Technical Section: Interactive function-based shape modelling
Computers and Graphics
Streaming of plants in distributed virtual environments
MM '08 Proceedings of the 16th ACM international conference on Multimedia
Compact and progressive plant models for streaming in networked virtual environments
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
Modeling trees with a space colonization algorithm
NPH'07 Proceedings of the Third Eurographics conference on Natural Phenomena
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In recent years several methods for modeling botanicaltrees have been proposed. The geometry and topology oftree skeletons can be well described by L-systems; however,there are several approaches to modeling smooth surfacesto represent branches, and not all of the observed phenomenacan be represented by current methods. Many tree typesexhibit non-smooth features such as branch bark ridges andcollars.In this research a hierarchical implicit modeling systemis used to produce models of branching structures thatcapture smooth branching, branch collars and branch barkridges. The BlobTree provides several techniques to controlthe combination of primitives, allowing both smooth andnon-smooth effects to be intuitively combined in a singleblend volume. Irregular effects are implemented using PreciseContact Modeling, Constructive Solid Geometry andspace warping. We show that smooth blends can be obtained,without noticeable bulging, using summation of distancebased implicit surfaces. L-systems are used to createthe branching structure allowing botanically based simulationsto be used as input.