WO2022062254A1

WO2022062254A1 - Method and apparatus for rendering rain and snow special effects in real time

Info

Publication number: WO2022062254A1
Application number: PCT/CN2020/141345
Authority: WO
Inventors: 杨永康
Original assignee: 威创集团股份有限公司
Priority date: 2020-09-22
Filing date: 2020-12-30
Publication date: 2022-03-31
Also published as: CN112116689A; CN112116689B

Abstract

A method and apparatus for rendering rain and snow special effects in real time, the method comprising: establishing a circular particle generation area by taking the position of a camera as the center, so as to obtain a bottom-layer area, configuring at least one picture of a single raindrop or snowflake for each particle in the bottom-layer area, and superposing a normal map (101); establishing an upper-layer area in front of the bottom-layer area along a line-of-sight direction of the camera, and pasting a picture of raindrops or snowflakes on the upper-layer area (102); respectively configuring the bottom-layer area and the upper-layer area according to real-time rain condition information or snow condition information (103); and simultaneously rendering the bottom-layer area and the upper-layer area according to the configuration results of the bottom-layer area and the upper-layer area (104). By means of the method, the technical problem in the prior art of when faced with a large scene and a large visual distance, a finally presented image being insubstantial and lacking dimension and realism as a result of performance consumption, which is brought about by a sharp increase in the number of particles, being reduced by means of reducing the number of particles and reducing a field-of-view distance covered by particle special effects is solved.

Description

A kind of real-time rain and snow special effect rendering method and device

This application claims the priority of the Chinese patent application with the application number 202011001256.6 and the invention titled "A real-time rain and snow special effect rendering method and device", which was filed with the China Patent Office on September 22, 2020, the entire contents of which are incorporated by reference in in this application.

technical field

The present application relates to the technical field of computer simulation, and in particular, to a real-time rain and snow special effect rendering method and device.

Background technique

The simulation of natural scenes such as rain and snow has a wide range of applications in the field of computer simulation, which can improve the fidelity of three-dimensional scenes. In the following city-level simulation scheme, it is necessary to obtain the weather parameters (rainfall, rainfall range, wind direction, wind speed and other parameters) in the real environment in real time, and dynamically adjust the relevant parameters of the rain and snow effects in the 3D scene. It is possible to restore the weather conditions of the real environment.

In the prior art, a particle system is usually used to simulate raindrops and snowflakes to represent the weather in the scene. Usually, the particle system is centered on the camera, and the camera field of view distance is the radius to generate a picture with raindrops or snowflakes to simulate rain and snow weather. However, when the visual distance between the scene and the camera is very large, such as more than 1 kilometer, if you continue to use the above method for filling, a large number of particles will be required, and as the visual range increases, the required number of particles will increase. And the requirements for computer performance will increase exponentially, which will seriously consume computer performance, resulting in program freezes and even downtime. In a large scene with a large viewing distance, the existing technology reduces the number of particles and the visual distance covered by particle special effects to reduce the performance consumption caused by the sharp increase in the number of particles, resulting in a thin, layered and fidelity final rendered picture.

SUMMARY OF THE INVENTION

The present application provides a real-time rain and snow special effect rendering method and device, which are used to solve the problem of reducing the number of particles and reducing the visual distance covered by particle special effects in the prior art in the face of large scenes and large visual distances. The performance consumption brought about by the increase, leads to the technical problems that the final rendered picture is thin, lacks layers and fidelity.

In view of this, a first aspect of the present application provides a real-time rain and snow special effect rendering method, including:

A circular particle generation area is established with the camera position as the center, the bottom layer area is obtained, and after configuring at least one image of a single raindrop or snowflake for each particle in the bottom layer area, the normal map is superimposed;

Along the direction of the camera's sight line, establish an upper layer area in front of the lower layer area, and paste a picture of raindrops or snowflakes on the upper layer area;

According to real-time rain condition information or snow condition information, configure the bottom layer area and the upper layer area respectively;

The bottom layer area and the upper layer area are simultaneously rendered according to the configuration result of the bottom layer area and the upper layer area.

