CN115510550A - Method for automatically identifying and positioning special-shaped linear structure based on Revit - Google Patents
Method for automatically identifying and positioning special-shaped linear structure based on Revit Download PDFInfo
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Abstract
The invention provides a method for automatically identifying and positioning a special-shaped linear structure based on Revit, which comprises the steps of writing a mapping rule of a section library into a family type of a special-shaped linear family of a Revit model, and adding family parameters for the special-shaped linear family; screening out a special-shaped linear model; acquiring geometric surface information of the special-shaped linear model; completing family identification, namely section mapping, and obtaining the geometrical information of the section of the correspondingly completed model; and generating a drawing and automatically marking. The method can automatically identify the special-shaped linear model in the BIM model, read the geometric information of the special-shaped linear model, and generate the dimension labels of the section view and the plan view and the label of the relationship with the axis network. Compared with the condition that drawing is missed because the existing BIM-based drawing product cannot identify the special-shaped component, the method can enable software to identify the special-shaped linear component with any section. Compared with a CAD manual drawing, the drawing generation method has the advantages that the section and the plane drawing are automatically generated, the drawing accuracy is guaranteed, and the efficiency of workers is effectively improved.
Description
Technical Field
The invention relates to a method for automatically identifying and positioning a special-shaped linear structure based on Revit.
Background
Under the condition that various building structure forms are increasing day by day, special-shaped linear structures such as special-shaped spline boundaries, grooves with various sections, special-shaped beams, variable-section beams with various forms and the like often appear in the actual construction process. In the traditional construction drawing, besides the dimension of the projection surface and the elevation of each line, a detailed node drawing is required, and the section is marked; the complicated and fussy spline plane section is easy to cause wrong identification such as missing and the like.
The BIM software which is most widely applied in the field of BIM at present has no difference between the positioning marking of the special-shaped structure and the CAD, the components need to be manually cut and marked one by one, and the plotting efficiency is not high.
In addition, although the BIM drawing software subjected to secondary development can realize automatic labeling of a conventional component, the special-shaped component cannot be identified, or the identification of each section needs to be separately subjected to secondary development, but the special-shaped structure in the engineering is different along with different projects, and if the special-shaped component cannot be automatically identified, the automatically generated drawing has certain defects of the special-shaped component.
Disclosure of Invention
The invention aims to provide a method for automatically identifying and positioning a special-shaped linear structure based on Revit.
In order to solve the problems, the invention provides a method for automatically identifying and positioning a special-shaped linear structure based on Revit, which comprises the following steps:
step 1: creating a cross-section library of profiled linear members, the cross-section library comprising: type or shape of cross-section and cross-sectional parameters;
and 2, step: writing the mapping rule of the section library into the family type of the special-shaped linear family of the Revit model, and adding family parameters for the special-shaped linear family;
and 3, step 3: screening out a special-shaped linear model which is subjected to stretching change based on a reference line in the Revit model through an API;
and 4, step 4: acquiring geometric surface information of the special-shaped linear model, comprising the following steps: model section information and top surface information;
and 5: automatically identifying geometric parameter information of all surfaces of the special-shaped linear model to complete family identification, namely section mapping, and obtaining correspondingly finished model section geometric information;
step 6: and generating a drawing and automatically marking the drawing based on the corresponding finished model section geometric information.
Further, in the above method, step 4: acquiring geometric surface information of the special-shaped linear model, comprising the following steps: model cross-section information and top surface information, including:
step 4.1: acquiring a base line of the special-shaped linear member according to the Location attribute of the linear member;
step 4.2: automatically acquiring the section information of the linear model based on the baseline;
step 4.3: based on the baseline, top surface information of the linear model is automatically acquired.
Further, in the above method, step 4.2: based on the baseline, automatically acquiring linear model section information, including:
and judging a plane intersecting with the model base line in the three-dimensional geometric figure of the linear model as a linear model section, and automatically acquiring the section information of the linear model based on the linear model section.
Further, in the above method, step 4.3: based on the baseline, automatically acquiring top surface information of the linear model, comprising:
acquiring a plane which is parallel to the base line and the normal direction of the plane facing out of the model intersects with the direction (0, 1) to form an acute angle; if the acquired surface is vertically projected to a horizontal plane to form a new graph, judging that the acquired surface is the top surface of the linear model;
and acquiring linear model top surface information based on the linear model top surface.
Further, in the above method, step 5: automatically identifying geometric parameter information of all surfaces of the special-shaped linear model to complete family identification, namely section mapping, and obtaining correspondingly finished model section geometric information, wherein the method comprises the following steps:
step 5.1: automatically acquiring geometric surface information of the special-shaped linear model and inputting the geometric surface information into the section library;
and step 5.2: and corresponding the group parameters for controlling the section shape in the group type to the section parameters of the shape in the section library to obtain the corresponding finished model section geometric information.
