CN117475053A - Grass rendering method and device - Google Patents

Abstract

The application discloses a grassland rendering method and device, which acquire a rendering center in a rendering area; determining a grass insert based on a rendering distance between a unit area in the rendering area and the rendering center, the grass insert including at least one vertex, the number of vertices in the grass insert being inversely related to the rendering distance; a grass blade is inserted into the unit area. The method reduces the risk of processing expenditure caused by excessive number of the vertexes of the rendering due to more vertexes of each inserted grass insert sheet, also reduces the risk of poor rendering effect caused by excessive number of the vertexes of the rendering due to too few vertexes of each inserted grass insert sheet, gives consideration to the rendering effect and the processing expenditure of the rendering, improves the performance and the resource utilization efficiency of a computer as far as possible without sacrificing the rendering effect, and improves the density of grass at the same time, so that the virtual scene is more vivid and fine.

Description

Grass rendering method and device

Technical field

The present application relates to the field of computer technology, and specifically to a grass rendering method and device.

Background technique

In order to render the effect of grass in the terrain, the rendering area is usually manually selected in the rendering area and grass inserts are inserted into the selected rendering area. Each grass patch is a polygon mesh with a fixed number of vertices. For example, either each inserted grass patch is a triangle with three vertices, or each inserted grass patch is a rhombus with four vertices and two triangles.

However, when using the above method, if each inserted grass insert is a triangle with three vertices, the rendering effect will be poor and it will be difficult to simulate the shape of grass realistically; if each inserted grass insert is a triangle For a rhombus with four vertices, the hardware responsible for rendering in the computing device needs to render too many vertices, resulting in excessive processing overhead for rendering on the computing device.

In view of this, in the scene of rendering grass, further research and discussion are needed on how to take into account the rendering effect and rendering processing overhead to a certain extent.

Contents of the invention

This application provides a grassland rendering method and device, which can take into account the rendering effect and rendering processing overhead to a certain extent. The technical solution is as follows.

In a first aspect, a grass rendering method is provided, and the method includes:

Get the rendering center in the rendering area;

Based on the rendering distance between the unit area in the rendering area and the rendering center, a grass patch is determined, the grass patch includes at least one vertex, and the number of vertices in the grass patch is negatively related to the rendering distance. ;

Insert the grass insert into the unit area.

In a possible implementation, the grass insert includes a first grass insert and a second grass insert, and the number of vertices in the first grass insert is greater than the number of vertices in the second grass insert. , the step of determining grass inserts based on the rendering distance between the unit area in the rendering area and the rendering center includes:

In response to determining that the rendering distance is less than or equal to a distance threshold, determining the first grass patch; or,

The second grass insert is determined in response to determining that the rendering distance is greater than or equal to a distance threshold.

In a possible implementation, determining the grass insert based on the rendering distance between the unit area in the rendering area and the rendering center includes:

A grass patch is determined based on the rendering distance and a first correspondence, the first correspondence indicates a correspondence between the rendering distance and a first number, the number of vertices in the grass patch is the third A quantity.

In a possible implementation, inserting the grass insert into the unit area includes:

Determine the number of grass inserts based on the rendering data within the unit area;

The said number of said grass inserts are inserted into said unit area.

In a possible implementation, the rendering data includes the proportion of grass texture in the unit area, and determining the number of grass inserts based on the rendering data of the unit area includes:

The number of grass inserts is determined based on the proportion of grass texture in the unit area, and the number of grass inserts is positively related to the proportion of grass texture.

In a possible implementation, the rendering data includes color data of pixels in the unit area, and determining the number of grass inserts based on the rendering data in the unit area includes:

The number of grass inserts is determined based on the ratio between the color data of the pixel and the grass color threshold.

In a possible implementation, determining the number of grass inserts based on the ratio between the color data of the pixel and the grass color threshold includes:

Determine the number of grass inserts based on the ratio between the average color data of each pixel in the unit area and the grass color threshold; or,

Determine the number of grass inserts based on the ratio between the color data of the central pixel in the unit area and the grass color threshold; or,

The number of grass inserts is determined based on the ratio between the average color data of the pixels at each corner point in the unit area and the grass color threshold.

In a possible implementation, before determining the grass insert based on the rendering distance between the unit area in the rendering area and the rendering center, the method further includes:

It is determined that the rendering data of the unit area satisfies the grass texture characteristics.

In a possible implementation, before obtaining the rendering center in the rendering area, the method further includes:

A rendering area is determined based on the location of the virtual object and a preset radius, and the difference between the boundary of the rendering area and the location of the virtual object is the preset radius.

In a possible implementation, obtaining the rendering center in the rendering area includes:

Get the position of the virtual object as the rendering center.

In a second aspect, a grass rendering device is provided, which device includes:

Get module, used to get the rendering center in the rendering area;

Determining module, configured to determine grass inserts based on the rendering distance between the unit area in the rendering area and the rendering center. The grass inserts include at least one vertex, and the number of vertices in the grass inserts is equal to the number of vertices in the grass inserts. The rendering distance is negatively related;

A rendering module, configured to insert the grass insert into the unit area.

In a possible implementation, the grass insert includes a first grass insert and a second grass insert, and the number of vertices in the first grass insert is greater than the number of vertices in the second grass insert. , the determination module is configured to determine the first grass patch in response to determining that the rendering distance is less than or equal to a distance threshold; or, in response to determining that the rendering distance is greater than or equal to a distance threshold, determine the second Grass inserts.

In a possible implementation, the determining module is configured to determine grass inserts based on the rendering distance and a first correspondence, the first correspondence indicating the rendering distance and a first number of Correspondingly, the number of vertices in the grass insert is the first number.

In a possible implementation, the determining module is used to determine the number of grass inserts based on the rendering data in the unit area; the rendering module is used to insert all the grass inserts into the unit area. The stated number of said grass inserts.

In a possible implementation, the rendering data includes a proportion of grass texture in the unit area, and the determination module is configured to determine the grass insert based on the proportion of grass texture in the unit area. The number of grass inserts is positively related to the proportion of the grass texture.

In a possible implementation, the rendering data includes color data of pixels in the unit area, and the determination module is configured to determine based on the ratio between the color data of the pixels and the grass color threshold. The number of grass inserts.

In a possible implementation, the determination module is configured to determine the number of grass inserts based on the ratio between the average color data of each pixel in the unit area and the grass color threshold; Or, determine the number of grass inserts based on the ratio between the color data of the central pixel in the unit area and the grass color threshold; or, determine the number of grass inserts based on the color data of the pixels at each corner point in the unit area. The ratio between the average and the grass color threshold determines the number of grass inserts.

