CN109035412A - A kind of the virtual three-dimensional reconstruction and scene creation method of building - Google Patents
A kind of the virtual three-dimensional reconstruction and scene creation method of building Download PDFInfo
- Publication number
- CN109035412A CN109035412A CN201710433051.7A CN201710433051A CN109035412A CN 109035412 A CN109035412 A CN 109035412A CN 201710433051 A CN201710433051 A CN 201710433051A CN 109035412 A CN109035412 A CN 109035412A
- Authority
- CN
- China
- Prior art keywords
- virtual
- dimensional
- building
- scene
- wall
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating 3D models or images for computer graphics
- G06T19/006—Mixed reality
Abstract
The virtual three-dimensional that the present invention provides a kind of building is rebuild and scene creation method: reference entity building rebuilds the virtual three-dimensional model of building；The virtual scene of the virtual three-dimensional model is drawn in virtual environment；It is roamed in the virtual scene of three dimensional window, observe and adjusts virtual scene assembly effect；The export of specified format is carried out to the virtual scene of building virtual three-dimensional model.The present invention is directed to the discreteness and randomness of building, in conjunction with building method for reconstructing and scene creation method, can achieve accurate quickly three-dimensional reconstruction and scene creation effect.
Description
Technical field
The present invention relates to 3-D image fields, and in particular, to a kind of the virtual three-dimensional reconstruction and scene creation of building
Method.
Background technique
Building three-dimensional reconstruction be obtain building three-dimensional structure information important means, urban planning, disaster monitoring,
The fields such as communications facility construction and digital city have very extensive application.For a long time, it is always photogrammetric, distant
The important topic that the fields such as sense, computer vision, pattern-recognition and mapping study for a long period of time.It is representative in the world at present
Research institution have the Zurich polytechnical university of Switzerland, the Bonn University of Germany, the Oxford University of Britain, French national information with from
Dong Hua research institute and the University of Southern California in the U.S. etc..Domestic research institution mainly have Wuhan University, the Central China University of Science and Technology with
And remote sensing institute of the Chinese Academy of Sciences etc..Building three-dimensional reconstruction is increasingly becoming computer graphics, the research hotspot of computer vision.
Scene creation is the process that dummy object is added and is placed into the virtual scene for being used to make animation or game.
It is either had split into now in the fields such as game, animation, advertising or architectural design, scene creation and three-dimensional modeling
Two relatively independent stages, so being nowadays all based on an already present library of object in the industry carries out scene creation.
This field is mostly studied and achievement is all based on building under normal conditions with normal appearance, to rule
Building carry out region detection and reconstructing three-dimensional model.However, show irregular shape for building, discreteness and unordered
Property, and not predictability, so that directly carrying out mesh reconstruction with these data, it is difficult to find reasonable rule, it will generate
Huge error even results in three-dimensional reconstruction failure, has seriously affected the effect of three-dimensional reconstruction.And for scene creation, now
General to be manipulated using based on D mouse keyboard interface, this mode has a large amount of menu, mode, component needs to cut
It changes, this has fear sense for beginner, these technological deficiencies all restrict the technology development of this field.
Summary of the invention
The technological deficiency with scene creation is rebuild for building based on this field, the present invention provides a kind of buildings
Virtual three-dimensional is rebuild and scene creation method, in conjunction with building method for reconstructing and scene creation method, can achieve accurate quick
Three-dimensional reconstruction and scene creation effect.
A kind of the virtual three-dimensional reconstruction and scene creation method of building, characterized in that include:
Step 1, reference entity building rebuilds the virtual three-dimensional model of building；
Step 2, the virtual scene of the virtual three-dimensional model is drawn in virtual environment；
Step 3, it is roamed in the virtual scene of three dimensional window, observe and adjusts virtual scene assembly effect；
Step 4, the export of specified format is carried out to the virtual scene of building virtual three-dimensional model.
Preferably, the step 1, reference entity building rebuild the virtual three-dimensional model of building, comprising: by adopting
Sample obtains the discrete original point on entity building, original side and original face,
Preferably, the step 2 is drawn the virtual scene of the virtual three-dimensional model in virtual environment, is specifically included:
Step 2.1, it draws and adjusts virtual scene wall, generate three-dimensional wall in virtual environment in real time；
Step 2.2, floor needed for adding virtual scene；
Step 2.3, ceiling needed for adding virtual scene；
Step 2.4, furniture and ornaments needed for adding virtual scene.
Preferably, the step 2-1 draws and adjusts virtual scene wall, generates three-dimensional wall in virtual environment in real time
Wall specifically includes:
Step 2.1.1 draws scene wall sketch using single line tracing mode；
Step 2.1.2, selected wall vertex carry out dragging adjustment, change the wall locations in three-dimensional scenic；
Step 2.1.3 when drawing irregular curved walls, is adjusted by adjusting the straight line for corresponding to wall in scene
It is whole；
Step 2.1.4, when modifying the closure wall drawn, select command cooperation touch gestures are operated.
