Based on the knowledge of plane geometry and solid geometry, a formula for calculating the three-dimensional (3D) coordinate and direction of curve (straight) line by using plane topological graph of railway station is derived. According to the coordinate and direction of track center line, a formula is deduced to calculate 3D coordinates of entity vertex. One side in the topological graph of railway station is arbitrarily selected as the initial side. According to the cohesive relationship oi sides, the frog number of turnout, the data of permanent way as well as data of signals and communications, the formula for calculating the 3D coordinate and direction of curve (straight) line is used to work out the coordinate and direction of all sides in the topological graph of station. The obtained results are regarded as the location and direction of track center line. Based on track center line, and according to standard track gauge, the size of point communication equipment and the data of track profile, the formula for calculating the 3D coordinates of entity vertex is adopted to work out the vertex coordinates of the outside surface which constitute the track and equipment to generate the 3D scene of railway station. The 3D scene can be used for the synchronous 3D scene display of large-scale operation simulation of railway station.%利用车站平面拓扑图,根据平面几何和立体几何知识,推导曲(直)线三维坐标和方向的计算公式；根据线路中心线的坐标和方向,推导实体顶点的三维坐标计算公式.在车站平面拓扑图上以任选的1条边作为初始边,根据边的衔接关系、道岔的辙岔号、工务及电务数据,采用曲(直)线三维坐标和方向计算公式,计算车站平面拓扑图内所有边的坐标和方向,作为线路中心线的位置和方向；以线路中心线为基准,依照轨道标准轨距、点式电务设备的尺寸和线路纵断面数据,采用实体顶点的三维坐标计算公式,计算组成轨道和设备的外表面的顶点坐标,生成铁路车站三维视景.该三维视景可用于大规模车站作业仿真的同步三维视景展示.
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