CN106570927A - Method of realizing virtual reality based on Android system, terminal and system - Google Patents
Method of realizing virtual reality based on Android system, terminal and system Download PDFInfo
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- CN106570927A CN106570927A CN201610899336.5A CN201610899336A CN106570927A CN 106570927 A CN106570927 A CN 106570927A CN 201610899336 A CN201610899336 A CN 201610899336A CN 106570927 A CN106570927 A CN 106570927A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T15/00—3D [Three Dimensional] image rendering
- G06T15/10—Geometric effects
- G06T15/20—Perspective computation
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Abstract
The invention discloses a method of realizing virtual reality based on an Android system, a terminal and a system. The method comprises steps: a Surface Flinger program is called, and a to-be-displayed image is acquired; OpenGL is called to render the to-be-displayed image; a user head action is acquired through a sensor to obtain a perspective matrix for the left eye and the right eye of the user, and texture corresponding to the to-be-displayed image is obtained; and the texture corresponding to the left eye and the right eye are drawn on a left-side screen and a right-side screen respectively through the OpenGL. No special virtual reality application needs to be downloaded but the virtual reality can be realized through the display terminal with the Android system, the cost is low, and the application range is wide.
Description
Technical field
The present invention relates to technical field of virtual reality, is realized virtually now based on android system in particular to a kind of
Real method, terminal and system.
Background technology
Virtual reality (Virtual Reality, VR) technology is a kind of computer that can be created with the experiencing virtual world
Emulation technology, is interactively Three-Dimensional Dynamic what comes into a driver's and the system emulation of entity behavior of a kind of Multi-source Information Fusion, and it utilizes
Computer generates a kind of simulated environment, and for example, user is completed by wearing the equipment such as virtual implementing helmet and virtual reality system
The interaction of system.
In recent years, Android (ARIXTRA) systems are operated because being increasingly becoming the advantages of which is increased income in numerous virtual reality systems
The first-selection of system.But, the left eye picture and right eye picture of virtual reality device are independent, need to draw with two simultaneously
Face, and existing ARIXTRA application not individually develops design for virtual reality device, only with a picture, it is impossible to meet user
Demand.In this regard, prior art generally needs to install special virtual reality applications, for example, need VR players, ability are installed
Screen-picture is shown as into left and right two halves, and cannot be using the original player of android system or Online Video application, this
Not only increase cost, and its scope of application can be limited.
The content of the invention
In consideration of it, the embodiment of the present invention provides and a kind of realize the method for virtual reality, terminal based on android system and be
System, realizes virtual reality by the display terminal with android system by need not downloading special virtual reality applications, into
This is low and applied widely.
The method that virtual reality is realized based on android system of one embodiment of the invention, including：Call Android systems
The Surface Flinger programs of system, and the image to be displayed of android system is obtained by Surface Flinger programs；
The OpenGL of android system is called, and image to be displayed is rendered by OpenGL；By sensor acquisition account
Portion's action is to obtain the perspective matrix of user's left eye and right eye, and obtains corresponding with the perspective matrix of left eye and right eye to be shown
The texture of image；Left eye and the corresponding texture of right eye are plotted in two width images to be displayed respectively by OpenGL, and are shown
In the left screen and right screen of android system.
Alternatively, after Surface Flinger programs are called, methods described also includes：Set up independently of Android
Frame buffer zone outside the buffer area of system, frame buffer zone are used for caching and render the number related to texture operation to OpenGL execution
According to.
Alternatively, sensor includes at least one of gyroscope, photographic head and acceleration sensor.
The terminal that virtual reality is realized based on android system of one embodiment of the invention, including：Processing module, is used for
The Surface Flinger programs of android system are called, and android system is obtained by Surface Flinger programs
Image to be displayed；Processing module is additionally operable to the open graphic library OpenGL for calling android system；Rendering module, for leading to
Cross OpenGL to render image to be displayed；Sensing module, for obtaining user's head action；Processing module is additionally operable to basis
The user's head action that sensing module is obtained obtains the perspective matrix of user's left eye and right eye, and obtains saturating with left eye and right eye
Depending on the texture of the corresponding image to be displayed of matrix；Processing module is further used for left eye and the corresponding stricture of vagina of right eye by OpenGL
Reason is plotted in two width images to be displayed respectively, and is shown in the left screen and right screen of android system.
