Computer Animation and Virtual Worlds

Cover image for Vol. 28 Issue 3-4

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

Featured

  • 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. Detail-preserving SPH fluid control with deformation constraints

    Gang Feng and Shiguang Liu

    Version of Record online: 23 MAY 2017 | DOI: 10.1002/cav.1781

    Thumbnail image of graphical abstract

    This paper proposed a novel SPH-based fluid deformation constraint method for deforming the fluid model between different target shapes smoothly. The new method includes two parts, namely the deformation of control model and fluid detail preserving with control force transfer. For the former, it can be used to deform the control models shape and then drive fluid particles moving. For the latter, fluid detail can be preserved by this mechanism when fluid deforms. The performance of our method is efficient enough for real-time simulation.

  2. Simulating collective transport of virtual ants

    Shihui Guo, Meili Wang, Gabriel Notman, Jian Chang, Jianjun Zhang and Minghong Liao

    Version of Record online: 21 MAY 2017 | DOI: 10.1002/cav.1779

    Thumbnail image of graphical abstract

    This paper proposes a stochastic probability model to model the decision-making procedure of group individuals and trains a neural network via reinforcement learning to represent the force policy. Our method is scalable to different numbers of individuals and is adaptable to users' input, including transport trajectory, object shape and external intervention etc. The simulations show that with the strategy of reposition, the ants can avoid deadlock scenarios during the task of collective transport.

  3. Motion recognition of self and others on realistic 3D avatars

    Sahil Narang, Andrew Best, Andrew Feng, Sin-hwa Kang, Dinesh Manocha and Ari Shapiro

    Version of Record online: 21 MAY 2017 | DOI: 10.1002/cav.1762

  4. On density–flow relationships during crowd evacuation

    Brandon Haworth, Muhammad Usman, Glen Berseth, Mubbasir Kapadia and Petros Faloutsos

    Version of Record online: 21 MAY 2017 | DOI: 10.1002/cav.1783

    Thumbnail image of graphical abstract

    Using established crowd simulation techniques, we quantify the relation between crowd density and crowd flow for evacuation scenarios across different simulators to explore conformity to qualitative Level of Service (LoS) classifications. Following this study, we perform environment optimization experiments under various LoS conditions. Finally, we test the generality of optimizing under these LoS conditions. Our results motivate the need for further study, using real and synthetic crowd datasets across representative environment benchmarks.

  5. Supervised coordinate descent method with a 3D bilinear model for face alignment and tracking

    Yongqiang Zhang, Shuang Liu, Xiaosong Yang, Jianjun Zhang and Daming Shi

    Version of Record online: 21 MAY 2017 | DOI: 10.1002/cav.1773

    Thumbnail image of graphical abstract

    We propose a novel supervised coordinate descent method for learning different parameters mappings separately to reduce the cross impact caused by learning a whole-parameter mapping. Taking advantage of a 3-D bilinear model learned from public databases, our method can handle large pose and expression variations in 3-D space with accuracy–overcoming the deficiencies of existing methods. Our method is validated and compared in challenging face videos collected online.

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