Preferably, the step 3 roams in the virtual scene of three dimensional window, observes and adjusts virtual scene dress
With effect, specifically include:
Step 3.1, roam mode is switched into；
Step 3.2, change the position of video camera in three-dimensional scenic；
Step 3.3, executed in three dimensional window up and down, the touch gestures that horizontally slip realize come back in three-dimensional scenic,
It bows and the simulation effect of rotary head.
By the invention it is possible to show discreteness and randomness for building, and not predictability, building is realized
The three-dimensional reconstruction and scene rebuilding of object accurately and fast.
Detailed description of the invention
Method flow diagram Fig. 1 proposed by the invention.
Specific embodiment
For a better understanding of the present invention, with reference to the description of the embodiment of the accompanying drawings, method of the invention is carried out
Further instruction.
In order to fully understand the present invention, numerous details are referred in the following detailed description.But art technology
Personnel are it should be understood that the present invention may not need these details and realize.In embodiment, it is not described in detail well known side
Method, process, component, in order to avoid unnecessarily make embodiment cumbersome.
Shown in Figure 1, a kind of virtual three-dimensional of building proposed by the invention is rebuild and scene creation method, special
Sign is, comprising:
Step 1, reference entity building rebuilds the virtual three-dimensional model of building；
Step 2, the virtual scene of the virtual three-dimensional model is drawn in virtual environment；
Step 3, it is roamed in the virtual scene of three dimensional window, observe and adjusts virtual scene assembly effect；
Step 4, the export of specified format is carried out to the virtual scene of building virtual three-dimensional model.
Preferably, the step 1, reference entity building rebuild the virtual three-dimensional model of building, comprising: by adopting
Sample obtains the discrete original point on entity building, original side and original face,
Preferably, the step 2 is drawn the virtual scene of the virtual three-dimensional model in virtual environment, is specifically included:
Step 2.1, it draws and adjusts virtual scene wall, generate three-dimensional wall in virtual environment in real time；
Step 2.2, floor needed for adding virtual scene；
Step 2.3, ceiling needed for adding virtual scene；
Step 2.4, furniture and ornaments needed for adding virtual scene.
Preferably, the step 2-1 draws and adjusts virtual scene wall, generates three-dimensional wall in virtual environment in real time
Wall specifically includes:
Step 2.1.1 draws scene wall sketch using single line tracing mode；
Step 2.1.2, selected wall vertex carry out dragging adjustment, change the wall locations in three-dimensional scenic；
Step 2.1.3 when drawing irregular curved walls, is adjusted by adjusting the straight line for corresponding to wall in scene
It is whole；
Step 2.1.4, when modifying the closure wall drawn, select command cooperation touch gestures are operated.
Preferably, the step 3 roams in the virtual scene of three dimensional window, observes and adjusts virtual scene dress
With effect, specifically include:
Step 3.1, roam mode is switched into；
Step 3.2, change the position of video camera in three-dimensional scenic；
Step 3.3, executed in three dimensional window up and down, the touch gestures that horizontally slip realize come back in three-dimensional scenic,
It bows and the simulation effect of rotary head.
Preferably, the step 1, reference entity building are rebuild the virtual three-dimensional model of building, are specifically included:
Step 1.1, the discrete original point of entity building, original side and original face are obtained；
Step 1.2, the tetrahedral grid and triangulated mesh of building are established；
Step 1.3, building data are obtained by tetrahedral grid and triangulated mesh, virtual three is carried out to building
Dimension module is rebuild.
Preferably, the step 1.2 establishes tetrahedral grid and triangulated mesh, specifically includes:
Step 1.2.1, chooses specified point from original point, chooses certain edges thereof from original side, chooses from original face special
Face is determined, to establish specific point set, certain edges thereof collection, certain surface collection；
Step 1.2.2 establishes initial tetrahedral mesh and initial triangulated mesh with specific point set；
Step 1.2.3 carries out certain edges thereof and segments iterative process；
Step 1.2.4 carries out certain surface and segments iterative process.
Preferably, the step 1.2.1 is established specific point set, certain edges thereof collection, certain surface collection meet and following constrain item
Part:
1.2.1.1, it is not overlapped between each specified point, between each certain edges thereof, between each certain surface；
1.2.1.2, if specified point is in certain edges thereof, specified point must be the endpoint of certain edges thereof；
1.2.1.3, if two certain edges thereofs have intersection point, intersection point must be the endpoint of certain edges thereof；
1.2.1.4, if certain edges thereof and certain surface intersection, intersection point must be the endpoint of certain edges thereof；
1.2.1.5, two certain surfaces only intersect at public certain edges thereof；
1.2.1.6, the endpoint of all certain edges thereofs is all specified point, and the boundary line of all certain surfaces is all certain edges thereof.
