CN112184878B - Method, device and equipment for automatic generation and rendering of 3D night scene lights - Google Patents

Abstract

The application relates to a method, a device and equipment for automatically generating and rendering three-dimensional night scene lamplight, which are characterized in that a projection area of a rendering scene on a preset plane is obtained, a pre-built array is added in the projection area, a current coverage area of a camera window with the same shape as an array block in the array is detected, lamplight particles are distributed in the current coverage area according to a preset rule, lamplight rendering is carried out on the current rendering scene corresponding to the current coverage area, along with the movement of the camera window, the movement coverage area of the camera window in the array is determined, the lamplight particles in the current coverage area are transferred to a position corresponding to the coordinates of the array block of the movement coverage area, and lamplight rendering is carried out on the movement rendering scene corresponding to the movement coverage area, so that each lamplight particle is always distributed in the camera window according to the same coordinates, the regional effect overview is realized, the quantity of lamplight particles required to be rendered is reduced, and the running speed and the drawing efficiency are further effectively improved.

Description

Method, device and equipment for automatic generation and rendering of 3D night scene lights

technical field

The invention relates to the technical field of lighting rendering, in particular to a method, device and equipment for automatically generating and rendering three-dimensional night scene lighting.

Background technique

Lighting helps express emotions, guides the audience's eyes to a specific location, and can also provide greater depth to the scene, show rich layers, and make the model more three-dimensional and beautiful. The use of lighting has become a popular trend.

At present, the commonly used light rendering methods are as follows: first, advanced global illumination renderer and global illumination renderer, mainly based on "ray tracing" (ray trace) to trace rays between the surface of the model, the rays are constantly being drawn by some objects The surface reflects off other object surfaces until it disappears from the scene. Second, the radiosity rendering method, through the integrated cache irradiance calculation, the reflected energy bounces continuously in the scene, and the energy gradually weakens. Investigate light effects based on geometry, energy source, geographic location, date or material, or particle systems as light sources. Third, Lumaobject effect, Lumaobject makes self-illuminating objects as light sources, and can control light attenuation to achieve the effect of radiance to a certain extent, providing lighting effects in the form of incandescent lamps, three-dimensional light sources and special material properties. Fourth, Polygon Coloring Spotlight UV Master, through the BPR rendering function, uses the panorama as the background to fit the model, and serves as the lighting and coloring of the environment during rendering.

However, none of the lighting rendering methods in the prior art can realize one-click insertion of large-area lights, and can only be placed one by one, which cannot form a regional overview of effects. Moreover, when there are too many lights, the running speed is slow, which affects the drawing efficiency.

Contents of the invention

In view of this, the object of the present invention is to provide a method, device and equipment for automatic generation and rendering of 3D night scene lights, so as to overcome the fact that the current lighting rendering methods cannot realize one-key insertion of large-area lights, which can only be placed one by one and cannot be formed. An overview of regional effects, and the running speed is slow when there are too many lights, which affects the efficiency of drawing.

To achieve the above object, the present invention adopts the following technical solutions:

A method for automatically generating and rendering 3D night scene lights, comprising:

Obtain the preset surface of the rendered scene as the projection area;

Adding a pre-built array in the projection area; wherein, each array block of the array is provided with the same coordinate system;

Detecting the current coverage area of the camera window in the array whose shape and size are the same as any of the array blocks;

Distributing light particles in the current coverage area according to preset rules, and performing light rendering on the current rendering scene corresponding to the current coverage area;

determining a moving coverage area of the camera window in the array as the camera window moves;

Transfer the light particles in the current coverage area to the position corresponding to the array block coordinates of the mobile coverage area, and perform light rendering on the mobile rendering scene corresponding to the mobile coverage area;

The moving coverage area is used as the current coverage area when the camera window moves next time, so that each light particle is always distributed in the camera window according to the same coordinates.