In a possible implementation, the determination module is configured to determine that the rendering data of the unit area satisfies grass texture characteristics.

In a possible implementation, the determination module is also used to determine the rendering area based on the location of the virtual object and the preset radius. The difference between the boundary of the rendering area and the location of the virtual object is the preset radius.

In a possible implementation, the obtaining module is used to obtain the position of the virtual object as a rendering center.

In a third aspect, a server is provided. The server includes: a processor, the processor is coupled to a memory, and at least one computer program instruction is stored in the memory. The at least one computer program instruction is generated by the processor. Load and execute, so that the server implements the method described in the above first aspect or any optional method of the first aspect.

In a fourth aspect, a computer-readable storage medium is provided. At least one instruction is stored in the storage medium. When the instruction is run on a computer, it causes the computer to execute the above-mentioned first aspect or any one of the first optional aspects. method as described.

In a fifth aspect, a computer program product is provided. The computer program product includes one or more computer program instructions. When the computer program instructions are loaded and run by a computer, they cause the computer to execute the first aspect or the third aspect. On the one hand, the method described in any of the optional ways.

In a sixth aspect, a chip is provided. The chip includes programmable logic circuits and/or program instructions. When the chip is run, it is used to implement the method described in the above-mentioned first aspect or any alternative method of the first aspect.

A seventh aspect provides a server cluster. The server cluster includes a first server and a second server. The first server and the second server are used to collaboratively implement the above-mentioned first aspect or any optional method of the first aspect. Methods.

It can be seen that the embodiments of the present application have the following beneficial effects:

Since the number of vertices in the grass patch is inversely related to the rendering distance, the farther the unit area is from the rendering center, the smaller the number of grass inserts that can be inserted, and the unit area closer to the rendering center can insert the number of grass inserts. The more vertices are inserted, the risk of processing overhead caused by too many vertices being rendered will be reduced, and the risk of rendering processing overhead caused by too few vertices being inserted for each grass insert will be reduced. Excessive number of vertices leads to the risk of poor rendering effect. Taking into account the rendering effect and rendering processing overhead, try to improve the computer performance and resource utilization efficiency without sacrificing the rendering effect, and at the same time increase the density of grass to make the virtual scene More realistic and detailed.

Description of the drawings

Figure 1 is a flow chart of a grass rendering method provided by an embodiment of the present application;

Figure 2 is a schematic diagram of terrain grid data provided by an embodiment of the present application;

Figure 3 is a schematic structural diagram of a grass rendering device provided by an embodiment of the present application;

Figure 4 is a schematic structural diagram of a server provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Figure 1 is a flow chart of a grass rendering method provided by an embodiment of the present application. The method shown in Figure 1 includes the following steps S110 to S130.

Step S110: Obtain the rendering center in the rendering area.

The rendering area can be a sub-area within the terrain grid area. A terrain grid area consists of one or more rendering areas. In one possible implementation, the terrain grid area is divided according to preset rules to obtain one or more rendering areas.

In one possible implementation of determining the rendering area, the size of the rendering area is determined. Determine the number of rendering areas that need to be divided based on the total size of the terrain grid area and the size of the rendering area. The complete terrain grid area is divided according to the determined size and number of rendering areas. You can use the equal division method to divide the terrain grid area into rendering areas of the same size. Terrain grid areas can also be divided unevenly based on specific needs and terrain characteristics to better fit different parts of the terrain. For example, when the terrain changes greatly or there are many details, the size of the rendering area can be set smaller to depict the details of the terrain more finely. When the terrain changes slowly or there are few details, the size of the rendering area can be set larger to reduce the amount of rendering calculations.

By dividing the terrain grid area into one or more rendering areas, it helps to split the complex terrain rendering process (rendering for the entire terrain grid area) into multiple smaller rendering tasks (rendering for one rendering area). rendering), thereby facilitating parallel processing (such as rendering multiple rendering areas in parallel), thereby improving rendering performance and efficiency. By rendering each rendering area, the entire terrain grid area is rendered.

In another possible implementation of determining the rendering area, the rendering area is determined from the terrain grid area as needed. For example, based on the position of the virtual object in the terrain grid area and the preset radius, the rendering area is determined from the terrain grid area, and the difference between the boundary of the rendering area and the position of the virtual object is the preset radius. Optionally, when there are N virtual objects in the terrain grid area, N rendering areas are determined based on the N virtual objects, and the i-th rendering area among the N rendering areas includes the i-th virtual object, where N is A positive integer greater than or equal to 1, i is a positive integer less than or equal to N.

Virtual objects are, for example, objects in a game. The virtual object is, for example, a virtual character, for example, the virtual object is a game character. Game characters have models, animations, and interactive behaviors that allow them to move freely in the game world and interact with other objects. For another example, the virtual object is a virtual prop item, for example, the virtual object is a collectible treasure, weapon, equipment or other gain item. Alternatively, the virtual object is an enemy or monster designed to engage in combat or other forms of interaction with the player. Alternatively, the virtual object is an environmental object in the game scene, such as virtual trees, virtual buildings, virtual rocks, etc. Alternatively, the virtual object is an NPC (non-player character), and the NPC is a virtual object controlled by the game program. NPCs can be merchants, residents, or other characters that provide services such as tasks, conversations, or purchases. Users can interact with NPCs to obtain tasks, obtain information, or exchange items. Alternatively, the virtual object is a game mission goal.

The location of the virtual object is, for example, the two-dimensional coordinates or the three-dimensional coordinates of the virtual object. As a possible implementation method to determine the rendering area based on the position of the virtual object, use the position of the virtual object as the center of the sphere, set a radius, and select all pixels that are less than or equal to the radius from the center of the sphere as within the rendering area. pixel. The distance between a pixel and the center of the sphere can be obtained by calculating the Euclidean distance. For example, if the position of the virtual object is (x, y, z) and the preset radius is r, then the boundary of the rendering area can be defined as a spherical area with the virtual object position as the center and a radius of r. As another possible way to determine the rendering area based on the position of the virtual object, use the position of the virtual object as the center point of the rectangle, set a width and length, and calculate the horizontal and vertical distances between the virtual object and a certain pixel. To determine whether the pixel is within the rectangular area, thereby determining whether the pixel belongs to the rendering area. As another possible way to determine the rendering area based on the position of the virtual object, use the position of the virtual object as the center of the circle, set a radius, and select pixels that are less than or equal to the radius from the center of the circle as pixels in the rendering area. .

