(a) The buffer movement of JS Motion

Basic idea: Use the timer to move the object to the right, in the course of the movement is not uniform motion, but first fast after slow, that is, the greater the distance, the faster, the smaller the distance, the smaller the speed, but to reach the end of time, you must pay attention to use up the whole function Math.ceil () And down the whole function math.floor (), so that you can get to the end correctly, not the discrepancy.

<! DOCTYPE html><!---->
：
Initial state, starting from left and starting from the right:



No rounding causes discrepancies, title indicates the end position and speed size:
Rounding no error condition:




(a) The buffer movement of JS Motion