WO2023193639A1

WO2023193639A1 - Image rendering method and apparatus, readable medium and electronic device

Info

Publication number: WO2023193639A1
Application number: PCT/CN2023/084542
Authority: WO
Inventors: 金祎
Original assignee: 北京字跳网络技术有限公司
Priority date: 2022-04-07
Filing date: 2023-03-28
Publication date: 2023-10-12
Also published as: CN114742934A

Abstract

The present disclosure relates to an image rendering method and apparatus, a readable medium, an electronic device, a computer program product, and a computer program. The method comprises: acquiring a scene image to be rendered in a target scene; in respect of each pixel point in the scene image, determining a target shadow height corresponding to the pixel point, determining a shadow value corresponding to the pixel point according to the target shadow height, and, according to the shadow value, rendering the pixel point so as to render the scene image. The target shadow height is the height of a specified pixel point in the shadow of the scene image, the specified pixel point being a pixel point having a same position with the pixel point in the horizontal direction of a world space corresponding to the target scene, and having a height in the height direction of the world space greater than or equal to a preset height threshold. That is to say, the present disclosure can determine the shadow value of the pixel point according to the target shadow height corresponding to the pixel point, and can render the pixel point according to the shadow value, so that during a rendering process, the amount of data required to be processed is small, thereby improving the image rendering efficiency.

Description

Image rendering methods, devices, readable media and electronic equipment

Cross-references to related applications

This application claims priority to the Chinese patent application with application number 202210363937. Enter this article.

Technical field

The present disclosure relates to the technical field of image processing, and specifically, to an image rendering method, device, readable medium, electronic equipment, computer program product, and computer program.

Background technique

With the continuous development of the game industry, users have higher and higher requirements for picture performance. In order to enhance the display effect of the game, related real-time shadow technology is usually used to render shadows for moving game objects in the scene.

In related technologies, a depth map of the scene is first rendered at the light source position, and then the entire scene is rendered at the camera, and compared with the previously rendered depth map to obtain the shadow effect of the scene. However, when there are many distant objects, the amount of data that needs to be processed for two scene renderings is relatively large, resulting in relatively low rendering efficiency.

Contents of the invention

This Summary is provided to introduce in a simplified form concepts that are further described in the Detailed Description. This Summary is not intended to identify key features or essential features of the claimed technical solution, nor is it intended to be used to limit the scope of the claimed technical solution.

In a first aspect, the present disclosure provides an image rendering method, which method includes:

Get the scene image to be rendered in the target scene;

For each pixel in the scene image, determine the target shadow height corresponding to the pixel, determine the shadow value corresponding to the pixel according to the target shadow height, and determine the shadow value according to the shadow value. Render pixels to render the scene image;

Wherein, the target shadow height is the height of a designated pixel point in the shadow of the scene image, and the designated pixel point is at the same position as the pixel point in the horizontal direction of the world space corresponding to the target scene, And the height of the pixels in the height direction of the world space is greater than or equal to the preset height threshold.

In a second aspect, the present disclosure provides an image rendering device, which includes:

The image acquisition module is used to obtain the scene image to be rendered in the target scene;

An image rendering module, configured to determine, for each pixel in the scene image, a target shadow height corresponding to the pixel, and determine a shadow value corresponding to the pixel according to the target shadow height. Shadow values are used to render the pixels to render the scene image;

In a third aspect, the present disclosure provides a computer-readable medium having a computer program stored thereon, and when the computer program is executed by a processing device, the steps of the method described in the first aspect of the present disclosure are implemented.

In a fourth aspect, the present disclosure provides electronic equipment, including:

a storage device having a computer program stored thereon;

A processing device, configured to execute the computer program in the storage device to implement the steps of the method described in the first aspect of the present disclosure.

In a fifth aspect, the present disclosure provides a computer program product, which includes a computer program. When the computer program is executed by a processing device, the steps of the method described in the first aspect of the present disclosure are implemented.

In a sixth aspect, the present disclosure provides a computer program. When the computer program is executed by a processing device, the steps of the method described in the first aspect of the present disclosure are implemented.

Other features and advantages of the present disclosure will be described in detail in the detailed description that follows.

Description of the drawings

The above and other features, advantages, and aspects of various embodiments of the present disclosure will become more apparent with reference to the following detailed description taken in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements. It is to be understood that the drawings are schematic and that elements and elements are not necessarily drawn to scale. In the attached picture:

FIG. 1 is a flowchart of an image rendering method according to an exemplary embodiment of the present disclosure.

FIG. 2 is a schematic diagram of a target shadow height according to an exemplary embodiment of the present disclosure.

FIG. 3 is a flowchart of another image rendering method according to an exemplary embodiment of the present disclosure.

Figure 4 is a schematic diagram of a shadow height according to an exemplary embodiment of the present disclosure.

FIG. 5 is a block diagram of an image rendering device according to an exemplary embodiment of the present disclosure.

