CN113963103A - Rendering method of three-dimensional model and related device - Google Patents
Rendering method of three-dimensional model and related device Download PDFInfo
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- CN113963103A CN113963103A CN202111250189.6A CN202111250189A CN113963103A CN 113963103 A CN113963103 A CN 113963103A CN 202111250189 A CN202111250189 A CN 202111250189A CN 113963103 A CN113963103 A CN 113963103A
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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
- G06T15/205—Image-based rendering
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
Abstract
The application discloses a three-dimensional model rendering method and a related device, which can be applied to the field of artificial intelligence, the field of cloud computing, the field of big data and the like, a three-dimensional model of which an interface needs to be rendered is obtained, a first person visual angle of the interface is obtained, a visible area and an invisible area of the three-dimensional model are determined according to the first person visual angle, the visible area is an area which can be seen when a user observes the interface by adopting the first person visual angle, the invisible area is an area which cannot be seen when the user observes the interface by adopting the first person visual angle, therefore, when the three-dimensional model is rendered, rendering of first quality is executed on the visible area, rendering of second quality is executed on the invisible area, and the first quality is larger than the second quality. Therefore, for the invisible area of the three-dimensional model observed by adopting the first person visual angle, the rendering is executed by adopting the quality lower than that of the visible area of the three-dimensional model, the rendering speed is improved, the rendering time of the three-dimensional model is reduced, and the rendering efficiency is improved.
Description
Technical Field
The invention relates to the technical field, in particular to a rendering method of a three-dimensional model and a related device.
Background
After the three-dimensional model is created, the model needs to be subjected to mapping and light distribution adjustment, and the model are fused together by using software, so that the model is presented as a real object, and the process is called three-dimensional rendering.
In the related art, in order to restore the surface of a real object as much as possible, the efficiency and performance of three-dimensional rendering are improved mainly by using methods such as improving hardware performance and optimizing algorithms, and the time required for three-dimensional rendering with higher quality is longer, and the requirements on hardware performance are higher.
Since three-dimensional rendering is excessively dependent on hardware technology and algorithm performance, it is difficult to improve rendering efficiency with the same hardware technology.
Disclosure of Invention
In view of the above problems, the present application provides a rendering method and a related apparatus for a three-dimensional model, which are used to improve rendering efficiency under the condition of the same hardware technology.
Based on this, the embodiment of the application discloses the following technical scheme:
in one aspect, an embodiment of the present application provides a method for rendering a three-dimensional model, where the method includes:
acquiring a three-dimensional model required by an interface and a first person viewing angle of the interface;
determining a visible region and an invisible region of the three-dimensional model according to the first person perspective;
performing rendering of a first quality on the visible area, and performing rendering of a second quality on the invisible area to obtain a rendered three-dimensional model; wherein the first mass is greater than the second mass.
Optionally, the performing of the rendering of the second quality on the invisible area includes:
no rendering is performed on the invisible area.
Optionally, the determining the visible region and the invisible region of the three-dimensional model according to the first human-person perspective includes:
and according to the first person perspective, determining an occluded area and/or an area with a distance larger than a first distance in the three-dimensional model as an invisible area, and determining an area except the invisible area in the three-dimensional model as a visible area.
Optionally, the performing three-dimensional rendering of the visible region at the first quality includes:
according to the first person perspective, determining the visible region with the distance larger than a second distance threshold value as a first visible subregion, and determining the visible region with the distance smaller than or equal to the second distance threshold value as a second visible subregion;
performing a three-dimensional rendering of a third quality on the first visible subregion, performing a three-dimensional rendering of the first quality on the second visible subregion; wherein the third mass is less than the first mass and the third mass is greater than the second mass.
Optionally, the method further includes:
predicting a variation range of a first-person perspective of the interface;
determining an undetermined visible region and an undetermined invisible region of the three-dimensional model according to the variation range;
and performing rendering of a first quality on the to-be-determined visible region, and performing rendering of a second quality on the to-be-determined invisible region to obtain a rendered to-be-determined three-dimensional model.
Optionally, the three-dimensional model is a static model and/or the number of sub-models in the three-dimensional model is greater than a number threshold.
In another aspect, the present application provides an apparatus for rendering a three-dimensional model, the apparatus comprising: the device comprises an acquisition unit, a determination unit and a rendering unit;
the acquisition unit is used for acquiring a three-dimensional model required by an interface and a first person viewing angle of the interface;
the determining unit is used for determining a visible area and an invisible area of the three-dimensional model according to the first person perspective;
the rendering unit is used for performing rendering of a first quality on the visible area and performing rendering of a second quality on the invisible area to obtain a rendered three-dimensional model; wherein the first mass is greater than the second mass.
