| An algorithm is presented for the conversion of 2D data to 3D CAD format. This algorithm is a combination of a constraint propagation technique and a volume intersection technique. It is similar to the one developed by Zen Chen (9) but the complexity of that algorithm is significantly reduced by the use of the proposed volume intersection technique.;The three major phases in the conversion process are: decomposition, reconstruction of subpart, subpart composition. The decomposition phase recognizes certain features in the 2D drawing. The reconstruction phase recognizes each feature as a particular class of object and determines the dimensions from other 2D drawings. The root or the base object is also constructed by extruding the outline of all the three views and, by performing a volume intersection operation on it. The final phase consists of interactive assembling of the parts by the user. Since the various parts are created within an AUTOCAD... |
