WO2022217922A1

WO2022217922A1 - Method and apparatus for rendering model, storage medium, and computing device

Info

Publication number: WO2022217922A1
Application number: PCT/CN2021/132560
Authority: WO
Inventors: 赵第培
Original assignee: 完美世界(北京)软件科技发展有限公司
Priority date: 2021-04-16
Filing date: 2021-11-23
Publication date: 2022-10-20
Also published as: CN113223131A; CN113223131B

Abstract

Disclosed are a method and apparatus for rendering a model, a storage medium, and a computing device. The method comprises: defining an upward vector in a material editor, and on the basis of the defined upward vector, determining diffuse reflection data of a model to be rendered; adding superposition data shielded by a shadow into said model, and obtaining shadow result data projected on said model, the superposition data comprising highlight data and transmission data of said model; and performing calculation using the diffuse reflection data, the superposition data, and the shadow result data according to a preset algorithm to obtain final color data of said model, and rendering said model on the basis of the final color data. Embodiments of the present invention can also achieve the effect of unifying the diffuse reflection of said model without modifying a normal direction of said model itself, and can further achieve a real and natural rendering effect without adding additional data, such that the rendering pressure of a game engine is reduced, and the overall performance of the game engine is improved.

Description

Model rendering method, device, storage medium and computing device

cross reference

This application claims the priority of the Chinese patent application filed on April 16, 2021, with the application number of 202110412345.8 and the title of "a model rendering method, device, storage medium and computing device", the entire contents of which are incorporated by reference in in this application.

technical field

The present invention relates to the technical field of model rendering, in particular to a model rendering method, device, storage medium and computing device.

Background technique

At present, most projects use the form of inserts to simulate the effect of grass in the game scene, but due to the characteristics of the model itself, various wrong results will appear when calculating diffuse reflection, highlight, and transmission. In order to avoid errors in the calculation of diffuse reflection, highlight, and transmission, the existing technology modifies the normal direction of the patch grass model so that all model normals are vertically upward, so as to use the upward normal results to calculate lighting. . In addition, the existing technology will use a more detailed model to simulate the grass, show the shape of the grass on the model, and use the normal of the model itself to calculate the lighting.

However, after modifying the normal direction of the patch grass model, although the grass light and shadow relationship is unified when calculating the diffuse reflection result of the patch grass model, when calculating the highlight item of the patch grass model, the normal is facing the sky direction. , the calculated highlight result is not reflected by the surface of the grass to the human eyes. The result of the performance is that the highlights can only be seen when the light is backlit, and no light can be reflected to the eyes when the light is straight. This is similar to The reality is inconsistent. As shown in Figure 1, the normal of the modified patch grass model is oriented towards the diffuse reflection direction ReflectionDir and the human viewing direction ViewDir. In order to achieve a realistic effect, if a more detailed model is used to simulate the shape of the grass, the number of model vertices will undoubtedly increase, thereby increasing the rendering pressure and affecting the rendering efficiency.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention is proposed in order to provide a model rendering method, device, storage medium and computing device that overcomes the above problems or at least partially solves the above problems, which can be rendered without modifying the normal direction of the model itself. Above, the over-smoothed diffuse reflection data is also calculated, and the effect of unifying the diffuse reflection of the model to be rendered is achieved. Moreover, on the basis of achieving a real and natural rendering effect, it can effectively reduce the rendering pressure of the game engine without adding additional data and use less model resources, thereby improving the overall performance of the game engine.

According to an aspect of the present invention, a method for rendering a model is provided, comprising: defining an upward vector in a material editor, and determining diffuse reflection data of a model to be rendered based on the defined upward vector; Add the overlay data that is occluded by the shadow, and obtain the shadow result data projected on the model to be rendered, the overlay data includes the highlight data and transmission data of the model to be rendered; the diffuse reflection data, the overlay data and all The shadow result data is calculated according to a preset algorithm to obtain final color data of the model to be rendered, and the model to be rendered is rendered based on the final color data.