Since the rendering area is limited to the area around the virtual object, compared to rendering the entire terrain grid area, there is no need to render areas far away from the virtual object, thus reducing the calculation amount of processor rendering and saving rendering time. The memory space occupied by the process reduces the computer hardware requirements required for rendering. In addition, by rendering the area around the avatar with a grass texture, the area around the avatar is in sharp contrast with other areas. For example, the green color and rich details of the grass texture can make the avatar more conspicuous and help players focus on On virtual characters, it enhances the presence of virtual characters in the game scene.

In one possible implementation, the position of the virtual object in the rendering area is obtained, and the position of the virtual object in the rendering area is used as the rendering center. By using the position of the virtual object in the rendering area as the rendering center, when determining the rendering area based on the position of the virtual object, virtual objects were also used when the terrain grid area was divided into multiple rendering areas. Parameters of the location of the object, so when determining the rendering center, the previously obtained position of the virtual object can be directly reused without having to obtain the position of the virtual object again, which reduces the amount of data processing and thus improves efficiency.

Step S120, determine the grass insert based on the rendering distance between the unit area in the rendering area and the rendering center.

Grass inserts are small patch-like elements used to represent grass. A grass insert represents a small clump or blade of grass in a real meadow. Grass inserts usually have a flat or nearly flat geometry. Grass inserts include at least one vertex. For example, a grass patch can have four vertices, and a grass patch can have a rhombus geometry or a rectangle geometry. A grass patch can also have three vertices, and a grass patch can have a triangular geometry. Of course, three vertices and four vertices are only examples of the number of vertices of a grass patch. A grass patch can also have five vertices, a grass patch can have an irregular polygon shape, or a grass patch can also have five vertices. Can have six vertices, and grass inserts can have a convex hexagonal shape. Grass inserts are also available as 3D models.

In one possible implementation of obtaining the grass insert, determine the number of vertices of the grass insert, and create a geometry with the number of vertices based on the number of vertices of the grass insert; map the grass texture to the geometry to obtain a grass Insert. Among them, the grass map includes the characteristics of the grass, such as the color of the grass, the texture and transparency of the grass, etc.

Generally, the greater the number of vertices of a grass patch, the richer geometric details, smoother surfaces, and more detailed texture mapping can be provided. The higher the accuracy, the better the rendering effect, but increasing the number of vertices of the grass patch will also This leads to more vertex calculations and rendering operations, resulting in higher hardware requirements; conversely, the fewer the number of vertices of the grass insert, the appearance of the grass is relatively simplified or rough, and the lower the precision, resulting in a decrease in the rendering effect, but It can also reduce vertex calculation and rendering operations, thus reducing hardware requirements.

For example, when four vertices are used to form two triangular diamond-shaped grass patches, the grass patch is closer to the appearance of real grass, but each grass patch needs to render four vertices, which has higher hardware requirements. In contrast, grass inserts that use three vertices to form a triangle are slightly less realistic, but can reduce hardware requirements.

In order to take into account the rendering effect and rendering processing overhead, the grass inserts that need to be inserted into the unit area can be determined based on the rendering distance between the unit area and the rendering center in the rendering area. The number of vertices in the grass inserts and the relationship between the unit area and the rendering The rendering distance between centers is negatively correlated. In other words, the closer the rendering distance between the unit area and the rendering center, the more vertices of the grass inserts inserted into the unit area, making the rendering effect more realistic, and the farther the rendering distance between the unit area and the rendering center. , the fewer the vertices of the grass inserts inserted into the unit area, thereby reducing the processing overhead caused by rendering and reducing hardware requirements. In particular, when the position of the virtual character is used as the rendering center, the grass far away from the virtual character appears with less details and a smaller number of vertices, while the grass near the virtual character appears with more details and vertices. Quantitative forms, thereby simulating a visual perspective effect and enhancing the realism and three-dimensionality of the game.

In a possible implementation, the grass patch includes a first grass patch and a second grass patch. The number of vertices in the first grass patch is greater than the number of vertices in the second grass patch. The rendering distance and distance threshold are A comparison is made; in response to determining that the rendering distance is less than or equal to the distance threshold, a first grass patch is determined; or in response to determining that the rendering distance is greater than or equal to the distance threshold, a second grass patch is determined. For example, when it is determined that the rendering distance is less than or equal to the distance threshold, a grass patch with four vertices (the first grass patch) is determined, a grass patch with four vertices is inserted into the unit area, and when it is determined that the rendering distance is greater than or equal to the distance Threshold, determine the grass patch with three vertices (the second grass patch), and insert the grass patch with three vertices into the unit area. The distance threshold can be set according to the size of the terrain grid area or rendering area or the requirements of the rendering effect.

In another possible implementation, the grass insert is determined based on the rendering distance and the first correspondence. The first correspondence indicates a correspondence between the rendering distance and a first number, the number of vertices in the grass patch being the first number. Correspondence can be expressed using arrays, tables or functions. For example, using the rendering distance as an index, the first correspondence relationship in table form is searched to obtain the first number; the grass inserts having the first number of vertices are screened from the candidate grass inserts. The correspondence between the rendering distance and the first quantity can be calculated using linear interpolation. Alternatively, use an exponential function to represent the correspondence between the rendering distance and the number of vertices, so that the number of vertices at far distances decreases exponentially. Or, use curve functions, polynomials, etc. to fit the first correspondence relationship in the form of a nonlinear function to obtain a more accurate number of vertices.

Step S130: Insert grass inserts into the unit area.

In one possible implementation, before inserting the grass inserts, it is determined whether the rendering data of the unit area satisfies the grass texture characteristics; if the rendering data of the unit area satisfies the grass texture characteristics, then the step of determining the grass inserts based on the rendering distance is performed. ; If the rendering data of the unit area does not meet the grass texture characteristics, the step of determining the grass inserts is cancelled. Since there is no need to manually select the grass area, the labor cost caused by manually selecting the grass area is saved and the rendering efficiency is improved. In addition, when the rendering data of the unit area does not meet the grass texture characteristics, there is no need to insert grass inserts. This is equivalent to filtering out some areas that are not suitable for inserting grass inserts before inserting grass inserts, thereby reducing the need to insert grass in unnecessary areas. The probability of inserting slices, thereby reducing rendering load and resource consumption.

In one possible implementation method of determining that the rendering data of the unit area satisfies the grass texture characteristics, the number of target pixels in the unit area is determined based on the color data of the pixels in the unit area and the grass color interval; based on the target pixels in the unit area quantity, determine that the rendering data of the unit area satisfies the grass texture characteristics, and insert grass inserts into the unit area.

