利用视点变换自动求解多面体模型主视图方向研究

Main View Research to Solve Polyhedron Model Automatically with Perspective Transformation

利用视点的变换,分析原有的求解多面体主视图方向的方法,通过面的投影与面交线的投影重合这一事件,结合机械制图中主视图投影方向选择原则,得出一种新的求解多面体模型主视图投影方向的方法。和原有方法不同,该方法主要针对轴类、盘类零件等带有轴线的多面体模型。通过MATLAB中编程运行表明,该方法计算简单、准确率高、易于实现,自动选出的主视图投影并且符合人们的工程制图的习惯。

It analyzed the original method of solving the plan view direction of polyhedron by the use of perspective transformation,and then proposed a new way to solve the plan view projection direction of polyhedral models,through the event of coincidence of the projection and retain line projection,and combined with the selection principle of mechanical drawing of plan view projection direction.Different from the original way,this method aimed at the polyhedron models with axis such as axial and plate parts.MATLAB programming operation shows that this method is simple,accurate and easy to realize,and can elect plan view projection automatically conforming to people＇s habit of engineering drawing.