Further, in the above-mentioned method for automatically generating and rendering three-dimensional night scene lights, each of the array blocks includes the same sub-array, and the number of sub-array blocks in the sub-array is the same as the number of light particles ;

The distributing light particles in the current coverage area according to preset rules includes:

determining a target sub-array block covered by the current coverage area among the sub-array blocks;

One light particle is placed at any position of each target sub-array block.

Further, in the above-mentioned method for automatically generating and rendering three-dimensional night scene lights, the array blocks and the sub-array blocks are square blocks connected to each other;

Before placing one light particle at any position of each target sub-array block, the method further includes:

The radius of the illumination range of each light particle is randomly set between 0 and N1; wherein, N1 is the side length of the sub-array block.

Further, in the above-mentioned method for automatically generating and rendering 3D night scene lights, the said light particles in the current coverage area are transferred to the positions corresponding to the array block coordinates of the mobile coverage area, include:

Determine the offset value of the light particles according to the following formula:

vOffset＝(vCell+floor(uCameraPositionMod+0.5－vCell)－uCameraPositionMod)×N2;

Wherein, vOffset is the offset value, vCell is the coordinate (i, j) of any light particle in the current coverage area, uCameraPositionMod is mod(CameraPosition, N2), and N2 is the position of the array block Side length, CameraPosition is the camera position;

Shifts the light particles by the offset value.

Further, in the method for automatically generating and rendering 3D night scene lights described above, performing light rendering on the current rendering scene corresponding to the current coverage area includes:

Determine the height attribute, color temperature attribute and halo attribute of the light particles in the current rendering scene;

The height attribute, the color temperature attribute and the halo attribute are superimposed on the light particles, so as to perform light rendering on the current rendering scene.

Further, in the above-mentioned method for automatically generating and rendering 3D night scene lights, performing light rendering on the mobile rendering scene corresponding to the mobile coverage area includes:

The height attribute, the color temperature attribute and the halo attribute are superimposed on the light particles to perform light rendering on the mobile rendering scene.

Further, in the above-mentioned method for automatically generating and rendering 3D night scene lights, the acquisition of the preset surface of the rendering scene as the projection area includes:

Obtain the top view surface of the rendering scene as the projection area.

The present invention also provides a device for automatically generating and rendering three-dimensional night scene lights, including:

An acquisition module, which is used to acquire the preset surface of the rendering scene as the projection area;

Adding module, for adding pre-built array in the projection area; wherein, each array block of the array is set with the same coordinate system;

A detection module, configured to detect the current coverage area of the camera window in the array whose shape and size are the same as any of the array blocks;

A rendering module, configured to distribute light particles in the current coverage area according to preset rules, and perform light rendering on the current rendering scene corresponding to the current coverage area;

A determining module, configured to determine a moving coverage area of the camera window in the array as the camera window moves;

The rendering module is further configured to transfer the light particles in the current coverage area to positions corresponding to the coordinates of the array block in the mobile coverage area, and render the mobile rendering scene corresponding to the mobile coverage area Perform light rendering; use the moving coverage area as the current coverage area when the camera window moves next time, so that each light particle is always distributed in the camera window according to the same coordinates.

Further, in the above-mentioned device for automatically generating and rendering three-dimensional night scene lights, each of the array blocks includes the same sub-array, and the number of sub-array blocks in the sub-array is the same as the number of the light particles ;

The rendering module is specifically configured to determine the target sub-array blocks covered by the current coverage area in the sub-array blocks; place one light particle at any position of each target sub-array block .

The present invention also provides a device for automatically generating and rendering three-dimensional night scene lights, including a processor and a memory, and the processor is connected to the memory:

Wherein, the processor is configured to call and execute the program stored in the memory;

The memory is used to store the program, and the program is at least used to execute the method for automatic generation and rendering of three-dimensional night scene lights described in any one of the above.