According to another aspect of the present invention, a model rendering device is provided, comprising:

A determination module, suitable for defining an upward vector in the material editor, and determining the diffuse reflection data of the model to be rendered based on the defined upward vector; an adding module, suitable for adding a superposition occluded by shadows in the above-mentioned model to be rendered data, and obtain the shadow result data projected on the model to be rendered, the superimposed data includes the highlight data and transmission data of the model to be rendered; the rendering module is suitable for the above-mentioned diffuse reflection data, the above-mentioned superimposed data and The shadow result data is calculated according to a preset algorithm to obtain final color data of the model to be rendered, and the model to be rendered is rendered based on the final color data.

According to yet another aspect of the present invention, a computing device is provided, comprising a memory, a processor, and computer programs/instructions stored on the memory, and the processor implements the above-mentioned first aspect when executing the computer programs/instructions steps of the method.

According to still another aspect of the present invention, a computer storage medium is provided, which stores computer programs/instructions, and when the computer programs/instructions are executed by a processor, implements the steps of the method in the first aspect. .

According to yet another aspect of the present invention, a computer program product is provided, comprising a computer program/instruction, when the computer program/instruction is executed by a processor, the steps of the method described in the first aspect above are implemented.

The beneficial effects of the present invention are: in the embodiment of the present invention, by defining the upward vector in the material editor, that is, using the upward vector to simulate the upward normal direction, the upward vector can be used to determine the direction of the model to be rendered. For diffuse reflection data, the embodiment of the present invention does not need to modify the normal direction of the model to be rendered, and can also calculate excessively smooth diffuse reflection data, and achieve the effect of unifying the diffuse reflection of the model to be rendered. In addition, since there is no need to modify the normal direction of the model to be rendered, the subsequent calculation of the highlight item of the model to be rendered can also effectively avoid a situation where the highlight result is not reflected by the surface of the grass to human eyes. In this embodiment of the present invention, superimposed data occluded by shadows is added to the model to be rendered, and the final color data used for rendering the model to be rendered is calculated by using the diffuse reflection data, the superimposed data and the shadow result data, which can avoid the appearance of the model to be rendered in the light. The problem of color is superimposed on places that cannot be illuminated, so as to achieve a realistic and natural rendering effect. On the basis of achieving a real and natural rendering effect, the embodiments of the present invention do not add additional data, and use less model resources (for example, use less model vertices), effectively reducing the rendering of the game engine pressure, which in turn improves the overall performance of the game engine.

The above description is only an overview of the technical solutions of the present invention, in order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand , the following specific embodiments of the present invention are given.

The above and other objects, advantages and features of the present invention will be more apparent to those skilled in the art from the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

The above and various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. In the attached image:

Fig. 1 schematically shows the light map after modifying the normal of the model to be rendered in the prior art;

FIG. 2 schematically shows a flowchart of a model rendering method according to an embodiment of the present invention;

3 schematically shows a process diagram of adding overlay data occluded by shadows in a model to be rendered according to an embodiment of the present invention;

FIG. 4 schematically shows a light map after retaining the normal of the model to be rendered according to an embodiment of the present invention;

FIG. 5 schematically shows a structural diagram of a model rendering apparatus according to an embodiment of the present invention;

Figure 6 schematically shows a block diagram of a computing device for implementing the method according to the present invention; and

Figure 7 schematically shows a block diagram of a computer program product implementing the method according to the invention.

specific embodiment

The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The following description is merely illustrative of the basic principles of the present invention and is not intended to limit it.

It should be noted that the terms "first", "second" and the like in the description and claims of the present invention 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 invention 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.

In order to solve the above technical problems, an embodiment of the present invention provides a model rendering method. FIG. 2 schematically shows a flowchart of a model rendering method according to an embodiment of the present invention. Referring to FIG. 2 , the method may include Steps S102 to S106.

In step S102, an upward vector is defined in the material editor, and the diffuse reflection data of the model to be rendered is determined based on the defined upward vector.

In this embodiment of the present invention, diffuse reflection refers to a phenomenon in which light projected on a rough surface of an object is reflected in all directions. When a parallel incident light ray strikes a rough surface of an object, the rough surface reflects the incident light rays in all directions. Although the incident light rays are parallel to each other, the normal directions of the points on the surface of the object are inconsistent, so the reflected light rays will be irregularly reflected in different directions. diffusion".

