Try drawing a square grid like this, and simulating Hedge’s path over it.
试着画一个这样的正方形网格,并模拟 Hedge 在其上的路径。
Linear algebra
Then any shape that's not a grid square can be approximated by grid squares pretty well with arbitrarily go to approximations if you use small enough grid squares.
然后 如果你使用足够小的网格方块 任何不是网格方块的形状都可以很好地用网格方块近似。
Linear algebra
When I animate 2D space, I typically use this square grid, but that grid is just a construct, a way to visualize our coordinate system, and so it depends on our choice of basis.
So since the areas of all those tiny grid squares are being scaled by some single amount, the area of the blob as a whole will also be scaled by that same single amount.
因此 由于所有这些小方格的面积都被按一定的比例缩放 整个斑点的面积也将按相同的比例缩放。
英语百科
Maidenhead Locator System
(重定向自Grid square)
The Maidenhead Locator System is a geographic co-ordinate system used by amateur radio operators. Dr. John Morris, G4ANB, originally devised the system, and a group of VHF managers, meeting in Maidenhead, England in 1980, adopted it. The Maidenhead Locator System replaces the older QRA locator system with one that is usable outside Europe.