The method, device and equipment for automatic generation and rendering of three-dimensional night scene lights of the present invention, by obtaining the projection area of the rendering scene on the preset plane, adding a pre-built array in the projection area, wherein each array block of the array is Set the same coordinate system, detect the current coverage area of the camera window in the array with the same shape as the array block, distribute the light particles in the current coverage area according to the preset rules, and light the current rendering scene corresponding to the current coverage area Rendering, with the movement of the camera window, determine the mobile coverage area of the camera window in the array, and transfer the light particles in the current coverage area to the position corresponding to the coordinates of the array block of the mobile coverage area. Move the rendering scene for light rendering, and use the mobile coverage area as the current coverage area when the camera window moves next time, so that each light particle is always distributed in the camera window according to the same coordinates, achieving a regional overview of the effect, reducing The number of light particles that need to be rendered is reduced, thereby effectively improving the running speed and drawing efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a flow chart provided by an embodiment of the method for automatically generating and rendering three-dimensional night scene lights of the present invention;

Fig. 2 is a schematic diagram of a rendering scene provided by an embodiment of the method for automatically generating and rendering three-dimensional night scene lights of the present invention;

Fig. 3 is a schematic diagram of an array provided by an embodiment of the method for automatically generating and rendering three-dimensional night scene lights of the present invention;

Fig. 4 is a schematic diagram of an array block provided by an embodiment of the method for automatically generating and rendering three-dimensional night scene lights of the present invention;

FIG. 5 is a schematic diagram of the lighting rendering effect of area S in FIG. 2;

Fig. 6 is a structural schematic diagram provided by an embodiment of the device for automatically generating and rendering three-dimensional night scene lights of the present invention;

Fig. 7 is a schematic structural diagram provided by an embodiment of the device for automatically generating and rendering 3D night scene lights according to the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Fig. 1 is a flow chart provided by an embodiment of the method for automatically generating and rendering 3D night scene lights in the present invention. Referring to Figure 1, this embodiment may include the following steps:

S101. Obtain a preset surface of a rendering scene as a projection area.

In this embodiment, the projection area of the rendered scene on the preset plane may be obtained. In a specific implementation manner, the preset surface is a top view surface of the rendering scene. That is, the top view plane of the rendered scene is obtained as the projection area.

Fig. 2 is a schematic diagram of a rendering scene provided by an embodiment of the method for automatically generating and rendering 3D night scene lights according to the present invention. In a specific embodiment, the rendering scene includes several houses with different heights, as shown in FIG. 2 . In this embodiment, the top view of the rendered scene in FIG. 2 is obtained as the projection area.

S102. Add a pre-built array in the projection area.

In this embodiment, an array for rendering lights is pre-constructed, and the array includes several array blocks, and the same coordinate system is set in each array. Fig. 3 is a schematic diagram of an array provided by an embodiment of the method for automatically generating and rendering 3D night scene lights according to the present invention. As shown in FIG. 3 , if coordinates (i, j) exist in a certain array, i≥0, j>0. In all other remaining arrays, the same coordinate (i,j) can be found at the same location.

S103. Detect the current coverage area of the camera window in the array whose shape and size are the same as any array block.

The rendering scene corresponding to the area covered by the camera window is the area that the user can see through the display screen. In a specific implementation manner, the user can control the movement of the camera window by moving the mouse or other control devices, and then move the rendered scene corresponding to the area covered by the camera window to browse different parts of the rendered scene.

Wherein, the size and shape of the camera window are the same as any array block. In this way, no matter where the camera window is in the array, the area covered by the camera window in the array will include all the coordinates contained in a complete array block coordinate system.

Specifically, as shown in FIG. 3 , if the camera window is at position A and aligned with one of the array blocks, then the coverage area of the camera window includes all the coordinates of the array block coordinate system. If the camera window is at position B, the coordinates of the area b11 covered by the camera window and the area b12 not covered by the camera window are the same, and the coordinates of the area b21 covered by the camera window are corresponding to the area b22 not covered by the camera window. In this way, b12, b22 and b3 form a complete array of all coordinates contained in the block coordinate system. Therefore, no matter how the camera window moves, the area covered by the camera window in the array will include all the coordinates contained in a complete array block coordinate system, that is, the coordinate (i, j) will be included.