In step S104, superimposed data occluded by shadows is added to the model to be rendered, and shadow result data projected onto the model to be rendered is acquired, where the superimposed data includes highlight data and transmission data of the model to be rendered.

In step S106, the diffuse reflection data, the overlay data and the shadow result data are calculated according to a preset algorithm to obtain final color data of the model to be rendered, and the model to be rendered is rendered based on the final color data.

In this embodiment of the present invention, the upward vector is defined in the material editor, that is, the upward vector is used to simulate the upward normal direction, so that the upward vector can be used to determine the diffuse reflection data of the model to be rendered, and no modification is required in this embodiment of the present invention The normal direction of the model to be rendered itself can also calculate the over-smooth diffuse reflection data, and achieve the effect of unifying the diffuse reflection of the model to be rendered.

Since there is no need to modify the normal direction of the model to be rendered, the subsequent calculation of the highlight item of the model to be rendered can also effectively avoid the situation that the highlight result is not reflected by the surface of the grass to the human eyes. In addition, in this embodiment of the present invention, superimposed data occluded by shadows is added to the model to be rendered, and final color data for rendering the model to be rendered can be obtained by calculating the diffuse reflection data, the superimposed data and the shadow result data, which can avoid the appearance of the model to be rendered. The problem of superimposing colors in places where the light cannot reach, so as to achieve a realistic and natural rendering effect.

On the basis of achieving a real and natural rendering effect, the embodiments of the present invention do not add additional data, and use less model resources (for example, use less model vertices), effectively reducing the rendering of the game engine pressure, which in turn improves the overall performance of the game engine.

In some embodiments of the present invention, the to-be-rendered model may be an insert grass model, and certainly may also be other types of models related to plants, which are not specifically limited in this embodiment of the present invention. In this embodiment, it should be noted that the grass inserts are generally in the form of models in the game engine. Therefore, for the plants on the ground such as grass in the game scene, it can be roughly perpendicular to the ground and interspersed with each other. The model is used to express the shape of the grass, that is, the patch grass model is used to represent the shape of the grass on the ground in the game scene, and multiple patch grass models in the game scene are perpendicular to the ground and interspersed with each other.

The game engine in the embodiment of the present invention may use a UE (Unreal Engine, Unreal Engine) engine, and of course other engines may also be used, and the type of the game engine is not specifically limited here.

Usually, the model to be rendered can only save one set of normal information by default, but two sets of normal information are needed when calculating lighting, one set of normal information facing upward is used to calculate diffuse reflection, and one set of the model to be rendered itself The normal information of is used to calculate the specular. The normal is mainly used to describe the vector of the surface direction of the model to be rendered. The vector of the surface direction of the model to be rendered is perpendicular to the model surface by default.

In order to avoid modifying the normal orientation of the model to be rendered, so that the result of calculating the highlights is not reflected to the human eyes by the surface of the model to be rendered, in this embodiment of the present invention, when the above step S102 is performed, the normal line according to the calculation of the diffuse reflection has a vertical For the upward feature, an upward vector (0, 0, 1) is used in the game engine to replace the normal information used to calculate the diffuse reflection. It is not necessary to modify the normal of the model to be rendered, but directly use the upward direction. The upper vector (0, 0, 1) is used to calculate the diffuse reflection data of the model to be rendered, which can also achieve the effect of unifying the diffuse reflection of the model to be rendered.

Generally, the way to calculate the diffuse reflection data of the patch grass model is D diffuse reflection = N model normal · L illumination direction. In this embodiment of the present invention, the upward vector (0, 0, 1) is used to replace the N model normal. In step S102, when determining the diffuse reflection data of the model to be rendered based on the defined upward vector, first obtain the illumination direction information of the model to be rendered, that is, the L illumination direction, and then multiply the defined upward vector with the illumination direction information to calculate The diffuse reflection data of the model to be rendered is obtained, that is, the diffuse reflection data of the patch grass model is obtained by multiplying the upward vector (0, 0, 1) by the L illumination direction.

