CN114782606A - Voxel model texture map unfolding method and device, electronic device and medium - Google Patents

Abstract

The application provides a texture map expanding method and device of a voxel model, electronic equipment and a medium, wherein the method comprises the following steps: acquiring a target four-side surface contained in the outer surface of a voxel model to be processed, determining texture mapping coordinates of texture mapping surface blocks corresponding to the target four-side surface in an expanded texture mapping according to three-dimensional coordinates of the target four-side surface in the voxel model, splicing the texture mapping surface blocks corresponding to the target four-side surface in the same direction into texture mapping images respectively corresponding to the outer surface of the voxel model by combining the directions of the target four-side surface in the voxel model, and distributing the texture mapping images into a pixel grid map in a manner that each texture mapping surface block corresponds to one pixel in the pixel grid map to obtain the expanded texture mapping of the voxel model; the method and the device can realize automatic generation of the unfolded texture mapping of the voxel model, ensure the consistency of texture mapping surface blocks in the texture mapping image and further ensure the accuracy of the generated unfolded texture mapping.

Description

Texture map expansion method and device for voxel model, electronic device, medium

technical field

The present application relates to the field of computer technology, and in particular, to a texture map expansion method and device for a voxel model, an electronic device, and a medium.

Background technique

The production of 3D objects (such as 3D game characters) can be divided into model production and rendering processes. Among them, the model production process is further divided into: constructing 3D models of 3D objects, texture map expansion (also called split texture maps), and map production processes .

The three-dimensional model of the constructed three-dimensional object can be a voxel model, and the voxel model is a three-dimensional model composed of multiple cubes. The texture map of the voxel model is expanded, and the size of the texture map grid in the expanded texture map is required to be obtained. It is equal to the size of one pixel of the pixel grid image, wherein the texture map surface block corresponding to each four-sided surface of the cube constituting the voxel model is a texture map grid.

In the related art, the texture map expansion of the voxel model includes the following steps: Step 1, manually select the edge of the voxel model, and segment it to obtain the texture map image of each face of the voxel model; Step 2, manually The texture map images are placed horizontally, horizontally and vertically, and the number of texture map grids contained in each texture map image is determined; Step 3: Manually evaluate the size of the texture map required by the voxel model, and determine the background size of the texture map based on the evaluation results. Manually place each texture map image into the determined pixel grid map, and make each texture map grid correspond to a pixel in the pixel grid map, so as to obtain the expanded texture map of the voxel model.

It can be seen that the related art has cumbersome steps to expand the texture map of the voxel model, takes a long time to make, and requires manual evaluation of the size of the pixel grid used, which is prone to errors and causes problems such as rework.

It should be noted that the information disclosed in the above Background section is only for enhancement of understanding of the background of the present disclosure, and therefore may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.

SUMMARY OF THE INVENTION

In view of the above problems, the present application is proposed to provide a texture map expansion method and apparatus, electronic device, and medium for a voxel model that overcome the above problems or at least partially solve the above problems, including:

A texture map expansion method for a voxel model, the method comprising:

Obtain the target quadrilateral surface contained in the outer surface of the voxel model to be processed;

According to the three-dimensional coordinates of the target quadrilateral surface in the voxel model, determine the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map;

Based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target quadrilateral surface on the voxel model, the texture map surface blocks corresponding to the target four-sided surface with the same orientation are spliced into the Texture map images corresponding to the outer surface of the voxel model;

Arranging the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model, wherein each texture map surface block in the texture map image corresponds to the pixel grid map of one pixel.

Optionally, the voxel model is composed of a plurality of cubes, and each cube has six quadrilateral surfaces, and the acquiring the target quadrilateral surface contained in the outer surface of the voxel model to be processed includes:

Determining the four-sided faces that do not coincide with the four-sided faces of other cubes among the four-sided faces of the cube as the target four-sided faces composing the outer surface of the voxel model;

or,

The four-sided surfaces that overlap among the plurality of cubes are culled to obtain the target four-sided surfaces composing the outer surface of the voxel model.

