Getting the smallest sphere which is tangent to four non-parallel unlimited skew lines in general positions based on MATLAB

Abstract

The mainly content of this thesis is to solve the problem of “getting the smallest Sphere which is tangent to non-parallel unlimited skew lines in general positions”, by using AutoCAD and MATLAB software. The AutoCAD secondary development interface VBA (Visual Basic For Application) and other interfaces which provided by MATLAB are used to realize the visualized solution of the problem. Firstly, using VBA in AutoCAD to create a user interface which will be given the initial conditions recorded in the program. Secondly, the calculation is carried out in MATLAB and the results are retuned to VBA. Finally, the graphics is generated from VBA program and displayed in the window of AutoCAD.