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CN113112602A - Building exhibition method based on desktop true three-dimensional display - Google Patents

Building exhibition method based on desktop true three-dimensional display Download PDF

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Publication number
CN113112602A
CN113112602A CN202110368554.7A CN202110368554A CN113112602A CN 113112602 A CN113112602 A CN 113112602A CN 202110368554 A CN202110368554 A CN 202110368554A CN 113112602 A CN113112602 A CN 113112602A
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virtual
building
scene
true
dimensional
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刘浩
曾超
贾利红
魏爽
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Sichuan Hongwei Technology Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/10Constructive solid geometry [CSG] using solid primitives, e.g. cylinders, cubes
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/011Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0481Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
    • G06F3/04815Interaction with a metaphor-based environment or interaction object displayed as three-dimensional, e.g. changing the user viewpoint with respect to the environment or object
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/30Image reproducers
    • H04N13/363Image reproducers using image projection screens

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  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
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Abstract

The invention discloses a floor display method based on desktop true three-dimensional display, which comprises the steps of firstly creating a virtual floor scene, adding a virtual reality interaction module into the scene, then placing a virtual camera matrix to collect light field information of the floor virtual scene and further generate colorful true three-dimensional data information of the virtual floor scene, finally transmitting the true three-dimensional data information of the virtual floor to a desktop true three-dimensional display system, and carrying out true three-dimensional display on the floor virtual scene by a high-speed projector module of the desktop true three-dimensional display system. The method can effectively overcome the defects that the traditional building exhibition is poor in experience, consumes manpower and material resources, is very inconvenient in exhibition means, large in site limitation, insufficient in interactivity and the like, and is an exhibition method capable of completely simulating the building scene and bringing the user with the experience of being personally on the scene.