FIG. 6 is a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.

Detailed ways

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, which rather are provided for A more thorough and complete understanding of this disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of the present disclosure.

It should be understood that various steps described in the method implementations of the present disclosure may be executed in different orders and/or in parallel. Furthermore, method embodiments may include additional steps and/or omit performance of illustrated steps. The scope of the present disclosure is not limited in this regard.

As used herein, the term "include" and its variations are open-ended, ie, "including but not limited to." The term "based on" means "based at least in part on." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; and the term "some embodiments" means "at least some embodiments". Relevant definitions of other terms will be given in the description below.

It should be noted that concepts such as “first” and “second” mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units. Or interdependence.

It should be noted that the modifications of "one" and "plurality" mentioned in this disclosure are illustrative and not restrictive. Those skilled in the art will understand that unless the context clearly indicates otherwise, it should be understood as "one or Multiple”.

The names of messages or information exchanged between multiple devices in the embodiments of the present disclosure are for illustrative purposes only and are not used to limit the scope of these messages or information.

It can be understood that before using the technical solutions disclosed in the embodiments of this disclosure, users should be informed of the type, scope of use, usage scenarios, etc. of the personal information involved in this disclosure in an appropriate manner in accordance with relevant laws and regulations and obtain the user's authorization. .

For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested will require the acquisition and use of the user's personal information. Therefore, users can autonomously choose whether to provide personal information to software or hardware such as electronic devices, applications, servers or storage media that perform the operations of the technical solution of the present disclosure based on the prompt information.

As an optional but non-limiting implementation method, in response to receiving the user's active request, the method of sending prompt information to the user may be, for example, a pop-up window, and the prompt information may be presented in the form of text in the pop-up window. In addition, the pop-up window can also contain a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

It can be understood that the above process of notifying and obtaining user authorization is only illustrative and does not limit the implementation of the present disclosure. Other methods that satisfy relevant laws and regulations can also be applied to the implementation of the present disclosure.

At the same time, it can be understood that the data involved in this technical solution (including but not limited to the data itself, the acquisition or use of the data) should comply with the requirements of corresponding laws, regulations and relevant regulations.

First, the application scenarios of the present disclosure will be described. The current mobile perspective shadow solutions include Cascade Shadow Map algorithm, baked shadows, contact shadows, etc. Among them, the Cascade Shadow Map algorithm is equivalent to rendering the scene twice during the processing process, and the corresponding Drawcall (drawing initiation) data volume will be relatively large, resulting in CPU (Central Processing Unit, Central Processing Unit) and GPU (Graphics Processing Unit) , graphics processor) is also relatively large, which affects the rendering efficiency. The baking speed of baked shadows is relatively slow, and the rendering effect of contact shadows is relatively poor.

In order to solve the above existing problems, the present disclosure provides an image rendering method, device, readable medium and electronic equipment, which can determine the shadow value of the pixel point according to the target shadow height corresponding to the pixel point, and then determine the shadow value of the pixel point according to the shadow value. Rendering is performed so that the amount of data that needs to be processed during the rendering process is relatively small, thereby improving the efficiency of image rendering.

The present disclosure will be described below with reference to specific embodiments.

Figure 1 is a flow chart of an image rendering method according to an exemplary embodiment of the present disclosure. As shown in Figure 1, the method may include:

S101. Obtain the scene image to be rendered in the target scene.

The target scene may be a game scene, and the scene image may be an image that needs to be rendered in the game scene.

S102. For each pixel in the scene image, determine the target shadow height corresponding to the pixel, determine the shadow value corresponding to the pixel based on the target shadow height, and render the pixel based on the shadow value. , to render the scene image.

Wherein, the target shadow height is the height of the specified pixel in the shadow of the scene image, the specified pixel is the same as the horizontal position of the pixel in the world space corresponding to the target scene, and is in the world space height square Pixels whose upward height is greater than or equal to the preset height threshold. The preset height threshold may be the height corresponding to the pixel that has the same position in the height direction of the world space and the highest position in the horizontal direction of the world space. Figure 2 is a schematic diagram of a target shadow height according to an exemplary embodiment of the present disclosure. As shown in Figure 2, the terrain in the scene image is rendered from a top-down perspective. The target shadow height can be the world The intersection point of the straight line in the height direction of space and the straight line in the direction of the light source.

In this step, for each pixel in the scene image, you can first determine the designated pixel corresponding to the pixel, determine the height of the designated pixel, and use the height of the designated pixel as the height corresponding to the pixel. Target shadow height.