Optionally, along the line of sight of the camera, establish an upper layer area in front of the bottom layer area, and paste a picture of raindrops or snowflakes on the upper layer area, including:

along the direction of the camera's line of sight, establish a particle generation area in front of the bottom layer area to obtain an upper layer area;

After configuring at least one image of raindrops or snowflakes for each particle in the upper layer area, superimpose a normal map;

Correspondingly, according to the real-time rain condition information or snow condition information, the bottom layer area and the upper layer area are respectively configured, including:

According to real-time rain condition information or snow condition information, the number, particle size, particle movement speed and direction in the bottom layer area and the upper layer area are configured.

Optionally, the shape of the particle generation area includes at least a circle or a rectangle.

along the line of sight of the camera, establish an upper layer area in front of the bottom layer area, wherein the upper layer area is a cylindrical model;

Posting pictures of raindrops or snowflakes on the cylindrical model;

According to the real-time rain condition information or snow condition information, configure the number of particles, particle size, particle movement speed and direction in the bottom layer area, as well as the movement speed and movement direction of the pictures of raindrops or snowflakes in the upper layer area and the number of pictures to configure.

Optionally, the upper layer area includes a one-layer area, a two-layer area or a multi-layer area.

Optionally, when the upper layer area is a two-layer area, the upper layer area includes a first upper layer area and a second upper layer area;

Correspondingly, establishing an upper layer area in front of the bottom layer area along the camera line of sight, and pasting a picture of raindrops or snowflakes on the upper layer area, including:

along the line of sight of the camera, establish the first upper layer area in front of the bottom layer area, and establish the second upper layer area in front of the first upper layer area;

Paste pictures of raindrops or snowflakes on the first upper layer area and the second upper layer area.

Optionally, the picture of raindrops or snowflakes in the upper layer area is a picture of multiple parallel raindrops and rain fog with transparent channels or a picture of multiple parallel snowflakes with transparent channels, and the raindrops or snowflakes in the second upper layer area. The number of raindrops or snowflakes in the picture of the first upper layer area is more than the number of raindrops or snowflakes in the picture of the first upper layer area.

A second aspect of the present application provides a real-time rain and snow special effect rendering device, including:

The first establishment unit is used to establish a circular particle generation area with the camera position as the center, obtain the bottom layer area, and configure at least one image of a single raindrop or snowflake for each particle in the bottom layer area, and then superimpose the normal map ;

a second establishment unit, configured to establish an upper layer area in front of the bottom layer area along the camera line of sight, and paste a picture of raindrops or snowflakes on the upper layer area;

a configuration unit, configured to separately configure the bottom layer area and the upper layer area according to real-time rain condition information or snow condition information;

A rendering unit, configured to render the bottom layer region and the upper layer region simultaneously according to the configuration result of the bottom layer region and the upper layer region.

Optionally, the second establishment unit is specifically used for:

Correspondingly, the configuration unit is specifically used for:

Optionally, the second establishment unit is further used for:

Posting pictures of raindrops or snowflakes on the cylindrical model;

Correspondingly, the configuration unit is specifically used for:

As can be seen from the above technical solutions, the present application has the following advantages:

The present application provides a real-time rain and snow special effect rendering method, including: establishing a circular particle generation area with a camera position as the center, obtaining a bottom layer area, and configuring at least one picture of a single raindrop or snowflake for each particle in the bottom layer area Then, superimpose the normal map; along the camera line of sight, establish an upper area in front of the bottom area, and paste a picture of raindrops or snowflakes on the upper area; Configuration; according to the configuration results of the bottom layer area and the upper layer area, the bottom layer area and the upper layer area are rendered at the same time.

