Trajectory control point picking method and device for containing box surface of point cloud model

Abstract

The invention discloses a trajectory control point pickup method oriented to a containing box surface of a point cloud model. The method comprises the steps of establishing all triangular plates on a fixed point cloud model surface into a triangular plate array; constructing a minimum containing box; selecting one containing surface as a working surface; setting one point on the working surface as a target point, and constructing a ray; finding out triangular plates penetrated by the ray and constructing the triangular plates into a triangular plate chain table; and finding out a triangular plate, which is closest to the working surface, from the triangular plate chain table, and taking an intersection point between the triangular plate and the ray as an incident point and taking the target point on the working surface as a trajectory control point. Points can be selected in a fixed viewing angle and a fixed operation plane so that an operation is simple, convenient and intuitive, meanwhile a data processing flow is simplified, various aligns can also be operated in reference to a CAD (Computer-Aided Design) rough draft, the normalization of the trajectory control point is enhanced and thus the corresponding processing quality is improved.

Description

technical field [0001] The present invention relates to three-dimensional workpiece Computer Aided Design of Specific Machining Path Field, in particular to a method and device for picking up trajectory control points oriented to a containing box surface of a point cloud model. Background technique [0002] In order to meet the increasingly stringent requirements of users for the appearance quality of products, higher requirements are put forward for the surface coating operation that plays a key role in the appearance quality of products in the manufacturing process. The traditional surface spraying technology is to spray the surface of the product manually, and a large amount of harmful substances and gases are produced in the process, which seriously affects the health and work emotions of the operators, and the quality of spraying is affected by the technical level and emotional level of the employees. Factors such as greater impact, thus seriously restricting productio...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a method and device for picking up trajectory control points oriented to the containing box surface of the point cloud model, aiming to solve the problem that the three-dimensional point cloud model It is impossible to maintain a fixed posture, and it is also difficult to maintain the relationship between multiple selected path control points. This technical problem is very difficult to complete

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