Ray 指令
来自GeoGebra Manual
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- Ray[ <Start Point>, <Point> ]
- Ray[ <Start Point>, <Direction Vector> ]
- Ray[Point A, Point B]
- Creates a ray starting at point A through point B.
- Ray[Point, Vector v]
- Creates a ray starting at the given point which has the direction vector v.
备注: See also Ray through Two Points tool.