Download Computer Animation and Simulation 2001: Proceedings of the by Andrew J. Davison, Jonathan Deutscher, Ian D. Reid (auth.), PDF

By Andrew J. Davison, Jonathan Deutscher, Ian D. Reid (auth.), Prof. Dr. Nadia Magnenat-Thalmann, Dr. Daniel Thalmann (eds.)

This quantity includes the examine papers awarded on the twelfth Eurographics Workshop on desktop Animation and Simulation, Manchester, united kingdom, September 2-3, 2001. The workshop is a global discussion board for learn in computer-animation and simulation. This 12 months, we decide to offer a distinct concentrate on the modelling and animation of complicated phenomena. This comprises the modelling of digital creature- from their body-parts to the keep an eye on in their habit, and the animation of ordinary phenomena reminiscent of water, smoke, fireplace and plants. the decision for papers required submission of the total papers for overview, and every paper was once reviewed by way of no less than 2 contributors of the foreign software committee and extra reviewers. in keeping with the stories, sixteen papers have been permitted. We extra to the ultimate application an invited speak through Jos Stam. we want to thank all reviewers for his or her effort and time in operating in the inflexible constraints of the tight time table, thereby making it attainable to submit this quantity in time for the workshop. We additionally thank the authors for his or her contributions to the workshop, with no whom this special discussion board for animation and simulation paintings wouldn't exist.

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Additional info for Computer Animation and Simulation 2001: Proceedings of the Eurographics Workshop in Manchester, UK, September 2–3, 2001

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T, 3 Smoothing process In this section, we address the computation of a smooth triangle mesh generated by the control mesh and the implicit primitives. Our algorithm proceed in two steps. First, we refine the whole control mesh using an N-adic scheme. Then, we move the vertices of the subdivided mesh to create a smooth model. The overall algorithm may be outlined as follows. 1. Refine all the triangles of mesh T using the N-adic subdivision scheme. 2. 1 If T lies in the region of influence of the field function evaluate the direction of projection, project p onto the implicit surface and compute its normal as the normalized gradient of f.

The tool SurII is defined by the grid of points {Pijl }09~m,O~j~n; the handle Pijk+1Pijk is associated to the control point Pijk . We obtain the following equation: Vol(M) p-l = L Surlk(M)Br1(z) k=O In this way, the control points {Pmjp}O~i:~n and {Pinp}O~i~m are not taken in account during the deformation. As this seems to us non intuitive, we choose the first solution. In this following section, we will explain the way these tools are combined into our "Multidimensional deformation" tool and the goal on defining it as a space-time tool.

We compute the handle Tij as the normalized vector product of the two vectors Pi+ljPij and Pij+1Pij. In this way, the handles are all oriented in the same way regarding the surface and share the same norm: selfintersections and tapering are avoided. 2 Deformation algorithm As a Bezier patch is evaluated for parameter values (u, v) with u E [0,1] and v E [0,1], then our two dimensional tool only deforms points P(x,y, z) if there coordinates x and y are between and 1. O~j

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