Further, after obtaining the target shadow height corresponding to the pixel, the coordinates of the world space corresponding to the pixel can be obtained, and the shadow value corresponding to the pixel can be calculated through the following formula:
Shadow＝saturate(exp(MaxOcclusionHeight–C*positionWS.y)) (1)

Among them, Shadow is the shadow value, MaxOcclusionHeight is the target shadow height, positionWS.y is the y-axis of the coordinates of the world space corresponding to the pixel point, C is a preset constant, and C can be pre-tested based on experiments. For example, C can be 20. The function of the Saturate(x) function is to return 0 when the value of x is less than or equal to 0, to return 1 when the value of x is greater than or equal to 1, and to return 1 when the value of x is between 0 and 1. If the value is between , x is returned. When the shadow value corresponding to the pixel is 0, it means that the pixel is not in shadow. When the shadow value corresponding to the pixel is 1, it means that the pixel is in shadow, and the color of the shadow is the darkest. , when the shadow value corresponding to the pixel is between 0 and 1, the corresponding shadow color can be rendered according to the size of the shadow value. For example, the larger the shadow value, the darker the color. The shadow value The smaller it is, the lighter the color can be.

After obtaining the shadow value corresponding to the pixel, the pixel can be rendered by referring to the rendering method in the prior art, which will not be described again here.

Using the above method, the shadow value of the pixel can be determined according to the target shadow height corresponding to the pixel, and the pixel can be rendered according to the shadow value. In this way, the amount of data that needs to be processed during the rendering process is relatively small, thereby improving image rendering. s efficiency.

Figure 3 is a flowchart of another image rendering method according to an exemplary embodiment of the present disclosure. As shown in Figure 3, the method may include:

S301. Obtain the scene image to be rendered in the target scene.

S302. For each pixel in the scene image, determine the texture coordinates corresponding to the pixel.

In a possible implementation, for each pixel in the scene image, the coordinates of the world space corresponding to the pixel, the pixel size corresponding to the height texture, and the proportion of the world space can be obtained to determine the corresponding coordinates of the scene image. The offset value between the center point of the terrain and the origin of the coordinates of the world space corresponding to the pixel point, and the pixel is determined based on the coordinates of the world space corresponding to the pixel point, the offset value, the scale and the pixel size. The texture coordinates corresponding to the point. The coordinates of the world space corresponding to the pixel point and the pixel size corresponding to the height texture can be obtained through existing techniques, and will not be described again here. The world space ratio corresponding to the height texture can be preset according to the scene image. For example, if the pixel occupies 1m*1m world space, the ratio can be 1. The smaller the ratio, the smaller the pixel in the scene image. The greater the density, the better the rendering effect.

For example, the texture coordinates corresponding to the pixel can be calculated by the following formula:
cellU＝(positionWS.x-HeightOcclusionStartPoint)*TexelsPerMeter*
HeightOcclusionTex_TexelSize (2)
cellV＝(positionWS.z-HeightOcclusionStartPoint)*TexelsPerMeter*
HeightOcclusionTex_TexelSize (3)

Among them, (cellU, cellV) is the texture coordinate corresponding to the pixel point, positionWS.x is the x-axis of the coordinates of the pixel point corresponding to the world space, positionWS.z is the z-axis of the coordinates of the pixel point corresponding to the world space, and HeightOcclusionStartPoint is The offset value, TexelsPerMeter is the proportion of the world space corresponding to the pixel, and HeightOcclusionTex_TexelSize is the pixel size corresponding to the height texture. The pixel size can be a quaternion, and the pixel size can be represented by a four-dimensional vector. For example, The four-dimensional vector can be Vector4(1/width, 1/height, width, height).

S303. For each pixel in the scene image, determine the designated pixel according to the texture coordinates of the pixel and the pre-obtained height texture corresponding to the scene image.

The height texture may include a shadow height corresponding to each pixel of the scene image.

In this step, for each pixel in the scene image, after obtaining the texture coordinates of the pixel, the height texture can be obtained, and based on the texture coordinates of the pixel, it is determined whether the height texture is the same as the pixel. Specified pixels corresponding to the target scene have the same position in the horizontal direction of the world space and have a height greater than or equal to the preset height threshold in the height direction of the world space.

The height texture can be obtained in advance in the following way: for each pixel in the scene image, determine the scene depth of the pixel in the direction of the light source in the scene image, and determine the scene depth corresponding to the pixel based on the scene depth. Shadow height, and a set of shadow heights corresponding to multiple pixels is used as the height texture.

For each pixel in the scene image, you can refer to the implementation of the ShadowMap algorithm to determine the scene depth of the pixel in the direction of the light source in the scene image. Further, for each pixel in the scene image, after determining the scene depth of the pixel in the direction of the light source in the scene image, the terrain height corresponding to the pixel can be determined. After determining the position corresponding to the terrain height When in the shadow of the scene image, a preset height interval is obtained, and the shadow height corresponding to the pixel is determined based on the terrain height and the preset height interval. The terrain height may be the height of a reference plane located directly below the pixel in the height direction of the world space coordinate in the scene image. As shown in Figure 3, the reference plane may be the ground or the highest point of a tree. The plane on which it is located, the terrain height can be obtained in advance based on the terrain in the scene image. The preset height interval can be pre-tested based on the scene image. The smaller the preset height interval, the higher the accuracy of determining the shadow height. However, due to the relatively large amount of calculation, the performance will be poor. For scenarios with relatively high accuracy requirements and low performance requirements, you can set a smaller preset height interval. For example, the preset height interval can be 5m. For scenarios with relatively low accuracy requirements and high performance requirements, A larger preset height interval can be set. For example, the preset height interval can be 7m. The present disclosure does not limit the setting method of the preset height interval.

