CN106162142A - A kind of efficient VR scene drawing method - Google Patents
A kind of efficient VR scene drawing method Download PDFInfo
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- CN106162142A CN106162142A CN201610415785.8A CN201610415785A CN106162142A CN 106162142 A CN106162142 A CN 106162142A CN 201610415785 A CN201610415785 A CN 201610415785A CN 106162142 A CN106162142 A CN 106162142A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/20—Image signal generators
- H04N13/275—Image signal generators from 3D object models, e.g. computer-generated stereoscopic image signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N2013/40—Privacy aspects, i.e. devices showing different images to different viewers, the images not being viewpoints of the same scene
- H04N2013/405—Privacy aspects, i.e. devices showing different images to different viewers, the images not being viewpoints of the same scene the images being stereoscopic or three dimensional
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- Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
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- Processing Or Creating Images (AREA)
Abstract
The invention discloses a kind of efficient VR scene drawing method, comprise the following steps: (1) carries out the differentiation of far and near level to scene, for the object of level farther out, only renders once, for nearer object, renders twice；(2) distant objects is the most once rendered: first create a public texture A, it is used for preserving the rendering result of far-end object, use the virtual out new camera ' in position in the middle of two camera, rendering of far-end object is carried out with camera ', and rendering result is saved in texture A, when rendering real left-eye view, first texture A is painted on screen, object the most nearby is painted on screen successively according to left eye camera, right-eye view in like manner, finally merges the rendering result of right and left eyes；(3) the level demarcation line of distance is determined.The rendering efficiency of the present invention has bigger lifting, under identical scene, when separating surface selects left and right camera distance about × 100, and performance boost more than 60%.
Description
Technical field
The present invention relates to VR rendering engine technical field, specifically a kind of efficient VR scene drawing method.
Background technology
In VR scene, the effect different in order to realize left and right eyes, need to render two figures simultaneously, respectively left eye regards
Figure and right-eye view, in order to preferably embody 3D effect, the Camera position of right and left eyes view is different, which results in
One problem, due to the movement of Camera, can cause repainting of whole scene, so can reduce rendering efficiency greatly.
Existing VR scene drawing method is: first simulation left eye carries out scene rendering, 1. determines the position of Camera1,2. to all
Object carries out z-order, renders all of object the most successively；Simulation right eye carries out scene rendering afterwards, 1. determines the position of Camera2
Putting, 2. pair all objects carry out z-order, render all of object the most successively.Existing VR scene drawing method poor-performing,
This equipment of mobile phone is difficult to accomplish extra high frame per second, bad to the experience of user.
Owing to VR is the new interaction scenarios of a kind of comparison, thus its to render mode the most incomplete same, be first exactly that it is left
The mode that renders of right eye can cause the change of Camer position, thus rendering speed can be halved.Speed is rendered in order to improve
Degree, defines a kind of brand-new mode that renders-distance layer rendering.
Summary of the invention
It is an object of the invention to provide a kind of efficient VR scene drawing method, to solve above-mentioned background technology proposes
Problem.
For achieving the above object, the present invention provides following technical scheme:
A kind of efficient VR scene drawing method, comprises the following steps:
(1) scene is carried out the differentiation of far and near level: first obtain the centre position of left and right camera, calculate the most successively
In scene, all objects are apart from the distance in this centre position, when distance is more than the value specified when, are considered as this object
Belong to that object of level farther out, when distance less than designated value when, it is believed that it belongs to nearer level；In left and right
In the render process of camera, for the object of level farther out, only render once, for nearer object, render twice；
(2) distant objects is the most once rendered: first create a public texture A, texture A and be used for preserving far-end
The rendering result of object, uses the virtual out new camera ' in position in the middle of two camera, afterwards with this
Camera ' carries out rendering of far-end object, and rendering result is saved in texture A, when rendering real left-eye view,
First texture A is painted on screen, object the most nearby is painted on screen successively according to left eye camera, wash with watercolours
Contaminate real right-eye view in like manner, finally merge the rendering result of right and left eyes, it becomes possible to render out by final object；
(3) the level demarcation line of distance is determined: carried out the differentiation of distance by a formula, if the distance of left and right eyes
For x, far and near differentiation distance is a constant for y, y=Ax+B, A and B, is looked in effect and performance by the value adjusting A and B
To an equilibrium point.
As the further scheme of the present invention: the right side of object nearer in step (1), less than overall 50%, renders performance
It also is able to promote.
As the present invention further scheme: described in step (2), texture A and screen size are equal.
Compared with prior art, the invention has the beneficial effects as follows: rendering efficiency has bigger lifting, in identical scene
Under (10000 summits, texture size 1024 × 10240), when separating surface select left and right camera distance about × 100 time, property
More than 60% (before for 32fps, rise to 50fps after amendment) can be promoted.