Alternatively, after Surface Flinger programs are called, processing module is additionally operable to set up independently of Android
Frame buffer zone outside the buffer area of system, the frame buffer zone render related to texture operation for caching and OpenGL execution
Data.
The system that virtual reality is realized based on android system of one embodiment of the invention, including external terminal and with it is outer
The display terminal with android system of terminal connection is connect, the display terminal has sensor, wherein：External terminal is used
In carry out information exchange with display terminal so that display terminal android system produce image；Display terminal is used to call
The display synthesis Surface Flinger programs of android system, and Android is obtained by Surface Flinger programs
The image to be displayed of system；Display terminal is additionally operable to the open graphic library OpenGL for calling android system, and passes through OpenGL
Image to be displayed is rendered；The user's head action for being further used for obtaining by sensor obtains user's left eye and right eye
Perspective matrix, and obtain the texture of image to be displayed corresponding with the perspective matrix of left eye and right eye, then by OpenGL
Left eye and the corresponding texture of right eye are plotted in two width images to be displayed respectively, and are shown in left screen and right screen.
Alternatively, after Surface Flinger programs are called, display terminal is additionally operable to set up independently of Android
Frame buffer zone outside the buffer area of system, the frame buffer zone render related to texture operation for caching and OpenGL execution
Data.
Alternatively, sensor includes at least one of gyroscope, photographic head and acceleration sensor.
Alternatively, the connected mode between external terminal and display terminal is included in bluetooth, Wi-Fi and wired connection extremely
Few one kind.
Beneficial effect：The embodiment of the present invention is realized by the Surface Flinger programs and OpenGL of android system
Image to be displayed is rendered, and the headwork with reference to the user of sensor acquisition obtains the perspective matrix pair of left eye and right eye
The texture of the image to be displayed answered, then carries out texture processing to image to be displayed by OpenGL, separate so as to obtain
Left eye picture and right eye picture, need not download special virtual reality applications, only need to be by the display end with android system
The i.e. achievable virtual reality in end, low cost, and it is applied widely.
Description of the drawings
Fig. 1 is the flow chart of the method that virtual reality is realized based on android system of first embodiment of the invention；
Fig. 2 is the structural representation of one embodiment of system that virtual reality is realized based on android system of the present invention；
Fig. 3 is the flow chart of the method that virtual reality is realized based on android system of second embodiment of the invention；
Fig. 4 is the principle frame schematic diagram of one embodiment of terminal that virtual reality is realized based on android system of the present invention；
Fig. 5 is the hardware architecture diagram of the embodiment of terminal one shown in Fig. 4.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the skill to each exemplary embodiment provided by the present invention
Art scheme is clearly and completely described.In the case where not conflicting, the feature in following each embodiment and embodiment can
To be mutually combined.
Fig. 1 is referred to, is the virtual reality method of first embodiment of the invention.The virtual reality method can be based on figure
Virtual reality system 20 shown in 2, the display with android system being connected including external terminal 22 and with external terminal 22
Terminal 21.At least one realization that can be crossed between external terminal 22 and display terminal 21 in bluetooth, Wi-Fi and wired connection
Connection.External terminal 22 for carrying out information exchange with display terminal 21, as display terminal 21 is in display virtual real image
Shi Wufa is directly interacted with user using which, and external terminal 22 can just control display terminal 21, such as in external terminal
Under 22 control, the android system of display terminal 21 produces various images.Wherein, display terminal 21 and external terminal 22 can be with
For portable electronics such as smart mobile phone, PDA (Personal Digital Assistant, personal digital assistant or panel computer)
Equipment, or the wearable device for being worn on limbs or being embedded in medicated clothing, jewelry, accessory, can also be other tools
There is the intelligent electronic device of display function.
With reference to Fig. 1 and Fig. 2, S11～S14 the step of methods described can include is introduced.
S11：The Surface Flinger programs of android system are called, and is obtained by Surface Flinger programs
Take the image to be displayed of android system.
Wherein, Surface Flinger programs perform initialization operation after called, to obtain 21 screen of display terminal
VSync (frame synchronization) signal, acquired image to be displayed is each frame image to be displayed.