In this embodiment, after adding the pre-built array in the projection area, it is necessary to detect the initial position of the camera window and the current coverage area corresponding to the initial position.

S104. Distribute light particles in the current coverage area according to a preset rule, and perform light rendering on the current rendering scene corresponding to the current coverage area.

In this embodiment, each array block includes the same sub-array, and the number of sub-array blocks in the sub-array is the same as the number of light particles. After determining the current coverage area of the camera window, the light particles can be distributed in the current coverage area according to the preset rules according to the following steps.

Step 1: Determine the target sub-array block covered by the current coverage area among the sub-array blocks.

Step 2: Place a light particle anywhere in each target subarray block.

Fig. 4 is a schematic diagram of an array block provided by an embodiment of the method for automatically generating and rendering 3D night scene lights in the present invention. In a specific implementation manner, the target sub-array block covered by the current coverage area is shown in the shaded area C in Figure 4. In order to improve the scene lighting complexity and visual impact, the current coverage area shown in Figure 4 A light particle L is placed in each covered target subarray block.

Since the complexity of lighting rendering is directly related to the number of lights received by each pixel, in this embodiment, in order to limit the complexity of lighting calculations for the entire scene, both the array block and the sub-array block are set as square blocks connected to each other , as shown in Figure 3 and Figure 4. And, before the above step two, the following steps may also be included:

Randomly set the radius of the illumination range of each light particle between 0 and N1; where N1 is the side length of the subarray block. Specifically, if the radius of the illumination range of each light particle is within the side length of the sub-array block, then the influence range of each light particle is the sub-array block where it is located and its 8 adjacent sub-array blocks. In this way, each sub-array block will be affected by a total of 9 light particles in itself and 8 adjacent sub-array blocks at most, which effectively reduces the complexity of lighting calculations.

As shown in Figure 4, the light particle L1 in the dotted line box represents a limit case, that is, the position of the light particle in the dotted line box happens to be at the corner of the sub-array block at random, and the influence radius is exactly N1 at random. At this time, the influence range of the light particle does not exceed the sub-array block where it is located and the surrounding sub-array blocks. Therefore, under this strategy, it can be randomly randomized without cross-border phenomenon, and at the same time, it can greatly improve the lighting complexity. Spend.

In this step, the height attribute, color temperature attribute and halo attribute of the light particles in the current rendering scene can also be determined. Overlay the height attribute, color temperature attribute and halo attribute to the light particles to perform light rendering on the current rendering scene. Among them, the height attribute can be determined according to the height information in the current rendering scene, and the halo attribute and color temperature attribute can be determined according to the position of the light particles.

FIG. 5 is a schematic diagram of lighting rendering effects in area S in FIG. 2 . In a specific implementation, the top view of area S in FIG. 1 corresponds to the current coverage area in FIG. 4 , and according to the distribution of light particles shown in FIG. The area S is rendered, and the rendered image shown in FIG. 5 can be obtained, that is, the rendered image corresponding to the camera window seen by the user through the display screen.

S105. As the camera window moves, determine a moving coverage area of the camera window in the array.

If the user needs to view the lighting effects in other areas, he needs to move the mouse or other control devices to switch the coverage of the camera window. In this embodiment, as the camera window moves continuously, the moving coverage area of the camera window in the array is determined.

S106. Transfer the light particles in the current coverage area to the position corresponding to the coordinates of the array block in the mobile coverage area, and perform light rendering on the mobile rendering scene corresponding to the mobile coverage area.

Through the above analysis, the following conclusions can be clearly drawn:

No matter where the camera window is in the array, the area covered by the camera window in the array will include all the coordinates contained in a complete array block coordinate system.

Then, the light particles in the current coverage area can be transferred to the position corresponding to the coordinates of the array block in the mobile coverage area according to the corresponding relationship of coordinates, so that the user cannot feel the movement of the light particles during the process of moving the camera window, and at the same time Effectively improve rendering efficiency.