In another aspect, the present application provides a computer device comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to perform the method of the above aspect according to instructions in the program code.
In another aspect the present application provides a computer readable storage medium for storing a computer program for performing the method of the above aspect.
In another aspect, embodiments of the present application provide a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the computer device to perform the method of the above aspect.
Compared with the prior art, the technical scheme of the application has the advantages that:
the method comprises the steps of obtaining a three-dimensional model needing to be rendered on an interface and a first person visual angle of the interface, determining a visible area and an invisible area of the three-dimensional model according to the first person visual angle, wherein the visible area can be seen when a user observes the interface by adopting the first person visual angle, and the invisible area cannot be seen when the user observes the interface by adopting the first person visual angle, so that when the three-dimensional model is rendered, rendering of first quality is performed on the visible area, rendering of second quality is performed on the invisible area, and the first quality is larger than the second quality. Therefore, for the invisible area of the three-dimensional model observed by the first person visual angle, the rendering is executed by adopting the quality lower than that of the visible area of the three-dimensional model, namely, the rendering is executed without adopting the quality equal to that of the visible area, the rendering speed is improved, the rendering time of the three-dimensional model is reduced, and the rendering efficiency is improved under the condition of the same hardware technology.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of rendering of a three-dimensional model provided herein;
FIG. 2 is a rendering schematic of a three-dimensional model provided herein;
fig. 3 is a block diagram of a computer device according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the related art, three-dimensional rendering is performed in accordance with the entirety of a three-dimensional model. For example, when the three-dimensional model is a sphere, the whole sphere is rendered three-dimensionally, that is, the first-person perspective of the interface where the sphere is located is that the user is facing the sphere, and then the high-quality three-dimensional rendering is performed on the back of the sphere, that is, the position that the user cannot see, which wastes huge calculation power. Therefore, in order to restore the surface of the real object as much as possible, the three-dimensional rendering efficiency and performance are improved mainly by using methods of improving hardware performance, optimizing algorithms and the like, and the three-dimensional rendering with higher quality requires more time and has higher requirements on hardware performance and the like.
Based on this, the embodiment of the present application provides a rendering method of a three-dimensional model, including: the method comprises the steps of obtaining a three-dimensional model needing to be rendered on an interface and a first person visual angle of the interface, determining a visible area and an invisible area of the three-dimensional model according to the first person visual angle, wherein the visible area can be seen when a user observes the interface by adopting the first person visual angle, and the invisible area cannot be seen when the user observes the interface by adopting the first person visual angle, so that when the three-dimensional model is rendered, rendering of first quality is performed on the visible area, rendering of second quality is performed on the invisible area, and the first quality is larger than the second quality. Therefore, for the invisible area of the three-dimensional model observed by the first person visual angle, the rendering is executed by the quality of the visible area lower than that of the three-dimensional model, namely, the rendering is executed without the quality equal to that of the visible area, so that the rendering speed is improved, the rendering time of the three-dimensional model is reduced, the rendering efficiency is improved under the condition of the same hardware technology or on the premise of not changing the rendering quality of the three-dimensional model observed by the user, and the experience of the user is improved.
It should be noted that the rendering method and the related device of the three-dimensional model provided by the invention can be applied to the fields of artificial intelligence, block chain, distribution, cloud computing, big data, internet of things, mobile internet, network security, chip, virtual reality, augmented reality, holography, quantum computing, quantum communication, quantum measurement, digital twinning or finance. The above description is only an example, and does not limit the application fields of the rendering method of the three-dimensional model and the related device provided by the present invention.
A method for rendering a three-dimensional model according to an embodiment of the present application is described below with reference to fig. 1. Referring to fig. 1, which is a flowchart of a rendering method of a three-dimensional model provided in an embodiment of the present application, the method may include S101-S103.
S101: and acquiring a three-dimensional model required by the interface and a first-person visual angle of the interface.
The First-person Shooting game (FPS) adopts the visual angle which accords with the visual reference of human eyes to express the spatial distance feeling, and can also easily simulate the performances such as speed feeling by adding a lens special effect in a picture. Lens wobbling may also be added to simulate a more natural motion perspective.
S102: and determining a visible area and an invisible area of the three-dimensional model according to the first person viewing angle.
For the same interface, the details of the three-dimensional model in the interface are different from the first-person perspective, e.g., the details of the three-dimensional model are different from the front-view and top-view interfaces. That is, the regions of the three-dimensional model that are viewed from different first-person perspectives are different for the three-dimensional model, and the visible region and the invisible region will be described below.