Due to the characteristics of the game engine, only one normal information can be passed in when passing parameters for the material of the model. Combined with the above introduction, the model to be rendered can only save one set of normal information by default. The set of normals to calculate the lighting also needs to add extra calculation. In the game engine, the final calculation result can be superimposed with color through the self-illumination attribute, but the self-illumination color does not consider the shadow problem, and the color will also be superimposed in the place where the light cannot be illuminated, which is illogical . Therefore, the embodiments of the present invention consider the influence of shadows when superimposing colors.

In some embodiments of the present invention, referring to step S104 above, the process of adding overlay data occluded by shadows in the model to be rendered may include steps S1041 to S1043 shown in FIG. 3 .

In step S1041, a superimposed item variable occluded by the shadow is defined in the model to be rendered.

In the embodiment of the present invention, the superimposed item variable occluded by the shadow is first defined in the model to be rendered, that is, a variable (buffer) is prepared in advance to store superimposed item data calculated later according to the highlight data and the transmission data.

In step S1042, the highlight data and the transmission data of the model to be rendered are calculated respectively, and the sum of the highlight data and the transmission data is obtained to obtain the superimposed data occluded by the shadow.

Summing the highlight data and transmission data to obtain the superimposed data occluded by the shadow, the calculation formula is E _{superimposed color} = S _{model highlight} + T _{transmission color} , where E _{superimposed color} represents the superimposed data occluded by shadow, S _model Renders the specular data for the model's normal calculation, and the T _{transmission color} represents the transmission data.

The highlight in the embodiment of the present invention is actually an artistic term, which refers to the brightest point on the surface of the irradiated object when the light of the light source irradiates the object and then reflects into the human eyes, and the highlight does not represent light in nature. , but refers to the brightest part of the object.

What needs to be introduced about transmission is that when the light of the light source is incident on the surface of a transparent or translucent material, some of the light is reflected, some of the light is absorbed, and some of the light can be transmitted through the transparent or translucent material. Transmission is the outgoing phenomenon of incident light rays after they have been refracted and passed through an object. The objects to be transmitted can be transparent or translucent, such as objects made of glass, color filters, etc.

In step S1043, the overlay data is added to the defined overlay variable.

In this step, the calculated overlay data is added to the defined overlay item variable, so that overlay data occluded by shadows can be added to the model to be rendered. In addition, since the embodiment of the present invention uses an upward vector (0, 0, 1) to replace the normal information for calculating the diffuse reflection, the normal of the model to be rendered is retained, as shown in FIG. Its own normal direction, reflection direction ReflectionDir and people's viewing direction ViewDir. Therefore, the specular data of the model to be rendered can be calculated using the normal of the model to be rendered.

When performing the above step S1042 to calculate the highlight data of the model to be rendered, the normal information of the model to be rendered can be obtained first, and then the highlight data of the model to be rendered can be obtained by calculating based on the normal information of the model to be rendered.

Since there is no need to modify the normal direction of the model to be rendered, the calculation of the highlight item of the model to be rendered can effectively avoid the situation that the highlight result is not reflected by the surface of the grass to the human eyes, and can only be seen when it is backlit. to the highlights, and there is no problem of light reflecting to the eyes when the light is in the front.

In the embodiment of the present invention, after calculating the highlight data of the model to be rendered, the highlight data can be superimposed on the conventional and general calculation results such as fog effect and indirect light calculated by the original Shading Model of the game engine, so as to render a real highlight effect. .

Referring to the above step S1042, in some embodiments of the present invention, when calculating the transmission data of the model to be rendered, first obtain the viewing direction information and the lighting direction information of the model to be rendered, and then perform a dot product on the viewing direction information and the lighting direction information The transmission intensity of the model to be rendered is obtained by calculation, and finally, the transmission color of the model to be rendered is obtained, and the transmission data of the model to be rendered is obtained by calculation according to the transmission color and the transmission intensity. Specifically, the transmission data of the grass model can be obtained by calculation according to the formula: (observation direction·light direction) ² × transmission color × transmission intensity.

In this embodiment of the present invention, after calculating the transmission data of the model to be rendered, the transmission data can be superimposed on the conventional and general calculation results such as fog effect and indirect light calculated by the original Shading Model of the game engine, so as to render a real transmission effect. .