The real-time rain and snow special effects rendering method in this application designs a new rendering structure, and adds an upper layer area on the basis of the existing rendering structure that only has the bottom layer area. The number of simulated particles under the visible distance enables the computer to achieve realistic, dynamic and real-time rain and snow special effects in large scenes and large viewing distances with less performance overhead, thus solving the problem of the existing technology in the face of large scenes. Under the viewing distance, by reducing the number of particles and reducing the field of view covered by particle effects, the performance consumption caused by the sharp increase in the number of particles is reduced, resulting in technical problems of thin, layered and realistic final rendered images.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic flowchart of Embodiment 1 of a real-time rain and snow special effect rendering method provided by the present application;

2 is a schematic flowchart of Embodiment 2 of a real-time rain and snow special effect rendering method provided by the present application;

3 is a schematic flowchart of Embodiment 3 of a real-time rain and snow special effect rendering method provided by the present application;

4 is a schematic diagram of a first rendering structure provided by the application;

5 is a schematic diagram of a second rendering structure provided by the application;

6 is a schematic diagram of a third rendering structure provided by the present application;

FIG. 7 is a schematic structural diagram of a real-time rain and snow special effect rendering apparatus provided by the present application.

detailed description

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

When the existing method is applied to a large scene with a large visual distance, for example, to simulate a city with special effects of rain and snow, the existing method establishes a circular particle generation area centered on the camera position, and the particle generation area covers the entire area. Urban area, and then generate a large number of particles in the particle generation area for rain and snow special effects rendering. For a large scene such as a city with a large visual distance, using this method to generate a large number of particles will seriously consume computer performance and cause the program to freeze. , or even downtime. When faced with this situation, the usual practice is to reduce the number of particles and reduce the field of view distance covered by particle effects to reduce the performance consumption caused by the sharp increase in the number of particles, but it will result in a thin, layered and realistic final picture. degree of technical issues. In order to solve this problem, the present application provides a real-time rain and snow special effect rendering method.

For ease of understanding, please refer to FIG. 1. Embodiment 1 of a real-time rain and snow special effect rendering method provided by the present application includes:

Step 101 , establishing a circular particle generation area with the camera position as the center to obtain a bottom layer area, and after configuring at least one image of a single raindrop or snowflake for each particle in the bottom layer area, superimpose a normal map.

A circular particle generation area is established with the camera position as the center, and the bottom layer area is obtained. The radius of the circular particle generation area can be the distance of the camera's field of view, or it can be set according to the actual situation. Since the bottom layer is the layer closest to the camera, the particles are simulated using separate raindrop images. The image of raindrops or snowflakes is the material of particle rendering. When a same image material is used, repeated effects will inevitably occur when generated in large quantities. To avoid this situation, each particle can be configured with multiple images of raindrops or snowflakes. , to eliminate repetitive effects and make the simulation picture more natural and realistic. Therefore, in the embodiment of the present application, each particle in the bottom layer is configured with at least one image of a single raindrop or snowflake, and a normal map is superimposed. The use of a normal map belongs to the prior art, which will not be repeated here.

Step 102 , along the line of sight of the camera, establish an upper layer area in front of the bottom layer area, and paste a picture of raindrops or snowflakes on the upper layer area.

Please refer to the schematic diagram of a rendering structure provided in Figure 4. The circle at the bottom of the figure represents the range of the bottom layer, the symbol in the middle of the circle is the camera, and the triangular wire frame above the camera represents the viewing angle range of the camera. To the direction of the viewing angle range, establish an upper layer area in front of the bottom layer area, and paste a picture of raindrops or snowflakes on the upper layer area, wherein the shape of the upper layer area can be any shape such as a circle or a matrix. The distance between the upper layer area and the bottom layer area can be adjusted according to the performance of the computer and the effect of the scene. The higher the number of particles to be rendered, the higher the performance requirements of the computer.

Step 103: Configure the bottom layer area and the upper layer area respectively according to the real-time rain condition information or snow condition information.

