Spraying path generation method based on CAD digital-analog surface information data

The invention provides a spraying path generation method based on CAD digital-analog surface information data, and belongs to the field of automatic generation of tool paths, and the method comprises the following steps: 1) establishing a surface information data structure, and setting process parameters: a spraying overlap distance and a spraying distance; 2) determining a spraying direction and whether spraying can be performed according to the surface information data, storing the surface data, generating topological information, obtaining topological data of a relationship between surfaces, and generating combined surface weight data according to the surface data and the surface topological data; and 3) finding the surface with the maximum weight from the combination surface vector (surface topological data), automatically generating a spraying path, then finding the surface with the maximum weight from the residual surface topological data, generating the spraying path, and so on, so that the spraying pa