Boundary Representation Modelling Techniques
Boundary representation is the principle solid modelling method used in modern CAD/CAM systems. There have been a long series of developments on which currently available systems are based, full details of which are only partially known. Ian Stroud’s thorough coverage of these developments puts this technology in perspective. It includes: • data structures • algorithms and other related techniques including non-manifold modelling • product modelling • graphics • disc files and data exchange • some applications related topics. A basic knowledge of the technique will make it easier to use kernel modelling packages for application developments. Ian Stroud started working with boundary representation solid modelling in 1977. Since then he has researched and is researching a wide variety of topics in and around this field. The information in the book comes from the results of this research.
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- See for example Ian Stroud ”Boundary Representation Modelling Techniques” for a light introduction. The OpenCascade project is a fairly complete example of a complete one. But there is no ”by the book” way to do it - it requires both design and engineering savvy.
The simple explanation is the capability to model 3D shapes in a way that you can output the data to the rest of the manufacturing process. Hence what manifacturing process you target at least partially dictates your constraints.
The output could be - engineering drawings, CNC machines, 3D printers. Or another 3D modeling application down the pipeline.
In a way ”CAD kernel” alone is a worthless as a spec since it’s too general, just like ”a vehicle” is a useless spec for engineering.
CAD kernel- for modeling what, by whom, and where.
Naturally questions of numerical robustness and exactness of presentation soon enter the picture. How large or precise features do you need to model, for example.
- I've been reading Boundary Representation Modelling Techniques by Ian Stroud. Not the most approachable book, and I haven't read nearly all of it, but I already found it very valuable.
- Boundary Representation Modelling Techniques by Stroud is probably the most popular one. It's expensive but Anna has it in her archive.
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