WO2022041548A1

WO2022041548A1 - Model rendering method and device

Info

Publication number: WO2022041548A1
Application number: PCT/CN2020/133862
Authority: WO
Inventors: 赵溪; 徐丹
Original assignee: 完美世界(北京)软件科技发展有限公司
Priority date: 2020-08-26
Filing date: 2020-12-04
Publication date: 2022-03-03
Also published as: CN112070873A; CN112070873B

Abstract

A model rendering method and device. Said method comprises: tracing an edge of an initial model according to a viewing direction and a normal map of the initial model to obtain a traced model, wherein the viewing direction is a direction in which a virtual camera views the initial model; rendering an ink texture to the middle part of the initial model according to a background color of the initial model and transparency in the texture map to obtain a rendered model; superposing the traced model and the rendered model to obtain an intermediate model; and mixing pixels, the transparency of which is less than a preset threshold, on the edge of the intermediate model with the color of the middle part of the intermediate model to obtain a target model. Said method solves the technical problem of poor quality of an image obtained by rendering a model in an ink style.

Description

Model rendering method and device

This disclosure claims the priority of a Chinese patent application with a priority number of 202010871727.2 and an invention titled "A MODEL RENDERING METHOD AND APPARATUS" filed with the China Patent Office on August 26, 2020, the entire contents of which are incorporated herein by reference Public.

technical field

The present disclosure relates to the field of computers, and in particular, to a model rendering method and device.

Background technique

Ink painting style is a traditional Chinese painting technique. In the field of computer graphics, there are also some works that refer to ink painting effects for stylized rendering, making the pictures unique and far-reaching. When rendering images in ink style, the current method is to divide the stroke and central area of the model into two independent pieces and add them directly. Make the central area transparent, so as not to block all models with greater depth. Using this method for ink-wash-style image rendering will have obvious problems of line interspersed during the movement of complex models, and there will also be obvious problems of jagged edges on the inner edges, resulting in poor quality of the rendered images.

For the above problems, no effective solution has been proposed yet.

SUMMARY OF THE INVENTION

The present disclosure provides a model rendering method and device, so as to at least solve the technical problem of poor image quality obtained by rendering a model in ink style in the related art.

In one aspect, an embodiment of the present disclosure provides a method for rendering a model, including:

Stroke the edge of the initial model according to the observation direction and the normal map of the initial model to obtain a stroked model, wherein the observation direction is the direction in which the virtual camera observes the initial model;

Render the ink texture to the middle of the initial model according to the background color of the initial model and the transparency in the texture map to obtain a rendered model;

superimposing the stroke model and the rendering model to obtain an intermediate model;

A target model is obtained by mixing pixels whose transparency on the edge of the intermediate model is less than a preset threshold value and the color of the middle of the intermediate model.

On the other hand, an embodiment of the present disclosure also provides a model rendering device, including:

The stroke module is set to stroke the edge of the initial model according to the observation direction and the normal map of the initial model to obtain the stroked model, wherein the observation direction is the direction in which the virtual camera observes the initial model;

A rendering module, configured to render the ink texture to the middle of the initial model according to the background color of the initial model and the transparency in the texture map, to obtain a rendering model;

an overlay module, configured to overlay the stroke model and the rendering model to obtain an intermediate model;

The mixing module is configured to mix the pixels whose transparency on the edge of the intermediate model is less than the preset threshold value and the color of the middle of the intermediate model to obtain the target model.

On the other hand, an embodiment of the present disclosure further provides a storage medium, where the storage medium includes a stored program, and the above method is executed when the program runs.

On the other hand, an embodiment of the present disclosure also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, where the processor executes the above method through the computer program.

The beneficial effects of the present disclosure include at least: using the observation direction and the normal map of the initial model to stroke the edge of the initial model to obtain a stroked model, wherein the observation direction is the direction in which the virtual camera observes the initial model; Transparency in the background color and texture map Render the ink texture to the middle of the initial model to obtain a rendering model; superimpose the stroke model and the rendering model to obtain an intermediate model; set the transparency on the edge of the intermediate model to be less than a preset threshold The pixels of the model are mixed with the middle color of the intermediate model to obtain the target model, and the edge of the model and the middle of the model are rendered separately. The texture fits the edge of the model better. For the interior of the model, the background color and the transparency parameters in the texture map are combined for rendering, so as to avoid the problem of color penetration and interspersed caused by the transparent part of the ink texture, and the edge of the model is not completely The filled pixels are mixed with the colors in the middle of the model to obtain the target model of ink style, which achieves the purpose of eliminating the inner edge jaggedness on the obtained target model of ink style, thus realizing the improvement of the ink style of the model. The technical effect of the image quality obtained after rendering, thereby solving the technical problem of poor image quality obtained after rendering the model in ink style.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. In other words, on the premise of no creative labor, other drawings can also be obtained from these drawings.