The visible region of the three-dimensional model is a region which can be seen when the interface is observed by adopting the first person visual angle, and the invisible region of the three-dimensional model is a region which cannot be seen when the interface is observed by adopting the first person visual angle.
As a possible implementation, the invisible area may be an occluded area, or an area having a distance greater than the first distance. The following description will be made separately.
The first method comprises the following steps: an occluded area.
According to the position relation among the submodels in the three-dimensional model, which submodels and which parts of which submodels can be shielded by other submodels can be determined, and the shielded areas are invisible areas for users.
And the second method comprises the following steps: a region of greater distance than the first distance.
It will be appreciated that a spatial coordinate system (xyz coordinate system) may be established in the interface, the z-axis representing the depth of the object in the interface, the greater the depth, the further the object is from the user, the greater the probability that the object is not visible. Based on this, the person skilled in the art can set the first distance according to the actual need.
For example, a point closest to the user in the three-dimensional model of the interface is used as an origin of the space coordinate system to establish the space coordinate system, the submodel with the larger absolute value of the z-axis is farther from the user, if the first distance is 100, and if the submodel is located at-200 of the z-axis, the distance is 200, and the distance is greater than the first distance, the submodel belongs to the invisible area.
S103: and performing rendering of a first quality on the visible area, and performing rendering of a second quality on the invisible area to obtain a rendered three-dimensional model.
After the visible region and the invisible region are determined, the three-dimensional model can be rendered with different qualities, specifically, rendering with a first quality is performed on the visible region, and rendering with a second quality is performed on the invisible region, wherein the first quality is greater than the second quality. That is, high quality rendering is performed on visible regions and low quality rendering is performed on invisible regions, and as one possible implementation, no rendering is performed on invisible regions.
Therefore, on the premise that the rendering quality of the three-dimensional model observed by the user is not changed, the required rendering quality is adopted to render the visible region, the invisible region is rendered in low quality or not rendered, the rendering time can be shortened, the rendering efficiency is improved, and the hardware performance, the optimization algorithm and the like are not required to be improved. Furthermore, the saved time can be rendered with higher quality to the visible area, so that the rendering quality of the three-dimensional model observed by the user is higher under the condition of the same rendering time. The rendering quality of the visible area is optimized, a better quality effect and shorter rendering time are met, and the performance cost is saved. By finding a balance point of performance consumption and visual effect, the maximum display effect is brought by limited performance, and a foundation is established for high-definition quality model display.
As a possible implementation, the visible region may be further subdivided, and different quality rendering may be performed on visible regions of different degrees. The following description will take as an example the subdivision of the visible area into two areas according to distance.
According to the first person perspective, a visible region with the distance larger than a second distance threshold is determined as a first visible sub-region, the visible region with the distance smaller than or equal to the second distance threshold is determined as a second visible sub-region, and for a user, the first visible sub-region is far and the second visible sub-region is near, so that three-dimensional rendering with third quality is performed on the first visible sub-region, and three-dimensional rendering with first quality is performed on the second visible sub-region. Wherein the third mass is less than the first mass and the third mass is greater than the second mass.
It should be noted that, regardless of the first visible sub-area or the second visible sub-area, the invisible area determined according to the distance is closer to the user than the aforementioned second invisible area determined according to the distance. That is, if the coordinate systems are consistent, the second distance threshold should be less than the first distance threshold.
For the related parts of this embodiment, reference is made to the foregoing description, and details are not repeated herein.
As a possible implementation, when the first-person perspective changes or the interface changes, S101-S103 may be performed again.
As a possible implementation manner, if the three-dimensional model of the interface is not changed, only the first person perspective is changed, the change range of the first person perspective is predicted, according to the change range, an undetermined visible region and an undetermined invisible region of the three-dimensional model are determined, rendering of the undetermined visible region with first quality is performed, rendering of the undetermined invisible region with second quality is performed, and the rendered undetermined three-dimensional model is obtained. Therefore, the change range of the first person visual angle can be predicted, the three-dimensional model is rendered in advance according to the change range, when the first person visual angle really changes, the corresponding undetermined three-dimensional model is directly displayed, and the experience of a user is improved by rendering in advance.
For example, when the first person viewing angle is predicted to be changed from the front view to the top view or the bottom view, the pending three-dimensional model corresponding to the bottom view and the pending three-dimensional model corresponding to the top view are rendered in advance according to the above manner, and when the first person viewing angle is changed from the front view to the top view, the pending three-dimensional model corresponding to the top view is directly displayed.