Specifically, the offset value of the light particles is determined according to the following formula, and the light particles can be transferred according to the offset value.

The formula is: vOffset=(vCell+floor(uCameraPositionMod+0.5－vCell)－uCameraPositionMod)×N2;

Among them, vOffset is the offset value, vCell is the coordinate (i,j) of any light particle in the current coverage area, uCameraPositionMod is mod(CameraPosition,N2), N2 is the side length of the array block, and CameraPosition is the corresponding camera window camera position.

If each array block contains sub-array blocks whose number is a×a, then:

N2=N1×a

It should be noted that the moving coverage area is used as the current coverage area when the camera window moves next time, so that each light particle is always distributed in the camera window according to the same coordinates, and the user will never feel the movement of the light particles and will not affect User experience effect.

In addition, in a specific real-time manner, if the camera window does not move, this embodiment will also re-determine the coverage area of the camera window in the array, so as to repeatedly perform light particle calculation and light rendering on the coverage area. Compared with repeated saving and reading of data, repeated calculations can further improve the rendering speed of lights.

The method for automatically generating and rendering three-dimensional night scene lights in this embodiment obtains the projection area of the rendering scene on a preset plane, and adds a pre-built array in the projection area, wherein each array block of the array is set with the same coordinate system, detect the current coverage area of the camera window in the array with the same shape as the array block, distribute the light particles in the current coverage area according to the preset rules, perform light rendering on the current rendering scene corresponding to the current coverage area, and then With the movement of the camera window, determine the mobile coverage area of the camera window in the array, transfer the light particles in the current coverage area to the position corresponding to the coordinates of the array block in the mobile coverage area, and render the scene corresponding to the mobile coverage area Perform lighting rendering, and use the mobile coverage area as the current coverage area when the camera window moves next time, so that each light particle is always distributed in the camera window according to the same coordinates, achieving a regional effect overview and reducing the need for The number of light particles rendered can effectively improve the running speed and drawing efficiency.

The present invention also provides a device for automatically generating and rendering three-dimensional night scene lights, which is used to realize the above-mentioned method embodiments. Fig. 6 is a schematic structural diagram provided by an embodiment of the device for automatically generating and rendering 3D night scene lights according to the present invention. As shown in Figure 6, the device of this embodiment includes:

An acquisition module 11, configured to acquire a preset surface of a rendering scene as a projection area;

The adding module 12 is used to add a pre-built array in the projection area; wherein, each array block of the array is provided with the same coordinate system;

The detection module 13 is used to detect the current coverage area of the camera window in the array whose shape and size are the same as any array block;

The rendering module 14 is configured to distribute light particles in the current coverage area according to preset rules, and perform light rendering on the current rendering scene corresponding to the current coverage area;

Determining module 15 is used for determining the mobile coverage area of the camera window in the array along with the movement of the camera window;

The rendering module 14 is also used to transfer the light particles in the current coverage area to the position corresponding to the array block coordinates of the mobile coverage area, and perform light rendering on the mobile rendering scene corresponding to the mobile coverage area; use the mobile coverage area as the camera window The current coverage area for the next move, so that each light particle is always distributed within the camera viewport at the same coordinates.

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

Further, in the device for automatically generating and rendering three-dimensional night scene lights in this embodiment, each array block includes the same sub-array, and the number of sub-array blocks in the sub-array is the same as the number of light particles;

The rendering module 14 is specifically configured to determine the target sub-array blocks covered by the current coverage area in the sub-array blocks, and place a light particle at any position of each target sub-array block.

Further, in the device for automatically generating and rendering three-dimensional night scene lights in this embodiment, the array blocks and the sub-array blocks are square blocks connected to each other;

The rendering module 14 is specifically configured to randomly set the radius of the illumination range of each light particle between 0 and N1; wherein, N1 is the side length of the sub-array block.