1 is a schematic diagram of a hardware environment of a model rendering method according to an embodiment of the present disclosure;

2 is a flowchart of an optional model rendering method according to an embodiment of the present disclosure;

3 is a schematic diagram of a stroke effect with different parameters according to an embodiment of the present disclosure;

4 is a schematic diagram of transparent processing in the middle of a model according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a linear blend of edge and middle according to an embodiment of the present disclosure;

6 is a schematic diagram of an optional model rendering apparatus according to an embodiment of the present disclosure;

FIG. 7 is a structural block diagram of an electronic device according to an embodiment of the present disclosure.

detailed description

In order to make those skilled in the art better understand the solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only Embodiments are part of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

It should be noted that the terms "first", "second" and the like in the description and claims of the present disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the disclosure described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

According to an aspect of the embodiments of the present disclosure, an embodiment of a method for rendering a model is provided.

Optionally, in this embodiment, the above model rendering method may be applied to the hardware environment formed by the terminal 101 and the server 103 as shown in FIG. 1 . As shown in FIG. 1 , the server 103 is connected to the terminal 101 through the network, and can be used to provide services (such as game services, application services, etc.) for the terminal or the client installed on the terminal, and a database can be set on the server or independently of the server, For providing data storage services for the server 103, the above-mentioned network includes but is not limited to: a wide area network, a metropolitan area network or a local area network, and the terminal 101 is not limited to a PC, a mobile phone, a tablet computer, and the like. The rendering method of the model in the embodiment of the present disclosure may be executed by the server 103, may also be executed by the terminal 101, or may be executed jointly by the server 103 and the terminal 101. The rendering method of the model in the embodiment of the present disclosure executed by the terminal 101 may also be executed by a client installed on the terminal 101 .

FIG. 2 is a flowchart of an optional model rendering method according to an embodiment of the present disclosure. As shown in FIG. 2 , the method may include the following steps:

Step S202, the edge of the initial model is stroked according to the observation direction and the normal map of the initial model to obtain a stroked model, wherein the observation direction is the direction in which the virtual camera observes the initial model;

Step S204, rendering the ink texture to the middle of the initial model according to the background color of the initial model and the transparency in the texture map, to obtain a rendering model;

Step S206, superimposing the stroke model and the rendering model to obtain an intermediate model;

Step S208, mixing the pixels whose transparency on the edge of the intermediate model is less than a preset threshold value and the color of the middle of the intermediate model to obtain the target model.

Through the above steps S202 to S208, the edge of the model and the middle of the model are respectively rendered, and the edge of the model is stroked according to the viewing direction and the normal map of the model, so that the texture can better fit the edge of the model , for the interior of the model, the background color and the transparency parameters in the texture map are combined for rendering to avoid the color penetration and interspersed problems caused by the transparent part of the ink texture. The colors are mixed to obtain an ink-wash-style target model, which achieves the purpose of eliminating the inner edge jaggedness on the obtained ink-wash-style target model, thereby realizing the technology of improving the image quality obtained by rendering the model in ink-wash style. effect, thereby solving the technical problem of poor image quality after rendering the model in ink style.

Optionally, in this embodiment, the above-mentioned model rendering method may be applied, but not limited to, to a scene in which a virtual model in an application is rendered in ink style. The above-mentioned applications may include, but are not limited to, any type of applications, such as game applications, educational applications, multimedia applications, instant communication applications, shopping applications, community applications, life tool applications, browser applications, and the like. The above-mentioned virtual models may include, but are not limited to, character models, animal and plant models, scene object models, prop models, architectural models, and the like.

Optionally, in this embodiment, the rendering method of the above model may be applied to, but not limited to, a shader in a rendering engine, and the shader may be designed and implemented, but not limited to, by a shader making auxiliary tool of the rendering engine. After completion, it is converted into the shader code used in the rendering engine for packaging. The above rendering engine may include, but is not limited to, the Unity engine, the Unreal engine (Unreal), and the like.