The grass color range refers to a range used to describe the color characteristics of grass. For example, in the RGB space, the grass color interval can include the range of R, G, and B components; in the HSV space, the grass color interval can include H (hue), S (saturation), and V (brightness) components. range. In one possible implementation manner of determining the grass color interval, real grass images are sampled to determine the grass color interval. For example, collect a variety of real grass pictures, including photos of grass in different scenes and under different lighting conditions. Select sample images representing grass color from these real grass pictures, and extract color data from the sample images as grass color intervals. Optionally, based on environmental conditions corresponding to the grass image, such as sunlight intensity, shadows, reflections of surrounding objects and other factors, the determined range of the grass color interval is adjusted so that the grass color interval can include changes in grass color under different environments.

The target pixel refers to the pixel whose color data belongs to the grass color interval. For example, compare the color data of a pixel with the upper and lower bounds of the grass color range. If the color data of the pixel is within the grass color range, the pixel is the target pixel. Considering that color data is usually defined through multiple color channels, in one possible implementation, the value of each color channel in the color data of a pixel is compared with the upper and lower bounds of the corresponding channel in the grass color interval. If a If the value of each color channel in the color data of a pixel belongs to the upper and lower bounds of the corresponding channel, then the pixel is the target pixel. Taking the RGB space as an example, if the value of a pixel in the red channel is within the upper and lower bounds of the red channel of the grass color interval, and the value of the pixel in the green channel is within the upper and lower bounds of the green channel of the grass color interval, , and the value of the pixel in the blue channel is within the upper and lower bounds of the blue channel in the grass color interval, then the pixel is the target pixel.

In one possible implementation, each pixel in the unit area is traversed. For the currently traversed pixel, if the color data of the pixel is within the defined grass color interval, the pixel is determined to be the target pixel. point, add one to the number of recorded target pixels, until the last pixel in the unit area is traversed, and output the number of recorded target pixels.

In one possible implementation, the number of target pixels in the unit area is compared with a quantity threshold. When it is determined that the number of target pixels in the unit area is greater than or equal to the quantity threshold, it is determined that the rendering data of the unit area satisfies the grass texture characteristics, and grass inserts are inserted into the unit area. When it is determined that the number of target pixels in the unit area is less than the quantity threshold, it is determined that the rendering data of the unit area does not meet the grass texture characteristics, and there is no need to insert grass inserts into the unit area. By comparing the number of target pixels in the unit area with the quantity threshold, you can quickly determine whether the grass texture characteristics are met. This method is relatively simple and easy to implement. Compared with manual processing, the area to be rendered as grass can be automatically selected, so it is faster and more accurate.

In another possible implementation, the ratio between the number of target pixels in the unit area and the total number of pixels in the unit area is obtained, and the comparison value is compared with the first ratio threshold; when the ratio is greater than or equal to the first Ratio threshold, it is determined that the rendering data of the unit area meets the grass texture characteristics, and grass inserts are inserted into the unit area. When the ratio is less than the first ratio threshold, it is determined that the rendering data of the unit area does not meet the grass texture characteristics, and there is no need to insert grass inserts into the unit area. In an exemplary scenario, multiple terrain texture maps (such as 5 terrain texture maps) are used for rendering in the unit area. The multiple terrain texture maps include grass texture maps. The proportion of the grass texture map determines whether to Insert grass inserts into this unit area. For example, the proportion of the grass texture map is the ratio between the number of pixels (target pixels) occupied by the grass texture and the total number of pixels, that is, the number of target pixels in the unit area and the total number of pixels in the unit area. the ratio between. If the grass texture occupies most of the pixels, then the proportion of the grass texture will be relatively high. For example, the first ratio threshold is 20%. When the proportion of lawn texture is greater than 20%, it means that there is enough lawn texture in the unit area, and grass inserts are inserted into the unit area to increase the realism of the grass. In addition, by comparing the ratio between the number of target pixels and the total number of pixels in the unit area, the relative proportion of grass in the rendering data can be better grasped. In addition, at different zoom levels or viewing angles, the pixels in the unit area The total number of points may change, but the ratio between the number of target pixels and the total number of pixels in the unit area is relatively invariant, thus helping to adapt to rendering requirements at different scales. Compared with manual processing, the area to be rendered as grass can be automatically selected, so it is faster and more accurate.

In one possible implementation, based on the color data of each pixel in the unit area, the statistical value of the color data of the pixel in the unit area is obtained, the ratio between the statistical value of the color data and the grass color threshold is determined, and the The ratio between the statistical value of the color data and the grass color threshold is compared with the second ratio threshold; if the ratio between the statistical value of the color data and the grass color threshold is greater than or equal to the second ratio threshold, the rendering data of the unit area is determined To meet the grass texture characteristics, insert grass inserts into the unit area. If the ratio between the statistical value of the color data and the grass color threshold is less than the second ratio threshold, it is determined that the rendering data of the unit area does not satisfy the grass texture characteristics, and there is no need to insert grass inserts into the unit area. The ratio between the statistical value of color data and the grass color threshold can be understood as the proportion of lawn texture. Taking the second ratio threshold as 20% as an example, if the proportion of lawn texture is greater than or equal to 20%, grass inserts are inserted into the unit area.

The method of obtaining the statistical value of the color data of the pixels in the unit area is, for example, obtaining the average value of the color data of each pixel in the unit area. For example, add the color data of all pixels in the unit area, divide the sum of the color data by the number of pixels, and obtain the average color data; accordingly, if the average color data in the unit area is greater than or equal to the If the ratio threshold is 2, grass inserts will be inserted into the unit area. Since the color data of all pixels in the unit area is used, it is equivalent to considering the color characteristics of the entire unit area, making it more accurate. At the same time, by calculating the average value as a quantitative condition for judging whether the grass area should be selected or inserted, the impact of noise interference is reduced, making the results smoother and more stable.

Another way to obtain the statistical value of the color data of the pixels in the unit area is to obtain the color data of the center pixel in the unit area. Correspondingly, if the color data of the central pixel in the unit area is greater than or equal to the second ratio threshold, a grass insert is inserted into the unit area. Since the color data of the central pixel is used instead of the color data of all pixels in the unit area, the amount of data that needs to be processed is reduced and the calculation efficiency is improved. Moreover, it can better capture the color characteristics of the corners of the unit area, and is suitable for scenes with obvious grass edges.

Another way to obtain the statistical value of the color data of the pixels in the unit area is to obtain the average value of the color data of the pixels at each corner point in the unit area. For example, obtain the average value of the color data of the four corner points of the unit area: the upper left corner point, the lower left corner point, the upper right corner point, and the lower right corner point. Correspondingly, if the average value of the color data of the pixels at each corner point in the unit area is greater than or equal to the second ratio threshold, the grass insert is inserted into the unit area.

