基于排样思想的工程图坐标尺寸防干涉方法

novel automatic datum dimensioning (or ordinate dimentioning) approach is proposed to address the overlap and intersect issues in the Die & Mould engineering drawing, based on the cutting & packing strategy. The corresponding optimization model is presented with respect of the minimized offset value of the datum dimension as objective, and overlap as the constraints. The proposed algorithm has been implemented by utilizing the programming language, AutoLISP provided by AutoCAD. The practical datum dimensioning cases are given to illustrate the important features of the method. The results indicate that the overlap and intersection issues can be well figured out with the proposed approach.