Further, the device for automatically generating and rendering 3D night scene lights in this embodiment, the rendering module 14, is specifically used to determine the offset value of light particles according to the following formula:

vOffset＝(vCell+floor(uCameraPositionMod+0.5－vCell)－uCameraPositionMod)×N2;

Among them, vOffset is the offset value, vCell is the coordinate (i, j) of any light particle in the current coverage area, uCameraPositionMod is mod(CameraPosition, N2), N2 is the side length of the array block, and CameraPosition is the camera position;

Shifts light particles by offset.

Further, in the device for automatically generating and rendering 3D night scene lights in this embodiment, the rendering module 14 is specifically used to determine the height attribute, color temperature attribute, and halo attribute of light particles in the current rendering scene, and set the height attribute, color temperature attribute, and halo attribute to Superimposed into light particles for light rendering of the currently rendered scene.

Further, the rendering module 14, the device for automatically generating and rendering 3D night scene lights in this embodiment, is specifically used to superimpose the height attribute, color temperature attribute and halo attribute into the light particles, so as to perform light rendering on the mobile rendering scene.

Furthermore, in the apparatus for automatically generating and rendering 3D night scene lights in this embodiment, the acquiring module 11 is specifically used to acquire the top view surface of the rendered scene as the projection area.

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

The present invention also provides a device for automatically generating and rendering three-dimensional night scene lights, which is used to realize the above method embodiment. Fig. 7 is a schematic structural diagram provided by an embodiment of the device for automatically generating and rendering 3D night scene lights according to the present invention. As shown in FIG. 7 , the device for automatically generating and rendering 3D night scene lights in this embodiment includes a processor 21 and a memory 22 , and the processor 21 is connected to the memory 22 . Wherein, the processor 21 is used to call and execute the program stored in the memory 22; the memory 22 is used to store the program, and the program is at least used to execute the method for automatically generating and rendering the 3D night scene light in the above embodiment.

In a specific implementation manner, the processor 21 includes a graphics card, and the storage 22 includes a video memory.

For the specific implementation of the device for automatically generating and rendering 3D night scene lights provided in the embodiments of the present application, reference may be made to the implementation of the method for automatically generating and rendering 3D night scene lights in any of the above embodiments, which will not be repeated here.

It can be understood that, the same or similar parts in the above embodiments can be referred to each other, and the content that is not described in detail in some embodiments can be referred to the same or similar content in other embodiments.

It should be noted that, in the description of the present invention, terms such as "first" and "second" are only used for description purposes, and should not be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" means at least two.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments or portions of code comprising one or more executable instructions for implementing specific logical functions or steps of the process , and the scope of preferred embodiments of the invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including substantially concurrently or in reverse order depending on the functions involved, which shall It is understood by those skilled in the art to which the embodiments of the present invention pertain.

It should be understood that various parts of the present invention can be realized by hardware, software, firmware or their combination. In the embodiments described above, various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

Those of ordinary skill in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. During execution, one or a combination of the steps of the method embodiments is included.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, each unit may exist separately physically, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are implemented in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (6)