It should be noted that, when the three-dimensional model included in the interface is a static model, and/or the number of the sub-models in the three-dimensional model included in the interface is greater than the number threshold, the rendering effect obtained by using the above method is better.
Specifically, when the three-dimensional model is a static model, for three-dimensional rendering in the related art, the whole static model needs to be rendered, and the method provided by the embodiment of the application does not need to render an area where the first-person viewing angle is invisible, so that the rendering area is reduced, the rendering time is shortened, and the rendering efficiency is improved. For example, a three-dimensional model including 100 ten thousand surfaces is close to the object, and the related art needs to render all 100 ten thousand surfaces, even the back surface which cannot be seen at all. Similarly, when the number of the sub-models in the three-dimensional model is larger than the number threshold, the area which does not need to be rendered by adopting the technical scheme provided by the application can be more, and the rendering efficiency is further improved. The size of the number threshold is not specifically limited in the embodiment of the present application, and those skilled in the art can set the number threshold according to actual needs.
According to the technical scheme, the three-dimensional model needing to be rendered on the interface and the first person visual angle of the interface are obtained, the visible area and the invisible area of the three-dimensional model are determined according to the first person visual angle, the visible area can be seen when the user observes the interface by adopting the first person visual angle, and the invisible area cannot be seen when the user observes the interface by adopting the first person visual angle, so that when the three-dimensional model is rendered, rendering of first quality is performed on the visible area, rendering of second quality is performed on the invisible area, and the first quality is larger than the second quality. Therefore, for the invisible area of the three-dimensional model observed by the first person visual angle, the rendering is executed by adopting the quality lower than that of the visible area of the three-dimensional model, namely, the rendering is executed without adopting the quality equal to that of the visible area, the rendering speed is improved, the rendering time of the three-dimensional model is reduced, and the rendering efficiency is improved under the condition of the same hardware technology.
In addition to the method for rendering a three-dimensional model provided in the embodiment of the present application, a device for rendering a three-dimensional model is also provided, as shown in fig. 2, including: an acquisition unit 201, a determination unit 202, and a rendering unit 203;
the acquiring unit 201 is configured to acquire a three-dimensional model required by an interface and a first person viewing angle of the interface;
the determining unit 202 is configured to determine a visible region and an invisible region of the three-dimensional model according to the first-person perspective;
the rendering unit 203 is configured to perform rendering of a first quality on the visible region, and perform rendering of a second quality on the invisible region to obtain a rendered three-dimensional model; wherein the first mass is greater than the second mass.
As a possible implementation manner, the rendering unit 203 is configured to:
no rendering is performed on the invisible area.
As a possible implementation manner, the determining unit 202 is configured to:
and according to the first person perspective, determining an occluded area and/or an area with a distance larger than a first distance in the three-dimensional model as an invisible area, and determining an area except the invisible area in the three-dimensional model as a visible area.
As a possible implementation manner, the rendering unit 203 is configured to:
according to the first person perspective, determining the visible region with the distance larger than a second distance threshold value as a first visible subregion, and determining the visible region with the distance smaller than or equal to the second distance threshold value as a second visible subregion;
performing a three-dimensional rendering of a third quality on the first visible subregion, performing a three-dimensional rendering of the first quality on the second visible subregion; wherein the third mass is less than the first mass and the third mass is greater than the second mass.
As a possible implementation manner, the apparatus further includes a pre-execution unit, configured to:
predicting a variation range of a first-person perspective of the interface;
determining an undetermined visible region and an undetermined invisible region of the three-dimensional model according to the variation range;
and performing rendering of a first quality on the to-be-determined visible region, and performing rendering of a second quality on the to-be-determined invisible region to obtain a rendered to-be-determined three-dimensional model.
As a possible implementation manner, the three-dimensional model is a static model and/or the number of sub-models in the three-dimensional model is greater than a number threshold.
The three-dimensional model rendering device provided by the embodiment of the application is used for obtaining a three-dimensional model of which an interface needs to be rendered and a first person visual angle of the interface, determining a visible area and an invisible area of the three-dimensional model according to the first person visual angle, wherein the visible area is an area which can be seen when a user adopts the first person visual angle to observe the interface, and the invisible area is an area which cannot be seen when the user adopts the first person visual angle to observe the interface, so that when the three-dimensional model is rendered, rendering of first quality is executed on the visible area, rendering of second quality is executed on the invisible area, and the first quality is larger than the second quality. Therefore, for the invisible area of the three-dimensional model observed by the first person visual angle, the rendering is executed by adopting the quality lower than that of the visible area of the three-dimensional model, namely, the rendering is executed without adopting the quality equal to that of the visible area, the rendering speed is improved, the rendering time of the three-dimensional model is reduced, and the rendering efficiency is improved under the condition of the same hardware technology.
