And the reason why fractionally accurate endpoints matter is that they affect what exact pixels get drawn, which in turn makes animation look much smoother. Eg.

And the reason why fractionally accurate endpoints matter is that they affect what exact pixels get drawn, which in turn makes animation look much smoother. Eg. a line that "crawls" from 0 to 6 as the endpoints move fractionally upward looks much less jittery than a line that's always 3. 0 # ####### ## ###### ### ##### 3 #### #### ##### ### ###### ## 6 ####### #