Road intersection three-dimensional model automatic generation method

The invention discloses a road intersection three-dimensional model automatic generation method. The method comprises the following steps: acquiring basic parameters of the road intersection; disassembling the road intersection layer by layer according to the composition structure of the road intersection to obtain a pavement model, a sidewalk model, a lane line model and a lane guide arrow model;calculating vertex coordinates of the model; triangularizing the model by taking vertex coordinates of the model as vertex coordinates of a triangle, constructing a vertex index array according to the vertex coordinates of the triangle, and generating a triangular mesh model; creating different materials for the models respectively, and endowing the different materials to the corresponding triangular mesh models; and combining all the triangular mesh models to establish a road intersection model. According to the invention, the three-dimensional model of the road intersection can be automatically generated in a param