基于TIN的潜水层三维建模仿真应用

TIN-BASED DIVING LAYER 3D MODELLING EMULATION APPLICATION

地下水过度开采已经导致许多城市和地区发生地面沉降、环境恶化等严重地质灾害问题。依据监测点提供的地下水水位原始数据,用Lagrange插值法相继求出满足建立三维模型所需要的多个控制点,实现三维层的边界圈定。以此为基础,运用不规则三角形网数据模型(TIN)和离散算法,建立最优网络拓扑关系的线框模型。最后运用OpenGL技术对表面模型进行可视化渲染。完成后的潜水层三维模型实现了二维数据图形化,生动直观逼真。该项研究对监测潜水层的变化走向,进行及时有效地科学决策,预防地质灾害发生,具有重要意义。

The over-exploitation of underground water has caused such catastrophic geographic problems as land subsidence,environmental deterioration and so forth in many cities and regions.According to the original data of underground water level provided by monitoring stations, Lagrange interpolation is adopted to figure out control points that meet the requirements to build the three-dimensional model,so that the three-dimensional layer boundary is defined.Built on this,by using the irregular triangular network（TIN） data model and the discrete algorithm, the optimal network topology of wire-frame model is established.Finally the OpenGL technology is adopted to render the surface model visualisation.The three-dimensional model of diving layer transforms two-dimensional data to intuitive and vivid graphics.The research is of great significance to the study of monitoring directional changes of the diving layer,helpful for timely and effective scientific judgements, and prevention of geological disasters.