August 2017
Intermediate to advanced
360 pages
8h 35m
Chinese
Content preview from 算法技术手册（原书第2 版）
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288
｜
第
10
章
示例应用，其中有一些移动的正方形在窗口中来回跳动，该应用能够识别这些正方
形的碰撞。具有交集的正方形进行了高亮显示。
四叉树小结
最好情况、平均情况和最坏情况：
O
(log
n
)
add (node, pt)
if node.region does not contain pt then
return false
if node is leaf node then
if node already contains pt then
❶
return false
if node has < 4 points then
❷
add pt to node
return true
q = quadrant for pt in node
if node is leaf node then
node.subdivide()
❸
return add(node.children[q], pt)
❹
range (node, rect, result)
if rect contains node.region then
❺
add (node, true) to result
else if node is leaf node then
foreach point p in node do
if rect contains p then
add (p, false) to result
❻
else
foreach ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.