According to the real-time rain condition information or snow condition information in the actual large scene, configure the bottom layer area and the upper layer area respectively, for example, configure the number of instances, particle size, particle movement speed and direction, etc.

Step 104: Render the bottom layer area and the upper layer area at the same time according to the configuration results of the bottom layer area and the upper layer area.

After configuring the bottom layer area and the upper layer area, the corresponding bottom layer area and the upper layer area are simultaneously rendered according to the configuration result, and the rain and snow effects are simulated, and the obtained rendering effect can be seen on the display.

In the real-time rain and snow special effects rendering method in the embodiment of the present application, a new rendering structure is designed, and an upper layer area is added on the basis that the existing rendering structure only has the bottom layer area. The number of simulated particles in the large visual distance of the scene enables the computer to achieve realistic, dynamic and real-time rain and snow special effects in the large scene and large visual distance with less performance overhead, thus solving the problem of the existing technology in the face of large scenes. At a large viewing distance, by reducing the number of particles and reducing the visual distance covered by particle effects, the performance consumption caused by the sharp increase in the number of particles is reduced, resulting in technical problems of thin, layered and fidelity final rendered images.

The above is Embodiment 1 of a real-time rain and snow special effect rendering method provided by the present application, and the following is Embodiment 2 of a real-time rain and snow special effect rendering method provided by the present application.

For ease of understanding, please refer to FIG. 2 , the second embodiment of a real-time rain and snow special effect rendering method provided by the present application includes:

Step 201 , establishing a circular particle generation area with the camera position as the center to obtain a bottom layer area, and after configuring at least one image of a single raindrop or snowflake for each particle in the bottom layer area, superimpose a normal map.

It is preferable to configure at least one picture of a single raindrop or snowflake with a transparent channel for each particle in the bottom layer area, so as to facilitate the superposition of rain and snow effects and make the presented picture more realistic.

Step 202 , along the line of sight of the camera, establish a particle generation area in front of the bottom layer area to obtain the upper layer area.

Along the line of sight of the camera, a particle generation area is established in front of the bottom layer area to obtain an upper layer area, wherein the shape of the particle generation area can be a circle, a rectangle or other shapes.

Further, along the line of sight of the camera, one layer, two layers or multiple layers of particle generation regions can be established in front of the bottom layer region, and correspondingly, the obtained upper layer region includes one layer region, two layer regions or multi-layer regions. In the embodiment of the present application, it is preferable to establish two layers of particle generation areas in front of the bottom layer area, and the obtained upper layer area includes a first upper layer area and a second upper layer area, that is, the rendering structure constructed in the embodiment of the present application is preferably three layers of particles, that is, along the In the direction of the camera's line of sight, a layer of particle generation area is established in front of the bottom layer area to obtain the first upper layer area, and a layer of particle generation area is established in front of the first upper layer area to obtain the second upper layer area. Please refer to Figure 5, where the first layer is equivalent to the bottom layer area, the shape of the particle generation area is a circle, the second layer is equivalent to the first upper layer area, the shape of the particle generation area is a rectangle, or a circle or other shapes , the third layer is equivalent to the second upper layer area, and the shape of the particle generation area is a matrix, and may also be a circle or other shapes.

Step 203: After configuring at least one image of raindrops or snowflakes for each particle in the upper layer area, superimpose a normal map.

After the upper layer area is established, configure at least one image of raindrops or snowflakes for each particle in the upper layer area, and then superimpose the normal map. When the upper area is a two-layer area, paste pictures of raindrops or snowflakes on the first upper area and the second upper area. Specifically, at least one picture of multiple parallel raindrops and fine rain fog with transparent channels or pictures of multiple parallel snowflakes with transparent channels is configured for each particle in the first upper layer area, and a normal map is superimposed; Each particle in the second upper layer area is configured with at least one picture of multiple parallel raindrops and fine rain fog with transparent channels or pictures of multiple parallel snowflakes with transparent channels, and superimposed normal maps, wherein the second upper layer area The number of raindrops or snowflakes in the picture of raindrops or snowflakes is much greater than the number of raindrops or snowflakes in the picture of raindrops or snowflakes in the first upper region.