Therefore, the embodiment of the present invention can use a smaller number of model vertices to simulate the shape of the grass, and can not only obtain the uniform diffuse reflection effect of the patch grass model, but also obtain the correct highlight and transmission results.

The process of calculating the diffuse reflection data and the superimposed data has been described above. In an embodiment of the present invention, the final color data of the model to be rendered is obtained by calculating the diffuse reflection data, the superimposed data and the shadow result data according to a preset algorithm. During the process, the diffuse reflection data and the overlay data can be summed first. Since the summation of the highlight data of the S _{model and} the _{transmission color} of the transmission data T can obtain the _superimposed _color of the superimposed data E _occluded by the shadow. The formula for the summation can be C _{diffuse data} + S _{model specular} + T _{transmission color} .

Then, multiply the summation result of the diffuse reflection data and the superimposed data with the obtained shadow result data to obtain the final color data of the model to be rendered, that is, according to the formula Color _{final color} = (C _{diffuse reflection} _data + S _{highlight data} + T _{transmission color} ) × Shadow _{shadow result} calculation to obtain the final color data Color _{final color} of the model to be rendered. The final color data of the to-be-rendered model can be used to render the to-be-rendered model effectively, for example, rendering the grass insert model can obtain the effect of real and natural grass.

The virtual scene of the insert grass model application in the embodiment of the present invention may be a game scene, a virtual reality (VR, Virtual Reality) scene, an animation scene, a simulator scene, and the like. For example, the patch grass model application renders the game scene in the Android system of the mobile terminal (such as a mobile phone). For another example, the insert grass model is used to render animation scenes in the Android system on the PC (Personal Computer, personal computer) side. The embodiment of the present invention does not specifically limit the application scenarios of the slug grass model.

In order to further improve the rendering efficiency of the slug model and the rendering efficiency of the virtual scene where the slug model is located, the embodiment of the present invention can also use multiple rendering servers to render the scene to be rendered collaboratively, so as to reduce the rendering pressure of a single rendering server. In addition, in order to reasonably and effectively apply multiple rendering servers, the embodiment of the present invention may also employ an intermediate server to reasonably schedule each rendering server. The intermediate server and multiple rendering servers can form a rendering cluster together. The working process of each rendering server and intermediate server in the rendering cluster is described below.

After the intermediate server receives the rendering request for the virtual scene including the slug model, the intermediate server can obtain the status information reported by each rendering server in the rendering cluster. Then, a target rendering server is determined from the rendering servers in the rendering cluster according to the state information of each rendering server. The status information of the rendering server may include information such as whether the rendering server is online, the busyness of the rendering server, and the memory occupancy rate of the rendering server. Further, the determined target rendering server is requested to render the virtual scene containing the slug model, and the target rendering server can effectively render the slug model based on the final color data of the slug model calculated in the above embodiment. rendering.

In this embodiment, each rendering server can acquire its own state information in real time, and report the acquired state information to the intermediate server, and the intermediate server saves the state information reported by each rendering server, and continuously updates the stored state information.

The embodiments of the present invention may be used for rendering of game scenes, and may also be used for rendering of other three-dimensional scenes, which are not specifically limited in the embodiments of the present invention.

Therefore, the scene to be rendered in the embodiment of the present invention is not rendered by a single rendering server, but multiple rendering servers work together, which not only greatly reduces the rendering pressure of a single server, but also improves the scene rendering efficiency and improves the user experience. Moreover, multiple low-configuration rendering servers can be used to replace high-configuration rendering servers, thereby effectively reducing the deployment cost of the rendering cluster.

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 invention is not limited by the described action sequence. As in accordance with the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions involved are not necessarily required by the present invention.

Based on the same inventive concept, an embodiment of the present invention further provides a model rendering apparatus, and FIG. 5 schematically shows a structural diagram of a model rendering apparatus according to an embodiment of the present invention. Referring to FIG. 5 , the model rendering apparatus 500 may include a determining module 510 , an adding module 520 and a rendering module 530 .

The determining module 510 is adapted to define an upward vector in the material editor, and determine the diffuse reflection data of the model to be rendered based on the defined upward vector.

