方向线的角度决定起始和结束线通过的角。
The angle of the orientation line determines which corners the starting and ending lines pass through.
起始线与方向线垂直，并经过矩形的一个角。
The starting line is perpendicular to the orientation line and passes through one of the corners of the rectangle.
起始线与方向线垂直，并经过矩形的一个角。
The starting line is perpendicular to the orientation line and passes through one of the corners of the rectangle.
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