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

A point cloud model and trajectory control technology, applied in 3D modeling, instruments, geometric CAD, etc., can solve the problem that it is not easy to complete, the 3D point cloud model cannot maintain a fixed posture, and it is difficult to maintain the relationship between multiple selected path control points and other issues to achieve good consistency, improve standardization, and improve processing quality

Active Publication Date: 2020-03-10
GUANGDONG UNIV OF TECH
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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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  • Trajectory control point picking method and device for containing box surface of point cloud model
  • Trajectory control point picking method and device for containing box surface of point cloud model
  • Trajectory control point picking method and device for containing box surface of point cloud model

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Embodiment Construction

[0063] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0064] refer to figure 1 , figure 1 It is a schematic flowchart of the first embodiment of the method for picking trajectory control points oriented to the containing box of a point cloud model in the present invention.

[0065] Step S1, constructing an array of triangular slices.

[0066] That is, using a triangle meshing processing algorithm to determine and generate all triangles on the surface of a given point cloud model, and constructing all triangles as a triangle array.

[0067] Step S2, constructing a minimal containment box.

[0068] That is, the minimum enclosing box is constructed according to the maximum coordinate value and the minimum coordinate value of the given point cloud model in the three-dimensional coordinate system.

[0069] Step S3, selecting a working surface.

[0070] That is, one con...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/18G06T17/20
CPCG06F30/18G06F30/23G06T17/20
Inventor 吴磊关日钊杨明江陈新度罗坚铭付朋杨宗泉
Owner GUANGDONG UNIV OF TECH
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