CN115081075A - Automatic method for converting three-dimensional information model into two-dimensional design drawing - Google Patents
Automatic method for converting three-dimensional information model into two-dimensional design drawing Download PDFInfo
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Abstract
The invention discloses an automatic method for converting a three-dimensional information model into a two-dimensional design drawing, wherein a three-dimensional model is designed by a three-dimensional model designer, and attribute information is added to each part of the model after the three-dimensional model is designed; exporting the three-dimensional model into a three-dimensional drawing format by using three-dimensional model design software; opening the three-dimensional drawing in two-dimensional drawing design software; generating a two-dimensional drawing according to the three-dimensional model information on the drawing; the method saves the process of redrawing the two-dimensional drawing, can be easily operated by designers without special learning, retains topological information after projection, can be applied deeply, can quickly complete the regeneration of the drawing when the design is changed, and ensures the consistency of the drawing and a model; the working efficiency and the working enthusiasm of designers can be greatly improved, so that the working output is improved, and more time is provided for the designers to carry out more creative work.
Description
Technical Field
The invention relates to the field of building design, in particular to an automatic method for converting a three-dimensional information model into a two-dimensional design drawing.
Background
With the wider application of the BIM technology in the building industry, more and more building projects adopt a BIM forward design mode to transmit information to a downstream stage (for example, construction) through a three-dimensional BIM model. The curtain wall design serving as the building subdivision direction relates to the two fields of buildings and machinery, and due to the fact that the difference of design tools required by the two fields is large, a curtain wall designer cannot fully utilize a three-dimensional BIM model of a building, often needs to redesign and generate a machining drawing in another design tool according to drawing parameters of the building, any design change in the upstream needs to be manually changed, design efficiency is low, and drawing quality cannot be guaranteed, and therefore the automatic method for converting the three-dimensional information model into the two-dimensional design drawing is provided.
Disclosure of Invention
The invention aims to provide an automatic method for converting a three-dimensional information model into a two-dimensional design drawing aiming at the defects of the prior art so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an automatic method for converting a three-dimensional information model into a two-dimensional design drawing is characterized in that a conversion channel is built between the three-dimensional information model and the two-dimensional design drawing, and the specific steps are as follows:
step 1: designing a three-dimensional model by a three-dimensional model designer, and adding attribute information to each part of the model after the three-dimensional model is designed;
step 2: exporting the three-dimensional model into a three-dimensional drawing format by using three-dimensional model design software;
and step 3: opening the three-dimensional drawing in two-dimensional drawing design software;
and 4, step 4: generating a two-dimensional drawing according to the three-dimensional model information on the drawing;
and 5: and judging that the design needs to be changed, returning to the step 1 for redesign when the design needs to be changed, and ending the conversion when the design does not need to be changed.
As a preferred embodiment of the present invention, attribute information such as a floor and a type is added in step 1.
As a preferred technical solution of the present invention, when the three-dimensional drawing in step 2 is opened in the two-dimensional drawing design software, the attribute information added in step 1 is also retained therein.
As a preferred technical solution of the present invention, in the process of generating the two-dimensional drawing in step 4, a projection algorithm is adopted to project each part of the model onto one plane, information added in the model is used to divide the graph in the drawing, and the hierarchical relationship is processed, and the projected result is the two-dimensional drawing to be generated.
As a preferred technical solution of the present invention, after the projection in step 4, the two-dimensional lines still retain the topology information of the three-dimensional solid, so that the division condition of the original three-dimensional model can be seen in the two-dimensional drawing, and further, the topology information can be utilized to perform the depth application.
As a preferred embodiment of the present invention, the topology information is applied in depth, for example, filling a pattern into each area composed of two-dimensional lines.
The invention has the beneficial effects that: the method saves the process of redrawing the two-dimensional drawing, can be easily operated by designers without special learning, retains topological information after projection, can be applied deeply, can quickly complete the regeneration of the drawing when the design is changed, and ensures the consistency of the drawing and a model;
the work efficiency and the work enthusiasm of designers can be greatly improved, so that the work output is improved, more creative work can be performed in more time, a more valuable model is designed, the correctness of the drawing is ensured, the probability of rework can be reduced, a large amount of time is not needed to be spent on the regeneration of the drawing, and more careful modification can be performed to achieve a more perfect model.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a partial block diagram of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention.
Example (b): referring to fig. 1-2, the present invention provides a technical solution: an automatic method for converting a three-dimensional information model into a two-dimensional design drawing is characterized in that a conversion channel is built between the three-dimensional information model and the two-dimensional design drawing, and the specific steps are as follows:
step 1: designing a three-dimensional model by a three-dimensional model designer, and adding attribute information to each part of the model after the three-dimensional model is designed;
step 2: exporting the three-dimensional model into a three-dimensional drawing format by using three-dimensional model design software;
and step 3: opening the three-dimensional drawing in two-dimensional drawing design software;
and 4, step 4: generating a two-dimensional drawing according to the three-dimensional model information on the drawing;
and 5: and judging that the design needs to be changed, returning to the step 1 for redesign when the design needs to be changed, and ending the conversion when the design does not need to be changed.
Adding attribute information such as floors and types in the step 1; when the three-dimensional drawing in the step 2 is opened in the two-dimensional drawing design software, the attribute information added in the step 1 is also retained in the three-dimensional drawing; in the process of generating the two-dimensional drawing in the step 4, each part of the model is projected onto a plane by adopting a projection algorithm, the graph in the drawing is divided by using information added in the model, the hierarchical relationship is processed, and the projected result is the two-dimensional drawing to be generated; after the projection in the step 4, the two-dimensional lines still retain the three-dimensional topological information, so that the division condition of the original three-dimensional model can be seen in the two-dimensional drawing, and further, the topological information can be utilized for deep application; the topology information is applied deeply, such as filling patterns for each area composed of two-dimensional lines.