In another possible implementation, the rendering data includes texture data of pixels in the unit area. Whether to insert grass inserts into the unit area can be determined based on the texture data of the pixels in the unit area. The grass material usually has a certain density and may include small texture elements (such as grass blades, grass stems, etc.). It can detect whether there are texture elements in the texture data of the unit area that conform to the characteristics of grass (such as small and regular textures, such as elongated spots, mottled shapes, etc.). If there are texture elements in the texture data of the unit area that conform to the characteristics of grass, texture element, the unit area is judged to be a grass area, and grass inserts are inserted into the unit area.

In another possible implementation, the rendering data includes lighting data of pixels in the unit area. You can determine whether to insert grass inserts into the unit area based on the lighting data of the pixels in the unit area. Grass usually shows changes in light and dark when illuminated, with certain highlights and shadows. It can detect whether the lighting data in the unit area has lighting distribution and shadow effects that match the characteristics of grass, thereby determining whether to insert grass inserts into the unit area. For example, if the lighting data in a unit area has bright light reflection characteristics and will produce reflection changes under different lighting angles, then the unit area is determined to be a grass area and grass inserts are inserted into the unit area.

In another possible implementation, at least two of the unit area's color data, texture data, lighting data, material data and geometric data are combined to determine whether the unit area satisfies the grass texture characteristics. When the unit area satisfies the grass texture characteristics, the unit area is Insert grass inserts into the unit area. When the unit area does not meet the grass texture characteristics, there is no need to insert grass inserts into the unit area.

In one possible implementation, the number of grass inserts is determined based on the rendering data in the unit area; the number of grass inserts is obtained; and the number of grass inserts is inserted into the unit area. In this way, the number of grass inserts in the unit area is more closely matched with the rendering data of the unit area, so that the distribution of grass inserts is coordinated with the overall environment of the unit area. Moreover, making the number of grass inserts more appropriate reduces the probability of increased rendering burden and performance degradation due to too many inserted grass inserts, and reduces the probability of poor rendering results due to too few grass inserts.

In a possible implementation, the rendering data includes the proportion of grass texture in the unit area, and the number of grass inserts is determined based on the proportion of grass texture in the unit area. The number of grass inserts is positively related to the proportion of grass texture. That is to say, the greater the proportion of grass texture, the greater the number of grass inserts. Exemplarily, a second correspondence between the number of grass inserts and the proportion of the grass texture is preset. The input parameters of the second correspondence include the proportion of the grass texture in the unit area. The second correspondence is Output parameters include the number of grass inserts. Based on the proportion of grass texture in the unit area and the second corresponding relationship, the number of grass inserts is determined. The second corresponding relationship between the number of grass inserts and the proportion of grass texture can be a function, it can be a linear second corresponding relationship, or it can be an exponential function, a logarithmic function or a piecewise function. The nonlinear function can be used as the third Two corresponding relationships. Since the number of grass inserts is positively related to the proportion of grass texture, it is possible to simulate the situation where greener grass corresponds to more grass in reality, making the number of grass more suitable for the color of the grass.

In a possible implementation, the rendering data includes color data of pixels in the unit area, and the ratio between the color data of the pixels and the grass color threshold is obtained, based on the ratio between the color data of the pixels and the grass color threshold. , determine the number of grass inserts. The grass color threshold is used to determine the range of colors that belong to grass. The method of obtaining the ratio between the color data of the pixel and the grass color threshold is, for example, distance comparison. For example, calculating the distance between the color value of the pixel and the grass color threshold (such as Euclidean distance, degree of difference, etc.), and calculating the distance Convert to ratio. The method of obtaining the ratio between the color data of the pixel and the grass color threshold is also to calculate the similarity between the color value of the pixel and the grass color threshold, and convert the similarity into a ratio. Another way to obtain the ratio between the color data of the pixel and the grass color threshold is to compare the color value of the pixel with the grass color threshold and obtain a Boolean value. The Boolean value indicates whether the color value of the pixel is in the grass color. Within the color range indicated by the threshold.

In one possible implementation, the number of grass inserts is determined based on the ratio between the average color data of each pixel in the unit area and the grass color threshold. For example, a third corresponding relationship between the average color data of pixel points and the number of grass inserts is set, and the number of grass inserts is determined based on the average value of the color data of pixel points and the third corresponding relationship. For another example, when the ratio between the average color data of each pixel in the unit area and the grass color threshold is greater than or equal to the threshold, the number of grass inserts is determined to be the first number; when each pixel in the unit area When the ratio between the average value of the color data and the grass color threshold is less than the threshold, the number of grass inserts is determined to be the second number. The number of grass inserts can be positively related to the ratio between the average color data of each pixel and the grass color threshold. In this way, when the average value of the color data increases, the number of grass inserts will also increase accordingly, so that areas with greener simulated grass will have more grass.

In one possible implementation, the number of grass inserts is determined based on the ratio between the color data of the central pixel in the unit area and the grass color threshold. For example, a fourth correspondence between the color data of the center pixel and the number of grass inserts is set, and the number of grass inserts is determined based on the color data of the center pixel and the fourth correspondence. For another example, when the ratio between the color data of the center pixel in the unit area and the grass color threshold is greater than or equal to the threshold, the number of grass inserts is determined to be the first number; the color data of the center pixel in the unit area is the same as the grass color. When the ratio between the thresholds is less than the threshold, the number of grass inserts is determined to be the second number. The number of grass inserts can be positively related to the ratio between the average color data of each pixel and the grass color threshold. The number of grass inserts can be positively related to the ratio between the color data of the center pixel and the grass color threshold. In this way, when the color data of the center pixel increases, the number of grass inserts will also increase accordingly, thus simulating greener areas with more grass.

In one possible implementation, the number of grass inserts is determined based on the ratio between the average color data of the pixels at each corner point in the unit area and the grass color threshold. For example, a fifth correspondence relationship between the average color data of pixel points at each corner point and the number of grass inserts is set, and based on the average value of color data of pixel points at each corner point and the fifth correspondence relationship, determine Number of grass inserts. For another example, when the ratio between the average color data of the pixels at each corner point and the grass color threshold is greater than or equal to the threshold, the number of grass inserts is determined to be the first number; when the color of the pixels at each corner point is When the ratio between the average value of the data and the grass color threshold is less than the threshold, the number of grass inserts is determined to be the second number. The number of grass inserts may be positively related to the ratio between the average color data of the pixels at each corner point and the grass color threshold. In this way, when the color data of each corner point increases, the number of grass inserts will also increase accordingly, so that there will be more grass corresponding to greener simulated grass.