By using the upward vector to simulate the upward normal direction, the upward vector can be used to determine the diffuse reflection data of the model to be rendered. This embodiment of the present invention does not need to modify the normal direction of the model to be rendered itself, and can also calculate excessive smoothing The diffuse reflection data to achieve the uniform effect of the diffuse reflection of the model to be rendered. In addition, since there is no need to modify the normal direction of the model to be rendered, the subsequent calculation of the highlight item of the model to be rendered can also effectively avoid a situation where the highlight result is not reflected by the surface of the grass to human eyes.

The adding module 520 is adapted to add overlay data occluded by shadows in the model to be rendered, and obtain shadow result data projected on the model to be rendered, where the overlay data includes highlight data and transmission data of the model to be rendered.

The rendering module 530 is adapted to calculate the diffuse reflection data, the overlay data and the shadow result data according to a preset algorithm to obtain final color data of the model to be rendered, and render the model to be rendered based on the final color data.

Add the overlay data occluded by shadows to the model to be rendered, and use the diffuse reflection data, overlay data and shadow result data to calculate the final color data for rendering the model to be rendered, which can avoid the appearance of the model to be rendered that cannot be illuminated by light. The problem is that the place is superimposed with color, so as to achieve a realistic and natural rendering effect. Further, on the basis of achieving a real and natural rendering effect, the embodiment of the present invention does not add additional data, and uses less model resources, which effectively reduces the rendering pressure of the game engine, thereby improving the performance of the game engine. overall performance.

In some embodiments of the present invention, the model to be rendered includes a patch grass model, and the multiple patch grass models in the game scene are perpendicular to the ground and interspersed with each other.

In some embodiments of the present invention, the determining module 510 is further adapted to obtain illumination direction information of the model to be rendered; and multiply the defined upward vector by the illumination direction information to obtain the diffuse reflection data of the model to be rendered.

In some embodiments of the present invention, the addition module 520 is further adapted to define a superimposed item variable occluded by shadows in the model to be rendered; separately calculate the highlight data and transmission data of the model to be rendered, and sum the highlight data and the transmission data to obtain Overlay data occluded by shadows; add overlay data to the defined overlay variable.

In some embodiments of the present invention, the addition module 520 is further adapted to obtain normal information of the model to be rendered; and calculate the highlight data of the model to be rendered based on the normal information of the model to be rendered.

In some embodiments of the present invention, a module 520 is added, which is further adapted to obtain the viewing direction information and illumination direction information of the model to be rendered; perform dot product calculation on the viewing direction information and the illumination direction information to obtain the transmission intensity of the model to be rendered; obtain the transmission intensity of the model to be rendered; The transmission color of the rendered model is calculated according to the transmission color and the transmission intensity to obtain the transmission data of the model to be rendered.

In some embodiments of the present invention, the rendering module 530 is further adapted to sum the diffuse reflection data and the overlay data; multiply the summation result of the diffuse reflection data and the overlay data with the shadow result data to obtain the final model of the to-be-rendered model. color data.

Various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in the rendering apparatus of the model according to the embodiment of the present invention. The present invention can also be implemented as a program/instruction (eg, computer program/instruction and computer program product) for an apparatus or apparatus for performing some or all of the methods described herein. Such programs/instructions implementing the present invention may be stored on a computer readable medium, or may exist in the form of one or more signals, such signals may be downloaded from an Internet website, or provided on a carrier signal, or in any form Available in other formats.

Computer storage media includes both persistent and non-permanent, removable and non-removable media, and storage of information may be implemented by any method or technology. Information may be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Flash Memory or other memory technology, Compact Disc Read Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cartridges, disk storage, quantum memory, graphene-based storage media or other magnetic storage devices or any other non-transmission media can be used to store information that can be accessed by computing devices.

FIG. 6 schematically shows a block diagram of a computing device that can implement a model rendering method according to the present invention, the computing device including a processor 610 and a computer-readable medium in the form of a memory 620 . Memory 620 is an example of a computer-readable medium having storage space 630 for storing computer programs/instructions 631 . When the computer program/instructions 631 are executed by the processor 610, the various steps in the model rendering method described above may be implemented.

Figure 7 schematically shows a block diagram of a computer program product implementing the method according to the invention. The computer program product includes a computer program/instructions 710 that, when executed by a processor, such as the processor 610 shown in FIG. 6, can implement the model rendering methods described above. each step.

