CN113217106B - Three-dimensional modeling method for inclined type tunnel portal - Google Patents
Three-dimensional modeling method for inclined type tunnel portal Download PDFInfo
- Publication number
- CN113217106B CN113217106B CN202110591356.7A CN202110591356A CN113217106B CN 113217106 B CN113217106 B CN 113217106B CN 202110591356 A CN202110591356 A CN 202110591356A CN 113217106 B CN113217106 B CN 113217106B
- Authority
- CN
- China
- Prior art keywords
- contour line
- cap peak
- lower contour
- portal
- die
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000009466 transformation Effects 0.000 claims description 12
- 230000001131 transforming effect Effects 0.000 claims description 10
- 230000007306 turnover Effects 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/05—Geographic models
Abstract
The invention relates to the field of three-dimensional modeling, and provides a three-dimensional modeling method of a beveling tunnel portal, which comprises the following steps of: step 1, creating a portal model of a portal segment; step 2, obtaining modeling parameters of the inclined type portal; step 3, obtaining a lower contour line of the cap peak inner mold and a lower contour line of the cap peak outer mold according to modeling parameters and a cavity model of the cavity door section; step 4, acquiring an upper contour line of the cap peak inner die and an upper contour line of the cap peak outer die according to the lower contour line of the cap peak inner die, the lower contour line of the cap peak outer die and modeling parameters; and 5, entity stitching. The three-dimensional modeling is performed by adopting the steps without performing the turnover operation, so that the precision is higher and the efficiency is better.
Description
Technical Field
The invention relates to the field of three-dimensional modeling, in particular to a three-dimensional modeling method of a bevelled tunnel portal.
Background
With the deep application and development of BIM technology in the field of infrastructure, how to effectively improve the efficiency and precision of three-dimensional modeling is becoming more and more important. The micro of Bentley company is a powerful three-dimensional modeling software capable of serving the civil construction industry, but because the self parameterization function of Bentley series software is weak, BIM modeling staff can only model through a traditional mode of turning over the model, namely, three-dimensional reconstruction is performed by utilizing a two-dimensional drawing, and the model has low repeated use rate, troublesome modification, low efficiency and low precision. The inclined cutting tunnel portal mainly comprises a cap peak and a tunnel body, wherein the cap peak is an elliptical table formed by four elliptical curves (a lower contour line of an inner die of the cap peak, a lower contour line of an outer die of the cap peak, an upper contour line of an inner die of the cap peak and an upper contour line of the outer die of the cap peak).
Disclosure of Invention
In order to improve the modeling efficiency and the modeling precision of the inclined type tunnel portal, the invention provides a three-dimensional modeling method of the inclined type tunnel portal.
The invention solves the problems by adopting the following technical scheme:
a three-dimensional modeling method of a chamfer type tunnel portal, comprising:
step 1, creating a portal model of a portal segment;
step 2, obtaining modeling parameters of the inclined type portal;
step 3, obtaining a lower contour line of the cap peak inner mold and a lower contour line of the cap peak outer mold according to modeling parameters and a cavity model of the cavity door section;
step 4, acquiring an upper contour line of the cap peak inner die and an upper contour line of the cap peak outer die according to the lower contour line of the cap peak inner die, the lower contour line of the cap peak outer die and modeling parameters;
and 5, entity stitching.
Further, the modeling parameters in the step 2 comprise slope parameters of an upper contour line of the cap peak inner mold, slope parameters of an upper contour line of the cap peak outer mold, slope parameters of a lower contour line of the cap peak inner mold, slope parameters of a lower contour line of the cap peak outer mold and base points of the inclined type tunnel portal.
Further, the step 3 includes:
step B1, translating and transforming the base point of the inclined type tunnel portal according to the slope parameter of the lower contour line of the cap peak inner die to obtain the plane where the lower contour line of the cap peak inner die is located, and translating and transforming the base point of the inclined type tunnel portal according to the slope parameter of the lower contour line of the cap peak outer die to obtain the plane where the lower contour line of the cap peak outer die is located;
and B2, based on Boolean operation, intercepting a cavity model of the cavity section by using a plane where the lower contour line of the cap peak inner die is located and a plane where the lower contour line of the cap peak outer die is located so as to obtain the lower contour line of the cap peak inner die and the lower contour line of the cap peak outer die.