In the technical solution provided in step S202, the observation direction is the direction in which the virtual camera observes the initial model. It can be seen that the process of stroking the edge of the initial model is based on the perspective. After adding texture to the stroke calculated based on the perspective, you can Simulate just the right brush effect.

Optionally, in this embodiment, the stroke process based on the observation direction can draw strokes of appropriate thickness according to the complexity of the model, which is similar to the creative idea of many Chinese painting works. Draw with a fine pen.

Optionally, in this embodiment, the initial model is a model to be rendered in ink style (for example: character model (game character model, anime character model, etc.), landscape model (mountain, water, trees, stones, buildings, Architecture, etc.), animal image models (such as: rat, cow, tiger, rabbit, etc. effective image)).

Optionally, in this embodiment, the stroke model is a model obtained by performing an ink-and-wash stroke on the initial model, so that the edge of the stroke model presents the style of brush strokes.

In the technical solution provided in step S204, the transparency in the texture map may be, but not limited to, the value of the Alpha (transparency) channel of the texture map.

Optionally, in this embodiment, the ink texture may include, but is not limited to, textures of various ink styles, such as realistic, freehand, and meticulous painting styles. Different ink rendering styles can be achieved by adjusting the rendering parameters in the rendering process.

Optionally, in this embodiment, the rendering model is a model obtained by rendering the ink texture to the middle of the initial model, so that the middle of the rendered model presents textures in the style of realism, freehand brushwork, and fine brushwork.

In the technical solution provided in step S206, the stroke model and the rendering model are superimposed to obtain an intermediate model, the edge of the intermediate model presents brush strokes, and the middle portion presents an ink-wash style texture.

In the technical solution provided in step S208, the pixels with transparency less than the preset threshold on the edge of the intermediate model may, but are not limited to, refer to pixels whose edges of the model are not completely filled, that is, pixels whose edges are semi-transparent.

Optionally, in this embodiment, the incompletely filled pixels on the edge of the intermediate model are mixed with the color of the center of the rendered model, which can achieve the effect of a soft transition from the edge of the model to the center of the model.

Optionally, in this embodiment, the intermediate model obtained after superposition may have the phenomenon of inner edge jaggedness, and the inner edge jaggedness on the intermediate model can be eliminated by mixing the color of the edge and the middle, so that the obtained target model presents both Ink style, but also soft and excessive in color, showing a higher quality picture. The target model is a high-quality ink-and-wash model that is ultimately presented in the display.

As an optional embodiment, the edge of the initial model is stroked according to the viewing direction and the normal map of the initial model, and the obtained stroked model includes:

S11. Determine an edge degree of a pixel on the edge of the initial model according to the viewing direction and the normal map, where the edge degree is used to indicate the pixel on the edge of the initial model to the initial model The distance of the edge contour line;

S12, determine the texture data of the pixel on the edge of the initial model according to the coordinate value on the normal map;

S13, store the edge degree of the pixel on the edge of the initial model into the horizontal axis coordinate channel of the edge texture map, and store the texture data of the pixel on the edge of the initial model into the vertical axis of the edge texture map In the axis coordinate channel, get the target edge texture map;

S14, using the target edge texture map to render the edge of the initial model.

Optionally, in this embodiment, the principle of the method of calculating the stroke based on the viewing angle is briefly described as follows. When the observation direction is tangent to the model, what is observed is the edge of the model, which can be understood as the outline of the model without area. The dot product dot(viewDir, normal) ^k can represent the distance from the pixel to the edge as the edge degree of the pixel. The edge degree of the pixel on the edge can be determined using the formula N·I, where N represents the vector normal (ie the normal direction), the vector I stands for Incident (incident direction, that is, observation direction), namely viewDir.

Optionally, in this embodiment, the texture data of the pixels on the edge may be, but not limited to, acquired from a normal map.

Optionally, in this embodiment, the edge degree of the pixel on the edge is stored in the horizontal axis coordinate channel (that is, the u coordinate) of the edge texture map, and the texture data of the pixel on the edge is stored in the edge texture map. In the vertical axis coordinate channel (that is, the v coordinate), the target edge texture map is obtained, and the target edge texture map can be used to render the edge of the model, thereby obtaining a model with a stroke, that is, a stroke model.

Optionally, in this embodiment, the distance from the pixel to the edge is stored in the horizontal axis coordinate channel, where 1 is closest to the contour line, and 0 is far away from the contour line. The texture data of the map is stored in the vertical axis coordinate channel. Distorts the map texture based on changes in normal and viewing angle to form a textured stroke.