An embodiment of the present application further provides a computer device, referring to fig. 3, which shows a structural diagram of a computer device provided in an embodiment of the present application, and as shown in fig. 3, the device includes a processor 310 and a memory 320:
the memory 310 is used for storing program codes and transmitting the program codes to the processor;
the processor 320 is configured to execute any one of the rendering methods of the three-dimensional model provided in the above embodiments according to the instructions in the program code.
The embodiment of the application provides a computer-readable storage medium, which is used for storing a computer program, and the computer program is used for executing any one of the rendering methods of the three-dimensional model provided by the embodiment.
Embodiments of the present application also provide a computer program product or computer program comprising computer instructions stored in a computer-readable storage medium. A processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the computer device to perform the method of rendering a three-dimensional model provided in the various alternative implementations of the above aspects.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present application can further combine to provide more implementations on the basis of the implementations provided by the above aspects. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points. The above-described apparatus embodiments are merely illustrative, and the units and modules described as separate components may or may not be physically separate. In addition, some or all of the units and modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (10)
1. A method of rendering a three-dimensional model, the method comprising:
acquiring a three-dimensional model required by an interface and a first person viewing angle of the interface;
determining a visible region and an invisible region of the three-dimensional model according to the first person perspective;
performing rendering of a first quality on the visible area, and performing rendering of a second quality on the invisible area to obtain a rendered three-dimensional model; wherein the first mass is greater than the second mass.
2. The method of claim 1, wherein the performing a second quality rendering of the invisible region comprises:
no rendering is performed on the invisible area.
3. The method of claim 1, wherein determining visible and invisible regions of the three-dimensional model from the first human perspective comprises:
and according to the first person perspective, determining an occluded area and/or an area with a distance larger than a first distance in the three-dimensional model as an invisible area, and determining an area except the invisible area in the three-dimensional model as a visible area.
4. The method of claim 1, wherein the performing a three-dimensional rendering of the visible region of a first quality comprises:
according to the first person perspective, determining the visible region with the distance larger than a second distance threshold value as a first visible subregion, and determining the visible region with the distance smaller than or equal to the second distance threshold value as a second visible subregion;
performing a three-dimensional rendering of a third quality on the first visible subregion, performing a three-dimensional rendering of the first quality on the second visible subregion; wherein the third mass is less than the first mass and the third mass is greater than the second mass.
5. The method of claim 1, further comprising:
predicting a variation range of a first-person perspective of the interface;
determining an undetermined visible region and an undetermined invisible region of the three-dimensional model according to the variation range;
and performing rendering of a first quality on the to-be-determined visible region, and performing rendering of a second quality on the to-be-determined invisible region to obtain a rendered to-be-determined three-dimensional model.
6. The method of any one of claims 1-5, wherein the three-dimensional model is a static model and/or the number of sub-models in the three-dimensional model is greater than a number threshold.
7. An apparatus for rendering a three-dimensional model, the apparatus comprising: the device comprises an acquisition unit, a determination unit and a rendering unit;
the acquisition unit is used for acquiring a three-dimensional model required by an interface and a first person viewing angle of the interface;
the determining unit is used for determining a visible area and an invisible area of the three-dimensional model according to the first person perspective;
the rendering unit is used for performing rendering of a first quality on the visible area and performing rendering of a second quality on the invisible area to obtain a rendered three-dimensional model; wherein the first mass is greater than the second mass.
8. A computer device, the device comprising a processor and a memory:
the memory is used for storing program codes and transmitting the program codes to the processor;
the processor is configured to perform the method of any of claims 1-6 according to instructions in the program code.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium is used to store a computer program for performing the method of any of claims 1-6.
10. A computer program product comprising a computer program or instructions; the computer program or instructions, when executed by a processor, perform the method of any of claims 1-6.
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| WO2022194309A1 (en) * | 2021-03-15 | 2022-09-22 | 上海交通大学 | Three-dimensional point cloud transmission method and apparatus, three-dimensional point cloud receiving method and apparatus, and storage medium |
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| CN112541960A (en) * | 2019-09-19 | 2021-03-23 | 阿里巴巴集团控股有限公司 | Three-dimensional scene rendering method and device and electronic equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022194309A1 (en) * | 2021-03-15 | 2022-09-22 | 上海交通大学 | Three-dimensional point cloud transmission method and apparatus, three-dimensional point cloud receiving method and apparatus, and storage medium |
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