Current physics-based synthesis techniques tend to synthesize the interaction between different functional elements of a sound generator by treating it as a single system. On the other hand, when dealing with the physical modeling of complex sound generators this choice raises questions about the resulting flexibility of the adopted synthesis strategy. One way to overcome this problem is to approached it by individually synthesizing and discretizing the objects that contribute to the generation of sounds. In this paper we address the problem of how to physically model the interaction between objects in a dynamical fashion, through the automatic definition and implementation of a topology model that adapts to the contact and proximity conditions between the considered objects. We propose this with reference to applications of musical acoustics.
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