Description

Building exhibition method based on desktop true three-dimensional display
Technical Field
The invention relates to the technical field of desktop true three-dimensional display, in particular to a building display method based on desktop true three-dimensional display.
Background
With the progress of society, the building and market industry has been met with rapid development, but while rapid development, its building show technique has not obtained effectual renewal and iteration, traditional building show technique mainly demonstrates through the form of sand table model, not only the show form is static show, no interactivity, the experience is very low, and the preparation of sand table model can consume a large amount of manpower and material resources, the show means is very inconvenient simultaneously, the place restriction is big, the limitation is high, dull in the aspect of building introduction simultaneously, it is difficult for the user to leave the impression deeply.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a building display method based on desktop true three-dimensional display. The method can effectively overcome the defects that the traditional building exhibition is poor in experience, consumes manpower and material resources, is very inconvenient in exhibition means, is large in site limitation, is insufficient in interactivity and the like. The method is a display method which can completely simulate the building scene and bring the experience of being personally on the scene to the user.
In order to achieve the technical effects, the invention provides the following technical scheme:
a method for displaying a building based on desktop true three-dimensional display comprises the following steps:
a. creating a virtual building scene in a virtual reality 3D engine;
b. adding a virtual reality interaction module into a virtual building scene;
c. placing a virtual camera matrix to acquire light field information of the virtual scene of the building;
d. generating color true three-dimensional data information of a virtual building scene;
e. and the high-speed projector module of the desktop true three-dimensional display system performs true three-dimensional display on the color true three-dimensional data information.
The method comprises the following steps that a, a three-dimensional drawing software and a virtual reality 3D engine are used for building a completely simulated building scene, and the simulated building scene mainly comprises three module components: the system comprises a building periphery component, a building appearance component and a sample house component; and storing the building related three-dimensional model manufactured by the three-dimensional drawing software into an FBX file format, importing the building related three-dimensional model into a virtual reality 3D engine, and directly calling a Game display window in the engine to construct a building scene virtual module.
The further technical scheme is that the dimension drawing software is Maya or 3Dmax, and the virtual reality 3D engine is Unity3D or UE 4.
The further technical scheme is that the virtual reality interaction module in the step b is composed of three module components: the system comprises a voice interaction component, a character interaction component and a model interaction component.
A plurality of virtual camera view acquisition systems distributed based on a sphere are adopted for acquisition in the step c, a plurality of virtual cameras are placed on the system on the outward circumference by taking the building scene as the circle center to form a camera matrix, and each virtual camera shoots the view in the respective view angle direction.
The method comprises the following steps that a, a step d is specifically to substitute all image pixel points acquired by a virtual camera into the following formula for calculation to obtain the color three-dimensional data information of the virtual building scene:
Figure BDA0003008335870000021
the shooting radius of the virtual camera, the shooting height of the virtual camera, the horizontal shooting field angle of the virtual camera, the vertical shooting field angle of the virtual camera, the number of pixel points in the vertical direction and the number of pixel points in the horizontal direction are included.
The further technical scheme is that in the step e, the high-speed projector in the desktop true three-dimensional display system specifically comprises three DMD chips, the DMD core control module controls the three DMD chips to respectively correspond to R, G, B three information images of the virtual building scene, LED light sources with three colors of RGB are used for independently illuminating each DMD chip, and color true three-dimensional display of the virtual building scene is achieved through the color combination prism.
Compared with the prior art, the invention has the following beneficial effects: the method can effectively overcome the defects that the traditional building exhibition is poor in experience, consumes manpower and material resources, is very inconvenient in exhibition means, large in site limitation, insufficient in interactivity and the like, and is an exhibition method capable of completely simulating the building scene and bringing the experience of being personally on the scene to users.
Drawings
FIG. 1 is a flow chart of a method for displaying a building based on desktop true three-dimensional display according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the detailed description.
Example 1
As shown in fig. 1, 101 in fig. 1 is creating a virtual floor scene in a virtual reality 3D engine. A scene of a complete simulation building is built through three-dimensional drawing software and a virtual reality 3D engine. The simulation building scene mainly comprises three module components: the system comprises a building periphery component, a building appearance component and a sample house component; the three-dimensional drawing software is Maya or 3Dmax, and the virtual reality 3D engine is Unity3D or UE 4. And storing the building related three-dimensional model manufactured by the three-dimensional drawing software into an FBX file format, importing the building related three-dimensional model into a virtual reality 3D engine, and directly calling a Game display window in the engine to construct a building scene virtual module.
In this example, the floor perimeter assembly includes the exterior landscape of the floor perimeter, the floor perimeter traffic. The external landscape of the building mainly comprises greening around the building, supporting facilities around the building and the like; the traffic conditions around the building mainly comprise road position conditions, road traffic capacity, road pavement conditions and the like; the greening around the building can adopt a vegetation system with a virtual reality 3D engine, so that the system is less in occupied resource, the display effect is more real, and meanwhile, model parts such as supporting facilities and the like are manufactured by adopting three-dimensional drawing software.
In this example, the floor appearance component includes a floor size, floor style. The size of the building mainly comprises the height, the width, the floor area and the like of the building; the style styles of the building comprise a Chinese style, an European style, an American style and the like; the dimension standard of the building is the dimension standard in a virtual reality scene, and is not the dimension standard in three-dimensional drawing software, generally speaking, 100 length units in the three-dimensional drawing software are 1 length unit in a virtual reality 3D engine, and the reality of the virtual reality building can be greatly improved by reasonably adjusting the dimension of the building in the virtual reality 3D engine.
In this example, the sample room assembly includes a sample room structure, a sample room arrangement. The template house structure mainly comprises template house size information, house type information and the like; the sample house configuration mainly comprises furniture information of the sample house, electrical appliance information of the sample house, decoration information of the sample house and the like; the template house configuration model file is completely made by three-dimensional drawing software and is imported into a virtual reality 3D engine for scene construction. And inside the sample house, the user can freely add the sample house configuration model to decorate, for example, add furniture model, light model, etc. to build a sample house of a special user.