Program runs in android system process Surface Flinger (showing synthesis), and itself and Android
Application program (application program installed by android system) is operated in different processes, and Binder is adopted between them
(bonding) mechanism is communicated.Each Android application program can be connected with Surface Flinger programs.Also,
After Android application programs are successfully connected Surface Flinger programs, a corresponding Client (client can be just obtained
End) object Binder interfaces, then Surface Flinger programs can think that every Android application programs draw UI
(User Interface, user interface).That is, the UI of android system be shown to the screen of display terminal 21 with
And during external terminal 22, Surface Flinger programs play the role of Flinger (conjunction winner), will
In android system, the final mapping result of all application programs is mixed, and then unification is shown on screen.
The drawing process is by each two field picture by OpenGL (Open Graphics Library, open graphic library)
It is plotted to buffer area to be rendered and lines process, group is carried out to each two field picture by Surface Flinger programs again then
Close.
In view of image to be displayed generally includes the surface chart that the image and android system of the application program for running are carried
The image of the information such as the battery electric quantity that shows above picture, such as screen, time, signal intensity, it is therefore desirable to determine figure to be shown
The display relation of each display content as in.The interface image that such as android system is carried should cover a part of application program
Image, i.e., there is overlaying relation between two kinds images.Certainly, other embodiment can limit display relation and include but is not limited to
Splicing relation, display orientation and orbution.In practical application scene, the present embodiment can be in the caching of android system
Area is pre-created Client classes, then to Surface Flinger programs application figure layer (Layer), by determining the aobvious of figure layer
Show relation to determine the display relation of each display content.
S12：The OpenGL of android system is called, and image to be displayed is rendered by OpenGL.
So-called rendering refers to OpenGL and merges each display content in image to be displayed according to display relation, melts
An image is obtained after conjunction.
S13：Obtain user's head action to obtain the perspective matrix of user's left eye and right eye by sensor, and obtain with
The texture of the corresponding image to be displayed of perspective matrix of left eye and right eye.
Wherein, sensor can be initialized when step S11 starts the Surface Flinger programs.
Sensor detection is the user's head action when previous frame image to be displayed switches to this frame image to be displayed
Change, according to the variable quantity of sensor detection data, you can obtain the rotation of user's left eye and right eye between adjacent two field pictures
Variable quantity.According to left eye and the rotationally-varying amount of right eye, and with reference to the conversion of existing perspective projection matrix, you can obtain this frame
The perspective matrix of image to be displayed, so as to obtain the texture of this frame image to be displayed.Due to left eye and right eye perspective matrix not
Together, the texture of the image to be displayed for obtaining also has slight difference.
Wherein, sensor can be gyroscope, also be included but is not limited in photographic head and acceleration sensor certainly extremely
It is few one.
S14：Left eye and the corresponding texture of right eye are plotted in two width images to be displayed respectively by OpenGL, and are shown
In the left screen and right screen of android system.
Need left eye to be respectively using screen in view of virtual reality and right eye provides display, therefore screen into left side
Screen and right screen, the image shown in left screen and right screen are independent, in addition it is also necessary to enter image to be displayed
Row scaling.OpenGL distinguishes left eye and right eye in image to be displayed that corresponding texture rendering is scaled to two width and single,
So as to obtain the left eye picture that left screen shows and the right eye picture that right screen shows.
From the foregoing, the embodiment of the present invention need not download special virtual reality applications, you can obtain separate
Left eye picture and right eye picture, i.e., only need to be capable of achieving virtual reality, cost by the display terminal with android system
It is low and applied widely.
Fig. 3 is referred to, is the virtual reality method of second embodiment of the invention.What the virtual reality method can include
Step S31～S34.
S31：The Surface Flinger programs of android system are called, and is obtained by Surface Flinger programs
Take the image to be displayed of android system.
S32：Set up independently of the frame buffer zone (Frame Buffer) outside the buffer area of android system.
S33：The OpenGL of android system is called, and OpenGL is tied to into frame buffer zone by frame buffer function, and
Image to be displayed is rendered by OpenGL.
