2d-density 中文文档教程
2d density
一种算法,可用于查找可装入具有预定义间距的网格的最大单元格数。 换句话说,二维密度。
Build Status
Install
npm install 2d-density
Usage
const twoDDensity = require('2d-density');
const gridWidth = 100;
const gridHeight = 100;
const spacing = 3;
const result = twoDDensity.findPercentFull(gridWidth, gridHeight, spacing);
宽度、高度和间距都应该是整数。
间距不计算对角线。 因此,对角相邻的单元格实际上间隔 2 个单元格。
Sample output
{
count: 2000,
percent: 0.2
}
Visual example
假设您有一个宽度为 5 且高度为 4 的网格,并且您想要填充彼此相距 2 的单元格。 您最终可能会得到这样
x | x | x | ||
---|---|---|---|---|
x | x | |||
x | x | x | ||
x | x |
的结果:计数为 10,已满百分比为 0.5。 对于 2 的间距,这将非常容易计算,但是当使用奇数间距时,事情会变得更加复杂。
例如,间距为 3
x | x | |||
---|---|---|---|---|
x | ||||
x | x | |||
的 5 x 5 网格。计数仅为 5,百分比为 0.2。
2d density
An algorithm than can be used to find the maximum number of cells that can fit into a grid with a predefined spacing. In other words two-dimensional density.
Build Status
Install
npm install 2d-density
Usage
const twoDDensity = require('2d-density');
const gridWidth = 100;
const gridHeight = 100;
const spacing = 3;
const result = twoDDensity.findPercentFull(gridWidth, gridHeight, spacing);
Width, height and spacing should all be whole numbers.
Spacing does not count diagonals. Thus a cell that is diagonally adjacent is really spaced 2 cells away.
Sample output
{
count: 2000,
percent: 0.2
}
Visual example
Say you have a grid with a width of 5 and a height of 4 and you want to fill cells that are 2 away from each other. You might end up with something like this:
x | x | x | ||
---|---|---|---|---|
x | x | |||
x | x | x | ||
x | x |
The count would be 10 and percentage full would be 0.5. This would be pretty easy to calculate for spacing of 2 but things get more complex when using spacings with odd numbers.
For example a 5 by 5 grid with spacing of 3.
x | x | |||
---|---|---|---|---|
x | ||||
x | x | |||
The count is only 5 and the percentage would be 0.2.