The Research of Modeling Method of Railway 3D Landscape

It’s very important for environment simulation in the three-dimensional railway line selection and design, and the establishment of three-dimensional landscape model impacts the fidelity of simulation environment directly. The paper studied. Of the 3D landscape modeling methods and key technologies. The paper achieved three-dimensional modeling of railway line used bi-cubic coons model, realized line structures three-dimensional modeling by object-oriented modeling approach. Based on Visual C + + and Oracle databases, The paper established the structure model library and realized the effective management of the model, Solved the exact match and control problem between structure mode and the threedimensional scene, Achieved the application of structure mode in three-dimensional line landscape simulation and established a three-dimensional line landscape with higher fidelity. Developed a three-dimensional landscape line dynamic environment simulation system based on the methods and theories of paper studied. Using this system, Yunnan Tibet railway line has been designed 3D landscape modeling, Verified the correctness of the theory and algorithms of paper studied.