Press ← or → to navigate between chapters
Press S or / to search in the book
Press ? to show this help
Press Esc to hide this help
坐标原点在进入活动页后下滑一屏后的左上角处, x 轴向右, y 轴向下.
x
y
屏幕宽度总是 2, 可以通过宽高比计算屏幕高度, 参见内置变量.
2