Specific embodiments of this specification have been described above, and other embodiments are intended to be included within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve desirable results. Additionally, the processes depicted in the figures do not necessarily follow the specific order shown, or sequential order, to achieve desirable results. In certain embodiments, multitasking and parallel processing are also possible or advantageous.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed, or which are inherent to such a process, method, article of manufacture, or apparatus are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture, or device that includes the element.

It should be understood that the above-mentioned embodiments are only for the purpose of illustrating the present invention and not for limiting the present invention. Those skilled in the art can also implement the present invention in other ways without departing from the basic spirit and characteristics of the present invention. The scope of the present invention shall be determined by the appended claims, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification shall be covered therein.

Claims

A rendering method for a model, including:

Define an up vector in the material editor, and determine the diffuse reflection data of the model to be rendered based on the defined up vector;

adding overlay data occluded by shadows in the model to be rendered, and obtaining shadow result data projected onto the model to be rendered, the overlay data includes highlight data and transmission data of the model to be rendered;

The diffuse reflection data, the overlay data and the shadow result data are calculated according to a preset algorithm to obtain final color data of the model to be rendered, and the model to be rendered is rendered based on the final color data.
The method according to claim 1, wherein the model to be rendered comprises a patch grass model, and a plurality of patch grass models in the game scene are perpendicular to the ground and interspersed with each other.
The method according to claim 1 or 2, wherein determining the diffuse reflection data of the model to be rendered based on the defined upward vector comprises:

obtaining the illumination direction information of the to-be-rendered model;

The diffuse reflection data of the to-be-rendered model is obtained by multiplying the defined upward vector by the lighting direction information.
The method according to claim 1 or 2, wherein adding overlay data occluded by shadows in the to-be-rendered model comprises:

Define a superimposed item variable occluded by the shadow in the to-be-rendered model;

Calculate the highlight data and the transmission data of the model to be rendered respectively, and sum the highlight data and the transmission data to obtain the overlay data blocked by the shadow;

The overlay data is added to the defined overlay variable.
The method according to claim 4, wherein calculating the specular data of the model to be rendered comprises:

Obtain the normal information of the to-be-rendered model itself;

The highlight data of the to-be-rendered model is calculated based on the normal information of the to-be-rendered model itself.
The method according to claim 4, wherein calculating the transmission data of the model to be rendered comprises:

obtaining the viewing direction information and the illumination direction information of the model to be rendered;

Performing dot product calculation on the viewing direction information and the illumination direction information to obtain the transmission intensity of the model to be rendered;

The transmission color of the model to be rendered is acquired, and the transmission data of the model to be rendered is obtained by calculating according to the transmission color and the transmission intensity.
The method according to claim 1 or 2, wherein calculating the diffuse reflection data, the overlay data and the shadow result data according to a preset algorithm to obtain final color data of the model to be rendered, comprising:

summing the diffuse data and overlay data;

The summation result of the diffuse reflection data and the overlay data is multiplied by the shadow result data to obtain the final color data of the to-be-rendered model.
A model rendering device, comprising:

The determination module is used to define an up vector in the material editor, and determine the diffuse reflection data of the model to be rendered based on the defined up vector;

The adding module is used to add overlay data occluded by shadows in the model to be rendered, and obtain shadow result data projected onto the model to be rendered, where the overlay data includes highlight data and transmission data of the model to be rendered;

A rendering module, configured to calculate the diffuse reflection data, the overlay data and the shadow result data according to a preset algorithm to obtain final color data of the model to be rendered, and render the model to be rendered based on the final color data .
A computing device, comprising a memory, a processor and a computer program/instruction stored on the memory, the processor implementing the rendering of the model according to any one of claims 1-7 when the processor executes the computer program/instruction steps of the method.
A computer storage medium having computer programs/instructions stored thereon, the computer programs/instructions implementing the steps of the model rendering method according to any one of claims 1-7 when the computer program/instructions are executed by a processor.
A computer program product comprising computer programs/instructions which, when executed by a processor, implement the steps of the method for rendering a model according to any one of claims 1-7.