Further, the step 3 includes:
step B1, translating and transforming the base point of the inclined type tunnel portal according to the slope parameter of the lower contour line of the cap peak inner die to obtain the plane where the lower contour line of the cap peak inner die is located, and translating and transforming the base point of the inclined type tunnel portal according to the slope parameter of the lower contour line of the cap peak outer die to obtain the plane where the lower contour line of the cap peak outer die is located;
step B2, stretching the plane where the lower contour line of the cap peak inner die is located and the plane where the lower contour line of the cap peak outer die is located into a cube entity along the corresponding normal direction;
and B3, based on Boolean operation, respectively using a cube entity to intercept the cavity model of the cavity door section to obtain the lower contour line of the cap peak inner mold and the lower contour line of the cap peak outer mold.
Further, the step 4 includes:
step C1, stretching the lower contour line of the cap peak inner die and the lower contour line of the cap peak outer die along the tangential direction of the lower contour line of the cap peak inner die and the lower contour line of the cap peak outer die respectively to obtain two stretching curved surfaces x and y;
and C2, intercepting x according to an inclined plane corresponding to the slope parameter of the upper contour line of the cap peak inner mold to obtain the upper contour line of the cap peak inner mold, and intercepting y according to an inclined plane corresponding to the slope parameter of the upper contour line of the cap peak outer mold to obtain the upper contour line of the cap peak outer mold.
Further, the step B1 is preceded by a step A1 of translating the portal section model to the origin.
Further, the step A1 further comprises the step of performing thumbnail transformation on the portal section and the portal body model.
Further, step 4 further comprises a step D of restoring and transforming the cavity model of the cavity door section after the contour line on the inner die of the cap peak and the contour line on the outer die of the cap peak are obtained.
Further, the thumbnail transformation and the restore transformation are performed by a Transform function.
Compared with the prior art, the invention has the following beneficial effects: when the beveling tunnel portal modeling is carried out, a three-dimensional tunnel portal section tunnel body model is directly built, the lower contour line of the cap peak inner mold and the lower contour line of the cap peak outer mold required for building the cap peak are directly obtained through Boolean calculation of the face where relevant parameters are located or the formed cube and the tunnel portal section tunnel body model, the upper contour line of the cap peak inner mold and the upper contour line of the cap peak outer mold required for building the cap peak are obtained through the lower contour line of the cap peak inner mold and the lower contour line of the cap peak outer mold, so that modeling precision is improved, a turnover step is not needed, and modeling efficiency is improved.
Drawings
FIG. 1 is a flow chart of the three-dimensional modeling of the present invention;
FIG. 2 is a schematic view of a beveled tunnel portal;
FIG. 3 is a schematic view of the structure of the section of the cavity body model of the cavity door section and the plane where the lower contour line of the cap peak inner mold is located;
reference numerals: 1. the lower contour line of the cap peak inner mold, 2, the upper contour line of the cap peak inner mold, 3, the upper contour line of the cap peak outer mold, 4, the lower contour line of the cap peak outer mold.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in figure 2, the inclined type tunnel portal mainly comprises a cap peak and a tunnel body, wherein the cap peak mainly comprises an upper contour line of an inner cap peak, an upper contour line of an outer cap peak, a lower contour line of the inner cap peak and a lower contour line of the outer cap peak.
As shown in fig. 1, a three-dimensional modeling method of a chamfer type tunnel portal includes:
step 1, creating a portal model of a portal segment;
step 2, obtaining modeling parameters of the inclined type portal;
step 3, obtaining a lower contour line of the cap peak inner mold and a lower contour line of the cap peak outer mold according to modeling parameters and a cavity model of the cavity door section;
step 4, acquiring an upper contour line of the cap peak inner die and an upper contour line of the cap peak outer die according to the lower contour line of the cap peak inner die, the lower contour line of the cap peak outer die and modeling parameters;
and 5, entity stitching.
Specifically, step 1, creating a portal section portal body model: in this embodiment, a portal section body model is created using the C# language based on Visual Studio: loading and creating a portal command stream through an mdl command, selecting a line and a portal model from a dgn file, acquiring line positions and portal parameters of a portal section model, storing data in a beveled portal parameter class, and creating a portal section model according to the beveled portal parameter class; the line contains information such as mileage, elevation, space locating point and the like of the tunnel body.
Step 2, obtaining modeling parameters of the inclined type portal: modeling parameters of the inclined type tunnel portal are input through a parameter dialog box, wherein the modeling parameters comprise slope parameters of an upper contour line of the cap peak inner mold, slope parameters of an upper contour line of the cap peak outer mold, slope parameters of a lower contour line of the cap peak inner mold, slope parameters of a lower contour line of the cap peak outer mold and base points of the inclined type tunnel portal.