As an optional embodiment, determining the edge degree of the pixel on the edge of the initial model according to the observation direction and the normal map includes:

S21, obtaining the observation direction, and obtaining the normal direction of the pixel on the edge of the initial model from the normal map;

S22, using the observation direction and the normal direction of the pixel on the edge of the initial model to calculate the projection of the observation direction of the pixel on the edge of the initial model on the normal direction;

S23, use the first parameter to control the complexity of the projection of the observation direction of the pixel on the edge of the initial model in the normal direction, and use the second parameter to control the observation direction of the pixel on the edge of the initial model in the normal direction The thickness of the projection in the line direction gives the edge degree of the pixels on the edge of the initial model.

Optionally, in this embodiment, the observation direction may be obtained from the direction of the current virtual camera. The normal direction of the pixels on the edge can be obtained from the normal map.

Optionally, in this embodiment, the formula N·I is used to calculate the projection of the observation direction of the pixel on the edge of the initial model on the normal direction, where N represents the vector normal (normal direction), and the vector I represents Incident. (incidence direction, that is, observation direction). The geometric meaning of the result of the dot product of N and I is the projection of the direction of the pixel in the normal direction, which is used to indicate the degree of the pixel's proximity to the contour. N comes from the normal map of the model, and I is the viewing direction of the camera (observer).

Optionally, in this embodiment, the edge degree of the pixels on the edge can be calculated by, but not limited to, the formula Bias+Scale(1+N·I) ^Power , where Scale (ie, the first parameter control) is used to control the line details. The complexity of Power (that is, the second parameter control) is used to control the thickness of the stroke, and Bias is 0 by default. For example: FIG. 3 is a schematic diagram of a stroke effect with different parameters according to an embodiment of the present disclosure. As shown in FIG. 3 , the larger the Scale, the higher the complexity of the stroke effect of the model, and the smaller the Power, the thickness of the stroke is controlled bigger.

As an optional embodiment, determining the texture data of the pixel on the edge of the initial model according to the coordinate value on the normal map includes:

S31, adding the pixels on the edge of the initial model after halving the corresponding horizontal and vertical coordinate values on the normal map, to obtain a coordinate vector of the pixels on the edge of the initial model;

S32: Convert the coordinate vector of the pixel on the edge of the initial model into a scalar parameter to obtain texture data of the pixel on the edge of the initial model.

Optionally, in this embodiment, the edge degree of the pixel on the edge is used as the u coordinate of the edge texture map, and the horizontal and vertical coordinate values are halved and converted into scalar parameters as the v coordinate of the edge texture map, so that the The texture sticks to the edge of the observed model.

Optionally, in this embodiment, the processing of the edge texture map is not limited to the above manner, and different manners can form different distortion effects, and this is just an example of the calculation of the stroke distortion.

As an optional embodiment, the ink texture is rendered to the middle of the initial model according to the background color of the initial model and the transparency in the texture map, and obtaining the rendered model includes:

S41, obtaining the transparency corresponding to the pixel in the middle of the initial model from the texture map;

S42, using the transparency corresponding to the pixel in the middle of the initial model to linearly mix the background color corresponding to the pixel in the middle of the initial model and the color data of the pixel in the middle of the initial model on the ink texture, to obtain texture data of pixels in the middle of the initial model;

S43: Render the texture data of the pixels in the middle of the initial model to the middle of the initial model to obtain the rendered model.

Optionally, in this embodiment, linear mixing refers to mixing two color data according to the Alpha (transparency) value, that is, lerp(color1, color2, alpha), where the Alpha value is 0 and displayed as the background color ( color1), when the Alpha value is 1, it is displayed as a texture (color2), and the Alpha value comes from the Alpha channel of the texture map.

Optionally, in this embodiment, the transparency processing in the middle of the model is optimized, and the linear mixture of the background color and the ink texture is captured to solve the problem of color penetration and interpenetration caused by the transparent part of the ink texture. For example: FIG. 4 is a schematic diagram of transparent processing in the middle of a model according to an embodiment of the present disclosure. As shown in FIG. 4 , when the above method is not used to transparently process the middle of the model, as shown in the box, the model obviously has color transparency. passing and interspersed issues. After using the above method to transparently process the middle of the model, the problem of color penetration and interpenetration is obviously solved.

