问题描述
Nezzar is addicted to game Gold Miner recently.
Gold Miner is a game in which the player is in an nn grid, and the goal is to collect gold without entering forbidden area. It is known that cell (i,j) is forbidden to enter if and only if ij or ij…
Chapter 4: Implementing Quaternions
其实很多人物的动画里,只有rotation,没有平移或者scale上的变化。 Most humanoid animations are created using only rotations—no translation or scale is needed. Think about an elbow joint, for example. …