Further, in the above method, step 6: generating a drawing and automatically marking based on the corresponding finished geometric information of the section of the model, comprising the following steps:
step 6.1: and generating a profile based on the corresponding finished geometric information of the section of the model, and automatically marking the dimension of the section.
Further, in the above method, step 6.1: generating a profile diagram and automatically marking the sectional dimension based on the correspondingly completed geometric information of the section of the model, wherein the method comprises the following steps:
calling API (application programming interface) for Revit to draw detailed graphs according to the automatically acquired geometric information of the cross sections of the linear models, drawing the detailed graphs, and drawing the cross sections of the models by introducing cross section side line information; and calling the dimension information in the group parameters according to the geometric information of the section of the correspondingly finished model, and carrying out one-key automatic dimension marking on the section by using the Foreach cycle.
Further, in the above method, step 6: generating a drawing and automatically marking based on the correspondingly finished geometric information of the section of the model, wherein the method comprises the following steps:
step 6.2: and generating a plane graph and automatically marking the size of the projection plane and the positioning relation with the axis based on the geometric information of the section of the correspondingly finished model.
Further, in the above method, step 6.2: based on the geometric information of the corresponding finished model section, generating a plane diagram and automatically marking the size of a projection surface and the positioning relation with an axis, comprising the following steps:
creating a plan view according to the floor elevation in the Revit model, and marking the position of the edge of the model projection plane by using the correspondingly finished geometric information of the model top surface; and calling a Revit API to create the distance from the projection plane edge to the axis.
Compared with the prior art, the method has the advantages that a section library of the special-shaped linear component is created; writing the mapping rule of the section library into the family type of the special-shaped linear family of the Revit model, and adding family parameters for the special-shaped linear family; screening out a special-shaped linear model which is subjected to stretching change based on a reference line in the Revit model; acquiring geometric surface information of the special-shaped linear model; automatically identifying geometric parameter information of all surfaces of the special-shaped linear model to complete family identification, namely section mapping, and obtaining correspondingly finished model section geometric information; and generating a drawing and automatically marking the drawing based on the corresponding finished model section geometric information. The method can automatically identify the special-shaped linear model in the BIM model, read the geometric information of the special-shaped linear model, and generate the dimension labels of the section view and the plane view and the label of the relationship with the axis network. Compared with the situation that drawing is omitted due to the fact that the existing BIM-based drawing product cannot identify the special-shaped component, the method can enable software to identify the special-shaped linear component with any section. Compared with a CAD manual drawing, the drawing automatic generation method has the advantages that the section and the plane drawing are automatically generated, the drawing accuracy is guaranteed, and the efficiency of workers is effectively improved.
Drawings
FIG. 1 is a flow chart of a method for automatically identifying and positioning a graph based on a Revit's deformed linear structure according to an embodiment of the present invention;
fig. 2 is a schematic software interface diagram of a pop-up window implementation of the automatic irregular linear family recognition apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1 and 2, the invention provides a method for automatically identifying and positioning a special-shaped linear structure based on Revit, which comprises the following steps:
step 1: creating a cross-section library of profiled linear members, the cross-section library comprising: type or shape of cross-section and cross-sectional parameters. Constructing a special-shaped linear section library, and determining a text description format of section information (Type = section Type); a1= xxx; a3= xxx; a4= xxx; a2= xxx \8230; ]. The specific format meanings are as follows: type = Type hereinafter designates the Type or shape of a cross section, and cross section parameters [ a1= ], [ a2= ], [ a3= ], and [ a4= ] respectively represent parameters necessary to mathematically describe one figure above. According to the creation rule, the type or shape of each section in the section library is defined.
Step 2: and writing the mapping rule of the section library into the family type of the special-shaped linear family of the Revit model, and adding family parameters for the special-shaped linear family. According to the mapping rule of the section library, the parameter of the Revit family is added with a type note of (= b) (=) b1 (=) tw1 (=) h1 (=) and the like to confirm the "=" of the family parameter of each section information, and then the parameter name of the control section side length, arc length, 8230and 8230in the family is written.
And 3, step 3: and (4) screening a BIM linear model. Through API, a special-shaped linear model which is subjected to stretching change based on a reference line in the Revit model, such as a structural frame model (beam and support) and a wall model in the Revit model, a self-built 'line-based metric system conventional model' \8230;, which is always parallel to a baseline thereof, is screened out. Location is a location curve type, and is a linear model according to whether the value of element.
And 4, step 4: acquiring geometric surface information of the special-shaped linear model, comprising the following steps: model cross-section information and top-surface information. The method specifically comprises the following steps:
step 4.1: the baseline of the shaped linear member is obtained by the Location property of the linear member.
