The Experts below are selected from a list of 6 Experts worldwide ranked by ideXlab platform

Sun Xiu-ying - One of the best experts on this subject based on the ideXlab platform.

  • Visualization of VRML model in RP software
    Computer Engineering and Design, 2007
    Co-Authors: Sun Xiu-ying
    Abstract:

    Nowadays STL is a widely used data format in RP software,which has some disadvantages such as accuracy loss and large data redundancy,etc.VRML is a new way to the solution of those problems which has high precision,little data redundancy and support network.Visualization of VRML in RP software is investigated.Syntax parser and scene render is discussed in detail.Thus data structure is designed which is propitious to both reuse in VRML and latter data process.Then approaches are put forward to deal with grouping nested hiberarchy and OpenGL formula of parameterized Transform.Besides,a method is proposed to realize manual selection of slicing orientation by using Modelview Matrix in OpenGL.Finally visualization of VRML is realized by using Visual C++ and OpenGL.

Hassan Farhat - One of the best experts on this subject based on the ideXlab platform.

  • Transformations and Bases in OpenGL and the Viewing Pipeline
    2012
    Co-Authors: Hassan Farhat
    Abstract:

    Abstract- Geometric transformations are fundamental aspects of all computer graphics rendering and are found throughout the computer graphics pipeline. In earlier work we presented mathematical treatment of this topic. The different concepts were combined into a general mathematical procedure based on the concept of vector spaces in linear algebra. While we established the mathematical aspects of transformations, we found the application of this in the OpenGL environment was not simple, especially when the Modelview Matrix was constructed using the viewing Matrix obtained by the “gluLookAt ” function. When the gluLookAt function is used, incremental changes in viewing were possible by first re-computing the viewing Matrix in world coordinates and not by composing with incremental changes in the viewing coordinates. In this paper we look at alternative methods of application of the mathematical work in OpenGL. The two alternative procedures of rendering (transformations in world and transformation in viewing) are explored in the OpenGL environment.