Al Middleditch .. A selection of peer reviewed publications

• "Orientation of simplices and flats"
  A. E. Middleditch
  Submitted for publication 2002,
  download paper
  
  
• "Least Stratifications and Cell-Structured Objects in Geometric Modelling"
  C. M. P. Reade and A. E. Middleditch,
  International Journal of Shape Modeling, Vol. 8, No. 1, pp. 59-77, June 2002.
  download paper
  
  
• "Point-Sets and Cell Structures Relevant to Computer Aided Design"
  A. E. Middleditch, C. M. P. Reade and A. J. Gomes,
  International Journal of Shape Modeling, Vol. 6, No. 2, pp. 175-205, 2000.
  view abstract or download paper
  
  
• "Improvements for the Djinn API to a geometric modelling kernel",
  A. E. Middleditch and C. M. P. Reade,
  International Journal of Shape Modeling, Vol. 6, No. 1, pp. 79-103, June 2000.
  download paper
  
  
• "Djinn: A geometric interface for solid modelling",
  C. Armstrong, A. Bowyer, S. Cameron, J. Corney, G. Jared, R. Martin, A. Middleditch, M. Sabin and J. Salmon,
  ISBN 1-874728-13-5, Information Geometers, 2000.
  
  
• "A Representation Independent Geometric Modeling Kernel",
  A. Middleditch, C. Reade and A. Gomes,
  Proceedings: Geometric Modeling and Processing 2000, April 10-12, Hong Kong,
  IEEE Computer Society Press, April 2000.
  download paper
  
  
• "Theories of Shape and Cell Structure for Computer Aided Design",
  A. E. Middleditch and C. M. P. Reade,
  Proceedings: The First Korea-UK Workshop on Geometric Modeling and Computer Graphics 2000,
  April 6-7, Seoul, Korea,
  pp. 181-187, Kyung Moon Publications, April 2000.
  download paper
  
  
• "Set-combinations of the mixed dimension cellular objects of the Djinn API",
  A. E Middleditch, C. M. P. Reade and A. J. Gomes,
  Computer Aided Design Vol. 31, No. 9, pp. 683-694, 1999.
  download paper
  
  
• "A mathematical model for boundary representation of n-dimensional geometric objects",
  A. J. Gomes, A. E. Middleditch and C. M. P. Reade,
  Proceedings: Fifth Symposium on Solid Modeling and Applications,
  (eds. Willemn Bronsvoort and David Anderson),
  pp 270-277, ACM Press, June 1999.
  
  
• "Issues and solutions in feature based modelling: re-designing the shape kernel of CAD systems",
  A. J. Gomes A. E. Middleditch and C. M. P. Reade.
  PROLOMAT'98, The Globalization of Manufacturing in the Digital Communications Era of the 21st Centuary:
  Innovation, Agility and Virtual Enterprise, the 10th International Conference IFIP TC5 WG-5.2 WG-5.3, Trento, Italy.
  Klluwer Academic Publishers, 1998.
  
  
• "Stable computation of the 2D medial axis transform"
  Guy Evans, Alan Middleditch and Nick Miles
  International Journal of Computational Geometry and Applications,
  Vol. 8, Nos. 5&6, pp. 577-598, 1998.
  
  
• "Bearing Lengths for Extrusion Dies; rational, current practice and requirements for automation"
  Nick Miles, Alan Middleditch and Guy Evans
  Journal of Materials Processing Technology,
  Vol 72:1, pp. 162-172, December 1997.
  
  
• "A kernel for geometric features"
  Alan Middleditch and Chris Reade.
  Proceedings: Fourth Symposium on Solid Modeling and Applications,
  (eds. Christoph Hoffman and Wim Bronsvort),
  pp. 131-140, May 1997.
  
  
• "Synthesis of a unified approach to shape modelling"
  Alan Middleditch and Abel Gomes,
  in Geometry Modeling: Theory and Practice,
  (eds.) W. Strasser, R Klein, R Rau,
  Springer Verlag, 1997.
  
  
• "Connectivity analysis: a tool for processing geometric constraints"
  Richard Latham and Alan Middleditch,
  Computer-Aided Design,
  Vol. 28, No. 11, pp. 917-928, November 1996.
  
  
• "A family of cubic algebraic surfaces interpolating three points with prescribed normals"
  Alan Middleditch and Evagelos Dimas,
  The Mathematics of Surfaces VI, Brunel University, U.K., September 1994,
  (ed.) G. Mullineux,
  Oxford University Press, 1996.
  
  
• "Solid models with piecewise algebraic free-form faces"
  Alan Middleditch and Evagelos Dimas,
  CSG 94 Set-theoretic Solid Modelling Techniques and Applications,
  pp 133-148, Information Geometers, 1994.
  
  
• "'The Bug' and beyond"
  Alan Middleditch,
  CSG 94 Set-theoretic Solid Modelling Techniques and Applications,
  pp. 1-16, Information Geometers, 1994.
  
  
• "Efficient hidden line elimination for set-theoretic volume models"
  Alan Middleditch and Livia Bruckner,
  International Conference on Manufacturing Automation,
  Hong Kong, August 1992.
  
  
• "Ray casting set-theoretic rolling sphere blends"
  Alan Middleditch,
  pp 261-280, Oxford University Press, 1994.
  
  
• "Intersection algorithms for lines and circles"
  Alan Middleditch, Terry Stacey and Shu B.Tor,
  ACM Transactions on Graphics, Vol. 8, No. 1, pp. 25-40,
  January 1989.
  
  
• "Applications of the vector sum operator"
  Alan Middleditch,
  Computer-Aided Design, Vol. 20, No. 4, pp. 183-187,
  May 1988.
  
  
• "Robust computation of tangent lines and circles"
  Alan Middleditch and Terry Stacey,
  Computer-Aided Design, Vol. 19, No. 9, pp. 503-507,
  November 1987.
  
  
• "The representation and manipulation of convex polygons"
  Alan Middleditch
  NATO Advanced Study Institute: Theoretical Foundations of Computer Graphics and CAD',
  (NATO ASI Series F, Volume 40), pp 211-252,
  R. A. Earnshaw (Ed.), Springer-Verlag 1988.
  
  
• "The geometry of machining for computer aided manufacture"
  Terry Stacey and Alan Middleditch,
  Robotica, Vol. 4, No. 2, pp. 83-91,
  April 1986.
  
  
• "Blend surfaces for set theoretic volume modelling systems"
  Alan Middleditch and Ken Sears,
  Computer Graphics, Vol. 19, No. 3, pp. 161-170, July 1985.