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对工程二次曲面的相交情况进行了分析，提出了相贯线的三维仿真显示方法，在微机上实现了相贯线的真三维动画及其三面投影的同步动画，在屏幕上可清晰、真实显示工程二次曲面相贯线各种位置的形状及其连续变化过程，为研究相贯线的性质及分析相贯线的投影趋势提供了科学手段．
The intersection of the secondary surfaces of the project is analyzed, and the 3D simulation display method of the intersecting lines is proposed. The real three-dimensional animation of the intersecting lines and the synchronous animation of the three-plane projection are realized on the microcomputer, and the screen can be clearly and authentically It shows the shape and continuous changing process of the intersecting lines of the quadratic surfaces of the project and provides a scientific method for studying the properties of the intersecting lines and analyzing the projecting trend of the intersecting lines.