It is described by OpenGL by frame buffer function be tied to frame buffer zone represent OpenGL perform render and texture operation
All it is that image to be displayed is plotted to into frame buffer zone, rather than the buffer area of android system.Frame buffer zone caching is held with OpenGL
Row renders the data related to texture operation.
S34：Obtain user's head action to obtain the perspective matrix of user's left eye and right eye by sensor, and obtain with
The texture of the corresponding image to be displayed of perspective matrix of left eye and right eye.
S35：Left eye and the corresponding texture of right eye are plotted in two width images to be displayed respectively by OpenGL, and are shown
In the left screen and right screen of android system.
On the basis of previous embodiment but it is different from, the present embodiment individually sets up a frame buffer zone, OpenGL
All related datas of the texture operation rendered to image to be displayed are stored in the frame buffer zone such that it is able to realized
Off screen renders (Offscreen Rendering).
Fig. 4 is referred to, is the terminal that virtual reality is realized based on android system of one embodiment of the invention.The end
End 40 includes processing module 41, rendering module 42 and sensing module 43.Processing module 41 is used to call android system
Surface Flinger programs, and the image to be displayed of android system is obtained by Surface Flinger programs.Process
Module 41 is additionally operable to the open graphic library OpenGL for calling android system.Rendering module 42 is for treating aobvious by OpenGL
Diagram picture is rendered.Sensing module 43 is used to detect user's head action.Processing module 41 is additionally operable to according to sensing module 43
The user's head action of acquisition obtains the perspective matrix of user's left eye and right eye, and obtains the perspective matrix pair with left eye and right eye
The texture of the image to be displayed answered.Processing module 41 is further used for distinguishing left eye and the corresponding texture of right eye by OpenGL
It is plotted in two width images to be displayed, and is shown in the left screen and right screen of android system.
Alternatively, after Surface Flinger programs are called, processing module 41 be additionally operable to set up independently of
Frame buffer zone outside the buffer area of android system, the frame buffer zone are used for caching and are rendered and texture with OpenGL execution
The related data of operation.
The above-mentioned module correspondence of the terminal 40 of the embodiment of the present invention performs the virtual reality method of above-mentioned each embodiment, tool
There is same technique effect.
It should be appreciated that above-mentioned module is divided into a kind of division of logic function, when actually realizing, there can be other drawing
The mode of dividing, such as two modules are desirably integrated in another system, or some features can be ignored, or are not performed.In addition, mould
Block connection each other can pass through some interfaces, or electrical or other forms.Above-mentioned module can both adopt soft
The form of part functional block is realized, it would however also be possible to employ the form of the hardware for example shown in Fig. 5 is realized.
Refering to Fig. 5, the terminal 40 includes that screen 55, at least a processor 51, an at least memorizer 52, at least one lead to
Letter interface 53 and an at least communication bus 54, at least one sensor 56, communication interface 53 can be used for terminal 40 and external world's end
End carries out information exchange, and communication bus 54 calls various data, memorizer 52 to instruct for storage program for processor 51.For
Facilitate explanation, processor 51 shown in Fig. 5, memorizer 52 and communication bus 54, the quantity of sensor 56 are one.Wherein,
The processor 51 is used for：
Execute program instructions are to call the Surface Flinger programs of android system, and pass through Surface
Flinger programs obtain the image to be displayed of android system；
Execute program instructions are calling the open graphic library OpenGL of android system；
Execute program instructions are being rendered to image to be displayed by OpenGL；
Execute program instructions are to control the detection user's head action of sensor 56, and obtained according to the user's head action for obtaining
To user's left eye and the perspective matrix of right eye, and obtain the stricture of vagina of image to be displayed corresponding with the perspective matrix of left eye and right eye
Reason；
Execute program instructions are being respectively plotted to two to be shown figures by left eye and the corresponding texture of right eye by OpenGL
As in, to obtain left eye picture and right eye picture；
Left eye picture is shown in left screen with control screen 55 and is shown in right eye picture by execute program instructions
Right screen.
Alternatively, after Surface Flinger programs are called, processor 51 is additionally operable to execute program instructions to set up
Independently of the frame buffer zone outside the buffer area of android system, the frame buffer zone is used for caching and is rendered with OpenGL execution
The data related to texture operation.
