安裝pip install Rtree
在使用中，可以對點線面元素進行索引，對于點用一個閾值做外包，對于線面可以求外包，有外包以后就可以把數據插入索引，
然后就可以求相交和臨近。
使用例子：

from rtree import index

class MyIndex(object):
    def __init__(self, pose, distance):
        self.localPos = pose
        self.distance = distance



if __name__ == '__main__':
    idx = index.Index()
    id = 1
    pose = [34.3, 26.7, 49.3, 41.7]
    myIndex = MyIndex(pose,100)
    idx.insert(id, myIndex.localPos, obj = myIndex)
    id += 1

    pose = [40, 45, 55, 56]
    myIndex = MyIndex(pose, 200)
    idx.insert(id, myIndex.localPos, obj=myIndex)
    id += 1
    pose = [50, 45, 60, 56]
    myIndex = MyIndex(pose, 300)
    idx.insert(id, myIndex.localPos, obj=myIndex)
    id += 1
    hits = list(idx.intersection((50, 45, 60, 60), objects=True))

    hits = list(idx.nearest((50, 45, 60, 60),1,True))
    print(hits)