问题描述
我很难理解这个概念,因为在几乎所有的例子中都使用了一些高级几何。
I have a hard time understanding this concept,that's because in almost all examples,some advanced geometry is used.
我在dx 10书的介绍中找到了这个术语并且它没有什么先进的东西,比如某些网站给出的例子。
I found this term in my introduction to dx 10 book,and there is nothing so advanced in it,like the examples given by some websites.
所以有人可以告诉我什么是齐次坐标让我知道高级几何?我想知道这个术语,因为我需要在3D图形编程中使用它。
So can someone tell me what are homogeneous coordinates without having me to know advanced geometry? I want to know this term because I'll need it in 3D graphics programming.
推荐答案
均匀坐标可用于将二维点传递到维或四维等等。如果一个点的齐次坐标乘以一个非零标量,那么得到的坐标代表相同的点,如:(8,4,2)和
(4,2,1)都代表( 4,2)。
Homogeneous coordinates can be used for transfer a 2-D point to dimensional or 4-D and so forth. And if the homogeneous coordinates of a point are multiplied by a non-zero scalar then the resulting coordinates represent the same point, like: (8,4,2) and (4,2,1) all stand for (4,2).
使用它我们也可以定义无限远点,更多信息,你可以看到Pavel A提供的维基百科。
Using it we can also define a point at infinity, for more information, you can see the Wikipedia provided by Pavel A.
我希望我的评论会有所帮助。
I hope my comment will help.
问候,
Elegentin
Elegentin
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