As an optional embodiment, use the transparency corresponding to the pixel in the middle of the initial model to set the background color corresponding to the pixel in the middle of the initial model and the pixel in the middle of the initial model on the ink texture. Linear blending of color data includes:

S51, according to the ratio of the transparency corresponding to the pixel in the middle of the initial model, perform RGB ( Red-Green-Blue, red-green-blue) color value calculation.

Optionally, in this embodiment, the linear mixing process may be, but not limited to, performing RGB calculation on two colors according to the ratio of the transparency (alpha value) corresponding to the pixel in the middle of the stroke model.

Optionally, in this embodiment, there are many algorithms for mixing the two colors, but since the ink stroke color is generally black, the above-mentioned linear mixing method is used for description.

As an optional embodiment, mixing pixels whose transparency is less than a preset threshold on the edge of the intermediate model and the middle color of the intermediate model to obtain the target model includes:

S61, obtaining target pixels whose transparency is less than a preset threshold from the edge of the intermediate model;

S62, using the transparency of the target pixel to linearly mix the color data of the target pixel and the color data of the middle part of the intermediate model as the target color data of the target pixel to obtain the target model.

Optionally, in this embodiment, the target pixel whose transparency on the edge is less than the preset threshold value may be determined as a pixel that is not completely filled. A value of 1 is a pixel that is not fully filled.

Optionally, in this embodiment, using the transparency of the target pixel to linearly mix the color data of the target pixel and the color data in the middle of the intermediate model may be, but not limited to, combining the two colors according to the transparency (Alpha) of the target pixel. value) for the RGB calculation.

Optionally, in this embodiment, secondary linear mixing is performed between the pixels whose edges are not completely filled (translucent) and the inner color, so as to solve the problem of jagged edges. For example: FIG. 5 is a schematic diagram of a linear blending of the edge and the middle according to an embodiment of the present disclosure. As shown in FIG. 5 , when the edge and the middle are not linearly blended, the model will obviously have the problem of jagged edges. After linear blending, the jagged edges are effectively eliminated, so that the edges and the middle of the model can be smoothly transitioned.

It should be noted that, for the sake of simple description, the foregoing method embodiments are all expressed as a series of action combinations, but those skilled in the art should know that the present disclosure is not limited by the described action sequences. Because certain steps may be performed in other orders or concurrently in accordance with the present disclosure. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present disclosure.

From the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present disclosure essentially or the parts that contribute to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, CD-ROM), including several instructions to make an electronic device (which may be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present disclosure.

According to another aspect of the embodiments of the present disclosure, there is also provided a model rendering apparatus for implementing the above model rendering method. FIG. 6 is a schematic diagram of an optional model rendering apparatus according to an embodiment of the present disclosure. As shown in FIG. 6 , the apparatus may include:

The stroke module 62 is configured to stroke the edge of the initial model according to the observation direction and the normal map of the initial model to obtain a stroked model, wherein the observation direction is the direction in which the virtual camera observes the initial model;

The rendering module 64 is configured to render the ink texture to the middle of the initial model according to the background color of the initial model and the transparency in the texture map to obtain a rendering model;

The superimposing module 66 is configured to superimpose the stroke model and the rendering model to obtain an intermediate model;

The mixing module 68 is configured to mix the pixels whose transparency on the edge of the intermediate model is less than the preset threshold value and the color of the middle of the intermediate model to obtain the target model.

It should be noted that the stroke module 62 in this embodiment may be configured to perform step S202 in this embodiment of the present disclosure, and the rendering module 64 in this embodiment may be configured to perform step S204 in this embodiment of the present disclosure. The superposition module 66 in this embodiment may be configured to perform step S206 in the embodiment of the present disclosure, and the mixing module 68 in this embodiment may be configured to perform step S208 in the embodiment of the present disclosure.

It should be noted here that the examples and application scenarios implemented by the foregoing modules and corresponding steps are the same, but are not limited to the contents disclosed in the foregoing embodiments. It should be noted that, as a part of the device, the above modules may run in the hardware environment as shown in FIG. 1 , and may be implemented by software or hardware.

Through the above modules, the edge of the model and the middle of the model are rendered separately. For the edge of the model, the edge of the model is stroked according to the viewing direction and the normal map of the model, so that the texture can better fit the edge of the model. Internally, the background color and the transparency parameters in the texture map are combined for rendering to avoid the color penetration and interspersed problems caused by the transparent part of the ink texture. Thus, an ink-wash style target model is obtained, and the purpose of eliminating the internal edge jaggedness on the obtained ink-wash style target model is achieved, thereby achieving the technical effect of improving the image quality obtained by rendering the model in ink style, and then solving the problem. It solves the technical problem of poor image quality after rendering the model in ink style.

