A Study on 3D File Format for Web-based Scientific Visualization

다국어 초록 (Multilingual Abstract)

The most commonly used 3D modeling file formats are OBJ (Wavefront file format specification) and STL(STereoLithography). Although they have a common point of view in 3D on the screen, detailed functions aredifferent according to purpose of development. OBJ is the most commonly used 3D file format and STL is mainlyused as 3D file format for 3D printing. However, in the field of Scientific Visualization, precise analysis isrequired. There is a difference in accuracy depending on the type of 3D file format. OBJ and STL are not suitablefor delicate surface description because they form meshes in the form of triangular polygons. And if you increasethe number of triangle polygons, it will be smoother, but the file size also increases exponentially and causesexcessive CPU usage. In contrast, VTK provides a variety of polygon structures, including triangular polygonsas well as rectangular polygons and cube polygons. Thus, delicate surface depiction is possible. Delicate surfacerendering is possible and file size is not large. This paper describes the concept and structure of VTK. We alsocompared the load times and file sizes between VTK, STL, and OBJ in the Chrome browser. In addition, thedifference in surface rendering ability between VTK, STL, and OBJ is intuitively viewed based on the screen inwhich each 3D file format is implemented under the same conditions. This study is expected to be helpful forefficient 3D file format for precise implementation of Web - based Scientific Visualization.

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