EG UK Theory and Practice of Computer Graphics 2006
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Browsing EG UK Theory and Practice of Computer Graphics 2006 by Subject "Categories and Subject Descriptors (according to ACM CCS): I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling"
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Item Collision Detection for Deformable Objects using Octrees(The Eurographics Association, 2006) Madera, F. A.; Day, A. M.; Laycock, S. D.; Louise M. Lever and Mary McDerbyWe present an algorithm for collision detection between multiple deformable objects translating in a large environment. We use Spatial Partitioning to subdivide the scene and a Bounding Volume Hierarchy to decompose the objects, using octrees in both cases. The algorithm is divided in two parts, the Broad and Narrow Phases, with objects that can be rigid or deformable. In the Broad Phase, an octree is used to partition the scene and cull away the object s Bounding Volumes that are distant. In the Narrow Phase, a hierarchical decomposition of Axis Aligned Bounding Boxes or spheres is employed to reduce the number of primitives in the pairwise comparisons. In summary this work is a general-purpose collision detection technique for performing real time collision detection of deformable bodies in interactive 3D applications.Item Real-Time Modelling of the Action of Wind on Liquid Surfaces(The Eurographics Association, 2006) Bristol, Amanda; Varsamidis, Thomas; Louise M. Lever and Mary McDerbyThis work in progress aims to model the appearance of the surface of various liquids, when force from a virtual wind is applied. The physical effects caused by a wind force include waves and spray. The appearance of these effects is dependent upon the physical characteristics of a liquid, such as viscosity and surface tension. Much of the realistic work carried out in this area has depended upon non real-time methods such as frame-by-frame rendering and animation. Alternatively, supercomputers have been used to process visualisation models which use large quantities of data. This study aims to produce realistic effects with an attractive appearance, in real time. Work will also be carried out to explore the possibilities of modelling breaking waves in real time.