As an optional embodiment, the stroke module includes:

a first determining unit, configured to determine an edge degree of a pixel on the edge of the initial model according to the observation direction and the normal map, wherein the edge degree is used to indicate a pixel on the edge of the initial model the distance to the edge contour of the initial model;

a second determining unit, configured to determine texture data of pixels on the edge of the initial model according to the coordinate values on the normal map;

a storage unit, configured to store the edge degree of the pixel on the edge of the initial model into the horizontal axis coordinate channel of the edge texture map, and store the texture data of the pixel on the edge of the initial model into the edge texture In the vertical axis coordinate channel of the map, the target edge texture map is obtained;

A first rendering unit, configured to use the target edge texture map to render the edge of the initial model.

As an optional embodiment, the first determining unit is set to:

obtaining the viewing direction, and obtaining the normal direction of the pixel on the edge of the initial model from the normal map;

using the viewing direction and the normal direction of the pixel on the edge of the initial model to calculate the projection of the viewing direction of the pixel on the edge of the initial model on the normal direction;

A first parameter is used to control the complexity of the projection of the viewing direction of the pixels on the edges of the initial model in the normal direction, and a second parameter is used to control the viewing direction of the pixels on the edges of the initial model in the normal direction On the thickness of the projection, get the edge degree of the pixels on the edges of the initial model.

As an optional embodiment, the second determining unit is set to:

The pixels on the edge of the initial model are added after halving the corresponding horizontal and vertical coordinate values on the normal map to obtain the coordinate vector of the pixels on the edge of the initial model;

The coordinate vector of the pixel on the edge of the initial model is converted into a scalar parameter to obtain the texture data of the pixel on the edge of the initial model.

As an optional embodiment, the rendering module includes:

a first obtaining unit, configured to obtain the transparency corresponding to the pixel in the middle of the initial model from the texture map;

a first mixing unit, set to use the transparency corresponding to the pixels in the middle of the initial model to the background color corresponding to the pixels in the middle of the initial model and the color data of the pixels in the middle of the initial model on the ink texture Perform linear mixing to obtain the texture data of the pixels in the middle of the initial model;

The second rendering unit is configured to render the texture data of the pixels in the middle of the initial model to the middle of the initial model to obtain the rendered model.

As an optional embodiment, the first mixing unit is set to:

According to the ratio of the transparency corresponding to the pixel in the middle of the initial model, the background color corresponding to the pixel in the middle of the initial model and the color data of the pixel in the middle of the initial model on the ink texture are subjected to RGB color values. calculate.

As an optional embodiment, the mixing module includes:

a second acquiring unit, configured to acquire target pixels whose transparency is less than a preset threshold from the edge of the intermediate model;

a second mixing unit, configured to linearly mix the color data of the target pixel and the color data in the middle of the intermediate model using the transparency of the target pixel as the target color data of the target pixel to obtain the target model .

It should be noted here that the examples and application scenarios implemented by the foregoing modules and corresponding steps are the same, but are not limited to the contents disclosed in the foregoing embodiments. It should be noted that, as a part of the device, the above modules may run in the hardware environment as shown in FIG. 1 , and may be implemented by software or hardware, wherein the hardware environment includes a network environment.

According to another aspect of the embodiments of the present disclosure, an electronic device for implementing the above model rendering method is also provided.

FIG. 7 is a structural block diagram of an electronic device according to an embodiment of the present disclosure. As shown in FIG. 7 , the electronic device may include: one or more (only one is shown in the figure) a processor 701 , a memory 703 , and a transmission The device 705, as shown in FIG. 7, the electronic device may further include an input and output device 707.

The memory 703 may be configured to store software programs and modules, such as program instructions/modules corresponding to the model rendering method and device in the embodiments of the present disclosure, and the processor 701 runs the software programs and modules stored in the memory 703 to thereby Execute various functional applications and data processing, that is, implement the above-mentioned model rendering method. Memory 703 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 703 may further include memory located remotely from the processor 701, and these remote memories may be connected to the electronic device through a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

The above-mentioned transmission device 705 is configured to receive or send data via a network, and may also be configured to transmit data between the processor and the memory. Specific examples of the above-mentioned networks may include wired networks and wireless networks. In one example, the transmission device 705 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices and routers through a network cable so as to communicate with the Internet or a local area network. In one example, the transmission device 705 is a radio frequency (Radio Frequency, RF) module, which is configured to communicate with the Internet in a wireless manner.