In a possible implementation, when it is determined that the position corresponding to the terrain height is in the shadow of the scene image, the terrain height can be used as the undetermined height, and the shadow height determination step is executed in a loop until a new undetermined height is determined. If the position corresponding to the height is not in the shadow of the scene image, the difference between the new undetermined height and the preset height interval is used as the shadow height corresponding to the pixel. Wherein, the step of determining the shadow height includes: determining whether the position corresponding to the undetermined height is in the shadow according to the scene depth, and if the position corresponding to the undetermined height is in the shadow, spacing the undetermined height from the preset height The sum value is used as the new pending height.

For example, according to the scene depth corresponding to the pixel point, it can be determined whether the position corresponding to the undetermined height is in the shadow of the scene image. Continuing to illustrate with Figure 2 as an example, it can be seen from Figure 2 that the terrain height h is in in the shadow, here In this case, you can first determine whether the position corresponding to h+5 (the default height interval is 5m) is in shadow. If the position corresponding to h+5 is in shadow, continue to determine whether the position corresponding to h+10 is in shadow. , and by analogy, if it is finally determined that the position corresponding to h+30 is not in the shadow, then h+25 is determined to be the shadow height.

Table 1 lists the shadow heights corresponding to multiple pixels in the scene image. As shown in Table 1, the shadow heights corresponding to the pixels in the scene image include 0, 25, 30, and 35. It should be noted that the table The shadow height shown in 1 is only the shadow height corresponding to some pixels in the scene image.

Table 1

It should be noted that the present disclosure can obtain the shadow height corresponding to each pixel point in the scene image in advance, or can obtain the shadow height corresponding to each pixel point in the scene image in real time, and the present disclosure is not limited to this. Compared with the method of obtaining the shadow height in real time, obtaining the shadow height in advance can reduce the performance overhead during image rendering and further improve rendering efficiency.

After obtaining the shadow height corresponding to each pixel in the scene image, the shadow height corresponding to the pixel can be filtered for each pixel in the scene image, and the filtered shadow height is composed of A collection of textures that serve as that height. In this way, the shadow height can be blurred once, making the overall edge of the shadow rendering softer and achieving a soft shadow effect.

For example, the ESM algorithm in Logarithmic Space Filtering can be used to filter the shadow height corresponding to each pixel. For example, taking the shadow height corresponding to any pixel in the scene image as an example, Among them, the filtering formula can be:

Among them, d is the filtered shadow height corresponding to the current pixel in the scene image, d ₀ is the shadow height corresponding to the current pixel, and d _i is the shadow height corresponding to the i-th pixel around the current pixel. , N is 8, w ₀ is the weight value corresponding to the current pixel, w _i is the weight value corresponding to the i-th pixel, c is a preset constant, which can be obtained through pre-testing based on experiments, for example, c is 20. The weight value corresponding to each pixel can be predetermined according to the filtering method. For example, if the filtering method is 3*3 BOX filtering, then the weight value corresponding to each pixel is the same, both 1/9. If the filtering method is Gaussian filtering, the weight value corresponding to each pixel is different.

Regarding the shadow height of the pixel corresponding to the scene image shown in Table 1, if the current pixel in the scene image is the pixel in row 2 and column 6 (the pixel with black background in Table 1), the current pixel The shadow height corresponding to the point is 30, and the shadow heights (d ₁ ~ d ₈ ) corresponding to the eight pixel points around the current pixel point are 30, 30, 30, 30, 0, 0, 0, and 30 respectively.

Figure 4 is a schematic diagram of a shadow height according to an exemplary embodiment of the present disclosure. As shown in Figure 4, in terms of resolution An image of 4096*4096 in R16 format displays the shadow height corresponding to each pixel in the scene image.

S304. For each pixel in the scene image, use the shadow height corresponding to the specified pixel as the target shadow height.

S305. For each pixel in the scene image, determine the shadow value corresponding to the pixel according to the coordinates of the world space corresponding to the pixel and the target shadow height.

S306: For each pixel in the scene image, render the pixel according to the shadow value to render the scene image.

