Technology Research And Application On 3D Geological Model Visualization Analysis

3D geological model visualization analysis technology came to human attention in the early1990s of the 20th century, and gradually has become mathematical geology, oil exploration,geotechnical engineering, GIS and scientific visualization areas of research and application ofhot, At present It has become a hot one in the areas of geology. 3D geological model of the keytechnologies of space objects 3D model, make full use of existing two-dimensional GIS data and3D geological modeling and spatial analysis model pick up, query, Cutting volume measurementin the future urban construction, geological exploration work is to provide constructive ideas tohelp, it is difficult and crucial as well as relevant academic research.3D geological model space analysis is a modem space information theory to study theformation and information processing environment. Data Organization, space modeling anddigital expression and the use of scientific visualization technology to the environment andstratigraphic information reappearance true 3D visualization and interactive science andtechnology. 3D geological model conduct spatial analysis of key technology and applicationresearch in a number of key mining research, for the promotion of geological related fields ofinformation technology, improving management efficiency and decision support analysis, is ofgreat significance.Based on information-based drilling data and the use of the correspondingthree-dimensional topological data structure, a three-dimensional geological model, eventuallyachieve a three-dimensional geological model of point, line, surface three formats. 3D OpenGLgraphics interface, Direct3D and MFC Integrated Development, the geological model ofscientific visualization; through the use of existing equipment 2D 3D simulation method, Arcballalgorithm using the mouse to control the rotational effect without delay to achieve athree-dimensional geological model of translation, rotation, scaling, and other operating spaceand light, material, color effects such as texture, so well resolved three-dimensional geologicalmodel of interactive control; Study of the triangular cutting, Reconstruction of a number of keyalgorithms: "intersection-the side-Reconstruction" algorithm, Constraint-based DelaunayTriangulation arbitrary polygon (with the island or islands) triangulation algorithm, solved thecut-profile complex geological formation; solved the cut-profile complex geological formation; Study points in the judgment of the many facets of the two sub-bound algorithm, and thegeological Cutting Display, the tunnel simulation, excavation, Volume measurement and spatialinformation query and analysis; arbitrary cross section of the tunnel modeling methodSlice-based 3D geometry model of thinking, as a cross-section of a tunnel reference plane, italong the tunnel axis movement, the establishment of the tunnel model, the use of arbitrary shapecutting space triangulation algorithm, and the tunnel cutting, Establishment and stratigraphicattributes of the tunnel model and record the tunnel cut path, production line documents, videorecording, Generation tunnel simulation video files, the tunnel achieve internal dynamicsimulation.Based on the above results with the actual project and the use of Visual C++ 6.0 and 3Dgraphics for the basic design to develop 3D model visualization and analysis system. The thesisof the system is the realization of the program, the main modules of the system and someexamples of the output.3D geological model visualization analysis technologies facing four major difficulties:1) 3-D geological data types of diversity and the difficulties of access.2) analysis of three-dimensional space capacity limitations.3) 3D graphics geological data varied expressions, so many needs.4) 3D geological model is not only an expression of 3D objects (ground and surfacebuildings on the surface), also expressed objects, such as mine, and undergroundobjects. How ore and other performance 3D surface shape and reflect the internalstructure is a difficult problem.Finally, the thesis of this research provideds a comprehensive summary and points out thecurrent study its weaknesses and future research directions.