1. A method for automatic generation and rendering of three-dimensional night scene lights, characterized in that, comprising: Obtain the preset surface of the rendered scene as the projection area; Add a pre-built array in the projection area; wherein, each array block of the array is provided with the same coordinate system; each array block includes the same sub-array, and the sub-arrays in the sub-array The number of subarray blocks is the same as the number of light particles; Detecting the current coverage area of the camera window in the array whose shape and size are the same as any of the array blocks; Distributing light particles in the current coverage area according to preset rules, and performing light rendering on the current rendering scene corresponding to the current coverage area; wherein, distributing light particles in the current coverage area according to preset rules , including: determining the target sub-array block covered by the current coverage area in the sub-array block; randomly setting the illumination range radius of each light particle between 0 and N1; wherein, N1 is the The side length of the sub-array block; one light particle is placed at any position of each target sub-array block; the array block and the sub-array block are square blocks connected to each other ; determining a moving coverage area of the camera window in the array as the camera window moves; Transfer the light particles in the current coverage area to the position corresponding to the array block coordinates of the mobile coverage area, and perform light rendering on the mobile rendering scene corresponding to the mobile coverage area; wherein, the Transferring the light particles in the current coverage area to the position corresponding to the coordinates of the array block in the mobile coverage area includes: determining the offset value of the light particles according to the following formula: vOffset=(vCell+floor(uCameraPositionMod+0.5-vCell)-uCameraPositionMod)×N2; Among them, vOffset is the offset value, vCell is the coordinate (i, j) of any light particle in the current coverage area, uCameraPositionMod is mod(CameraPosition, N2), and N2 is the position of the array block Side length, CameraPosition is the camera position; transfer the light particles according to the offset value; The moving coverage area is used as the current coverage area when the camera window moves next time, so that each light particle is always distributed in the camera window according to the same coordinates. 2. The method for automatically generating and rendering three-dimensional night scene lights according to claim 1, wherein said performing light rendering on the current rendering scene corresponding to the current coverage area comprises: Determine the height attribute, color temperature attribute and halo attribute of the light particles in the current rendering scene; The height attribute, the color temperature attribute and the halo attribute are superimposed on the light particles, so as to perform light rendering on the current rendering scene. 3. The method for automatically generating and rendering three-dimensional night scene lights according to claim 2, wherein said performing light rendering on the mobile rendering scene corresponding to the mobile coverage area comprises: The height attribute, the color temperature attribute and the halo attribute are superimposed on the light particles to perform light rendering on the mobile rendering scene. 4. The method for automatic generation and rendering of three-dimensional night scene lights according to claim 1, wherein the acquisition of the preset surface of the rendering scene as a projection area includes: Obtain the top view surface of the rendering scene as the projection area. 5. A device for automatically generating and rendering three-dimensional night scene lights, characterized in that it comprises: An acquisition module, which is used to acquire the preset surface of the rendering scene as the projection area; The adding module is used to add a pre-built array in the projection area; wherein, each array block of the array is provided with the same coordinate system; each of the array blocks includes the same sub-array, so The number of subarray blocks in the subarray is the same as the number of light particles; A detection module, configured to detect the current coverage area of the camera window in the array whose shape and size are the same as any of the array blocks; A rendering module, configured to distribute light particles in the current coverage area according to preset rules, and perform light rendering on the current rendering scene corresponding to the current coverage area; wherein, the light particles are distributed in the current coverage area according to preset rules In the current coverage area; it is specifically used to determine the target sub-array block covered by the current coverage area in the sub-array block; randomly set the illumination range radius of each of the light particles between 0 and N1; Wherein, N1 is the side length of the sub-array block; one light particle is placed at any position of each target sub-array block; the array block and the sub-array block are mutually contiguous square blocks; A determining module, configured to determine a moving coverage area of the camera window in the array as the camera window moves; The rendering module is further configured to transfer the light particles in the current coverage area to positions corresponding to the coordinates of the array block in the mobile coverage area, and render the mobile rendering scene corresponding to the mobile coverage area Perform light rendering; use the moving coverage area as the current coverage area when the camera window moves next time, so that each light particle is always distributed in the camera window according to the same coordinates; wherein, the Transfer the light particles in the current coverage area to the position corresponding to the coordinates of the array block in the mobile coverage area; the rendering module is specifically used to determine the offset of the light particles according to the following formula value: vOffset=(vCell+floor(uCameraPositionMod+0.5-vCell)-uCameraPositionMod)×N2; Among them, vOffset is the offset value, vCell is the coordinate (i, j) of any light particle in the current coverage area, uCameraPositionMod is mod(CameraPosition, N2), and N2 is the position of the array block Side length, CameraPosition is the camera position; transfer the light particles according to the offset value. 6. A device for automatic generation and rendering of three-dimensional night scene lighting, characterized in that it includes a processor and a memory, and the processor is connected to the memory: Wherein, the processor is configured to call and execute the program stored in the memory; The memory is used to store the program, and the program is at least used to execute the method for automatically generating and rendering three-dimensional night scene lights according to any one of claims 1-4.