Potential Field And Geological Model Of Three-Dimensional Display

The amazing development of visualizing theory and computer graphic provides the profound basis of theory and practice. The geological model visualizing can improve the use ratio and readability of meter data dramatically, which make data producing, processing and analyzing work easy to fulfill for geologists. The project designs three dimensional displays, the color fulfilling of isoline and three dimensional texts labeling to the value of isoline with parts of meter data.The thesis firstly presents grid processing of discrete data. The meter data caught in real geologic survey is discrete. Therefore these raw data must be processed with grid before they are fulfilled with three dimensional visualizing methods. There are two types of traditional grid processing:one is triangle grid method; the other one is rectangle grid method. Our work can process discrete data with any method according to the internal characteristic of meter data; otherwise, we can also process the same raw data with two methods and then compare the results.Then, based on triangle grid or rectangle grid, we carry out the design of isolinepoint computing, isolinepoint tracking, smoothing color fulfilling of isoline respectively. Because of many disadvantages of triangle color fulfilling, we introduce the color fulfilling method based on polygon. The meth-od can fulfill color of isoline with two layer models, as well as isoline with single layer more effectively, which helps us detect internal relations of different survey caption data in the same survey regions.Next, The text labeling of isoline value in the visualizing field of three dimensional geologic model has never be conducted, even though the same research in two dimensional geologic graph has achieved a great development. The work of three dimensional texts labeling is much more difficult than two dimensional texts labeling because of its space complexity. We resolved the questions of text character reversing, labeling position defect, rotating and moving of labeling character which occur frequently during three dimensional texts labeling respectively. The application in the practice shows that our job has got a great result.Finally, the thesis introduces the development process of OpenGl in VC++6.0 to display the result, makes the final conclusion, and then provides further research field.