In fig. 1, 102 is adding a virtual reality interaction module in a virtual floor scene. The module is mainly used for an interactive operation module of a virtual reality building. The interactive module can effectively mobilize the subjective initiative of the user, and meanwhile, the building system can be more vividly displayed through the module. The virtual reality interaction module mainly comprises three module components: the system comprises a voice interaction component, a character interaction component and a model interaction component. Wherein three module assemblies can interoperate with each other. Each component is not strictly independent of the other, e.g., a user may invoke a model response action through voice interaction or a text response action through voice interaction.
In this embodiment, the voice interaction component mainly includes guiding voice and interactive voice. The guiding voice mainly guides the user in a voice prompt mode; the interactive voice is mainly used for voice communication between the client and the display system, and the client can easily complete interactive operation through the voice communication mode; the speech communication language is designated as Mandarin, which has wider popularization range on one hand and higher recognizability in a speech recognition system on the other hand. For example, a user may speak "open" at the door of a board room, which responds by opening the door.
In the embodiment, the text interaction component mainly includes guidance text and introductory text. The guidance characters mainly guide the user in a character form, the introduction characters mainly act on virtual objects in the building display system, and the user can more clearly understand and recognize related objects of the building system in a character description form; the characters are designated as Song style Chinese characters, so that the Song style Chinese characters are wider in popularization on one hand, and the Song style Chinese characters are better in compatibility with a virtual reality 3D engine on the other hand. For example, the user may click on the text button "open door" at the door of the board room, which responds by opening the door.
In this embodiment, the model interaction component is a core component of the virtual reality interaction module, the building scene virtual module mainly comprises a three-dimensional model, and the interactive operation on the relevant three-dimensional model in the building display system brings the experience of being personally on the scene to the user; each three-dimensional model in the interaction module corresponds to one model interaction component, so that the management and modification of the three-dimensional model interaction operation are facilitated. For example, the interactive execution script stays for two seconds on the three-dimensional model template door corresponding to a sight line and then opens the door, and when the sight line of the user stays for two seconds on the template door, the template door executes an opening operation.
In fig. 1, 103 is to arrange a virtual camera matrix to acquire light field information of a virtual scene of a building. The view acquisition system with the plurality of virtual cameras based on spherical distribution is more suitable for real-time acquisition of the virtual scene of the building. The system is characterized in that a plurality of virtual cameras are arranged on the outer circumference by taking a building scene as a circle center to form a camera matrix, and each virtual camera shoots a view in the direction of the respective visual angle. Because all the virtual cameras acquire images simultaneously, the panoramic view shooting time is very short, and the three-dimensional data acquisition of a dynamic scene is facilitated.
In this embodiment, the images updated by one rotation of the directional diffusion screen in the desktop true three-dimensional display system realize 360-degree horizontal light field reconstruction, and if a static three-dimensional scene is reconstructed, the images only need to be updated again in the next rotation period. The number of images updated by one rotation of the directional scattering screen determines the angular resolution of light field reconstruction, the rotation speed of the screen determines the refresh rate of the scene, in order to realize continuous motion parallax of the three-dimensional scene, the angular resolution of the scene cannot be too low, and if the angular resolution of 0.6 degrees is taken as a limit, the number of the images updated by one rotation of the screen is not less than 600, so that 600 virtual cameras are selected from the virtual reality 3D engine to provide 600 frames required by light field display to ensure the continuity of the light field display.
In fig. 1, reference numeral 104 denotes true three-dimensional color data information for creating a virtual building scene, and acquisition parameters of a light field need to be known in order to be able to reproduce the virtual scene in a real manner in the system. The optical axis of the virtual camera is aligned with the center of the shooting circle, and the center is taken as the origin of the world coordinate system. The shooting radius R, the shooting height H and the horizontal and vertical shooting opening angles alpha and beta of the virtual camera are recorded, the projection of the normal direction of the first view on the shooting circle is used as an X-axis, and the normal direction of the shooting circle is used as a Z-axis, so that the light field information recorded by each picture can be quantitatively described.
In this example, for the light field acquisition method of the virtual camera, the view number corresponding to a certain view angle and the point coordinate corresponding to the view angle on the view are calculated according to the ray tracing principle, and then the pixel information can be confirmed. The pixels of the view are uniformly distributed square pixels, and P is arranged in the vertical directionvEach pixel point having P in horizontal directionhAnd each pixel point, the corresponding coordinate of the three-dimensional data information after view conversion is as follows:
Figure BDA0003008335870000061
by using the method, the image pixel points acquired by the virtual camera to the virtual building scene are all brought in for calculation to obtain the color three-dimensional data information of the virtual building scene.
In fig. 1, 105 is a high-speed projector module of a desktop true three-dimensional display system for true three-dimensional display of color true three-dimensional data information. The high-speed projector in the desktop true three-dimensional display system is provided with three DMD chips, the DMD core control module controls the three DMD chips to respectively correspond to R, G, B three information images of a virtual building scene, LED light sources with three colors of RGB are used for independently illuminating each DMD chip, and then the color true three-dimensional display of the virtual building scene is realized through the color combination prism.
In this embodiment, first, RGB separation is performed on color true three-dimensional data information, and the specific method is as follows: and importing the true color image information of the virtual building scene content into digital software Matlab, and separating R, G, B information in Matlab to obtain three data graphs respectively only containing R information, G information and B information. And then transmitting the separated information data graph to a desktop true three-dimensional display system, selecting a color high-speed projector to realize the color true three-dimensional display of the virtual building scene content, wherein the high-speed projector is provided with three DMD chips, independently illuminating each DMD chip by using an LED light source with three colors of RGB, and realizing the color display through a color-combination prism. The projection system comprises a data processing circuit, an RGB LED chip, a TIR prism, an X-cube color-combination prism, a projection lens and the like. The red, green and blue LED light sources irradiate onto the corresponding DMD chips through the TIR prism. And the data processing circuit ensures that each DMD chip displays an image of a corresponding color channel, and the three-color image is subjected to color combination through the X prism and projected onto a screen through the projection lens. The RGB three-color LED light source is in a normally bright state, the specific image displayed by each DMD chip is independently determined by the control panel, and communication among three DMD control panels needs to be constructed or uniform external signals are used for triggering in order to ensure the three-channel synchronism of the final output color image. Through the steps, the color true three-dimensional display of the virtual building scene content can be realized.
Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are intended to be preferred embodiments of the present invention, it is to be understood that the invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.

