| Manual computing coordinates of space curve is inefficient as using cutting machine in the shipbuilding industry. This paper introduces the CAD graphic programming system developed in ObjectARX and VC++. The system can compute coordinates of space curve automatically as cutting holes on shell and cutting the ends of the steel tubes.In this paper, finish that software design of CAD graphic programming system, introduces detailed the method for 3D solid model based on AutoCAD development environment ObjectARX, realize to generate automatically the 2D drawing or 3D solid model through the design method of parametric drawing and based on the features of ObjectARX development tool, and put forward the intersectant method and the projective method. Compared the space curve data from the two methods and formula's calculation by hand, the result indicates the system which held is higher precision and effective satisfied with practical application. |
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