Now showing items 1-10 of 10

    • Animating Human Athletics 

      Hodgins, Jessica K.; Wooten, Wayne L.; Brogan, David C.; O'Brien, James F. (Georgia Institute of Technology, 1995)
      This paper describes algorithms for the animation of men and women performing three dynamic athletic behaviors: running, bicycling, and vaulting. We animate these behaviors using control algorithms that cause a physically ...
    • Animating Sand, Mud, and Snow 

      Sumner, Robert W.; O'Brien, James F.; Hodgins, Jessica K. (Georgia Institute of Technology, 1998)
      Computer animations often lack the subtle environmental changes that should occur due to the actions of the characters. Squealing car tires usually leave no skid marks, airplanes rarely leave jet trails in the sky, and ...
    • Automated Segmentation of Coronary Vessels in Angiographic Image Sequences Utilizing Temporal, Spatial and Structural Constraints 

      O'Brien, James F.; Ezquerra, Norberto F. (Georgia Institute of Technology, 1994)
      The methods presented here have been developed to perform the automated segmentation of coronary arterial structure from cine sequences of biplanar x-ray angiograms. We introduce a methodology to impose an integrated set ...
    • Automatic Joint Parameter Estimation from Magnetic Motion Capture Data 

      O'Brien, James F.; Bodenheimer, Robert E., Jr. (Bobby); Brostow, Gabriel Julian; Hodgins, Jessica K. (Georgia Institute of Technology, 1999)
      This paper describes a technique for using magnetic motion capture data to determine the joint parameters of an articulated hierarchy. This technique makes it possible to determine the limb lengths, joint locations, and ...
    • Combining Active and Passive Simulations for Secondary Motion 

      O'Brien, James F.; Zordan, Victor B.; Hodgins, Jessica K. (Georgia Institute of Technology, 1997)
      Varied, realistic motion in a complex environment can bring an animated scene to life. While much of the required motion comes from the characters, an important contribution also comes from the passive motion of other ...
    • Dynamic Simulation of Splashing Fluids 

      O'Brien, James F.; Hodgins, Jessica K. (Georgia Institute of Technology, 1994)
      In this paper we describe a method for modeling the dynamic behavior of splashing fluids. The model simulates the behavior of a fluid when objects impact or float on its surface. The forces generated by the objects create ...
    • Graphical Modeling and Animation of Brittle Fracture 

      O'Brien, James F.; Hodgins, Jessica K. (Georgia Institute of Technology, 1999)
      In this paper, we augment existing techniques for simulating flexible objects to include models for crack initiation and propagation in three-dimensional volumes. By analyzing the stress tensors computed over a finite ...
    • Graphical modeling and animation of fracture 

      O'Brien, James F. (Georgia Institute of Technology, 2000-08)
    • Graphical Modeling and Animation of Fracture 

      O'Brien, James F. (Georgia Institute of Technology, 2000)
      This thesis addresses the problem of graphically modeling and animating the realistic behavior of materials that can undergo fracture due to deformation-induced stress. Using an approach based on linear elastic fracture ...
    • Variational Implicit Surfaces 

      Turk, Greg; O'Brien, James F. (Georgia Institute of Technology, 1999)
      We introduce a new method of creating smooth implicit surfaces of arbitrary manifold topology. These surfaces are described by specifying locations in 3D through which the surface should pass, and also identifying locations ...