Using the above method, the target shadow height corresponding to the pixel can be determined from the pre-obtained height texture corresponding to the scene image based on the texture coordinates corresponding to the pixel in the scene image, and the shadow of the pixel can be determined based on the target shadow height. value, the pixel is rendered according to the shadow value. In this way, the amount of data that needs to be processed during the rendering process is relatively small, making the running performance relatively high, thereby improving the efficiency of image rendering, and the overhead of video memory during the rendering process is also reduced. It is relatively small and can save disk and memory space. Furthermore, the present disclosure can also perform filtering processing on the shadow height obtained in advance to achieve the effect of soft shadow.

Figure 5 is a block diagram of an image rendering device according to an exemplary embodiment of the present disclosure. As shown in Figure 5, the device may include:

The image acquisition module 501 is used to acquire the scene image to be rendered in the target scene;

The image rendering module 502 is configured to determine, for each pixel point in the scene image, the target shadow height corresponding to the pixel point, and determine the shadow value corresponding to the pixel point according to the target shadow height. Shadow values are used to render the pixels to render the scene image;

Optionally, the image rendering module 502 is also used to:

Determine the texture coordinates corresponding to the pixel;

Determine the designated pixel point according to the texture coordinates and the pre-obtained height texture corresponding to the scene image, where the height texture includes the shadow height corresponding to each pixel point of the scene image;

The shadow height corresponding to the specified pixel point is used as the target shadow height.

Optionally, the image rendering module 502 is also used to:

Obtain the coordinates of the pixel corresponding to the world space, the pixel size corresponding to the height texture, and the proportion of the world space;

Determine the offset value between the center point of the terrain corresponding to the scene image and the origin of the coordinates of the world space corresponding to the pixel point;

The texture coordinates corresponding to the pixel are determined based on the coordinates of the pixel corresponding to the world space, the ratio, the pixel size and the offset value.

Optionally, the image rendering module 502 is also used to:

For each pixel in the scene image, determine the scene depth of the pixel in the direction of the light source in the scene image, and determine the shadow height corresponding to the pixel according to the scene depth;

A set of shadow heights corresponding to multiple pixel points is used as the height texture.

Optionally, the image rendering module 502 is also used to:

Determine the terrain height corresponding to the pixel, which is the height of the scene image in the world space coordinates. The height of the reference surface directly below the pixel;

When it is determined that the position corresponding to the terrain height is in the shadow of the scene image, a preset height interval is obtained, and the shadow height corresponding to the pixel is determined based on the terrain height and the preset height interval.

Optionally, the image rendering module 502 is also used to:

Use the terrain height as the undetermined height, and loop through the shadow height determination steps until it is determined that the position corresponding to the new undetermined height is not in the shadow of the scene image, and use the difference between the new undetermined height and the preset height interval as the The height of the shadow corresponding to the pixel;

The shadow height determination steps include:

According to the depth of the scene, determine whether the position corresponding to the undetermined height is in shadow;

When the position corresponding to the undetermined height is in the shadow, the sum of the interval between the undetermined height and the preset height is used as the new undetermined height.

Optionally, the image rendering module 502 is also used to:

Filter the shadow height;

The set of the shadow heights corresponding to the plurality of pixels, as the height texture, includes:

The set of filtered shadow heights is used as the height texture.

Optionally, the image rendering module 502 is also used to:

According to the coordinates of the world space corresponding to the pixel and the height of the shadow, the shadow value corresponding to the pixel is determined.

Optionally, the scene image is a game scene image.

Through the above device, the shadow value of the pixel can be determined according to the target shadow height corresponding to the pixel, and the pixel can be rendered according to the shadow value. In this way, the amount of data that needs to be processed during the rendering process is relatively small, thereby improving image rendering. s efficiency.

Regarding the devices in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

Referring now to FIG. 6 , a schematic structural diagram of an electronic device (such as a terminal device or a server) 600 suitable for implementing embodiments of the present disclosure is shown. Terminal devices in the embodiments of the present disclosure may include, but are not limited to, mobile phones, notebook computers, digital broadcast receivers, PDA (Personal Digital Assistant, personal digital assistant), PAD (tablet computer), PMP (Portable Media Player, portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. The electronic device shown in FIG. 6 is only an example and should not impose any limitations on the functions and scope of use of the embodiments of the present disclosure.

As shown in Figure 6, the electronic device 600 may include a processing device (such as a central processing unit, a graphics processor, etc.) 601, which may process data according to a program stored in a read-only memory (Read Only Memory, ROM) 602 or from a storage device 608 The program loaded into the random access memory (Random Access Memory, RAM) 603 performs various appropriate actions and processing. In the RAM 603, various programs and data required for the operation of the electronic device 600 are also stored. The processing device 601, ROM 602 and RAM 603 are connected to each other via a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.

Generally, the following devices can be connected to the I/O interface 605: input devices 606 including, for example, a touch screen, touch pad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, etc.; including, for example, a Liquid Crystal Display (LCD) , an output device 607 such as a speaker, a vibrator, etc.; a storage device 608 including a magnetic tape, a hard disk, etc.; and a communication device 609. The communication device 609 may allow the electronic device 600 to communicate wirelessly or wiredly with other devices to exchange data. according to. Although FIG. 6 illustrates electronic device 600 with various means, it should be understood that implementation or availability of all illustrated means is not required. More or fewer means may alternatively be implemented or provided.