Step 3, obtaining a lower contour line of the cap peak inner die and a lower contour line of the cap peak outer die according to modeling parameters and a cavity section cavity model: the invention provides two modes for acquiring the lower contour line of the inner hat brim die and the lower contour line of the outer hat brim die, wherein one mode is that a surface is intersected with a body, and the other mode is that the surface is intersected with the body.
The surface is intersected with the body: as shown in fig. 3, the lower contour line of the visor inner mold is taken as an example. And carrying out coordinate translation transformation on the base points of the inclined cutting type tunnel portal to obtain p1, p2, p3, p4, p5 and p6, wherein the line segments p1p2// p3p6// p4p 5. p1p2 is a horizontal line on a plane of a hole in the hole model of the hole section, the distance between the lower contour line of the cap peak inner mold and the hole can be determined according to the base point of the inclined cutting type hole, so that p3p6, p3 and p6 are two endpoints of the lower contour line of the cap peak inner mold, p4p5 can be obtained according to the slope parameters of the lower contour line of the cap peak inner mold, and the plane of the lower contour line of the cap peak inner mold can be determined according to p3, p4, p5 and p 6; the plane where the lower contour line of the cap peak inner mold is located is used for being cut off with the cavity model of the cavity door section based on Boolean operation, and the corresponding cut-off line is the lower contour line of the cap peak inner mold. The lower contour line of the cap peak outer mold is obtained in the same way as the lower contour line of the cap peak inner mold.
The body is intersected with the body: obtaining a plane where a lower contour line of the cap peak inner mold is positioned in a mode of being in phase-section with the plane, and stretching the plane into a cube entity along the normal direction of the plane; based on Boolean operation, a cube entity is used for intercepting a cavity model of the cavity section so as to obtain a lower contour line of the cap peak inner mold. The lower contour line of the cap peak outer mold is obtained in the same way as the lower contour line of the cap peak inner mold. The Boolean operation efficiency is higher when the body and the body are adopted.
After Boolean operation, all contour lines of the sheared tunnel portal model can be respectively numbered through a numbering tool; and acquiring corresponding contour lines according to the numbers so as to ensure that each extracted contour line is a required specific contour line.
Step 4, acquiring an upper contour line of the cap peak inner die and an upper contour line of the cap peak outer die according to the lower contour line of the cap peak inner die, the lower contour line of the cap peak outer die and modeling parameters: stretching the lower contour line of the cap peak inner die and the lower contour line of the cap peak outer die along the tangential direction of the lower contour line of the cap peak inner die and the lower contour line of the cap peak outer die respectively to obtain two stretching curved surfaces x and y; and intercepting x according to an inclined plane corresponding to the slope parameter of the upper contour line of the cap peak inner mold to obtain the upper contour line of the cap peak inner mold, and intercepting y according to an inclined plane corresponding to the slope parameter of the upper contour line of the cap peak outer mold to obtain the upper contour line of the cap peak outer mold.
And 5, physically stitching, namely stitching each contour line into a solid model. Firstly, generating a curved surface by the curve, and then, generating a solid model by stitching the curved surface. Further, additional procedures and material properties can be added to the solid model, the volume, area and other properties of the solid model can be extracted, and statistics can be carried out according to procedures and material classification.
In addition, during use, the inventor finds that Boolean operation of the Microstation software is limited to be within a range of +/-500 m, and random errors can occur in Boolean operation exceeding the range of +/-500 m. In order to solve this problem, a solution is proposed: and (3) performing translation transformation on the entity performing Boolean operation in the step (3) through a transformation function, and translating the entity to an origin. If the model range is still more than +/-500 m, the thumbnail transformation is carried out, and after the Boolean operation is completed, the transformation function is used for carrying out the reduction transformation.
