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Theses

Interactive design of virtual worlds : Combining procedural modeling with intuitive user control

Abstract : The complexity of virtual worlds is increasing and conventional modeling techniques are struggling to meet the constraints and amount of time required for the production of such scenes.Procedural generation techniques allow automated virtual worlds creation using algorithms, but are often non-intuitive and therefore reserved to experimented artists.Indeed, these methods offer few controls to users and are rarely interactive.Moreover, the user often needs to find values of several parameters by performing a series of trial and error, until obtaining a satisfactory result, which is a long and tedious task.The objective of this thesis is to combine the power of procedural modeling with intuitive user control to propose intuitive and interactive methods for modeling virtual worlds.We propose several methods combining procedural modeling and intuitive control, gradually increasing their interactive aspect.Thus we present:- a technique for procedural modeling of villages over arbitrary terrains, whose elements are subject to strong environmental constraints,- an interactive technique for procedural modeling of waterfall sceneries, based on an intuitive user control and the automated generation of a consistent content, in regard of hydrology and terrain constraints,- an sketch-based technique for editing terrains, where terrain features are extracted and deformed to fit the user sketches,- an interactive method for virtual world painting, where example-based synthesis of vectorial elements methods are used to automate deformation and editing of the scene while maintaining its consistency.
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Arnaud Emilien. Interactive design of virtual worlds : Combining procedural modeling with intuitive user control. Graphics [cs.GR]. Université de Grenoble, 2014. English. ⟨NNT : 2014GRENM067⟩. ⟨tel-01147917v2⟩

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