In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product including a computer program carried on a non-transitory computer-readable medium, the computer program containing program code for performing the method illustrated in the flowchart. In such embodiments, the computer program may be downloaded and installed from the network via communication device 609, or from storage device 608, or from ROM 602. When the computer program is executed by the processing device 601, the above functions defined in the method of the embodiment of the present disclosure are performed.

It should be noted that the computer-readable medium mentioned above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium, or any combination of the above two. The computer-readable storage medium may be, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus or device, or any combination thereof. More specific examples of computer readable storage media may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard drive, random access memory (RAM), read only memory (ROM), removable Programmed read-only memory (EPROM or flash memory), fiber optics, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above. In this disclosure, a computer-readable storage medium may be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code therein. Such propagated data signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device . Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wire, optical cable, RF (radio frequency), etc., or any suitable combination of the above.

In some embodiments, the client and server can communicate using any currently known or future developed network protocol such as HTTP (HyperText Transfer Protocol), and can communicate with digital data in any form or medium. Communications (e.g., communications network) interconnections. Examples of communication networks include Local Area Networks (LANs), Wide Area Networks (WANs), the Internet (e.g., the Internet), and end-to-end networks (e.g., ad hoc end-to-end networks), as well as any current network for knowledge or future research and development.

The above-mentioned computer-readable medium may be included in the above-mentioned electronic device; it may also exist independently without being assembled into the electronic device.

The computer-readable medium carries one or more programs. When the one or more programs are executed by the electronic device, the electronic device: obtains the scene image to be rendered in the target scene; and targets each scene image in the scene image. pixel points, determine the target shadow height corresponding to the pixel point, determine the shadow value corresponding to the pixel point according to the target shadow height, and render the pixel point according to the shadow value to render the pixel point. The scene image; wherein, the target shadow height is the height of a designated pixel point in the shadow of the scene image, and the designated pixel point is the horizontal direction of the world space corresponding to the pixel point in the target scene. Pixel points with the same position and a height greater than or equal to a preset height threshold in the height direction of the world space.

Computer program code for performing the operations of the present disclosure may be written in one or more programming languages, including but not limited to object-oriented programming languages—such as Java, Smalltalk, C++, and Includes conventional procedural programming languages - such as "C" or similar programming languages. The program code can be completed Execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In situations involving remote computers, the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (such as an Internet service provider). connected via the Internet).

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operations of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, segment, or portion of code that contains one or more logic functions that implement the specified executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown one after another may actually execute substantially in parallel, or they may sometimes execute in the reverse order, depending on the functionality involved. It will also be noted that each block of the block diagram and/or flowchart illustration, and combinations of blocks in the block diagram and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or operations. , or can be implemented using a combination of specialized hardware and computer instructions.

The modules involved in the embodiments of the present disclosure can be implemented in software or hardware. Among them, the name of the module does not constitute a limitation on the module itself under certain circumstances. For example, the image acquisition module can also be described as "a module that acquires the scene image to be rendered in the target scene."

The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that can be used include: field programmable gate array (Field Programmable Gate Array, FPGA), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), application specific standard product (Application Specific Standard Product (ASSP), System on Chip (SOC), Complex Programmable Logic Device (CPLD), etc.

In the context of this disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media would include one or more wire-based electrical connections, laptop disks, hard drives, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination of the above.

According to one or more embodiments of the present disclosure, Example 1 provides an image rendering method. The method includes: obtaining a scene image to be rendered in a target scene; and determining, for each pixel point in the scene image, the The target shadow height corresponding to the pixel point is determined, and the shadow value corresponding to the pixel point is determined according to the target shadow height, and the pixel point is rendered according to the shadow value to render the scene image; wherein, The target shadow height is the height of a designated pixel in the shadow of the scene image, and the designated pixel is at the same position as the pixel in the horizontal direction of the world space corresponding to the target scene, and in Pixels whose height in the height direction of the world space is greater than or equal to a preset height threshold.

According to one or more embodiments of the present disclosure, Example 2 provides the method of Example 1. Determining the target shadow height corresponding to the pixel point includes: determining the texture coordinates corresponding to the pixel point; according to the texture coordinates and The height texture corresponding to the scene image obtained in advance determines the designated pixel point, and the height texture includes each image of the scene image. The shadow height corresponding to the pixel point; the shadow height corresponding to the specified pixel point is used as the target shadow height.

According to one or more embodiments of the present disclosure, Example 3 provides the method of Example 2. Determining the texture coordinates corresponding to the pixel point includes: obtaining the coordinates of the pixel point corresponding to the world space, the height texture corresponding to The pixel size and the proportion of the world space; determine the offset value between the center point of the terrain corresponding to the scene image and the origin of the coordinates of the world space corresponding to the pixel point; according to the corresponding coordinates of the pixel point to the world The spatial coordinates, the scale, the pixel size and the offset value determine the texture coordinates corresponding to the pixel point.

