Method for comparing similarity and difference between drawings

Abstract

The invention discloses a method for comparing similarity and difference between drawings, which is automatically executed by a computer and displays the similarity and difference in the drawings according to a comparison result. The method comprises: a first step, determining primitive ranges to be compared and primitive options to be compared in the drawings to be compared; a second step, reading each primitive option to be compared of each primitive to be compared in the primitive ranges to be compared in the drawings to be compared; a third step, selecting one drawing in the drawings to be compared to carry out regional division for the integral spatial range, distributing a spatial sequence number for each primitive of each drawing to be compared, and ordering data of the primitive options according to the spatial sequence number; and a fourth step, comparing the option data of each primitive of one drawing to be compared and the option data of the primitive of the other drawing with the same spatial sequence number, and determining the similarity and difference. The method for comparing the similarity and difference between the drawings has the advantages of small calculation amount and high speed.

Description

Technical field [0001] The present invention relates to a method for comparing the similarities and differences between drawings, in particular to a method for comparing the similarities and differences between two drawings stored in the form of electronic documents, and further relates to a method for comparing drawings generated by using CAD drawing software. Background technique [0002] Drawings are the main method used by design companies to express design ideas and technical exchanges with construction companies. Therefore, they are widely used in various industries such as architectural design, manufacturing, water conservancy, and decoration. However, the large number of drawings has brought major challenges to management. The difficulty of drawing management is not only the large number, but also the large number of versions. Because the drawing from the completion of the design to the completion of the construction, it often requires a process of repeated revision and ...

AI Technical Summary

Problems solved by technology

Therefore, it is much more difficult to control the color of the primitives in the block than to control the color of ordinary primitives

[0006]Second, the pairing comparison can only be made according to the handle of the primitive (handle, that is, the unique identification of the primitive in the drawing), not only based on the specific attributes of the primitive (i.e. compare graphically) compare

Especially when the number of primitives reaches hundreds of thousands or more, the comparison time will be unbearable and lose practical significance

[0007]Third, you cannot compare custom primitives

These primitives can only obtain a few external attributes, and the internal complex attributes cannot be obtained, so the existing comparison software cannot perform in-depth comparison

[0008] Fourth, the difference cannot be displayed in the current drawing, which will cause great inconvenience to users

Although the primitives copied to another drawing can still maintain their appearance, the specific attributes, such as handles, block names, etc., have changed

Bring a lot of inconvenience to positioning and modification

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