PHYSIK Physically Plausible and Intuitive Keyframing
Amir H. Rabbani, Paul G. Kry Graphics Interface, 2016
Abstract We present an approach for animating characters using inverse kinematics (IK) handles that allows for intuitive keyframing of physically plausible motion. Specifically, we extend traditional IK and keyframing to include center-of-mass and inertia handles along with physically based templates to help an animator produce trajectories that respect physics during dynamic activities, such as swinging, stepping, and jumping. Animators can easily control both posture and physics-based quantities (inertia shape, center of mass position, and linear momentum) when building motions from scratch, but also have complete freedom to create exaggerated or impossible motions. We present results for a variety of planar characters of different morphologies.
Keywords inverse kinematics, character animation, computer graphics and realism, physics