In the method provided by this embodiment, since the number of vertices in the grass inserts is negatively correlated with the rendering distance, the unit area further away from the rendering center can insert fewer grass inserts, and the unit area closer to the rendering center can be inserted. The greater the number of grass tiles, thereby reducing the risk of processing overhead caused by rendering too many vertices due to each inserted grass tile having more vertices, and also reducing the risk of each inserted grass tile having more vertices. Too few will lead to the risk of poor rendering effect due to too many vertices being rendered. Taking into account the rendering effect and rendering processing overhead, we should try our best to improve computer performance and resource utilization efficiency without sacrificing the rendering effect, and at the same time improve the quality of the grass. Density makes virtual scenes more realistic and detailed.

In addition, when dynamically rendering around virtual objects, rendering area selective rendering and grass patch precision rendering can be performed simultaneously. For example, there are a first virtual object and a second virtual object in the terrain grid area. While rendering through the first thread, the location of the first virtual object and the area within the preset radius range are used as the rendering area. The second thread determines the number of vertices corresponding to the rendering distance based on the rendering distance between the unit area in the rendering area where the second virtual object is located and the second virtual object, and inserts grass inserts with the number of vertices through the second thread.

In another possible implementation, the camera position is obtained as the rendering center. Based on the rendering distance between the unit area and the camera position in the rendering area, the grass insert is determined. The grass insert includes at least one vertex. The number of vertices in the grass insert is negatively related to the rendering distance; the grass insert is inserted into the unit area. Since the camera position is related to the user's perspective, by rendering with the camera position as the center, the number of vertices of the grass insert is negatively related to the rendering distance between the camera positions, thus allowing the accuracy of the grass insert to move away from or approach the unit area as the viewing angle changes. This change can achieve a gradual transition effect visually, making the detailed rendering of the scene more realistic. In addition, when the perspective leaves the unit area, grass inserts with a small number of vertices are used to reduce the processing overhead caused by rendering and reduce hardware requirements.

In another possible implementation, the light source position is obtained as the light source position. Based on the rendering distance between the unit area and the light source position in the rendering area, the grass insert is determined. The grass insert includes at least one vertex. The number of vertices in the grass insert is negatively related to the rendering distance; the grass insert is inserted into the unit area. In other words, the closer the rendering distance between the unit area and the light source position, the more vertices of the grass inserts inserted into the unit area, making the rendering effect more realistic, and the farther the rendering distance between the unit area and the light source position. , the fewer the vertices of the grass inserts inserted into the unit area, thereby reducing the processing overhead caused by rendering and reducing hardware requirements. In addition, the area closer to the light source has higher-detailed grass inserts, which allows the area around the light source to present the distribution of grass more realistically and naturally, improving the visual effect.

In another possible implementation, the user interaction position is obtained as the user interaction position. Based on the rendering distance between the unit area and the user interaction position in the rendering area, determine the grass insert. The grass insert includes at least one vertex. The number of vertices in the grass insert is negatively related to the rendering distance; insert the grass insert into the unit area. . In other words, the closer the rendering distance between the unit area and the user interaction position, the greater the number of vertices of the grass inserts inserted into the unit area, making the rendering effect more realistic. The further away, the fewer vertices of the grass inserts inserted into the unit area, thereby reducing the processing overhead caused by rendering and reducing hardware requirements. In addition, when the user moves or operates, the number of vertices of the grass insert will change accordingly, allowing the user to feel that the changes in the scene are based on their own position and actions, making it more dynamic. In addition, users can determine the center of the rendering through their own interactive choices, which facilitates customized rendering based on the user's actual needs.

In one possible implementation, the resolution of the texture map is determined based on the distance between the unit area in the rendering area and the rendering center. The resolution of the texture map is negatively related to the distance; the grass insert with the resolution of the texture map is determined. .

The resolution of the texture map refers to the number of pixels included in the texture map. The higher the resolution of the texture map, the denser the pixels in the texture image are, and the clearer the details of the grass insert. Since the resolution of the texture map is dynamically determined based on the distance from the unit area to the rendering center, unit areas closer to the rendering center require higher-resolution texture maps, while unit areas farther away can use lower-resolution texture maps. Resolution texture map. For unit areas far away from the rendering center, using low-resolution texture maps can reduce memory usage and rendering overhead, and improve rendering performance. For the unit area close to the rendering center, high-resolution texture maps are used to make the grass inserts have higher-precision details, creating a more realistic visual effect.

In one possible implementation, the boundaries between multiple rendering areas in a terrain mesh area are smoothed. Smoothing refers to processing the boundaries between rendering areas to reduce discontinuities, jagged or obvious transitions, making the rendering boundaries more natural and smooth. The smoothing processing method includes, but is not limited to, at least one of seam fusion, texture transition, normal averaging, vertex scaling, or edge blurring.

Fusion seams, for example, achieve smooth transitions by fusing the textures, colors, or other attributes of adjacent rendering areas. This can be achieved by drawing a seam area at the boundary and performing texture interpolation, color mixing, and other operations within the seam area. Seam areas can use gradients and transition effects to gradually blend the features of adjacent rendered areas. Texture transitions, for example, use multiple textures and transition them through blending techniques to smooth the boundaries between rendered areas. Texture transition can be achieved using techniques such as texture fusion and weight blending. By adjusting the transparency of the texture or using Alpha maps, the transition effect between different textures can be controlled. Normal averaging makes for example a smooth transition of normal vectors between adjacent rendering areas. By calculating the normal directions of adjacent faces and averaging or interpolating them, you can reduce the normal differences and make the boundaries smoother. Using smooth normals can produce a more realistic rendering. Vertex scaling, for example, adjusts the vertex positions on the boundaries of adjacent rendering areas to make the gradual transition between adjacent areas smooth. Vertex scaling can be achieved through methods such as interpolation or weighting to smooth the changes in height and shape of adjacent areas. transition. Edge Blur applies a blur effect around the render boundary to reduce jagged edges and hard edge artifacts. Edge blur can use algorithms such as Gaussian blur to process boundary pixels and smoothly blend the color of edge pixels with surrounding pixels.

The following is an example of the process of constructing a terrain grid area.

A terrain grid area is a discretized area used to represent terrain, typically used for terrain rendering and simulation. In computer graphics, a terrain grid area can be viewed as a two- or three-dimensional grid, consisting of a series of adjacent vertices and the edges connecting them. In the two-dimensional case, the terrain grid area is a grid plane consisting of a series of vertices and edges. Each vertex represents a point on the terrain surface, and edges represent the connections between adjacent points. Each vertex can be assigned a height value to simulate elevation changes in the terrain. Interpolation algorithms can be used to infer the height of unknown points from known height values to form a smooth terrain model. In 3D, a terrain grid area is a grid of connected triangles (or other polygons), similar to the surface of a grid. Each vertex represents a point on the terrain surface, and each triangle represents a small segment of the terrain. Each vertex can be assigned a height value to simulate the height changes of the terrain. By interpolating and smoothing the height value on each triangle, a continuous terrain surface model can be obtained. The fineness of the terrain mesh area depends on the resolution of the mesh, that is, the number of vertices. Higher resolutions provide more detailed and realistic representations of terrain, but also increase computational and rendering complexity. Lower resolution improves performance but results in less detailed terrain surfaces.

