Publications Since 2000 Chronologically

Note that the formatting of the papers may differ from that in the various books and journals in which they appeared.
Many older papers are also online, ordered by topic.


2019:

“An approximation of geodesic circle passing through three points on an ellipsoid,” Young Joon Ahn and Christoph Hoffmann. Journal of Applied Geodesy (2019): accepted.

2018:

"Sequence of Gn LN polynomial curves approximating circular arcs." Young Joon Ahn and Christoph Hoffmann. Journal of Computational and Applied Mathematics 341 (2018): 117-126.

2017:

"Tree Deomposable and Underconstrained Geometric Constraint Problems." I. Fudos, C. Hoffmann, R. Joan-Arinyo. Chapter 23 in Handbook of Geometric Constraints Principles, edited by Meera Sitharam, Audrey St.John and Jessica Sidman. Mathematics series, CRC press. In press.

"Sequence of Gn LN polynomial curves approximating circular arcs." Y.-J. Ahn, C. Hoffmann, under review.

2016:

"Slice coherence in a query-based architecture for 3D heterogeneous printing," U. Yaman, N. Butt, E. Sacks, C. Hoffmann, Computer Aided Design 75–76, June 2016, 27–38.

"Tree Deomposable and Underconstrained Geometric Constraint Problems." I. Fudos, C. Hoffmann, R. Joan-Arinyo. Chapter in Handbook of Geometric Constraints Principles, edited by Meera Sitharam, Audrey St.John and Jessica Sidman. Mathematics series, CRC press. Accepted subject to minor revisions.

"Solid Modeling." C. Hoffmann and V. Shapiro. Chapter 59 in Handbook of Discrete and Computational Geometry, 3rd edition.

2014:

“Geometric Interoperability via Queries,” C. Hoffmann, V. Shapiro, V. Srinivasan, Computer Aided Design 46 (2014); 148-159.

"Circle approximation using LN Bézier curves of even degree and its application." Young Joon Ahn and Christoph Hoffmann. Journal of Mathematical Analysis and Applications 410.1 (2014): 257-266.

"Geometric constraints on quadratic Bézier curves using minimal length and energy." Young Joon Ahn, Christoph Hoffmann, and Paul Rosen. Journal of Computational and Applied Mathematics 255 (2014): 887-897.

2012:

A Generalized Malfatti Problem. S.-C. Chiang, C. Hoffmann and P. Rosen. Comp. Geometry Thy. & Appl. 45, Oct. 2012, 425-435.

"A note on circle packing." Young Joon Ahn, Christoph M. Hoffmann, and Paul Rosen. Journal of Zhejiang University SCIENCE C 13.8 (2012): 559-564.

2011:

Curvature Continuous Offset Approximation based on Circle Approximation using Biquadratic Bezier Curves. Y. J. Ahn, C. M. Hoffmann and Y. S. Kim. CAD 43:8 (2011) 1011-1017.

Geometric Constraint Solving in CAD. B. Bettig and C. M. Hoffmann. JCISE 021001 (9 pages), 2011.

Approximate Convolution with Pairs of Cubic Bezier LN Curves. Y. J. Ahn and C. M. Hoffmann. CAGD 28:6(2011) 357 - 367.

Constraint-Based LN Curves. Y. J. Ahn and C. Hoffmann. CAGD; forthcoming(Expanded version of presentation at SAC, Sierre, Switzerland, March 2010.)

Pose Space Parameterization and Style Transfer of Skin Deformation. Jong-Hyuk Kim, Jung-Ju Choi and C. M. Hoffmann. Journal of Computer Animation and Virtual Worlds; forthcoming.

Circle Approximations on Spheroids. Y. J. Ahn, J. Cui and C. M. Hoffmann. Journal of Navigation 64 (2011) 1-11.

2010:

An Experimental in Rule-based Crowd Behavior for Intelligent Games. Seongdong Kim, Christoph Hoffmann, Jae Moon Lee. Advances in Information Sciences and Service Sciences 2:3, September 2010.

A Curved Ray Camera for Handling Occlusions through Continuous Multiperspective Visualization. Jian Cui, Paul Rosen, Voicu Popescu, and Christoph Hoffmann. IEEE Transactions on Visualization and Computer Graphics, 2010.

Analyzing the Parameters of Prey-Predator Models for Simulation Games. S. Kim, C. M. Hoffmann and V. Ramachandran. ICEC 2010, Seoul, Korea, Sept. 2010.