Preferably, the step 1.2.2 establishes initial tetrahedral mesh and initial triangulated mesh with specific point set, tool
Body includes:
Step 1.2.2.1 carries out the Tetrahedron subdivision of point set to specific point set, obtains an initial Tetrahedron subdivision net
Lattice.
Step 1.2.2.2 carries out the plane trigonometry of point set to all specified points fallen in certain surface in specific point set
Subdivision generates the initial triangulated mesh of each certain surface.
Preferably, the step 1.2.3 carries out certain edges thereof and segments iterative process, specifically includes:
Step 1.2.3.1 checks each certain edges thereof, if there is no skies in current Tetrahedron subdivision grid on the side
Circumsphere segments it from the M of midpoint, and point M is added in Tetrahedron subdivision grid as node；
Step 1.2.3.2, meanwhile, for each certain surface, if the midpoint M is fallen in certain surface, also by point M conduct
Node is added in the current triangulated mesh of the certain surface；Each certain surface has a triangulated mesh, and will be located at
Triangle within the boundary of certain surface is identified.
Step 1.2.3.3 executes step 1.2.3.1 and step 1.2.3.2, until all sides are in Tetrahedron subdivision grid
In the triangle that all occurs, and be identified can cover each corresponding certain surface, after obtaining certain edges thereof subdivision iteration
Tetrahedron subdivision grid and triangulated mesh.
Preferably, the step 1.2.4 carries out certain surface and segments iterative process, specifically includes:
Step 1.2.4.1 checks each triangle T in the triangulated mesh of each certain surface, if T is in tetrahedron
There is no empty great circle circumsphere in subdivision grid, the unfaithful intention P of T is calculated, sub-dividing operations of adding some points then are carried out；Wherein, described big
Circle circumsphere is will to be known as the great circle circumsphere of T using the circumscribed circle of triangle T as the ball of great circle:
Step 1.2.4.2 adds some points when operating, if P not in Tetrahedron subdivision grid any certain edges thereof be subdivided into it is small
In the diameter ball on side, it is added P as node in Tetrahedron subdivision grid and the triangulated mesh of certain surface；If P is at certain
In the diameter ball of small side AB, AB is segmented from midpoint M, and is added M point as node in Tetrahedron subdivision grid；Wherein, institute
State it is small while diameter ball i.e. using it is small while as the ball of diameter；
Step 1.2.4.3, meanwhile, for each certain surface, if M is fallen in certain surface, also point M is added as node
In the triangulated mesh of the certain surface；
Step 1.2.4.4, after completing an operation of adding some points, with the step 2.3 when subdivision alternative manner carries out
Iteration subdivision, guarantees that all certain edges thereofs occur in Tetrahedron subdivision grid；
Step 1.2.4.5 judges whether that each triangle in the triangulated mesh of each certain surface is cutd open in tetrahedron
All exist in subnetting lattice, if yes then enter step 1.2.4.6；If not, judging the not triangle in Tetrahedron subdivision grid
Whether the size of shape is less than preset size threshold, does not subdivide iteration if it is and enters step 1.2.4.6, repeats if not
Execute step 1.2.4.2-1.2.4.5.
Step 1.2.4.6, iteration terminate, and obtain the final Tetrahedron subdivision grid and three that iteration is segmented by certain surface
Angle subdivision grid.
As it can be seen that overcoming this field the present invention provides a kind of reconstruction of the virtual three-dimensional of building and scene creation method
Technological deficiency realize irregular, the unexpected building of rule accurate virtual three-dimensional and rebuild and and conveniently
Scene creation.
Here the preferred embodiment of the present invention is only illustrated, but its meaning is not intended to limit the scope of the invention, applicability and is matched
It sets.On the contrary, detailed explanation of the embodiments can be implemented by those skilled in the art.It will be understood that without departing from appended power
In the case of the spirit and scope of the invention that sharp claim determines, changes and modifications may be made to details.
Claims (5)
1. a kind of virtual three-dimensional of building is rebuild and scene creation method, characterized in that include:
Step 1, reference entity building rebuilds the virtual three-dimensional model of building；
Step 2, the virtual scene of the virtual three-dimensional model is drawn in virtual environment；
Step 3, it is roamed in the virtual scene of three dimensional window, observe and adjusts virtual scene assembly effect；
Step 4, the export of specified format is carried out to the virtual scene of building virtual three-dimensional model.
2. according to the method described in claim 1, wherein, the step 1, reference entity building rebuilds the virtual of building
Threedimensional model, comprising: by sampling, obtain the discrete original point on entity building, original side and original face.