In a possible implementation, in the selected grid, the height value of each pixel in the grid and the position information of each pixel are determined through a preset sequence array. Construct a terrain grid area based on the height value of the pixel and the position information of the pixel.

In one possible implementation, terrain grid data behaves like a grayscale image. For example, use the color brightness (grayscale) in a height terrain map to represent the height changes of the terrain. Specifically, when a certain area in the height terrain map is whiter, it means that the height value of the area is larger, that is, the terrain of the area is higher. On the contrary, when the color of a certain area in the height terrain map is darker or darker, it means that the height value of the area is smaller, that is, the terrain is lower. For example, please refer to Figure 2, which is a schematic diagram of terrain grid data provided by an embodiment of the present application. By observing the lightness and darkness of the colors in Figure 2, you can intuitively understand the height changes of the terrain.

A sequence array refers to an array with sequences as data. In other words, each element in the sequence array is sequence type data. The number of bits per element (i.e. sequence) in the sequence array can be set according to precision requirements. For example, the number of bits in the sequence can be 8 bits or 16 bits, etc. A larger number of bits in the sequence provides a finer representation of the height value. The numerical value of the sequence corresponds to the height value. The sequence is in binary format.

The storage form of the array means that the distribution of the sequence is ordered. The number of sequence data in each row and column of the array corresponds to the number of pixels in the terrain grid respectively. For example, the number of sequence data per row of the array indicates the number of pixels per row in the terrain grid. The number of sequence data per column of the array indicates the number of pixels per column in the terrain grid. For example, if there are 1080 sequences in each row of the array and 960 sequences in each column of the array, it means that the data of the terrain grid contains 1080*960 pixels, and the terrain grid has 1080 pixels in each row and 960 in each column. pixel. The horizontal distance between each pixel is the same, so using the sequence as the height value of the pixel can render a height terrain map.

The following is an example of the process of building a rendering area.

In a possible implementation, the terrain grid area is rendered based on the vertex data and texture feature configuration in the terrain grid data to obtain the rendering area.

In a possible implementation, the vertex data in the terrain grid data is obtained based on the coordinate information of the pixel points in the terrain grid data and the height value of the pixel points. Each pixel in the sampled image is regarded as a vertex in the terrain grid area. Vertex data includes coordinate information and height values, which are subsequently used for texture rendering of the vertex.

The server obtains all vertex data of the terrain grid area, and then performs texture rendering on all vertices of the terrain grid area according to the texture feature configuration that needs to be rendered.

Normally, the entire terrain grid area needs to be rendered with texture. However, some terrains are large and limited by hardware issues, so the entire terrain grid area cannot be rendered at the same time, or we do not want to occupy too much space. Hardware, terrain grid areas will not be rendered all at once. Therefore, the complete terrain grid area is divided into multiple rendering areas, and then the multiple rendering areas are rendered successively according to the preset rules, thereby realizing the rendering of the entire terrain grid area. Alternatively, the entire terrain grid area may not be rendered at the same time, but a specific rendering area may be rendered as needed. For example, the rendering area involved in the specified virtual character's position within a preset radius may be used as a specific rendering area. rendering, thereby reducing the hardware requirements required for rendering.

Texture feature configuration is through terrain texture map as terrain texture data. Specifically, the terrain texture map is analyzed to obtain the color distribution data of all pixels in the terrain texture map. The color data is RGB data, and then the color distribution data is used as terrain texture data (including the number of pixels and the corresponding pixels). color).

In one possible implementation, the terrain grid area to be rendered is completely rendered by densely paving the terrain texture data in the terrain grid area.

Dense tiling refers to tiling and filling terrain texture data (or terrain texture map) in the terrain grid area, so that the entire surface of the terrain grid area is completely covered by the terrain texture map.

In one possible implementation, the accuracy of dense tiling is adjusted by configuring tiling parameters. For example, the pixel size of the terrain texture map is 20*20, and it needs to be tiled in a rendering area of 40*40 size. Depending on the tiling degree, a 1:1 tiling can be selected in the 40*40 rendering area. At this time, each pixel in the 40*40 rendering area is covered and rendered one by one. At this time, the number of tiled terrain texture maps is 4; when the tiling ratio of 1:4 is selected, then 40 Only a quarter of the pixels in the *40 rendering area are covered, that is, one pixel out of every four pixels is rendered.

Optionally, the method shown in Figure 1 is performed by a computing device. Alternatively, the method shown in FIG. 1 is collaboratively executed by a computing device cluster including multiple computing devices. For example, computing device A executes S110 in the method shown in FIG. 1 , and computing device B executes S120 in the method shown in FIG. 1 . The computing device is, for example, a terminal or a server. In a possible implementation, the method shown in Figure 1 is executed by a computing device by running an application program. The application program is, for example, browser software or client software. This embodiment does not limit the execution subject of the method shown in Figure 1 .

Figure 3 is a schematic structural diagram of a grass rendering device provided by an embodiment of the present application. The device 200 shown in Figure 3 includes:

Obtaining module 210 is used to obtain the rendering center in the rendering area;

The determination module 220 is configured to determine the grass insert based on the rendering distance between the unit area in the rendering area and the rendering center. The grass insert includes at least one vertex, and the number of vertices in the grass insert is negatively related to the rendering distance;

The rendering module 230 is used to insert grass inserts into the unit area.

In a possible implementation, the grass insert includes a first grass insert and a second grass insert. The number of vertices in the first grass insert is greater than the number of vertices in the second grass insert. The determination module 220 uses In response to determining that the rendering distance is less than or equal to the distance threshold, a first grass patch is determined; or in response to determining that the rendering distance is greater than or equal to the distance threshold, a second grass patch is determined.

In a possible implementation, the determining module 220 is configured to determine the grass inserts based on the rendering distance and the first correspondence. The first correspondence indicates the correspondence between the rendering distance and the first quantity. In the grass inserts The number of vertices is the first number.

In a possible implementation, the determination module 220 is used to determine the number of grass inserts based on the rendering data in the unit area; the rendering module 230 is used to insert the number of grass inserts into the unit area.