The first upper layer area is located behind the bottom layer area and is farther from the camera than the bottom layer area. The purpose of designing this layer is to contrast with the bottom layer to form a sense of spatial hierarchy, and to visually increase the visual distance of the rain and snow effects. Due to the increased rendering range, rendering a raindrop image with each particle in the first layer will also result in a huge performance cost. Therefore, each particle image in the first upper layer region contains multiple parallel raindrops or multiple parallel snowflakes, so as to achieve the effect of simulating a large number of raindrops with a smaller number of particles.

The second upper layer area is located after the first upper layer area and is the farthest from the camera. The purpose of designing this layer is to provide a dynamic and layered background for the first two layers. The processing method of particle elements in this layer is similar to that in the first upper layer area, the difference is that each particle image in this layer contains more raindrop elements or snowflake elements, and the number and density of raindrops or snowflakes can be the same as those in the first upper layer area. dozens of times or more.

Step 204 , according to the real-time rain condition information or snow condition information, configure the particle number, particle size, particle movement speed and direction in the bottom layer area and the upper layer area.

Since the bottom layer is the layer closest to the camera, the particles are simulated using separate raindrop images. Therefore, by setting the size, movement direction and speed of each particle in this layer, the size, direction and speed of each raindrop or snowflake can be simulated. Among them, the number of particles can be set according to the real-time rain or snow condition information, the particle size can be approximated according to the rainfall or snowfall, the particle movement direction can be approximated or calculated through the current wind and wind direction, and the particle movement speed can be approximated according to the raindrop or snowfall. The size of snowflakes can be obtained by approximate simulation or calculation, so that the changes of raindrops or snowflakes by wind speed, resistance and other factors can be realized. In this layer, the visual effects of rain and snow at close range are mainly displayed, and the changes and influence. The configuration process of the upper layer area is similar to the configuration process of the bottom layer area. According to the real-time rain condition information or snow condition information, the number of particles, particle size, particle movement speed and direction in the bottom layer area and the upper layer area are configured to obtain the bottom layer area and the upper layer area, respectively. The configuration result of the zone.

Step 205: Render the bottom layer area and the upper layer area at the same time according to the configuration results of the bottom layer area and the upper layer area.

According to the configuration results of the particles in the bottom layer area and the upper layer area, the particles in the three-layer particle area are rendered at the same time, and the rain and snow special effects are simulated, and the obtained rendering effect can be displayed on the monitor.

In the embodiment of the present application, it is preferable to use a three-layer particle structure for rain and snow special effects rendering, and the particles in the layer closest to the camera are simulated by using separate pictures of raindrops or snowflakes. It can simulate the size, direction and speed of each raindrop or snowflake, and can realize the changes of raindrops or snowflakes by wind speed, resistance and other factors. The contrast between the second layer and the first layer forms a spatial layering, which visually increases the visual distance of the rain and snow effects. Each particle image in the second layer includes multiple parallel raindrops or snowflakes. , can achieve the effect of simulating a large number of raindrops or snowflakes with a small number of particles, and enhance the fidelity of the rendered picture; the third layer provides a dynamic and layered background for the first two layers, because the rendering range of the third layer is different. Compared with the first two layers, the range is further increased. In order not to increase the performance consumption of the computer, each particle image in the third layer contains more raindrops or snowflake elements, and the number and density of raindrops or snowflakes can be the same as that of the second layer. dozens of times or more.

In the embodiment of the present application, a new rendering structure is designed, a three-layer particle generation area is constructed, the number of particles in the first layer is reduced by layering, and the sense of layering is increased to make the picture more deep; through the cooperation between the three layers, the computer Realistic, dynamic, real-time rain and snow effects in large scenes and large viewing distances are realized with low performance overhead.