Step 4.2: based on the baseline, linear model cross-section information is automatically obtained. The plane of the linear model three-dimensional geometry intersecting the model baseline (the intersection in Revit is generally perpendicular to the baseline) is a linear model section. The method utilizes the value of the Geometryelement of the model Element provided by the Revit API, and the value records the three-dimensional geometric information of the model, and comprises the following steps: face and Edge constituting the Face; all the faces intersected with the baseline locationCurve are obtained, namely the geometric information of the cross section of the model is obtained.
Step 4.3: based on the baseline, top surface information of the linear model is automatically obtained. Acquiring a plane which is parallel to the base line locationCurve and the normal direction of the plane facing the outside of the model intersects with the direction (0, 1) to form an acute angle; and if the acquired surface is vertically projected to the horizontal plane to form a new graph, judging that the acquired surface is the top surface of the linear model.
The method utilizes the value of the Geometryelement of the model Element provided by the Revit API, and the value records the three-dimensional geometric information of the model, and comprises the following steps: face and Edge constituting the Face; normal to Face, supplied by Revit, is oriented outside the model, and is determined to be perpendicular to the direction of baseline locationcurre and forms an acute angle with the (0, 1) direction, namely, the Face is judged to be the top surface, and all the top surfaces are obtained, namely the geometric information of the model top surface is obtained.
And 5: and automatically identifying geometric parameter information of all surfaces of the special-shaped linear model to complete family identification, namely section mapping, and obtaining the corresponding finished model section geometric information. And matching the screened linear model into a built-in section library, and corresponding to the description parameters specified by the section of the shape in the section library of the device through the parameters for controlling the section shape in the special-shaped linear model family type. The method specifically comprises the following steps:
step 5.1: automatically acquiring the geometric surface information of the special-shaped linear model and inputting the geometric surface information into the section library,
here, the model information may be recorded in the section library by generating a section from the geometric surface information of the deformed linear model and automatically generating default parameters a1, a2, a3, a4, and the like for each side of the section.
Step 5.2: a section type is selected from the section library and corresponds to a family parameter of the family of heteromorphic linearity. And corresponding the group parameters for controlling the section shape in the group type to the section parameters of the shape in the section library to obtain the correspondingly finished model section geometric information.
For example, default parameters a1, a2, a3, a4, etc. in the cross-section library match parameters b, b1, tw1, h1, etc. in the family type annotation, so that the Revit family type parameter matches the parameters in the cross-section library, completing the family identification, i.e., cross-section mapping.
Step 6: and generating a drawing and automatically marking the drawing based on the corresponding finished geometric information of the section of the model. And transmitting profile sideline information to generate a profile of the model. And realizing the dimension marking of the section of the model according to the identified geometric parameters of the section of the model in the section library. And utilizing a linear dimension marking creation interface provided by BIM software to generate a component-to-axis positioning marking in the Revit software drawing. And then the Foreach cycle is used for one-key automatic dimensioning. The method specifically comprises the following steps:
step 6.1: and generating a profile diagram and automatically marking the section size based on the corresponding finished model section geometric information. Calling an API (application programming interface) for Revit drawing a detailed graph according to the automatically acquired geometric information of the cross section of the linear model, drawing a detailed graph, create, new DetailCurve, and introducing cross section side line information to draw a cross section of the model; and calling the dimension information in the group parameters according to the geometric information of the section of the correspondingly finished model, and carrying out one-key automatic dimension marking on the section by using the Foreach cycle.
Step 6.2: and generating a plane graph and automatically marking the size of the projection plane and the positioning relation with the axis based on the geometric information of the section of the correspondingly finished model.
Here, a plan view can be created according to the floor elevation in the Revit model, and the position of the side of the model projection plane is marked by using the corresponding finished model top surface geometric information; and calling a Revit API to create the distance from the projection plane edge to the axis, namely completing the marking of the positioning relation between the projection plane edge and the axis. And carrying out one-key automatic size marking by using a Foreach loop. Further, in the above-mentioned case,
in summary, the present invention can automatically identify the abnormal-shaped linear model in the BIM model, read the geometric information thereof, and generate the dimension labels of the cross-sectional view and the plan view and the label of the relationship with the axis network. Compared with the situation that drawing is omitted due to the fact that the existing BIM-based drawing product cannot identify the special-shaped component, the method can enable software to identify the special-shaped linear component with any section. Compared with a CAD manual drawing, the drawing automatic generation method has the advantages that the section and the plane drawing are automatically generated, the drawing accuracy is guaranteed, and the efficiency of workers is effectively improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components and steps of the various examples have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A method for automatically identifying and positioning a graph based on a Revit special-shaped linear structure is characterized by comprising the following steps:
step 1: creating a cross-section library of profiled linear members, the cross-section library comprising: type or shape of cross-section and cross-sectional parameters;
step 2: writing the mapping rule of the section library into the family type of the special-shaped linear family of the Revit model, and adding family parameters for the special-shaped linear family;
and step 3: screening out a special-shaped linear model which is subjected to stretching change based on a reference line in the Revit model through an API;
and 4, step 4: acquiring geometric surface information of the special-shaped linear model, comprising the following steps: model section information and top surface information;
and 5: automatically identifying geometric parameter information of all surfaces of the special-shaped linear model to complete family identification, namely section mapping, and obtaining correspondingly finished model section geometric information;
and 6: and generating a drawing and automatically marking the drawing based on the corresponding finished geometric information of the section of the model.
