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Real-time model experiments for deformable object simulation

Es, E. van der (2006) Real-time model experiments for deformable object simulation. Master's Thesis / Essay, Computing Science.

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In the field of computer graphics deformable object models have not really conquered the real-time industry Despite decades of research it seems that the models that are currently available do not appeal to game developers and other virtual environment specialists very much. Deformablebody simulation requires a significant amount of processing power and there are limitations on the range of materials that can be handled and the amount of 'abuse' it can take. An important field where the deformable object simulation is of big interest is virtual surgery, which offers virtual medical training. Though workers in this field are willing to invest in powerful hardware, current models leave much to be desired for there as well.With an open mind we started to think of possibly new models that would offer an improvement of these issues for linear elastic material simulation. We aimed for a model that could produce reasonably accurate real world approximations based on real world material parameters. Preferably such a model has an intuitive design and runs at or close to real-time rates. We did not look deep into features like the support for cutting or fracturing the body during simulation at this point. Three models are discussed in this paper, in the order by which we have studied them. The first two are strongly relying on the traditional mass-spring principles. We started of with the CMPM, a model that a fellow student worked on under the same supervisor. We increased the performance by using another type of numerical integrator and analysed the driving mechanism. The second model was an experiment to see if we could indirectly produce correct shear response. The third model is not directly based on traditional massspring systems. The dynamics of the simulated body is the result of the behaviour of separately modeled tetrahedra, connected to each other at their vertices. Though not tested rigorously, experiments with simple shapes produced responses that so far are close to what one would expect from pure linear materials. Preceding the three model descriptions are two chapters on continuum mechanics and computational physics. Both chapters are added to provide a reference to the fundamentals which these types of simulations are based on.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Computing Science
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:30
Last Modified: 15 Feb 2018 07:30

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