Hans Grabowski, Reiner Anderl, Michael J. Pratt's Advanced Modelling for CAD/CAM Systems PDF

By Hans Grabowski, Reiner Anderl, Michael J. Pratt

Reiner Anderl The complex Modelling a part of the CAD*I venture aimed toward the improvement of a brand new new release of modelling strategies as a uncomplicated performance of destiny CAD/CAM platforms. The technique and ideas for complicated modelling innovations, their availability within the conversation interface of a CAD/CAM method and their impact on inner interfaces within the software program structure of a CAD/CAM procedure are primary result of complex modelling paintings. those effects shape the foundation for the improvement of a brand new iteration of CAD/CAM platforms that are referred to as product modelling structures. CAD/CAM structures this day in most cases help the geometric description of a technical half or its description as a technical drawing. complex geometric modelling functions care for parametric layout features embedded into CAD/CAM structures. although, improvement suggestions for destiny CAD/CAM structures are directed towards the subsequent: 1. the advance of product modelling platforms and a pair of. the advance of built-in platforms in keeping with CAD, CAP (Computer Aided Planning), CAM and different CIM (Computer built-in Manu­ facturing) functionalities.

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1. @ (Ie typ (CIRCLE). je typ (CIRCLE). 1abs(M(il. MO)) I < ~. -> ins_coo: (I. j) I . I a 1< ~ ( ... 1. sym (1. --- J. It) 45 U :. ( i e typ (ARC). j e typ (ARC). It e typ (SYM_LINIE). Iaba(l. It) - aba(J. It) 1 < -> ins_sytn (I.. j. ) I . ( ... 1. c;, n _e _ _ _ Legend : 1 - E:d8ting Entity J - New Entity It - Tangent or symmetry line p. 3 Rule Base of the Semantic Context Analysis System Architecture of the System for the "Handsketch" Input System The HIS consists of two independent modules. The first module is the Pattern Recognition System (PRS) responsible for the syntactic recognition of geometric entities and the other the Context Analysis System (CAS).

2-2 shows an extract of the rule base. Every rule consists of a condition and an action part. The condition part describes the requirements which have to be fulfilled so that the rule can be applied. The action part defines a set of actions (operations) which will be performed to change the model. Because of the modular structure of the rule base, it is possible to integrate any CAD modelling interface. Any object can be described by a set of geometric entities (themselves described in terms of their type and POD parameters) and by a set of relationships between these entities.

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