Claims (4)
1. A method of three-dimensional modeling of a chamfered tunnel portal, comprising:
step 1, creating a portal model of a portal segment;
step 2, obtaining modeling parameters of the inclined type portal; the modeling parameters comprise slope parameters of an upper contour line of the cap peak inner mold, slope parameters of an upper contour line of the cap peak outer mold, slope parameters of a lower contour line of the cap peak inner mold, slope parameters of a lower contour line of the cap peak outer mold and base points of the inclined type tunnel portal;
step 3, obtaining a lower contour line of the cap peak inner mold and a lower contour line of the cap peak outer mold according to modeling parameters and a cavity model of the cavity door section; the method comprises the following steps:
a1, translating a portal section portal body model to an original point and performing thumbnail transformation on the portal section portal body model;
step B1, translating and transforming the base point of the inclined type tunnel portal according to the slope parameter of the lower contour line of the cap peak inner die to obtain the plane where the lower contour line of the cap peak inner die is located, and translating and transforming the base point of the inclined type tunnel portal according to the slope parameter of the lower contour line of the cap peak outer die to obtain the plane where the lower contour line of the cap peak outer die is located;
step B2, based on Boolean operation, intercepting a cavity model of a cavity door section by using a plane where a lower contour line of the cap peak inner die is located and a plane where a lower contour line of the cap peak outer die is located respectively so as to obtain the lower contour line of the cap peak inner die and the lower contour line of the cap peak outer die;
step 4, acquiring an upper contour line of the cap peak inner die and an upper contour line of the cap peak outer die according to the lower contour line of the cap peak inner die, the lower contour line of the cap peak outer die and modeling parameters; the method comprises the following steps:
step C1, stretching the lower contour line of the cap peak inner die and the lower contour line of the cap peak outer die along the tangential direction of the lower contour line of the cap peak inner die and the lower contour line of the cap peak outer die respectively to obtain two stretching curved surfaces x and y;
step C2, intercepting x according to an inclined plane corresponding to the slope parameter of the upper contour line of the cap peak inner mold to obtain the upper contour line of the cap peak inner mold, and intercepting y according to an inclined plane corresponding to the slope parameter of the upper contour line of the cap peak outer mold to obtain the upper contour line of the cap peak outer mold;
and 5, entity stitching.
2. A method of three-dimensional modeling of a chamfered tunnel portal as defined in claim 1 wherein step 3 comprises:
step B1, translating and transforming the base point of the inclined type tunnel portal according to the slope parameter of the lower contour line of the cap peak inner die to obtain the plane where the lower contour line of the cap peak inner die is located, and translating and transforming the base point of the inclined type tunnel portal according to the slope parameter of the lower contour line of the cap peak outer die to obtain the plane where the lower contour line of the cap peak outer die is located;
step B2, stretching the plane where the lower contour line of the cap peak inner die is located and the plane where the lower contour line of the cap peak outer die is located into a cube entity along the corresponding normal direction;
and B3, based on Boolean operation, respectively using a cube entity to intercept the cavity model of the cavity door section to obtain the lower contour line of the cap peak inner mold and the lower contour line of the cap peak outer mold.
3. The three-dimensional modeling method for the inclined tunnel portal according to claim 1, wherein the step 4 further comprises a step D of restoring and transforming the portal section portal body model after the upper contour line of the cap peak inner mold and the upper contour line of the cap peak outer mold are obtained.
4. A method of three-dimensional modeling a chamfered tunnel portal in accordance with claim 3 wherein the thumbnail transformation and the restore transformation are performed by a Transform function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110591356.7A CN113217106B (en) | 2021-05-28 | 2021-05-28 | Three-dimensional modeling method for inclined type tunnel portal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110591356.7A CN113217106B (en) | 2021-05-28 | 2021-05-28 | Three-dimensional modeling method for inclined type tunnel portal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113217106A CN113217106A (en) | 2021-08-06 |
| CN113217106B true CN113217106B (en) | 2024-01-12 |
Family
ID=77099077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110591356.7A Active CN113217106B (en) | 2021-05-28 | 2021-05-28 | Three-dimensional modeling method for inclined type tunnel portal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113217106B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002259473A (en) * | 2001-02-28 | 2002-09-13 | Sanritsu Kogyo Kk | Delivery system for basic data necessary for modeling of three-dimensional solid model |