If the above-mentioned functions of the embodiment of the present invention are realized using in the form of SFU software functional unit and as independent product pin
When selling or using, it is storable in a computer read/write memory medium, i.e., the embodiment of the present invention can be with software product
Form is embodied, and which includes that some instructions are used so that terminal performs all or part of step of each embodiment methods described.
Illustrate again, the foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, it is every
The equivalent structure made using description of the invention and accompanying drawing content or equivalent flow conversion, such as between each embodiment, technology is special
That what is levied be combined with each other, or is directly or indirectly used in other related technical fields, and the patent for being included in the present invention in the same manner is protected
In the range of shield.
Claims (9)
1. a kind of method that virtual reality is realized based on android system, it is characterised in that include：
The display of android system is called to synthesize Surface Flinger programs, and by the Surface Flinger journeys
Sequence obtains the image to be displayed of android system；
The open graphic library OpenGL of the android system is called, and the image to be displayed is entered by the OpenGL
Row is rendered；
User's head action is obtained to obtain the perspective matrix of user's left eye and right eye by sensor, and is obtained and the left eye
With the texture of the corresponding image to be displayed of the perspective matrix of right eye；
The left eye and the corresponding texture of right eye are plotted in image to be displayed described in two width respectively by the OpenGL, and
It is shown in the left screen and right screen of the android system.
2. method according to claim 1, it is characterised in that after the Surface Flinger programs are called, institute
Stating method also includes：
Set up independently of the frame buffer zone outside the buffer area of the android system, the frame buffer zone is used for caching and institute
State OpenGL execution and render the data related to texture operation.
3. method according to claim 1, it is characterised in that the sensor includes gyroscope, photographic head and acceleration
At least one of sensor.
4. a kind of terminal that virtual reality is realized based on android system, it is characterised in that include：
Processing module, the display for calling android system synthesize Surface Flinger programs, and by described
Surface Flinger programs obtain the image to be displayed of android system；
The processing module is additionally operable to the open graphic library OpenGL for calling the android system；
Rendering module, for being rendered to the image to be displayed by the OpenGL；
Sensing module, for obtaining user's head action；
The user's head action that the processing module is additionally operable to be obtained according to the sensing module obtains user's left eye and right eye
Perspective matrix, and obtain the texture of image to be displayed corresponding with the perspective matrix of the left eye and right eye；
The processing module is further used for being plotted to the left eye and the corresponding texture of right eye respectively by the OpenGL
In image to be displayed described in two width, and it is shown in the left screen and right screen of the android system.
5. terminal according to claim 4, it is characterised in that after the SurfaceFlinger programs are called, institute
State processing module to be additionally operable to set up independently of the frame buffer zone outside the buffer area of the android system, the frame buffer zone
Perform to the OpenGL for caching and render the data related to texture operation.
6. a kind of system that virtual reality is realized based on android system, it is characterised in that the system include external terminal and
The display terminal with the android system being connected with the external terminal, the display terminal have sensor, its
In：
The external terminal for carry out information exchange with the display terminal so that the display terminal android system produce
Raw image；
The display terminal is used to call the display of android system to synthesize Surface Flinger programs, and by described
Surface Flinger programs obtain the image to be displayed of android system；
The display terminal is additionally operable to the open graphic library OpenGL for calling the android system, and passes through the OpenGL
The image to be displayed is rendered；
It is further used for the perspective matrix of user's left eye and right eye is obtained by the user's head action that the sensor is obtained, and
The texture of image to be displayed corresponding with the perspective matrix of the left eye and right eye is obtained, then will be described by the OpenGL
Left eye and the corresponding texture of right eye are plotted in image to be displayed described in two width respectively, and are shown in left screen and right side screen
Curtain.
7. system according to claim 6, it is characterised in that after the Surface Flinger programs are called, institute
State display terminal to be additionally operable to set up independently of the frame buffer zone outside the buffer area of the android system, the frame buffer zone
Perform to the OpenGL for caching and render the data related to texture operation.
8. system according to claim 6, it is characterised in that the sensor includes gyroscope, photographic head and acceleration
At least one of sensor.
9. system according to claim 6, it is characterised in that the connection between the external terminal and the display terminal
Mode includes at least one in bluetooth, Wi-Fi and wired connection.
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Application publication date: 20170419 |