Accompanying drawing explanation
Fig. 1 is the technical schematic diagram of step (1) in efficient VR scene drawing method.
Fig. 2 is the techniqueflow chart of step (1) in efficient VR scene drawing method.
Fig. 3 is the technical schematic diagram of step (2) in efficient VR scene drawing method.
Fig. 4 is the techniqueflow chart of step (2) in efficient VR scene drawing method.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Refer to Fig. 1～4, in the embodiment of the present invention, a kind of efficient VR scene drawing method, comprise the following steps:
(1) how scene is carried out the differentiation of far and near level；
Due to the special circumstances of VR, the position of right and left eyes (left and right camera) is actually the nearest, say, that logical
Crossing the content that two camer render out is relatively, and the most remote object is the most consistent, at the thing of unlimited distance
Body is the most living, but but need nonetheless remain in traditional scheme rendering twice.Can also so think, necessarily
Distance object in addition, it is believed that it is the same, and the effect the most so rendering out is that user is entirely acceptable；
The module just ratio of the differentiation that scene so carries out far and near level is more visible, first obtains in the camera of left and right
Between position, calculate all objects distance apart from this centre position in scene the most successively, when distance is more than the value specified
Time, it is considered as this object and belongs to that object of level farther out, the when of if less than designated value, it is believed that it belongs to nearer
Level.In the render process of left and right camera, for the object of level farther out, only render once, for nearer object,
Render twice, the 50% of the right entirety of the nearest object less than, then render performance and also be able to promote a lot.As
Shown in Fig. 1, object A is the object before separating surface, say, that data object nearby, needs to render twice, and object B and
Figure after object C is separating surface carries, it is only necessary to render once the most permissible.
(2) how distant objects is the most once rendered；
As shown in Figure 3-4, first creating a big public texture (texture A) the same with screen, this texture is used for
Preserve the rendering result of far-end object, use the virtual out new camera ' in position in the middle of two camera afterwards, with
This camera ' carries out rendering of far-end object, and rendering result is saved in texture A, regards when rendering real left eye
During figure, on screen of first texture A being painted to, object the most nearby is painted to screen successively according to left eye camera
On, right eye is also similar process, this makes it possible to render out by final object.
(3) the level demarcation line of distance how is determined；
This is the distance dependent system with right and left eyes, is carried out the differentiation of distance by a simple formula, it is assumed that
The distance of left and right eyes is x, and far and near differentiation distance is y, then y=Ax+B, A and B are a constant, by adjusting A's and B
Value can find a good equilibrium point in effect and performance.
The rendering efficiency of the present invention has bigger lifting, (10000 summits, texture size under identical scene
1024 × 10240), when separating surface selects left and right camera distance about × 100, performance boost more than 60% (is before
32fps, rises to 50fps after amendment).
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.Should not be considered as limiting involved claim by any reference in claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (3)
1. an efficient VR scene drawing method, it is characterised in that comprise the following steps:
(1) scene is carried out the differentiation of far and near level: first obtain the centre position of left and right camera, calculating scene the most successively
Middle all objects, apart from the distance in this centre position, when distance is more than the value specified when, are considered as this object and belong to
That object of level farther out, when distance less than designated value when, it is believed that it belongs to nearer level；Left and right camera's
In render process, for the object of level farther out, only render once, for nearer object, render twice；
(2) distant objects is the most once rendered: first create a public texture A, texture A and be used for preserving far-end object
Rendering result, use the virtual out new camera ' in position in the middle of two camera afterwards, come with this camera '
Carry out rendering of far-end object, and rendering result is saved in texture A, when rendering real left-eye view, first by stricture of vagina
Reason A paints on screen, is painted to successively on screen according to left eye camera by object the most nearby, renders real
Right-eye view in like manner, finally merges the rendering result of right and left eyes, it becomes possible to render out by final object；
(3) the level demarcation line of distance is determined: carried out the differentiation of distance by a formula, if the distance of left and right eyes is x,
Far and near differentiation distance is a constant for y, y=Ax+B, A and B, finds one by the value adjusting A and B in effect and performance
Individual equilibrium point.
Efficient VR scene drawing method the most according to claim 1, it is characterised in that object nearer in step (1)
The right side less than overall 50%, render performance and also be able to promote.
Efficient VR scene drawing method the most according to claim 1, it is characterised in that texture A described in step (2) and
Screen size is equal.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282648A (en) * | 2018-02-05 | 2018-07-13 | 北京搜狐新媒体信息技术有限公司 | A kind of VR rendering intents, device, Wearable and readable storage medium storing program for executing |
| CN111915709A (en) * | 2019-05-10 | 2020-11-10 | 阿里巴巴集团控股有限公司 | Rendering method and device |
| CN114095655A (en) * | 2021-11-17 | 2022-02-25 | 海信视像科技股份有限公司 | Method and device for displaying streaming data |
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Effective date of abandoning: 20210319 |