Specifically, the memory 703 is configured to store application programs.

The processor 701 can call the application program stored in the memory 703 through the transmission device 705 to perform the following steps:

Stroke the edge of the initial model according to the observation direction and the normal map of the model to obtain a stroked model, wherein the observation direction is the direction in which the virtual camera observes the initial model;

Render the ink texture to the middle of the stroke model according to the background color of the initial model and the transparency in the texture map to obtain a rendering model;

A target model is obtained by mixing the pixels whose transparency on the edge of the rendering model is less than a preset threshold value and the middle color of the rendering model.

With the embodiments of the present disclosure, a solution for model rendering is provided. The edge of the model and the middle of the model are rendered separately. For the edge of the model, the edge of the model is stroked according to the viewing direction and the normal map of the model, which can make the texture better fit the edge of the model. For the interior of the model, a combination of The background color and the transparency parameter in the texture map are rendered to avoid the problem of color penetration and interspersed caused by the transparent part of the ink texture. For the pixels that are not completely filled at the edge of the model, combine the colors in the middle of the model to mix to obtain the ink style. It achieves the purpose of eliminating the internal edge jaggedness on the obtained ink style target model, thereby achieving the technical effect of improving the image quality obtained after the model is rendered in ink style, and then solving the problem of the model. Technical issues with poor image quality after ink style rendering.

Optionally, for specific examples in this embodiment, reference may be made to the examples described in the foregoing embodiments, and details are not described herein again in this embodiment.

Those of ordinary skill in the art can understand that the structure shown in FIG. 7 is only a schematic diagram, and the electronic device can be a smart phone (such as an Android phone, an iOS phone, etc.), a tablet computer, a handheld computer, and a mobile Internet Device (Mobile Internet Devices, MID) , PAD and other electronic equipment. FIG. 7 does not limit the structure of the above electronic device. For example, the electronic device may also include more or fewer components than those shown in FIG. 7 (eg, network interface, display device, etc.), or have a different configuration than that shown in FIG. 7 .

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing hardware related to the electronic device through a program, and the program can be stored in a computer-readable storage medium, and the storage medium can Including: flash disk, read-only memory (Read-Only Memory, ROM), random access device (Random Access Memory, RAM), magnetic disk or optical disk, etc.

Embodiments of the present disclosure also provide a storage medium. Optionally, in this embodiment, the above-mentioned storage medium may be set as program code for executing the rendering method of the model.

Optionally, in this embodiment, the foregoing storage medium may be located on at least one network device among multiple network devices in the network shown in the foregoing embodiment.

Optionally, in this embodiment, the storage medium is configured to store program codes for executing the following steps:

Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic Various media that can store program codes, such as discs or optical discs.

The above-mentioned serial numbers of the embodiments of the present disclosure are only for description, and do not represent the advantages or disadvantages of the embodiments.

If the integrated units in the above-mentioned embodiments are implemented in the form of software functional units and sold or used as independent products, they may be stored in the above-mentioned computer-readable storage medium. Based on this understanding, the technical solutions of the present disclosure are essentially or contribute to the prior art, or all or part of the technical solutions can be embodied in the form of software products, and the computer software products are stored in a storage medium, Several instructions are included to cause one or more computer devices (which may be personal computers, servers, or network devices, etc.) to perform all or part of the steps of the methods described in various embodiments of the present disclosure.

In the above-mentioned embodiments of the present disclosure, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in the present disclosure, it should be understood that the disclosed client may be implemented in other manners. The apparatus embodiments described above are only illustrative, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or Integration into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of units or modules, and may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The above are only the preferred embodiments of the present disclosure. It should be pointed out that for those skilled in the art, without departing from the principles of the present disclosure, several improvements and modifications can be made. It should be regarded as the protection scope of the present disclosure.