3. according to the method described in claim 1, wherein, the step 2 draws the virtual three-dimensional model in virtual environment
Virtual scene, specifically include:
Step 2.1, it draws and adjusts virtual scene wall, generate three-dimensional wall in virtual environment in real time；
Step 2.2, floor needed for adding virtual scene；
Step 2.3, ceiling needed for adding virtual scene；
Step 2.4, furniture and ornaments needed for adding virtual scene.
4. according to the method described in claim 3, wherein, the step 2.1 is drawn and is adjusted virtual scene wall, exists in real time
Three-dimensional wall is generated in virtual environment, is specifically included:
Step 2.1.1 draws scene wall sketch using single line tracing mode；
Step 2.1.2, selected wall vertex carry out dragging adjustment, change the wall locations in three-dimensional scenic；
Step 2.1.3 when drawing irregular curved walls, is adjusted by adjusting the straight line for corresponding to wall in scene；
Step 2.1.4, when modifying the closure wall drawn, select command cooperation touch gestures are operated.
5. according to the method described in claim 1, wherein, the step 3 roams in the virtual scene of three dimensional window,
Virtual scene assembly effect is observed and is adjusted, is specifically included:
Step 3.1, roam mode is switched into；
Step 3.2, change the position of video camera in three-dimensional scenic；
Step 3.3, touch gestures realization that is upper and lower, horizontally slipping is executed in three dimensional window to come back, bow in three-dimensional scenic
And the simulation effect of rotary head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710433051.7A CN109035412A (en) | 2017-06-09 | 2017-06-09 | A kind of the virtual three-dimensional reconstruction and scene creation method of building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710433051.7A CN109035412A (en) | 2017-06-09 | 2017-06-09 | A kind of the virtual three-dimensional reconstruction and scene creation method of building |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109035412A true CN109035412A (en) | 2018-12-18 |
Family
ID=64629780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710433051.7A Pending CN109035412A (en) | 2017-06-09 | 2017-06-09 | A kind of the virtual three-dimensional reconstruction and scene creation method of building |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109035412A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113256802A (en) * | 2021-06-17 | 2021-08-13 | 中山大学 | Virtual three-dimensional reconstruction and scene creation method for building |
-
2017
- 2017-06-09 CN CN201710433051.7A patent/CN109035412A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113256802A (en) * | 2021-06-17 | 2021-08-13 | 中山大学 | Virtual three-dimensional reconstruction and scene creation method for building |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8291345B2 (en) | Sun-shadow simulation in a geospatial system | |
| CN103646423B (en) | A kind of method of three-dimensional geological modeling and device | |
| CN102609982B (en) | Topology discovery method of space geological data based on unstructured mode | |
| CN103942053A (en) | Three-dimensional model gesture touch browsing interaction method based on mobile terminal | |
| CN106355640A (en) | Ground-underground three-dimensional integrated space processing method and system | |
| CN105630378B (en) | Three-dimensional virtual scene design assembly system and method based on dual touch screen | |
| CN109016491A (en) | A kind of house 3D modeling and 3D printing method | |
| Yang et al. | Semantic decomposition and recognition of indoor spaces with structural constraints for 3D indoor modelling | |
| CN111915726A (en) | Construction method of three-dimensional scene of overhead transmission line | |
| CN105225272A (en) | A kind of tri-dimensional entity modelling method based on the reconstruct of many outline lines triangulation network | |
| CN110349262B (en) | BIM-based three-dimensional modeling method and system for advanced geological prediction of tunnel | |
| CN103793552A (en) | Real-time dynamic generating method for local particle spring model with deformed soft tissues | |
| Petrasova et al. | GIS-based environmental modeling with tangible interaction and dynamic visualization | |
| Horna et al. | Building 3D indoor scenes topology from 2D architectural plans | |
| Isshiki et al. | 3D tsunami run-up simulation and visualization using particle method with GIS-based geography model | |
| CN109035412A (en) | A kind of the virtual three-dimensional reconstruction and scene creation method of building | |
| Zmugg et al. | Procedural architecture using deformation-aware split grammars | |
| CN109215124A (en) | The construction method of underground engineering 3D grid model under a kind of complex geological condition | |
| Hu et al. | Batch modeling of 3d city based on esri cityengine | |
| CN105740588B (en) | Water damage for more tunnel any angles coupling under mine is stretched method | |
| CN109472046A (en) | Complicated dam foundation arch dam three-dimensional finite element tetrahedral grid automatic division method | |
| CN112184894A (en) | Sculpture method, device and equipment for three-dimensional modeling and storage medium | |
| CN109035321A (en) | A kind of volume estimation method of building | |
| Xing et al. | Rotbav: A toolkit for constructing mixed reality apps with real-time roaming in large indoor physical spaces | |
| CN112150628A (en) | Method for building three-dimensional data model in GIS platform by BIM data |
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 |