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目前我国应用计算机绘制的透视图基本上都只是由几根构造线组成,没有能把对驾驶员视觉影响较大的边坡及两侧景物反映出来。本文提出了透视图隐藏线的消去方法,并用FORTRAN语言编制了绘制公路全景透视图的程序,它所绘制的全景透视图已达到国外同等水平。透视图绘制范围为20～700米。绘制时先确定透视物点,再计算透视座标,最后完成全景透视图。对视线达不到的部分,可通过设置屏蔽数组来消去这种隐藏线。计算机图形中
At present, the perspective of computer drawing in our country is basically composed of only a few construction lines, which can not be reflected in the side slopes and the flanks of scenes that greatly affect the driver’s vision. In this paper, we put forward the method of eliminating the hidden line of perspective view, and use FORTRAN language to draw the program of drawing the panoramic view of the highway. The panoramic perspective view drawn by it has reached the same level abroad. Perspective drawing range of 20 to 700 meters. Drawing first determine the point of perspective objects, and then calculate the perspective coordinates, and finally complete the panoramic perspective. For lines of sight that can not be reached, this hidden line can be eliminated by setting a mask array. In computer graphics