Length and Energy of Quadratic Bezier Curves and Applications. Y. J. Ahn, C. M. Hoffmann and P. Rosen. Preprint.

PCS: Prominent Cross-Sections for Mesh Models. S. Sellamani, R. Muthuganapathy, Y. Kalyanaraman, S. Murugappan, M. Goyal, K. Ramani and C. Hoffmann. CAD&A 7, 2010.

The General Pinhole Camera: Effective and Efficient Non-Uniform Sampling for Visualization. V. Popescu, P. Rosen, L. Arns, X. Tricoche, C. Wyman, C. Hoffmann. IEEE Transactions on Visualization and Computer Graphics, 2010.

Constraint-Based LN Curves. Y. J. Ahn and C. Hoffmann. Proc. ACM SAC'10, p.1242-1246, Sierre, Switzerland, March 2010.

Hardware Assist for Constrained Circle Constructions I: Sequential Problems. S.-C. Chiang, C. Hoffmann, and P. Rosen; CAD&A 7(1), 17-33, 2010.

Hardware Assist for Constrained Circle Constructions II: Cluster Merging Problems. S.-C. Chiang, C. Hoffmann, and P. Rosen; CAD&A 7(1), 33-44, 2010.

2009:

Simulation and Validation of Structural Models. C. Hoffmann, A. Sameh, A. Grama. DDDAS'09.  Baton Rouge, Louisiana, May 2009.

"An Experiment in Rule-based Crowd Behavior for Intelligent Games. Seongdong Kim, Christoph Hoffmann, Jae Moon Lee. Proc. ICCIT09 Seoul, Korea, November 2009.

Emergent Crowd Behavior. S.-C. Chiang, C. Hoffmann, S. Mittal. CAD'09, Reno, NV, June 2009.

Teaching Computational Thinking to Science Majors. S. Hambrusch, C. Hoffmann, T. Korb and M. Haugan. SIGCSE 2009,  Mar. 2009, Chattanooga, TN.

2008:

A High-Quality Physically-Accurate Visualization of the September 11 Attack on the World Trade Center, P. Rosen, V. Popescu, C. Hoffmann, A. Irfanoglu, IEEE Transactions on Visualization and Computer Graphics 14:4, 2008, 937-947.

An Engineering Perspective of the Collapse of WTC-1, A. Irfanoglu and C. Hoffmann.  ASCE J. Perf. of Constructed Facilities 22,62, 2008.

Game Development in a Larger Context. C. Hoffmann and B. Davenport-Sypher. 3rd Academic Gaming Days for CS Education.  Feb. 2008, aboard the Celebrity Century Cruise Ship.

General-Purpose Visualization of Large-Scale Finite Element Analysis Simulations. V. Popescu and C. Hoffmann.  Proc. I/ITSEC Conf. Orlando, Nov. 2008

2007:

On Validating STEP Product Data Exchange, A. Kuzminykh and C. Hoffmann.  Computer-Aided Design, 2007.

Perception of Surfaces from Line Drawings, C. Hoffmann, Z. Pizlo, V. Popescu, S. Price,  Elsevier Journal Displays, Volume 28, Issue 1, February 2007.

CAD Visualization by Outsourcing, V. Popescu and C. Hoffmann.  CAD'07, Hawaii, June 2007.

2006:

Summary of Basic 2D Constraint Solving, C. Hoffmann, Intl. J. Prod. Lifecycle Mgmt 1:2, 2006, 143-149.

Study of the Perception of 3D Spatial Relations for a Volumetric Display, C. Hoffmann, Z. Pizlo, V. Popescu, P. Rosen,  SPIE Journal of Electronic Imaging 15, 2006.

2005:

Constraint-Based CAD, C. Hoffmann, JCISE 5:3, 2005, 182-187.

Accuracy and Semantics in Shape-Interrogation Applications, C. Hoffmann and N. Stewart, Graphical Models 67:5, 2005, 373-389.

High-Fidelity Simulation of Large Scale Structures, C. Hoffmann, A. Sameh and A. Grama, Proc. Comp. Sci - ICCS 2005, Springer LNCS 3515, 2005, 664-671.

Fidelity in Large-Scale Simulations, V. Popescu and C. Hoffmann, CAD 37, 2005, 99-107.

Redundant reader elimination in RFID systems, B. Carbunar, M. Ramanathan, M. Koyuturk, C. Hoffmann, A. Grama. IEEE SECON, Santa Clara, Sept. 2005.

2004:

Solid Modeling, C. Hoffmann, Handbook of Discrete and Computational Geometry, Chapter 56, 2nd Edition, J. Goodman and J. O'Rourke, eds., CRC Press, 2004, 863-880.