The above is the second embodiment of a real-time rain and snow special effect rendering method provided by the present application, and the following is the third embodiment of a real-time rain and snow special effect rendering method provided by the present application.

For ease of understanding, please refer to FIG. 3 , the third embodiment of a real-time rain and snow special effect rendering method provided by the present application includes:

Step 301 , establishing a circular particle generation area with the camera position as the center to obtain a bottom layer area, and after configuring at least one image of a single raindrop or snowflake for each particle in the bottom layer area, superimpose a normal map.

The specific content of step 301 is the same as that of step 201, and details are not repeated here.

Step 302 , establishing an upper layer area in front of the bottom layer area along the direction of the camera's sight line, wherein the upper layer area is a cylindrical model.

In the second embodiment, the upper layer area is the particle generation area, and particles are generated in this area, and there is no actual vertex model. In the embodiment of the present application, a cylindrical model is used, which is realized based on a real vertex mesh model, and no particles are generated. Please refer to FIG. 6 , in which the first layer is the bottom layer area, that is, the circular particle generation area. The second floor is the upper area, that is, the cylindrical model. The upper layer area is not limited to the form of particles, mainly through layering to reduce the number of particles in the bottom layer area, and increase the layering to give the picture depth.

Step 303, paste a picture of raindrops or snowflakes on the cylindrical model.

Paste pictures of multiple parallel raindrops and fine rain and fog with transparent channels or pictures of multiple parallel snowflakes with transparent channels on the cylindrical model, and by moving the picture, the effect of raindrops or snowflakes falling.

Step 304, according to the real-time rain condition information or snow condition information, configure the number of particles, particle size, particle movement speed and direction in the bottom layer area, and the movement speed, movement direction and direction of the pictures of raindrops or snowflakes in the upper layer area. Configure the number of pictures.

According to the real-time rain or snow condition information, configure the number of particles, particle size, particle movement speed and direction in the bottom layer, as well as the movement speed, movement direction and number of pictures of raindrops or snowflakes in the upper layer area. configuration. By configuring the particle size, movement direction and speed in the bottom layer area, and configuring the movement speed, movement direction and number of pictures of the raindrop or snowflake in the upper layer area, you can simulate the size, direction and number of each raindrop or snowflake. The speed can realize the change of raindrops or snowflakes by wind speed, resistance and other factors.

Step 305: Render the bottom layer area and the upper layer area at the same time according to the configuration results of the bottom layer area and the upper layer area.

According to the configuration results of the bottom layer area and the upper layer area, the bottom layer area and the upper layer area are rendered at the same time, and the rain and snow special effects are simulated, and the obtained rendering effect can be displayed on the monitor.

In the embodiment of the present application, by designing a new rendering structure, a layer of particle generation area and a layer of cylindrical model are constructed, and pictures of raindrops or snowflakes are pasted on the cylindrical model, and the pictures are moved to cause the effect of raindrops or snowflakes falling. Through layering, the number of particles in the first layer is reduced, and the sense of layering is increased to make the picture more deep; through the cooperation between the two layers, the computer can achieve realistic and dynamic large scenes and large viewing distances with low performance overhead. , Real-time rain and snow effects.

The above is Embodiment 3 of a real-time rain and snow special effect rendering method provided by the present application, and the following is Embodiment 1 of a real-time rain and snow special effect rendering apparatus provided by the present application.

For ease of understanding, please refer to FIG. 7 . Embodiment 1 of a real-time rain and snow special effect rendering apparatus provided by the present application includes:

The first establishment unit 401 is used to establish a circular particle generation area with the camera position as the center to obtain a bottom layer area, and after configuring at least one image of a single raindrop or snowflake for each particle in the bottom layer area, superimpose a normal map.

The second establishing unit 402 is configured to establish an upper layer area in front of the bottom layer area along the line of sight of the camera, and paste a picture of raindrops or snowflakes on the upper layer area.