Claims

A rendering method for a model, including:

Stroke the edge of the initial model according to the observation direction and the normal map of the initial model to obtain a stroked model, wherein the observation direction is the direction in which the virtual camera observes the initial model;

Render the ink texture to the middle of the initial model according to the background color of the initial model and the transparency in the texture map to obtain a rendered model;

superimposing the stroke model and the rendering model to obtain an intermediate model;

A target model is obtained by mixing pixels whose transparency on the edge of the intermediate model is less than a preset threshold value and the color of the middle of the intermediate model.
The method according to claim 1, wherein the edge of the initial model is stroked according to the viewing direction and the normal map of the initial model, and obtaining the stroked model comprises:

The edge degree of the pixel on the edge of the initial model is determined according to the viewing direction and the normal map, wherein the edge degree is used to indicate the pixel on the edge of the initial model to the edge of the initial model the distance of the contour line;

determining the texture data of the pixels on the edge of the initial model according to the coordinate values on the normal map;

Store the edge degree of the pixel on the edge of the initial model into the horizontal axis coordinate channel of the edge texture map, and store the texture data of the pixel on the edge of the initial model into the vertical axis coordinate of the edge texture map In the channel, get the target edge texture map;

The edges of the initial model are rendered using the target edge texture map.
3. The method of claim 2, wherein determining edge degrees of pixels on edges of the initial model based on the viewing direction and the normal map comprises:

obtaining the viewing direction, and obtaining the normal direction of the pixel on the edge of the initial model from the normal map;

using the viewing direction and the normal direction of the pixel on the edge of the initial model to calculate the projection of the viewing direction of the pixel on the edge of the initial model on the normal direction;

A first parameter is used to control the complexity of the projection of the viewing direction of the pixels on the edges of the initial model in the normal direction, and a second parameter is used to control the viewing direction of the pixels on the edges of the initial model in the normal direction On the thickness of the projection, get the edge degree of the pixels on the edges of the initial model.
The method according to claim 2, wherein determining the texture data of the pixels on the edge of the initial model according to the coordinate values on the normal map comprises:

The pixels on the edge of the initial model are added after halving the corresponding horizontal and vertical coordinate values on the normal map to obtain the coordinate vector of the pixels on the edge of the initial model;

The coordinate vector of the pixel on the edge of the initial model is converted into a scalar parameter to obtain the texture data of the pixel on the edge of the initial model.
The method according to claim 1, wherein rendering the ink texture to the middle of the initial model according to the background color of the initial model and the transparency in the texture map, and obtaining the rendered model comprises:

Obtain the transparency corresponding to the pixel in the middle of the initial model from the texture map;

Using the transparency corresponding to the pixel in the middle of the initial model to linearly mix the background color corresponding to the pixel in the middle of the initial model and the color data of the pixel in the middle of the initial model on the ink texture to obtain the Texture data of pixels in the middle of the initial model;

The rendered model is obtained by rendering the texture data of the pixels in the middle of the initial model to the middle of the initial model.
The method according to claim 5, wherein the background color corresponding to the pixel in the middle of the initial model and the pixel in the middle of the initial model are used in the ink texture corresponding to the transparency of the pixel in the middle of the initial model Linear blending on color data consists of:

According to the ratio of the transparency corresponding to the pixel in the middle of the initial model, the background color corresponding to the pixel in the middle of the initial model and the color data of the pixel in the middle of the initial model on the ink texture are subjected to RGB color values. calculate.
The method according to claim 1, wherein, mixing the pixels whose transparency on the edge of the intermediate model is less than a preset threshold value and the middle color of the intermediate model to obtain the target model comprises:

Obtain target pixels whose transparency is less than a preset threshold from the edge of the intermediate model;

Using the transparency of the target pixel to linearly mix the color data of the target pixel and the color data of the middle part of the intermediate model as the target color data of the target pixel to obtain the target model.
A model rendering device, comprising:

The stroke module is set to stroke the edge of the initial model according to the observation direction and the normal map of the initial model to obtain the stroked model, wherein the observation direction is the direction in which the virtual camera observes the initial model;

A rendering module, configured to render the ink texture to the middle of the initial model according to the background color of the initial model and the transparency in the texture map, to obtain a rendering model;

an overlay module, configured to overlay the stroke model and the rendering model to obtain an intermediate model;

The mixing module is configured to mix the pixels whose transparency on the edge of the intermediate model is less than the preset threshold value and the color of the middle of the intermediate model to obtain the target model.
A storage medium comprising a stored program, wherein the program executes the method described in any one of the above claims 1 to 7 when running.
An electronic device, comprising a memory, a processor and a computer program stored on the memory and running on the processor, the processor executing any one of the above claims 1 to 7 through the computer program the method described.