【Real Time Rendering 1】

1、RTR是一本導論。官網：http://www.realtimerendering.com。

2、At around 6 fps, a sense of interactivity starts to grow.

An application displaying at 15 fps is certainly real-time; the user focuses on action andreaction.

There is a useful limit, however. From about 72 fps and up, differences in the display rate are effectively undetectable.

3、The plane π is said to divide the space into 2 spaces:

　　1) a positive half-space, where n · x + d > 0,

　　2) anegative half-space, where n · x + d < 0.

　　All other points are said to lie in the plane.

4、(x,y) 垂直於 (-y, x)

Real Time Rendering 1