', None), ('HAVE_CBLAS', None)], 'libraries': ['mkl_core_dll', 'mkl_intel_lp64_dll', 'mkl_intel_thread_dll'], 'include_dirs': ['C:\Users\sompatha\Anaconda2\envs\ML\\Library\\include']}
^
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape
的{{3}}方法。
在每次调用时，您都会获得一个段的坐标。
请特别注意，坐标数取决于段类型
（从PathIterator方法获得的返回值）。
currentSegment您可以使用此方法转储任何currentSegment
（因此也适用于public static void dump(Shape shape) {
float[] coords = new float[6];
PathIterator pathIterator = shape.getPathIterator(new AffineTransform());
while (!pathIterator.isDone()) {
switch (pathIterator.currentSegment(coords)) {
case PathIterator.SEG_MOVETO:
System.out.printf("move to x1=%f, y1=%f\n",
coords[0], coords[1]);
break;
case PathIterator.SEG_LINETO:
System.out.printf("line to x1=%f, y1=%f\n",
coords[0], coords[1]);
break;
case PathIterator.SEG_QUADTO:
System.out.printf("quad to x1=%f, y1=%f, x2=%f, y2=%f\n",
coords[0], coords[1], coords[2], coords[3]);
break;
case PathIterator.SEG_CUBICTO:
System.out.printf("cubic to x1=%f, y1=%f, x2=%f, y2=%f, x3=%f, y3=%f\n",
coords[0], coords[1], coords[2], coords[3], coords[4], coords[5]);
break;
case PathIterator.SEG_CLOSE:
System.out.printf("close\n");
break;
}
pathIterator.next();
}
}
，Rectangle，Polygon，Ellipse2D，...）
Path2D