【摘要】 本文讨论了外透视投影中各种位置直线的量点和线段的实长问题，找到了图解线段实长的一种方法。更多还原

【Abstract】 The measuring point problem of a straight line in oblique perspective projection is discussed. The real lengths of line segments in that projection are defined graphically by themethod that makes a horozontal plane passing through the end point of line segment and usesits tracing line or makes a horizontal line passing through the end point and uses its vanishingpoint. A method for defining the real length of various line segments is proposed.更多还原