Claims (7)

1. A method for displaying a building based on desktop true three-dimensional display is characterized by comprising the following steps:
a. creating a virtual building scene in a virtual reality 3D engine;
b. adding a virtual reality interaction module into a virtual building scene;
c. placing a virtual camera matrix to acquire light field information of the virtual scene of the building;
d. generating color true three-dimensional data information of a virtual building scene;
e. and the high-speed projector module of the desktop true three-dimensional display system performs true three-dimensional display on the color true three-dimensional data information.
2. The method for displaying the building based on the desktop true three-dimensional display according to claim 1, wherein the step a is specifically that a completely simulated building scene is built through three-dimensional drawing software and a virtual reality 3D engine, and the simulated building scene mainly comprises three module components: the system comprises a building periphery component, a building appearance component and a sample house component; and storing the building related three-dimensional model manufactured by the three-dimensional drawing software into an FBX file format, importing the building related three-dimensional model into a virtual reality 3D engine, and directly calling a Game display window in the engine to construct a building scene virtual module.
3. The method as claimed in claim 2, wherein the three-dimensional drawing software is Maya or 3Dmax, and the virtual reality 3D engine is Unity3D or UE 4.
4. The method for displaying the building based on the desktop true three-dimensional display as claimed in claim 1, wherein the virtual reality interaction module in the step b is composed of three module components: the system comprises a voice interaction component, a character interaction component and a model interaction component.
5. The floor display method based on desktop true three-dimensional display according to claim 1, wherein a plurality of virtual camera view acquisition systems based on spherical distribution are adopted for acquisition in step c, the system places a plurality of virtual cameras around the floor scene as a circle center to form a camera matrix, and each virtual camera shoots a view in a respective view angle direction.
6. The method for displaying the building based on the desktop true three-dimensional display as claimed in claim 1, wherein the step d is specifically to calculate the color three-dimensional data information of the virtual building scene by substituting all image pixel points acquired by the virtual camera into the following formula:
Figure FDA0003008335860000021
wherein R is the shooting radius of the virtual camera, H is the shooting height of the virtual camera, alpha is the horizontal shooting field angle of the virtual camera, beta is the vertical shooting field angle of the virtual camera, and P isvIs the number of pixel points in the vertical direction, PhIs the number of pixel points in the horizontal direction.
7. The method for displaying the building based on the desktop true three-dimensional display according to claim 1, wherein the high-speed projector in the desktop true three-dimensional display system specifically comprises three DMD chips in step e, the DMD core control module controls the three DMD chips to respectively correspond to R, G, B information images of the virtual building scene, the three RGB LED light sources are used to independently illuminate each DMD chip, and the color true three-dimensional display of the virtual building scene is realized through the color-combining prism.
CN202110368554.7A 2021-04-06 2021-04-06 Building exhibition method based on desktop true three-dimensional display Pending CN113112602A (en)

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