- HyperFun
HyperFun (from Hyperdimensional Functions) [R. Cartwright, V. Adzhiev, A. Pasko, Y. Goto, T. Kunii, "Web-based shape modeling with HyperFun", IEEE Computer Graphics and Applications, vol. 25, No. 2, 2005, pp. 60-69.] [J.X. Chen, [http://cs.gmu.edu/~jchen/graphics/book/ Guide to Graphics Software Tools] , Springer Verlag, New York, 2002.] [P. Bourke, [http://local.wasp.uwa.edu.au/~pbourke/dataformats/ 3D API specifications and data formats] ] is a programming language and software used to create, visualize, and fabricate volumetric 3D and higher dimensional models. Unlike other modeling packages, it can easily model objects of the quality found in reality and nature. HyperFun is based on a new mathematical framework for geometry,
function representation (FRep). In contrast to existing systems, FRep provides a uniform method to model both surface geometry and internal composition simultaneously. It is also a compact and precise framework that can represent objects with unlimited complexity and properties. Where outdated, traditional modeling systems fail, HyperFun is a significant step forward, able to digitally describe, create and modify models of any real or imagined object or environment.HyperFun is an international Free and Open Source Software project. Members of the HyperFun team make a freely associated group of researchers and students from different countries all over the world (UK, Russia, France, Japan, Norway, USA, and others). Software tools supporting HyperFun are freely available at the HyperFun Project Web site ( [http://www.hyperfun.org] ) and source code can be found at Sourceforge.net ( [http://sourceforge.net/projects/hyperfun] ).
Technically, complex geometric objects in HyperFun are constructed using simple ones (primitives) and operations on them. Any object in three-dimensional space is defined by a function of point coordinates F(x,y,z). This continuous real function is positive inside the object, negative outside, and takes zero value on its surface. Similarly, a multidimensional object is defined by a function of several variables F(x1, x2, x3, ..., xn). For example, an object changing in time can be defined by F(x,y,z,t) with t representing time. Attributes such as color or material density are also defined by corresponding functions. This constitutes the new paradigm of procedural function-based volume modeling and rendering, where object's shape and properties are locally evaluated on request using "black box" procedures.
Notes and references
External links
* [http://www.hyperfun.org/ HyperFun home page]
Wikimedia Foundation. 2010.