The configuration unit 403 is configured to separately configure the bottom layer area and the upper layer area according to the real-time rain condition information or snow condition information.

The rendering unit 404 is configured to render the bottom layer area and the upper layer area at the same time according to the configuration result of the bottom layer area and the upper layer area.

The above is the first embodiment of a real-time rain and snow special effect rendering device provided by the application, and the following is the second embodiment of a real-time rain and snow special effect rendering device provided by the application.

The second embodiment of a real-time rain and snow special effect rendering device provided by this application includes:

The second establishment unit 402 is configured to establish an upper layer area in front of the bottom layer area along the line of sight of the camera, and paste a picture of raindrops or snowflakes on the upper layer area.

As a further improvement, the second establishing unit 402 is specifically used for:

Along the line of sight of the camera, establish a particle generation area in front of the bottom layer area to obtain the upper layer area;

After configuring at least one image of raindrops or snowflakes for each particle in the upper area, overlay the normal map;

Correspondingly, the configuration unit 403 is specifically used for:

Configure the number of particles, particle size, particle movement speed and direction in the bottom and upper areas based on real-time rain or snow conditions.

As a further improvement, the second establishing unit 402 is also used for:

Along the direction of the camera's sight line, establish an upper layer area in front of the bottom layer area, wherein the upper layer area is a cylindrical model;

Paste pictures of raindrops or snowflakes on the cylindrical model;

Correspondingly, the configuration unit 403 is specifically used for:

According to the real-time rain or snow condition information, configure the number of particles, particle size, particle movement speed and direction in the bottom layer, as well as the movement speed, movement direction and number of pictures of raindrops or snowflakes in the upper layer area. configuration.

As a further improvement, the upper layer area includes a one-layer area, a two-layer area or a multi-layer area.

As a further improvement, when the upper layer area is a two-layer area, the upper layer area includes a first upper layer area and a second upper layer area;

Correspondingly, the second establishing unit 402 is specifically configured to:

Along the line of sight of the camera, a first upper layer area is established in front of the bottom layer area, and a second upper layer area is established in front of the first upper layer area;

Paste pictures of raindrops or snowflakes on the first upper area and the second upper area.

As a further improvement, the picture of raindrops or snowflakes in the upper layer area is a picture of multiple parallel raindrops and rain fog with transparent channels or a picture of multiple parallel snowflakes with transparent channels, and the raindrops or snowflakes in the second upper layer area are in the picture. The number of raindrops or snowflakes is greater than the number of raindrops or snowflakes in the image of the first upper region.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, for the specific working process of the above-described devices and units, reference may be made to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated 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 devices or units, and may be in electrical, mechanical 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 application 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.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: The technical solutions described in the embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

A real-time rain and snow special effect rendering method, comprising:

A circular particle generation area is established with the camera position as the center, the bottom layer area is obtained, and after configuring at least one image of a single raindrop or snowflake for each particle in the bottom layer area, the normal map is superimposed;

Along the direction of the camera's sight line, establish an upper layer area in front of the lower layer area, and paste a picture of raindrops or snowflakes on the upper layer area;

According to real-time rain condition information or snow condition information, configure the bottom layer area and the upper layer area respectively;

The bottom layer area and the upper layer area are simultaneously rendered according to the configuration result of the bottom layer area and the upper layer area.
The real-time rain and snow special effect rendering method according to claim 1, wherein, along the line of sight of the camera, establishing an upper layer area in front of the bottom layer area, and pasting a picture of raindrops or snowflakes on the upper layer area, comprising: :

along the direction of the camera's line of sight, establish a particle generation area in front of the bottom layer area to obtain an upper layer area;

After configuring at least one image of raindrops or snowflakes for each particle in the upper layer area, superimpose a normal map;

Correspondingly, according to the real-time rain condition information or snow condition information, the bottom layer area and the upper layer area are respectively configured, including:

According to the real-time rain condition information or snow condition information, the particle quantity, particle size, particle movement speed and direction in the bottom layer area and the upper layer area are configured.
The real-time rain and snow special effect rendering method according to claim 2, wherein the shape of the particle generation area includes at least a circle or a rectangle.
The real-time rain and snow special effect rendering method according to claim 1, wherein, along the line of sight of the camera, establishing an upper layer area in front of the bottom layer area, and pasting a picture of raindrops or snowflakes on the upper layer area, comprising: :

along the line of sight of the camera, establish an upper layer area in front of the bottom layer area, wherein the upper layer area is a cylindrical model;

Posting pictures of raindrops or snowflakes on the cylindrical model;

Correspondingly, according to the real-time rain condition information or snow condition information, the bottom layer area and the upper layer area are respectively configured, including:

According to the real-time rain condition information or snow condition information, configure the number of particles, particle size, particle movement speed and direction in the bottom layer area, as well as the movement speed and movement direction of the pictures of raindrops or snowflakes in the upper layer area and the number of pictures to configure.
The real-time rain and snow special effect rendering method according to claim 1, wherein the upper layer area comprises a one-layer area, a two-layer area or a multi-layer area.
The real-time rain and snow special effect rendering method according to claim 5, wherein when the upper layer area is a two-layer area, the upper layer area includes a first upper layer area and a second upper layer area;

Correspondingly, along the line of sight of the camera, establish an upper layer area in front of the bottom layer area, and paste a picture of raindrops or snowflakes on the upper layer area, including:

along the line of sight of the camera, establish the first upper layer area in front of the bottom layer area, and establish the second upper layer area in front of the first upper layer area;

Paste pictures of raindrops or snowflakes on the first upper layer area and the second upper layer area.
The real-time rain and snow special effect rendering method according to claim 6, wherein the pictures of raindrops or snowflakes in the upper area are pictures of multiple parallel raindrops and rain fog with transparent channels or multiple parallel snowflakes with transparent channels and the number of raindrops or snowflakes in the picture of raindrops or snowflakes in the second upper layer area is greater than the number of raindrops or snowflakes in the picture of raindrops or snowflakes in the first upper layer area.
A real-time rain and snow special effect rendering device, comprising:

The first establishment unit is used to establish a circular particle generation area with the camera position as the center, obtain the bottom layer area, and configure at least one image of a single raindrop or snowflake for each particle in the bottom layer area, and then superimpose the normal map ;

A second establishment unit, configured to establish an upper layer area in front of the bottom layer area along the camera line of sight, and paste a picture of raindrops or snowflakes on the upper layer area;

a configuration unit, configured to separately configure the bottom layer area and the upper layer area according to real-time rain condition information or snow condition information;

A rendering unit, configured to render the bottom layer region and the upper layer region simultaneously according to the configuration result of the bottom layer region and the upper layer region.
The real-time rain and snow special effect rendering device according to claim 8, wherein the second establishment unit is specifically used for:

along the direction of the camera's line of sight, establish a particle generation area in front of the bottom layer area to obtain an upper layer area;

After configuring at least one image of raindrops or snowflakes for each particle in the upper layer area, superimpose a normal map;

Correspondingly, the configuration unit is specifically used for:

According to the real-time rain condition information or snow condition information, the particle quantity, particle size, particle movement speed and direction in the bottom layer area and the upper layer area are configured.
The real-time rain and snow special effect rendering device according to claim 8, wherein the second establishment unit is further used for:

along the line of sight of the camera, establish an upper layer area in front of the bottom layer area, wherein the upper layer area is a cylindrical model;

Posting pictures of raindrops or snowflakes on the cylindrical model;

Correspondingly, the configuration unit is specifically used for:

According to the real-time rain condition information or snow condition information, configure the number of particles, particle size, particle movement speed and direction in the bottom layer area, as well as the movement speed and movement direction of the pictures of raindrops or snowflakes in the upper layer area and the number of pictures to configure.