According to one or more embodiments of the present disclosure, in Example 4, the height texture is pre-acquired in the following manner: for each pixel point in the scene image, determine whether the pixel point is in the scene image The scene depth in the direction of the light source is determined, and the shadow height corresponding to the pixel point is determined according to the scene depth; a set of the shadow heights corresponding to multiple pixel points is used as the height texture.

According to one or more embodiments of the present disclosure, in Example 5, determining the shadow height corresponding to the pixel point according to the scene depth includes: determining the terrain height corresponding to the pixel point, and the terrain height is the height of the reference plane located directly below the pixel point in the height direction of the coordinates of the world space corresponding to the pixel point in the scene image; when it is determined that the position corresponding to the terrain height is located in the scene image In the case of shadow, a preset height interval is obtained, and the shadow height corresponding to the pixel is determined based on the terrain height and the preset height interval.

According to one or more embodiments of the present disclosure, in Example 6, determining the shadow height corresponding to the pixel point according to the terrain height and the preset height interval includes: using the terrain height as an undetermined height, and execute the shadow height determination step in a loop until it is determined that the position corresponding to the new undetermined height is not in the shadow of the scene image, and the difference between the new undetermined height and the preset height interval is used as the corresponding pixel point The shadow height of The sum of the height and the preset height interval is used as the new pending height.

According to one or more embodiments of the present disclosure, in Example 7, before using a set of shadow heights corresponding to a plurality of pixel points as the height texture, the method further includes: The shadow height is subjected to filtering processing; the set of the shadow heights corresponding to a plurality of the pixel points as the height texture includes: the set of the shadow heights after filtering is used as The highly textured.

According to one or more embodiments of the present disclosure, in Example 8, determining the shadow value corresponding to the pixel point according to the target shadow height includes: according to the coordinates of the pixel point corresponding to the world space and the Shadow height determines the shadow value corresponding to the pixel.

According to one or more embodiments of the present disclosure, Example 9 provides the method of any one of Examples 1-8, and the scene image is a game scene image.

According to one or more embodiments of the present disclosure, Example 10 provides an image rendering device, which includes: an image acquisition module for acquiring a scene image to be rendered in a target scene; an image rendering module for For each pixel in the scene image, determine the target shadow height corresponding to the pixel, and determine the shadow value corresponding to the pixel according to the target shadow height. According to the shadow value, calculate the shadow value for the pixel. Rendering is performed to render the scene image; wherein the target shadow height is the height of a designated pixel point in the shadow of the scene image, and the designated pixel point is corresponding to the pixel point in the target scene. The pixels have the same position in the horizontal direction of the world space and the height in the height direction of the world space is greater than or equal to the preset height threshold.

In accordance with one or more embodiments of the present disclosure, Example 11 provides a computer-readable medium having a computer-readable medium stored thereon A computer program that, when executed by a processing device, implements the steps of the method described in any one of Examples 1-9.

According to one or more embodiments of the present disclosure, Example 12 provides an electronic device, including: a storage device having a computer program stored thereon; and a processing device configured to execute the computer program in the storage device, to Implement the steps of the method described in any of Examples 1-9.

According to one or more embodiments of the present disclosure, Example 13 provides a computer program product, including a computer program that, when executed by a processing device, implements the steps of the method described in any one of Examples 1-9.

According to one or more embodiments of the present disclosure, Example 14 provides a computer program that, when executed by a processing device, implements the steps of the method described in any of Examples 1-9 of the present disclosure.

Through the above technical solution, the scene image to be rendered in the target scene is obtained; for each pixel in the scene image, the target shadow height corresponding to the pixel is determined, and based on the target shadow height, the target shadow height is determined. The shadow value corresponding to the pixel point is used to render the pixel point according to the shadow value to render the scene image; wherein the target shadow height is the height of the designated pixel point in the shadow of the scene image. , the designated pixel point is a pixel point that has the same position as the pixel point in the horizontal direction of the world space corresponding to the target scene, and has a height greater than or equal to a preset height threshold in the height direction of the world space. That is to say, the present disclosure can determine the shadow value of a pixel based on the target shadow height corresponding to the pixel, and render the pixel based on the shadow value. In this way, the amount of data that needs to be processed during the rendering process is relatively small, thereby improving the efficiency of the pixel. Image rendering efficiency.

The above description is only a description of the preferred embodiments of the present disclosure and the technical principles applied. Those skilled in the art should understand that the disclosure scope involved in the present disclosure is not limited to technical solutions composed of specific combinations of the above technical features, but should also cover solutions composed of the above technical features or without departing from the above disclosed concept. Other technical solutions formed by any combination of equivalent features. For example, a technical solution is formed by replacing the above features with technical features with similar functions disclosed in this disclosure (but not limited to).

