You should think of a function that takes in two coordinates and outputs a single coordinate.

您应该考虑这样一个函数 它接受两个坐标 输出一个坐标。

In 3D graphics, points have not just two coordinates, but three -- X, Y and Z. Or " zee" but I’m going to say " zed" .

在 3D 图形中，点不仅有两个坐标，还有三个坐标——X、Y 和 Z。或者“zee”，但我要说“zed”。

And the two rows indicate that the landing spot for each of those three basis factors is described with only two coordinates, so they must be landing in two dimensions.

这两行表示这三个基本因素中的每一个的着陆点都只有两个坐标 所以它们必须在二维空间中着陆。

What all of this is saying is that a two dimensional linear transformation is completely described by just four numbers, the two coordinates for where I hat lands and the two coordinates for where J hatland.

所有这些说的是一个二维线性变换完全由四个数描述 I和J的两个坐标。