Embedded Implicit Stand-Ins for Animated Meshes: A Case of Hybrid Modelling

In this paper, we address shape modelling problems, encountered in computer animation and computer games development that are difficult to solve just using polygonal meshes. Our approach is based on a hybrid‐modelling concept that combines polygonal meshes with implicit surfaces. A hybrid model cons...

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Bibliographic Details
Published in:Computer graphics forum Vol. 29; no. 1; pp. 128 - 140
Main Authors: Kravtsov, D., Fryazinov, O., Adzhiev, V., Pasko, A., Comninos, P.
Format: Journal Article
Language:English
Published: Oxford, UK Blackwell Publishing Ltd 01.03.2010
Subjects:
3-D graphics
Animation
Approximation
Computer & video games
Computer animation
Geometry
I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling
I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism
I.3.8 [Computer Graphics]: Applications
Simulation
Studies
Viscoelasticity
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Summary:In this paper, we address shape modelling problems, encountered in computer animation and computer games development that are difficult to solve just using polygonal meshes. Our approach is based on a hybrid‐modelling concept that combines polygonal meshes with implicit surfaces. A hybrid model consists of an animated polygonal mesh and an approximation of this mesh by a convolution surface stand‐in that is embedded within it or is attached to it. The motions of both objects are synchronised using a rigging skeleton. We model the interaction between an animated mesh object and a viscoelastic substance, which is normally represented in an implicit form. Our approach is aimed at achieving verisimilitude rather than physically based simulation. The adhesive behaviour of the viscous object is modelled using geometric blending operations on the corresponding implicit surfaces. Another application of this approach is the creation of metamorphosing implicit surface parts that are attached to an animated mesh. A prototype implementation of the proposed approach and several examples of modelling and animation with near real‐time preview times are presented.
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ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2009.01582.x