The working principle is as follows: an automatic method for converting a three-dimensional information model into a two-dimensional design drawing is characterized in that a three-dimensional model is still designed by a three-dimensional model designer at the beginning, after the design is finished, attribute information such as floors and types is added to each part of the model, the information can be used when the drawing is converted later, then three-dimensional model design software is used for exporting the three-dimensional model into a three-dimensional drawing format, the three-dimensional drawing can be opened in the two-dimensional drawing design software, and the added attribute information can be kept in the three-dimensional drawing format;
after the three-dimensional drawing is opened in two-dimensional drawing design software, each part of the model is projected to a plane by using a projection algorithm, the graph in the drawing is divided by using information added in the model, the hierarchical relationship is processed, the projected result is the two-dimensional drawing which needs to be generated, and the two-dimensional drawing can be used as a formal construction drawing after a drawing frame and some labels are added;
moreover, after projection, the two-dimensional lines still retain three-dimensional topological information, so that the division condition of the original three-dimensional model can be seen in a two-dimensional drawing, and further, depth application can be performed by utilizing the topological information, for example, patterns are filled in each area formed by the two-dimensional lines; if no topological information exists, the user does not know which area needs to be filled with what pattern, and after the user does, the user can automatically know which areas are integrated and have what purpose, and the patterns are automatically filled into the areas;
the whole process only needs three-dimensional model design software to manually add some attribute information, and the rest can be automatically completed by a computer; the design efficiency is greatly improved, the obtained result is completely converted from the three-dimensional model, and the difference generated in redrawing can be avoided; when the design is changed, the new two-dimensional drawing can be quickly generated by only modifying the changed attribute information and reapplying the process.
After the designer installs the existing three-dimensional model design software and two-dimensional drawing design software on a computer, the designer installs the corresponding plug-in, and then the method can be used for carrying out the automatic conversion from the three-dimensional information model to the two-dimensional drawing design, and the operation is very simple and convenient.
The method saves the process of redrawing the two-dimensional drawing, can be easily operated by designers without special learning, retains topological information after projection, can be applied deeply, can quickly complete the regeneration of the drawing when the design is changed, and ensures the consistency of the drawing and a model;
the working efficiency and the working enthusiasm of designers can be greatly improved, so that the working output is improved, more creative work can be performed in more time, a more valuable model is designed, the correctness of the drawing is ensured, the probability of rework is reduced, a large amount of time is not needed to be spent on the regeneration of the drawing, and more careful modification can be performed to achieve a more perfect model.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. An automatic method for converting a three-dimensional information model into a two-dimensional design drawing is characterized by comprising the following steps: a conversion channel is established between a three-dimensional information model and a two-dimensional design drawing, and the specific steps are as follows:
step 1: designing a three-dimensional model by a three-dimensional model designer, and adding attribute information to each part of the model after the three-dimensional model is designed;
step 2: exporting the three-dimensional model into a three-dimensional drawing format by using three-dimensional model design software;
and step 3: opening the three-dimensional drawing in two-dimensional drawing design software;
and 4, step 4: generating a two-dimensional drawing according to the three-dimensional model information on the drawing;
and 5: and judging that the design needs to be changed, returning to the step 1 for redesign when the design needs to be changed, and ending the conversion when the design does not need to be changed.
2. The automated method for converting a three-dimensional information model into a two-dimensional design drawing according to claim 1, wherein: attribute information such as floor and type is added in said step 1.
3. The automated method for converting a three-dimensional information model into a two-dimensional design drawing according to claim 1, wherein: and (3) when the three-dimensional drawing in the step (2) is opened in the two-dimensional drawing design software, simultaneously, the attribute information added in the step (1) is also retained in the three-dimensional drawing.
4. The automated method for converting a three-dimensional information model into a two-dimensional design drawing according to claim 1, wherein: in the process of generating the two-dimensional drawing in the step 4, each part of the model is projected onto a plane by adopting a projection algorithm, the graph in the drawing is divided by using information added in the model, the hierarchical relationship is processed, and the projected result is the two-dimensional drawing to be generated.
5. The automated method for converting a three-dimensional information model into a two-dimensional design drawing according to claim 1, wherein: in the step 4, after the projection, the two-dimensional lines still retain the three-dimensional topological information, so that the division condition of the original three-dimensional model can be seen in the two-dimensional drawing, and further, the topological information can be utilized for deep application.
6. The automated method of converting a three-dimensional information model into a two-dimensional design drawing of claim 5, wherein: the topology information is applied deeply, such as filling patterns for each area composed of two-dimensional lines.
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| CN202210754330.4A CN115081075A (en) | 2022-06-28 | 2022-06-28 | Automatic method for converting three-dimensional information model into two-dimensional design drawing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115344905A (en) * | 2022-10-19 | 2022-11-15 | 青岛艾德软件有限公司 | Method and system for automatically generating two-dimensional engineering drawing based on three-dimensional model |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115344905A (en) * | 2022-10-19 | 2022-11-15 | 青岛艾德软件有限公司 | Method and system for automatically generating two-dimensional engineering drawing based on three-dimensional model |
| CN115344905B (en) * | 2022-10-19 | 2023-02-03 | 青岛艾德软件有限公司 | Method and system for automatically generating two-dimensional engineering drawing based on three-dimensional model |
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