Dynamic Proximity Calculations for Situation Awareness, Y. Kim and C. Hoffmann, Naval Research and Logistics 51, 2004, 166-192.

Perception of 3D Spatial Relations in 3D Images, P. Rosen, Z. Pizlo, C. Hoffmann and V. Popescu, Proc. 16th SPIE Symp. on Electron. Imag., Seattle, 2004.

Compliant Motion Constraints, C. Hoffmann and W. Yang, Proc. Asian Symp. on Comp. Math., Beijing, 2004

Modeling, Simulation and Visualization: The Pentagon on September 11th, C. Hoffmann, V. Popescu, S. Kilic and M. Sozen, IEEE Comp. in Sci. and Engr., Jan/Feb 2004, 52-60.

2003:

CADDAC: Multi-Client Collaborative Shape Design System with Server-Based Geometry Kernel, A. Agrawal, K. Ramani, M. Babu, and C. Hoffmann, J. Computing and Information Sci. in Engr., Vol. 3, Issue 2, 109-175, 2003.

CADDAC: Multi-Client Collaborative Shape Design System with Server-Based Geometry Kernel, A. Agrawal, K. Ramani, C. Hoffmann, Proc. ASME DETC, 22nd, Computers and Information in Engineering Conference, Sept. 2003, Montreal, Canada, 459-466.

Enhanced Battlefield Visualization for Situation Awarenesss, Y. Kim and C. Hoffmann, Computers and Graphics 27, 2003, 873-885.

Producing High-Quality Visualizations of Large-Scale Simulations, V. Popescu, C. Hoffmann, S. Kilic, M. Sozen and S. Meador, Proc. IEEE Visualization, 2003, 575-580.

Automatic Quantification and Reconstruction of Collagen Matrix from 3D Confocal Datasets, J. Wu, B. Rajwa, D. Filmer, C. Hoffmann, B. Yuan, C.-S. Chiang, J. Sturgis, P. Robinson, J. Microscopy 210, Pt.2, 2003, 158-165.

2002:

Parametric Modeling, C. Hoffmann and R. Joan-Arinyo, Handbook of CAGD, G. Farin, J. Hoschek and M.-S. Kim, eds., Elsevier, 2002, 519-541.

Variable-Radius Circles in Cluster Merging I: Translational Clusters, C. Hoffmann and C.-S. Chiang, CAD 34, 2002, 787-798.

Variable-Radius Circles in Cluster Merging II: Rotational Clusters, C. Hoffmann and C.-S. Chiang, CAD 34, 2002, 799-806.

Solving Spatial Basic Geometric Constraint Configurations with Locus Intersection, X.-S. Gao, C. Hoffmann and W. Yang, Proc. Solid Modeling '02, 2002, 95-104.

Modeling ECM Fibre Formation: Structure Information Extracted by Analysis of 2D and 3D Image Sets, J. Wu, S. Voytik-Harbin, D. Filmer, C. Hoffmann, B. Yuan, C.-S. Chiang, J. Sturgis, P. Robinson, Proc. Soc. Photo-Opt. Instr. Engineers (SPIE), Vol 4621, 2002, 52-56.

ToolCAD: Multi-Client Collaborative Shape Design System With Server Based Geometry Kernel, A. Agrawal, K. Ramani, C. Hoffmann, ASME Design Engineering Technical Conference, Montreal, 2002.

2001:

Decomposition Plans for Geometric Constraint Problems, Part 1, C. Hoffmann, A. Lomonosov and M. Sitharam, JSC 31, 2001, 367-408.

Decomposition Plans for Geometric Constraint Problems, Part 2, C. Hoffmann, A. Lomonosov and M. Sitharam, JSC 31, 2001, 409-427..

Robustness in Geometric Computations, C. Hoffmann, JCISE 1, 2001, 143-155.

Towards Valid Parametric CAD Models, C. Hoffmann and K.-J. Kim, CAD 33, 2001, 81-90.

On Spatial Constraint Solving Approaches, C. Hoffmann and B. Yuan, in Automated Deductions in Geometry, J. Richter-Gebert and P. Wang, eds., Springer LNAI, 2001, 1-15.

2000:

A Systematic Framework for Solving Geometric Constraints, C. Durand and C. Hoffmann, JSC 30, 2000, 493-520.

Distributed Maintenance of Multiple Product Views, C. Hoffmann and R. Joan-Arinyo, CAD 32, 2000, 421-432.