Computer Animation and Virtual Worlds

Cover image for Vol. 28 Issue 1

Edited By: Nadia Magnenat Thalmann and Daniel Thalmann

Impact Factor: 0.548

ISI Journal Citation Reports © Ranking: 2015: 88/106 (Computer Science Software Engineering)

Online ISSN: 1546-427X

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  • Animating synthetic dyadic conversations with variations based on context and agent attributes

    Animating synthetic dyadic conversations with variations based on context and agent attributes

    The marketplace scenario.

  • An embodied approach to arthropod animation

    An embodied approach to arthropod animation

    Select frames of a tarantula climbing onto a vertical wall. Green dots show the intersection bounds of the rudimentary sensing mechanism, used to judge the proximity and relative angle of objects in the creature's path.

  • A system for automatic animation of piano performances

    A system for automatic animation of piano performances

    Key poses of finger crossover while playing scales. The first row shows a key frame of the thumb crossing over the middle finger while playing the C-major scale, and the second row shows a key frame of the thumb crossing over the ring finger while playing the D-major scale, both from three perspectives. Note that the ring/middle finger firmly presses down the keys, the fingers avoid collisions with black keys in C-major, the wrist maintains a natural rotation, and the thumb is positioned well on the key to play it after crossing over.

  • Painterly rendering techniques: a state-of-the-art review of current approaches

    Painterly rendering techniques: a state-of-the-art review of current approaches

    A sample input source images (A and A ′ ) along with the target input images (B) with the result output (B ′ ) produced using techniques presented in .

  • Haptic collision handling for simulation of transnasal surgery

    Haptic collision handling for simulation of transnasal surgery

    The endoscope (green) inside the nasal cavity during simulation of transnasal surgery. In the larger image, some interior structures were made visible. The anatomy is complex and challenging for computation of tissue–tool interaction.

  • Animating synthetic dyadic conversations with variations based on context and agent attributes
  • An embodied approach to arthropod animation
  • A system for automatic animation of piano performances
  • Painterly rendering techniques: a state-of-the-art review of current approaches
  • Haptic collision handling for simulation of transnasal surgery

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Recently Published Articles

  1. Interactive authoring of bending and twisting motions of short plants using hand gestures

    Kan Chen and Henry Johan

    Version of Record online: 9 FEB 2017 | DOI: 10.1002/cav.1747

    Thumbnail image of graphical abstract

    In this paper, we propose an approach to interactively author the bending and twisting motions of short plants using hand gestures, especially suitable for grass, flowers, and leaves. Our method is based on the observations that hand motions can represent the bending and twisting motions of short plants and using a hand to describe motions is natural and proficient for human. We therefore use a hand as a “puppet” to author the animation of one single short plant based on transferring the motions of a hand to the motions of a short plant. We first author the global motions of the short plant followed by the motions of its elements such as leaves and flowers. We also propose a framework to utilize the animation results to animate a field of short plants and further adjust the motion effects according to the properties of the short plants, such as rigidity. As a result, users can intuitively and rapidly author and generate their desired motions of short plants under the influence of external forces. Especially, our method is accessible to non-expert users and suitable for fast prototyping and authoring specific motions of short plants such as in cartoons.

  2. You have free access to this content
    Editorial Issue 28.1

    Nadia Magnenat Thalmann and Daniel Thalmann

    Version of Record online: 6 FEB 2017 | DOI: 10.1002/cav.1748

  3. Perceptual evaluation of synthetic gaze jitter

    Krzysztof Krejtz, Andrew Duchowski, Heng Zhou, Sophie Jörg and Anna Niedzielska

    Version of Record online: 2 FEB 2017 | DOI: 10.1002/cav.1745

    Thumbnail image of graphical abstract

    We present a procedural model to synthesize the subtleties of eye motions. Our model adds microsaccadic jitter and pupil unrest, both modeled by pink noise, to the standard main sequence. Perceptual experiments show that when the motion is data-driven or parameterized pink noise, some jitter, but not too much, is perceived as more natural than when it is excessive or absent.

  4. Robust standing control with posture optimization

    Zumra Kavafoglu, Ersan Kavafoglu and Arjan Egges

    Version of Record online: 24 JAN 2017 | DOI: 10.1002/cav.1746

    Thumbnail image of graphical abstract

    We present a physics-based approach for robust center of mass shifting during standing. Desired standing posture is defined by a number of high-level features and an online optimization process calculates the kinematic postures for the lower body and the pelvis. A physics-based arm control strategy is devised for increasing the robustness of the character. The proposed approach results in robust standing motions with automatic knee-bending behavior as the character shifts its center of mass in all dimensions.

  5. Novel fluid detail enhancement based on multi-layer depth regression analysis and FLIP fluid simulation

    Yuxing Qiu, Lipeng Yang, Shuai Li, Qing Xia, Hong Qin and Aimin Hao

    Version of Record online: 13 DEC 2016 | DOI: 10.1002/cav.1741

    Thumbnail image of graphical abstract

    In this paper, a novel integrated method for effective modeling and realistic enhancement of scale-sensitive fluid simulation details is proposed. The core of the method is the organic of multi-layer depth image regression analysis and fluid implicit particle fluid simulation, of which the regression analysis induces the criterion where the fluid details should be produced.

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