2. The method for automatically identifying and positioning a graph based on a Revit's heteromorphic linear construct of claim 1, wherein step 4: acquiring geometric surface information of the special-shaped linear model, comprising the following steps: model cross-section information and top surface information, including:
step 4.1: acquiring a baseline of the special-shaped linear member according to the Location attribute of the linear member;
and 4.2: automatically acquiring the section information of the linear model based on the baseline;
step 4.3: based on the baseline, top surface information of the linear model is automatically acquired.
3. The method for automatically identifying and positioning a graph based on a Revit's heteromorphic linear construct of claim 1, wherein the step 4.2: based on the baseline, automatically acquiring linear model section information, comprising:
and judging a plane intersecting with the model base line in the three-dimensional geometric figure of the linear model as a linear model section, and automatically acquiring the section information of the linear model based on the linear model section.
4. The method for automatically identifying and positioning a graph based on a Revit's heteromorphic linear construct of claim 1, wherein the step 4.3: based on the baseline, automatically acquiring top surface information of the linear model, comprising:
acquiring a plane which is parallel to the base line and the normal direction of the plane facing out of the model intersects with the direction (0, 1) to form an acute angle; if the acquired surface is vertically projected to a horizontal plane to form a new graph, judging that the acquired surface is the top surface of the linear model;
and acquiring linear model top surface information based on the linear model top surface.
5. The method for automatically identifying and positioning a graph based on a Revit's heteromorphic linear construct according to claim 1, wherein step 5: automatically identifying geometric parameter information of all surfaces of the special-shaped linear model to complete family identification, namely section mapping, and obtaining correspondingly finished model section geometric information, wherein the method comprises the following steps:
step 5.1: automatically acquiring geometric surface information of the special-shaped linear model and inputting the geometric surface information into the section library;
step 5.2: and corresponding the group parameters for controlling the section shape in the group type to the section parameters of the shape in the section library to obtain the corresponding finished model section geometric information.
6. The method for automatically identifying and positioning a graph based on a Revit's heteromorphic linear construct of claim 1, wherein step 6: generating a drawing and automatically marking based on the corresponding finished geometric information of the section of the model, comprising the following steps:
step 6.1: and generating a profile based on the corresponding finished geometric information of the section of the model, and automatically marking the dimension of the section.
7. The method for automatically identifying and positioning a graph based on a Revit's heteromorphic linear construct of claim 1, wherein step 6.1: generating a profile diagram and automatically marking the section size based on the corresponding finished model section geometric information, wherein the method comprises the following steps:
calling an API (application programming interface) for Revit to draw a detailed graph line according to the automatically acquired geometric information of the cross section of the linear model, drawing the detailed graph line, and introducing cross section sideline information to draw a cross section of the model; and calling the dimension information in the family parameters according to the geometric information of the section of the correspondingly finished model, and carrying out one-key automatic dimension marking on the section by using the Foreach cycle.
8. The method for automatically identifying and positioning a graph based on a Revit's heteromorphic linear construct of claim 1, wherein step 6: generating a drawing and automatically marking based on the correspondingly finished geometric information of the section of the model, wherein the method comprises the following steps:
step 6.2: and generating a plane graph and automatically marking the size of the projection plane and the positioning relation with the axis based on the corresponding finished geometric information of the section of the model.
9. The method for automatically identifying and positioning a graph based on a Revit's heteromorphic linear construct of claim 1, wherein step 6.2: based on the geometric information of the corresponding finished model section, generating a plane diagram and automatically marking the size of a projection surface and the positioning relation with an axis, comprising the following steps:
creating a plan view according to the floor elevation in the Revit model, and marking the position of the edge of the model projection plane by using the correspondingly finished geometric information of the model top surface; and calling a Revit API to create the distance from the projection plane edge to the axis.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116341061A (en) * | 2023-03-10 | 2023-06-27 | 北京建工四建工程建设有限公司 | Drawing generation method based on dynamo |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116341061A (en) * | 2023-03-10 | 2023-06-27 | 北京建工四建工程建设有限公司 | Drawing generation method based on dynamo |
| CN116341061B (en) * | 2023-03-10 | 2024-03-29 | 北京建工四建工程建设有限公司 | Drawing generation method based on dynamo |
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