In a possible implementation, the rendering data includes the proportion of grass texture in the unit area, and the determination module 220 is configured to determine the number of grass inserts based on the proportion of grass texture in the unit area. The number of grass inserts is equal to The proportion of grass texture is positively related.

In a possible implementation, the rendering data includes color data of pixels in the unit area, and the determination module 220 is configured to determine the number of grass inserts based on the ratio between the color data of the pixels and the grass color threshold.

In a possible implementation, the determination module 220 is configured to determine the number of grass inserts based on the ratio between the average color data of each pixel in the unit area and the grass color threshold; or, based on the unit area The number of grass inserts is determined by the ratio between the color data of the central pixel and the grass color threshold; or, based on the ratio between the average color data of the pixels at each corner point in the unit area and the grass color threshold, Determine the number of grass inserts.

In a possible implementation, the determining module 220 is configured to determine that the rendering data of the unit area satisfies the grass texture characteristics.

In a possible implementation, the determination module 220 is also used to determine the rendering area based on the location of the virtual object and the preset radius. The difference between the boundary of the rendering area and the location of the virtual object is the preset radius.

In a possible implementation, the obtaining module 210 is used to obtain the position of the virtual object as the rendering center.

Figure 4 is a schematic structural diagram of a server provided by an embodiment of the present application. The server 300 includes: a processor 301. The processor 301 is coupled to a memory 302. The memory 302 stores at least one computer program instruction. The at least one computer program instruction is processed by The server 301 is loaded and executed, so that the server 300 implements the method provided by the embodiment of FIG. 1 .

Each embodiment in this specification is described in a progressive manner. The same and similar parts between the various embodiments can be referred to each other. Each embodiment focuses on its differences from other embodiments.

A refers to B, which means that A is the same as B or that A is a simple transformation of B.

The terms "first" and "second" in the description and claims of the embodiments of this application are used to distinguish different objects, rather than to describe a specific order of objects, and cannot be understood to indicate or imply relative importance. sex. For example, the first grass insert and the second grass insert are used to distinguish different grass inserts, rather than describing a specific order of grass inserts, nor should it be understood that the first grass insert is more advanced than the second grass insert. important.

The information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in the embodiments of this application are all processed. Authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions.

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), etc.

The above embodiments are only used to illustrate the technical solutions of the present application, but are not intended 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 that they can still modify the technical solutions described in the foregoing embodiments. Modifications may be made to the recorded technical solutions, or equivalent substitutions may be made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application.

Claims (15)

1. A method of grass rendering, the method comprising:

acquiring a rendering center in a rendering area;

determining a grass insert based on a rendering distance between a unit area in the rendering area and the rendering center, the grass insert comprising at least one vertex, the number of vertices in the grass insert being inversely related to the rendering distance;

the grass blades are inserted into the unit areas.

2. The method of claim 1, wherein the grass blades include a first grass blade and a second grass blade, the number of vertices in the first grass blade being greater than the number of vertices in the second grass blade, the determining a grass blade based on a rendering distance between a unit area in the rendering area and the rendering center comprising:

In response to determining that the rendering distance is less than or equal to a distance threshold, determining the first grass insert; or,

in response to determining that the rendering distance is greater than or equal to a distance threshold, the second grass insert sheet is determined.

3. The method of claim 1, wherein the determining a grass insert based on a rendering distance between a unit area of the rendering area and the rendering center comprises:

and determining a grass insert based on the rendering distance and a first corresponding relation, wherein the first corresponding relation indicates a corresponding relation between the rendering distance and a first quantity, and the quantity of vertexes in the grass insert is the first quantity.

4. The method of claim 1, wherein said inserting the grass blades into the unit area comprises:

determining the number of grass blades based on the rendering data within the unit area;

inserting said number of said grass blades into said unit area.

5. The method of claim 4, wherein the rendering data includes a duty cycle of a grass texture within the unit area, and wherein determining the number of grass blades based on the rendering data of the unit area includes:

And determining the number of the grass blades based on the duty ratio of the grass texture in the unit area, wherein the number of the grass blades is positively correlated with the duty ratio of the grass texture.

6. The method of claim 4, wherein the rendering data includes color data for pixels within the unit area, and wherein the determining the number of grass blades based on the rendering data within the unit area includes:

and determining the number of the grass blades based on the ratio between the color data of the pixel points and the grass color threshold.

7. The method of claim 4, wherein the determining the number of grass blades based on a ratio between the color data of the pixel points and a grass color threshold comprises:

determining the number of the grass blades based on the ratio between the average value of the color data of each pixel point in the unit area and the grass color threshold value; or,

determining the number of the grass blades based on the ratio between the color data of the central pixel point in the unit area and the grass color threshold; or,

and determining the number of the grass inserting sheets based on the ratio between the average value of the color data of the pixel points of each angular point in the unit area and the grassland color threshold value.

8. The method of claim 1, wherein the determining a grass blade is preceded by determining a grass blade based on a rendering distance between a unit area of the rendering area and the rendering center, the method further comprising:

determining that the rendered data for the unit area satisfies a grass texture feature.

9. The method of claim 1, wherein prior to the acquiring the rendering center in the rendering region, the method further comprises:

and determining a rendering area based on the position of the virtual object and a preset radius, wherein the difference between the boundary of the rendering area and the position of the virtual object is the preset radius.

10. The method of claim 1, wherein the obtaining a rendering center in a rendering region comprises:

and acquiring the position of the virtual object as a rendering center.

11. The method of claim 1, wherein the obtaining a rendering center in a rendering region comprises:

acquiring a camera position as a rendering center; or,

acquiring a light source position as a rendering center; or,

and acquiring the user interaction position as a rendering center.

12. The method of claim 1, wherein the determining a grass insert based on a distance between a unit area in the rendering area and the rendering center comprises:

Determining a resolution of a texture map based on a distance between a unit area in the rendering area and the rendering center, the resolution of the texture map being inversely related to the distance;

a grass insert having a resolution of the texture map is determined.

13. A lawn rendering device, comprising:

the acquisition module is used for acquiring a rendering center in the rendering area;

a determining module for determining a grass blade based on a rendering distance between a unit area in the rendering area and the rendering center, the grass blade comprising at least one vertex, the number of vertices in the grass blade being inversely related to the rendering distance;

an insertion module for inserting the grass blades into the unit area.

14. A server, the server comprising: a processor coupled to a memory having stored therein at least one computer program instruction that is loaded and executed by the processor to cause the server to implement the method of any of claims 1-12.

15. A computer readable storage medium, characterized in that at least one instruction is stored in the storage medium, which instructions, when run on a computer, cause the computer to perform the method according to any of claims 1-12.