Php 高级MySQL区域成本

我对MySQL有点熟悉，但是想到实现这个功能，我的大脑会很受伤。我需要一个系统，你可以设置一个区域的“成本”，比如坐标X=20y=20width=20height=20，成本为每像素15，现在如果你在这个区域内放置另一个区域，比如X=25，Y=25，WIDTH=10，HEIGHT=10，成本为每像素5，之前的区域被分解成4个部分，中间部分被擦除，以利于这个区域

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我还希望能够计算特定像素之间区域的“成本”。希望我已经以你们大多数人都能理解的方式解释了这一点。我不知道从哪里开始。

我会先存储所有具有优先级的区域，然后逐像素计算成本

因此，单个像素的成本为：

select c.*
from costs c
where PIXELX between c.x and c.x + c.deltax and PIXELY between c.y + c.deltay
order by priority desc
limit 1

要将其扩展到一个像素区域，可以将该区域扩展为一组像素。我建议使用

numbers

表来帮助您：

select x.num as x, y.num as y
from numbers x cross join
     numbers y
where x.num between PIXELX and PIXELX and DELTAX and
      y.num between PIXELY and PIXELY and DELTAY

现在，结合这些想法，获得给定像素的所有可能成本：

select x.num as x, y.num as y, max(priority) as maxpriority
from numbers x cross join
     numbers y join
     costs c
     on x.num between c.x and c.x + c.deltax and y.num between c.y + c.deltay
where x.value between PIXELX and PIXELX and DELTAX and
      y.value between PIXELY and PIXELY and DELTAY
group by x.num, y.num

最后，加入给定优先级的成本：

select sum(c.cost)
from (select x.num as x, y.num as y, max(priority) as maxpriority
      from numbers x cross join
           numbers y join
           costs c
           on x.num between c.x and c.x + c.deltax and y.num between c.y + c.deltay
      where x.value between PIXELX and PIXELX and DELTAX and
            y.value between PIXELY and PIXELY and DELTAY
      group by x.num, y.num
    ) xyp join
    costs c
    on  xyp.x between c.x and c.x + c.deltax and xyp.y between c.y + c.deltay and
        xyp.maxpriority = c.priority

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我将通过优先存储所有区域，然后逐像素获取成本来实现这一点

因此，单个像素的成本为：

select c.*
from costs c
where PIXELX between c.x and c.x + c.deltax and PIXELY between c.y + c.deltay
order by priority desc
limit 1

要将其扩展到一个像素区域，可以将该区域扩展为一组像素。我建议使用

numbers

表来帮助您：

select x.num as x, y.num as y
from numbers x cross join
     numbers y
where x.num between PIXELX and PIXELX and DELTAX and
      y.num between PIXELY and PIXELY and DELTAY

现在，结合这些想法，获得给定像素的所有可能成本：

select x.num as x, y.num as y, max(priority) as maxpriority
from numbers x cross join
     numbers y join
     costs c
     on x.num between c.x and c.x + c.deltax and y.num between c.y + c.deltay
where x.value between PIXELX and PIXELX and DELTAX and
      y.value between PIXELY and PIXELY and DELTAY
group by x.num, y.num

最后，加入给定优先级的成本：

select sum(c.cost)
from (select x.num as x, y.num as y, max(priority) as maxpriority
      from numbers x cross join
           numbers y join
           costs c
           on x.num between c.x and c.x + c.deltax and y.num between c.y + c.deltay
      where x.value between PIXELX and PIXELX and DELTAX and
            y.value between PIXELY and PIXELY and DELTAY
      group by x.num, y.num
    ) xyp join
    costs c
    on  xyp.x between c.x and c.x + c.deltax and xyp.y between c.y + c.deltay and
        xyp.maxpriority = c.priority

一想到要实现这个功能，我的大脑就痛了

是的，我也是！六羟甲基三聚氰胺六甲醚。。。不过，这听起来确实很熟悉——因为以前在网上就已经做过了

也许你可以改为使用或改编一个预先制作的解决方案，比如谷歌的“像素广告脚本”

一想到要实现这个功能，我的大脑就痛了

是的，我也是！六羟甲基三聚氰胺六甲醚。。。不过，这听起来确实很熟悉——因为以前在网上就已经做过了

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也许你可以改为使用或改编一个预先制作的解决方案，比如谷歌的“像素广告脚本”。

为什么之前的区域被分成4个部分？与其说是编程问题，不如说是数学问题+1。我碰巧认为这是一个非常有趣的数据库问题。如果您要添加一个可能的数据库模式，这可能会向人们显示您所追求的目标。我已经尝试了解该模式很长一段时间了：（为什么前一个领域被分为4个部分？与其说是编程问题，不如说是数学问题+1…我碰巧认为这是一个非常有趣的数据库问题。+1给你一些视图。如果你想添加一个可能的数据库模式，这可能会向人们展示你的目标。我已经尝试弄清楚该模式有相当一段时间了：（这是真实的生活。那是两张分开的桌子，对吗？它们的结构看起来怎么样？有人吗？这看起来像是中国的。这是真实的生活。那是两张分开的桌子，对吗？有人吗？这看起来像中国的。这和我要找的完全不同。那和我要找的完全不同。