A flexible representation of controllers for physically-based animation of virtual humans

ABSTRACT

In this paper, we propose a representation of controllers that uses high-level sensors and possesses a general and intuitive structure that offers several types of parameters, which can be modified by the animator or automatically. This structure, with the feedback signals provided by its sensors, allows several state machines to act simultaneously on the model, or in a subset of its actuators. The sensors can be optimized, facilitating their definition and use. The representation also permits the animator to define procedures with more general instructions in order to be automatically executed by the controller during the dynamics simulation.

REFERENCES

• 1: Armstrong, W. W. & Green, M. (1985). The Dynamics of Articulated Rigid Bodies for Purposes of Animation. Proceedings of Graphics Interface' 85 (pp. 407--415). Montreal, Quebec, Canada.
• 2: Joel Auslander , Alex Fukunaga , Hadi Partovi , Jon Christensen , Lloyd Hsu , Peter Reiss , Andrew Shuman , Joe Marks , J. Thomas Ngo, Further experience with controller-based automatic motion synthesis for articulated figures, ACM Transactions on Graphics (TOG), v.14 n.4, p.311-336, Oct. 1995 [doi>10.1145/225294.225295]
• 3: Petros Faloutsos , Michiel van de Panne , Demetri Terzopoulos, Composable controllers for physics-based character animation, Proceedings of the 28th annual conference on Computer graphics and interactive techniques, p.251-260, August 2001 [doi>10.1145/383259.383287]
• 4: Jessica K. Hodgins , Nancy S. Pollard, Adapting simulated behaviors for new characters, Proceedings of the 24th annual conference on Computer graphics and interactive techniques, p.153-162, August 1997 [doi>10.1145/258734.258822]
• 5: Jessica K. Hodgins , Wayne L. Wooten , David C. Brogan , James F. O'Brien, Animating human athletics, Proceedings of the 22nd annual conference on Computer graphics and interactive techniques, p.71-78, September 1995 [doi>10.1145/218380.218414]
• 6: Laszlo, J. F. (1996). Controlling Bipedal Locomotion for Computer Animation. M.Sc. thesis, University of Toronto.
• 7: Joseph Laszlo , Michiel van de Panne , Eugene Fiume, Interactive control for physically-based animation, Proceedings of the 27th annual conference on Computer graphics and interactive techniques, p.201-208, July 2000 [doi>10.1145/344779.344876]
• 8: Oshita, M. & Makinouchi, A. (2001). A Dynamic Motion Control Technique for Human-like Articulated Figures. Computer Graphics Forum, 20(3), 192--202.
• 9: Marc H. Raibert , Jessica K. Hodgins, Animation of dynamic legged locomotion, ACM SIGGRAPH Computer Graphics, v.25 n.4, p.349-358, July 1991
• 10: Karl Sims, Evolving virtual creatures, Proceedings of the 21st annual conference on Computer graphics and interactive techniques, p.15-22, July 1994 [doi>10.1145/192161.192167]
• 11: Smith, R. Open dynamics engine. http://ode.org/. Retrieved October 23, 2006.
• 12: Van de Panne, M. (1996). Parameterized gait synthesis. IEEE Computer Graphics and Applications, 16(2), 40--49.
• 13: Michiel van de Panne , Eugene Fiume , Zvonko Vranesic, Reusable motion synthesis using state-space controllers, Proceedings of the 17th annual conference on Computer graphics and interactive techniques, p.225-234, September 1990, Dallas, TX, USA
• 14: Michiel van de Panne, Sensor-actuator networks, Proceedings of the 20th annual conference on Computer graphics and interactive techniques, p.335-342, September 1993 [doi>10.1145/166117.166159]
• 15: Van de Panne, M. & Lamouret, A. (1995). Guided optimization for balanced locomotion. Proceedings of the Eurographics Workshop on Computer Animation and Simulation'95 (165--177). Maastricht, The Netherlands.
• 16: J P Wilhelms , B A Barsky, Using dynamic analysis to animate articulated bodies such as humans and robots, Proceedings of Graphics Interface '85 on Computer-generated images: the state of the art, p.209-229, January 1986, Montreal, Quebec, Canada
• 17: Andrew Witkin , Michael Kass, Spacetime constraints, ACM SIGGRAPH Computer Graphics, v.22 n.4, p.159-168, Aug. 1988
• 18: Peng Zhao , Michiel van de Panne, User interfaces for interactive control of physics-based 3D characters, Proceedings of the 2005 symposium on Interactive 3D graphics and games, April 03-06, 2005, Washington, District of Columbia [doi>10.1145/1053427.1053441]

INDEX TERMS

Primary Classification:
  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.5 Computational Geometry and Object Modeling
          Subjects: Physically based modeling

Additional Classification:
  I. Computing Methodologies
  I.6 SIMULATION AND MODELING
      I.6.8 Types of Simulation
          Subjects: Animation

General Terms:
Algorithms, Design, Experimentation, Human Factors

Keywords:
motion control, physically-based animation