Research And Application Of Three-dimensional Modeling Technology On The Volume Measurement

With the development of CAD and Computer Graphics, geometry model technology has received extensive research and application in a lot of fields, but study freshly in the surveying and mapping fields. And with the development of measuring instrument, measuring automatic degree has been improved constantly, and surveying dynamically have been used widely in surveying projects, It is one of the basic goal in survey to obtain physics data of nature object and geometry data, the combination of measuring data and the needs of the structures of entity model must depend on the visual technological means under CAD, The visualization technology, for the huge measuring data, realize people and mathematics model and vision of machine exchange with message circulating. Form the cabin measurement; this paper makes thorough research on the following aspects:1. The research of the Georobot application. The automatic measuring system is made up of Georobot TCRA1101, external CCD camera, remote controllable and movable platform and the controlling PC computer, So it can realize the instrument operation and automation of datum gathering.2. The Three-dimensional measuring dispersed points become into Delaunay triangle triangulations. By utilizing CAD/CAM geometry model technology, It can concentrate the point of projection of the divided dispersion on two-dimentional Delaunay trigonometry division or Delaunay trigonometry division of regular space curved surface. Finally, according to neighboring relation of the point of the projection, This can form Delaunay triangle triangulations. On the basis of algorithm of producing, this paper has improved and optimized the formation of the Delaunay triangulation algorithm.3. Based on OpenGL, This paper have studied the visualization of the cabin three-dimension model. It use visual technology and analyze the magnanimity data, modeling and showing. So it can realize the edition, dealing with and analyses of the strange characteristic;4. Based on the three-dimensional model, This paper have also studied calculation of the volume of the cabin.