Furthermore, although operations are depicted in a specific order, this should not be understood as requiring that these operations be performed in the specific order shown or performed in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims. Regarding the devices in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail here.

Claims

An image rendering method, the method includes:

Get the scene image to be rendered in the target scene;

For each pixel in the scene image, determine the target shadow height corresponding to the pixel, determine the shadow value corresponding to the pixel according to the target shadow height, and determine the shadow value according to the shadow value. Render pixels to render the scene image;

Wherein, the target shadow height is the height of a designated pixel point in the shadow of the scene image, and the designated pixel point is at the same position as the pixel point in the horizontal direction of the world space corresponding to the target scene, And the height of the pixels in the height direction of the world space is greater than or equal to the preset height threshold.
The method according to claim 1, wherein determining the target shadow height corresponding to the pixel point includes:

Determine the texture coordinates corresponding to the pixel;

Determine the designated pixel point according to the texture coordinates and the pre-obtained height texture corresponding to the scene image, where the height texture includes the shadow height corresponding to each pixel point of the scene image;

The shadow height corresponding to the specified pixel point is used as the target shadow height.
The method according to claim 2, wherein determining the texture coordinates corresponding to the pixel points includes:

Obtain the coordinates of the pixel corresponding to the world space, the pixel size corresponding to the height texture, and the proportion of the world space;

Determine the offset value between the center point of the terrain corresponding to the scene image and the origin of the coordinates of the world space corresponding to the pixel point;

The texture coordinates corresponding to the pixel point are determined according to the coordinates of the pixel point corresponding to the world space, the scale, the pixel size and the offset value.
The method according to claim 2 or 3, wherein the height texture is pre-obtained in the following manner:

For each pixel point in the scene image, determine the scene depth of the pixel point in the direction of the light source in the scene image, and determine the shadow height corresponding to the pixel point based on the scene depth. ;

A set of the shadow heights corresponding to a plurality of pixel points is used as the height texture.
The method according to claim 4, wherein determining the shadow height corresponding to the pixel point according to the scene depth includes:

Determine the terrain height corresponding to the pixel point, where the terrain height is the height of the reference plane located directly below the pixel point in the scene image in the height direction of the coordinates of the world space corresponding to the pixel point;

When it is determined that the position corresponding to the terrain height is in the shadow of the scene image, a preset height interval is obtained, and based on the terrain height and the preset height interval, the position corresponding to the pixel point is determined. Shadow height.
The method according to claim 5, wherein determining the shadow height corresponding to the pixel point according to the terrain height and the preset height interval includes:

The terrain height is used as the undetermined height, and the shadow height determination step is executed cyclically until it is determined that the position corresponding to the new undetermined height is not in the shadow of the scene image, and the new undetermined height is spaced from the preset height by The difference is used as the shadow height corresponding to the pixel;

The steps of determining the shadow height include:

According to the scene depth, determine whether the position corresponding to the undetermined height is in shadow;

When the position corresponding to the undetermined height is in a shadow, the sum of the interval between the undetermined height and the preset height is used as the new undetermined height.
The method according to any one of claims 4 to 6, wherein before using a set of the shadow heights corresponding to a plurality of pixel points as the height texture, the method further includes :

Filter the shadow height;

The set of the shadow heights corresponding to a plurality of pixel points, as the height texture, includes:

The set of filtered shadow heights is used as the height texture.
The method according to any one of claims 1 to 7, wherein determining the shadow value corresponding to the pixel point according to the target shadow height includes:

The shadow value corresponding to the pixel point is determined according to the coordinates of the pixel point corresponding to the world space and the target shadow height.
The method according to any one of claims 1-8, wherein the scene image is a game scene image.
An image rendering device, the device includes:

The image acquisition module is used to obtain the scene image to be rendered in the target scene;

An image rendering module, configured to determine, for each pixel in the scene image, a target shadow height corresponding to the pixel, and determine a shadow value corresponding to the pixel according to the target shadow height. Shadow values are used to render the pixels to render the scene image;

Wherein, the target shadow height is the height of a designated pixel point in the shadow of the scene image, and the designated pixel point is at the same position as the pixel point in the horizontal direction of the world space corresponding to the target scene, And the height of the pixels in the height direction of the world space is greater than or equal to the preset height threshold.
A computer-readable medium having a computer program stored thereon, which implements the steps of the method of any one of claims 1-9 when executed by a processing device.
An electronic device including:

a storage device having a computer program stored thereon;

A processing device, configured to execute the computer program in the storage device to implement the steps of the method according to any one of claims 1-9.
A computer program product comprising a computer program that implements the steps of the method according to any one of claims 1-9 when executed by a processing device.
A computer program which, when executed by a processing device, implements the steps of the method of any one of claims 1-9.