| CN101182773A (en) * | 2007-12-20 | 2008-05-21 | 中铁十二局集团有限公司 | Railway large-bore tunnel oval-shaped table-board cap brim bias-cutting type hole-door construction method |
| CN101882171A (en) * | 2010-05-21 | 2010-11-10 | 中交第二公路勘察设计研究院有限公司 | Method for fast establishing interactive tunnel and wall rock body three-dimensional models |
| CN105593637A (en) * | 2013-10-02 | 2016-05-18 | 松下知识产权经营株式会社 | Dimension measurement device, dimension measurement method, dimension measurement system, and program |
| CN108108566A (en) * | 2018-01-02 | 2018-06-01 | 河南省交通规划设计研究院股份有限公司 | Vcehicular tunnel design method based on BIM |
| CN109538237A (en) * | 2019-01-23 | 2019-03-29 | 河南省交通规划设计研究院股份有限公司 | A kind of vcehicular tunnel design method based on OBM |
| CN112006711A (en) * | 2019-05-31 | 2020-12-01 | 通用电气精准医疗有限责任公司 | 3D perspective indicator and generation method and application thereof |
| CN112231801A (en) * | 2020-09-25 | 2021-01-15 | 深圳市华阳国际工程设计股份有限公司 | BIM-based hole protection generation method and device and computer storage medium |
| CN112525092A (en) * | 2018-09-19 | 2021-03-19 | 成都理工大学 | Tunnel construction monitoring system |
| CN112560154A (en) * | 2020-12-23 | 2021-03-26 | 中交第二公路勘察设计研究院有限公司 | Highway tunnel engineering BIM model dynamic creation method based on Unity platform |
-
2021
- 2021-05-28 CN CN202110591356.7A patent/CN113217106B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002259473A (en) * | 2001-02-28 | 2002-09-13 | Sanritsu Kogyo Kk | Delivery system for basic data necessary for modeling of three-dimensional solid model |
| CN101182773A (en) * | 2007-12-20 | 2008-05-21 | 中铁十二局集团有限公司 | Railway large-bore tunnel oval-shaped table-board cap brim bias-cutting type hole-door construction method |
| CN101882171A (en) * | 2010-05-21 | 2010-11-10 | 中交第二公路勘察设计研究院有限公司 | Method for fast establishing interactive tunnel and wall rock body three-dimensional models |
| CN105593637A (en) * | 2013-10-02 | 2016-05-18 | 松下知识产权经营株式会社 | Dimension measurement device, dimension measurement method, dimension measurement system, and program |
| CN108108566A (en) * | 2018-01-02 | 2018-06-01 | 河南省交通规划设计研究院股份有限公司 | Vcehicular tunnel design method based on BIM |
| CN112525092A (en) * | 2018-09-19 | 2021-03-19 | 成都理工大学 | Tunnel construction monitoring system |
| CN109538237A (en) * | 2019-01-23 | 2019-03-29 | 河南省交通规划设计研究院股份有限公司 | A kind of vcehicular tunnel design method based on OBM |
| CN112006711A (en) * | 2019-05-31 | 2020-12-01 | 通用电气精准医疗有限责任公司 | 3D perspective indicator and generation method and application thereof |
| CN112231801A (en) * | 2020-09-25 | 2021-01-15 | 深圳市华阳国际工程设计股份有限公司 | BIM-based hole protection generation method and device and computer storage medium |
| CN112560154A (en) * | 2020-12-23 | 2021-03-26 | 中交第二公路勘察设计研究院有限公司 | Highway tunnel engineering BIM model dynamic creation method based on Unity platform |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113217106A (en) | 2021-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7613539B2 (en) | System and method for mesh and body hybrid modeling using 3D scan data | |
| CN101308583B (en) | Curved surface body line boundary model rebuilding method based on three-views and apparatus thereof | |
| CN104217460B (en) | The compression & decompression of 3D modeling object | |
| CN110111410B (en) | Two-three-dimensional pipe network data organization and display method based on spatial database | |
| CN104346769A (en) | Lossless compression of a 3D mesh including transforming of the mesh to an image | |
| CN105426628B (en) | A kind of complex product isomery Model Fusion method | |
| CN112926207B (en) | Method and system for automatically constructing editable model of equal-geometry topological optimization result | |
| CN102436217B (en) | Method for reconstructing web processing drive geometry of slot characteristic of aircraft structure | |
| CN106814699B (en) | A kind of five axis increasing material geometric simulation method | |
| CN110675508A (en) | BIM model geometric figure simplification method | |
| CN103279603A (en) | Modeling method for showing machining process of part | |
| KR20030073424A (en) | A rendering system, rendering method, and recording medium therefor | |
| CN112348953A (en) | Railway BIM model processing method crossing geographical zoning | |
| US20080126307A1 (en) | Method for recognizing feature of 3D solid model | |
| CN110795835A (en) | Three-dimensional process model reverse generation method based on automatic synchronous modeling | |
| CN114398691B (en) | Intelligent design method and equipment for two-dimensional view of tire mold | |
| CN110782522A (en) | Foundation pit support project profile plotting method based on BIM | |
| CN104392489B (en) | Take the line vanishing method of the three-dimensional geographic space entity group of topology into account | |
| CN113217106B (en) | Three-dimensional modeling method for inclined type tunnel portal | |
| CN108932387A (en) | A method of gate is simulated based on feed path in real time | |
| CN115047825A (en) | Method for displaying numerical control machining milling in real time | |
| CN105320802A (en) | Auto CAD general graphical object based method for implementing aided planning and design | |
| CN108763767B (en) | VR engine-oriented large-data-volume IGS industrial model POLYGON conversion method | |
| CN111179420B (en) | Three-dimensional city model optimization method and system | |
| KR101530895B1 (en) | Methods for extracting object data for 2d cad from 3d cad and vice versa |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |