If you were writing a pool game you could use a PickRaySegment to represent the pool cue and you could pick with BoundingSphere to detecting collisions between the balls.

如果你正在编写一个撞球游戏，你可以使用PickRaySegment表示撞球杆并使用BoundingSphere拣选以检查球与球之间的碰撞。

youdao

Gus stood at the table, toying with a cue stick, his eyes straying lazily over the billiard balls scattered about the table in the array of an unfinished game.

格斯站在桌旁，手里拿着一根弹球棒弄着玩，两眼懒洋洋地瞟着因一局未完而散在桌上各处的弹球。

youdao

For the title's single-player campaign, the game makers at Swedish developer DICE took a cue from the popular multiplayer mode of 2011's "Battlefield 3, " focusing more on open environments, allowing players tactical freedom and giving them more ways to command squad mates.

NPR: EA Teases Dramatic 'Battlefield 4'

Each participant was told that he or she would compete against an unseen opponent in a 25-trial computer game in which the object was to be the first to respond to a visual cue on the computer screen.

FORBES: Study: More Violent Video Game Play Results in More Aggression