It's not too hard to see that all those possible normal vectors trace out the surface of a sphere.

不，所有这些可能 法线向量都在球体表面上。

Again, we are always measuring the angle between the normal and the light ray itself.

再次强调，我们始终测量法线和光线本身之间角度。

As well as a normal map that shows the direction each of the objects and pixels are facing.

以及一个法线，显示每个对象和像素朝向方向。

It’s just that the normal line, which is the imaginary line that the angles are relative to, changes.

只是法线，也就是角度所参照虚拟直线，发生了变化。

And so if we put in that normal again, our angle is actually increasing.

所以如果我们再次放入该法线，我们角度实际上会增加。

It's just that the normal line, which is the imaginary line that the angles are relative to, changes.

只是法线，即zoya所附着假想线，发生了变化。

Furthermore, when it comes to video game graphics, there are advanced topics such as shadows, reflections, UVs, normal maps, and more.

此外，在视频游戏形方面，还有高级主题如阴影、反射、UV、法线等。

Make sure your thumb points normal to the plane created by the velocity of the electric charge and the magnetic field.

确保你拇指指向由电荷速度和磁场形成平面法线方向。

But what happens if it comes in at an angle that is not along the normal, or not along the perpendicular?

但是如果它以不沿着法线或不沿着垂直线角度进入，会发生什么？

As it does that it will actually bend towards the normal or it is going to bend towards that dotted line or the perpendicular line.

当它这样做时，它实际上会向法线方向弯曲，或者向虚线或垂直线方向弯曲。

The direction they face is called the Surface Normal, and we can visualize that direction with a little 3D arrow that’s perpendicular to the polygon’s surface.

它们面对方向称为表面法线，我们可以用一个小垂直于多边形表面3D箭头来可视化这个方向。

And that angle of incidence, in other words the angle between the normal and the light ray is going to equal the angle of reflection.

入射角，换句话说，法线和光线之间角度等于反射角。

To figure it out, we use ray tracing with this simplified screen space 3D representation and bounce the rays off of the lake's pixels using the normal map.

为了弄清楚这一点，我们使用光线追踪技术，结合这个简化屏幕空间3D表示，并利用法线将光线从湖泊像素上反射去。

So in other words, what is going to happen if we shine a light right at a sphere and we are going to try to hit it right along the normal?

换句话说，如果我们将一束光照射到一个球体上，并尝试沿着法线照射它，会发生什么？

So  Bob looks at this and he wants an actual formula for that shadow, and the way he might think about  it is to consider the normal vector perpendicular off of that face.

所以鲍勃到这个， 他想要一个该阴影实际公式，他可能想到方式是考虑垂直于该面法线向量。