Optionally, according to the three-dimensional coordinates of the target quadrilateral surface in the voxel model, determining the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map, including:

obtaining the three-dimensional coordinates of the geometric vertices of the target quadrilateral;

According to the three-dimensional coordinates of the geometric vertices, the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map are determined.

Optionally, the determining, according to the three-dimensional coordinates of the geometric vertices, the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map, including:

The three-dimensional coordinates of the geometric vertices are converted into floating point coordinates, and the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map are determined based on the floating point coordinates.

Optionally, based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target quadrilateral on the voxel model, map the texture map corresponding to the target quadrilateral with the same orientation. The surface blocks are spliced into texture map images corresponding to the outer surfaces of the voxel model, including:

According to the texture map coordinates of the texture map surface block in the expanded texture map, sort the texture map surface blocks to obtain the serial number of the texture map surface block;

According to the orientation of the target quadrilateral face on the voxel model, the texture map surface blocks corresponding to the target quadrilateral face with the same orientation are divided into the same set;

For the texture map surface blocks in each set, the texture map surface blocks in the same set are spliced according to the serial numbers of the texture map surface blocks to obtain a texture map image.

Optionally, the method further includes:

A pixel grid map is determined according to the number of texture map surface blocks of the voxel model, and the pixel number of the pixel grid map is not less than the number of texture map surface blocks.

Optionally, arranging the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model; including:

Get the first pixel grid image;

When the number of pixels of the first pixel grid image is less than the number of texture map surface blocks, acquire a second pixel grid image from the pixel grid library, and arrange the texture map image to the first pixel grid image. In a two-pixel grid map, to obtain an expanded texture map of the voxel model; the number of pixels in the second pixel grid map is not less than the number of texture map surface blocks;

When the number of pixels of the first pixel grid map is not less than the number of the texture map surface blocks, the texture map image is arranged in the first pixel grid map.

Optionally, arranging the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model; including:

Arranging the texture map images into a pixel grid map at specified intervals to obtain an expanded texture map of the voxel model.

A texture map expansion device for a voxel model, the device includes:

The target quadrilateral surface acquisition module is used to acquire the target quadrilateral surface contained in the outer surface of the voxel model to be processed;

a texture map surface block generation module, configured to determine the texture map coordinates of the texture map surface block corresponding to the target four-sided surface in the expanded texture map according to the three-dimensional coordinates of the target four-sided surface in the voxel model;

The texture map image generation module is used for, based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target quadrilateral on the voxel model, the target quadrilateral corresponding to the same orientation The texture map surface blocks are spliced into texture map images corresponding to the outer surfaces of the voxel model respectively;

An expanded texture map generation module, configured to arrange the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model, wherein each texture map surface block in the texture map image Corresponds to a pixel in the pixel grid.

Optionally, the voxel model is composed of a plurality of cubes, and each cube has six four-sided surfaces, and the target four-sided surface acquisition module is used to obtain the four-sided surfaces of the four-sided surfaces of the cube that do not overlap with the four-sided surfaces of other cubes. The surface is determined as the target quadrilateral surface composing the outer surface of the voxel model; or, used for culling the coincident quadrilateral surfaces among multiple cubes to obtain the target quadrilateral surface composing the outer surface of the voxel model.

Optionally, the texture map surface block generation module includes:

The first acquisition module is used to acquire the three-dimensional coordinates of the geometric vertices of the four-sided surface of the target;

The texture map coordinate determination module is configured to determine the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map according to the three-dimensional coordinates of the geometric vertices.

Optionally, the texture map coordinate determination module is configured to convert the three-dimensional coordinates of the geometric vertices into floating-point coordinates, and determine, based on the floating-point coordinates, that the texture map surface block corresponding to the target quadrilateral surface is being expanded. Texture map coordinates in the texture map.

Optionally, the texture map image generation module includes:

a sorting module, configured to sort the texture map surface blocks according to the texture map coordinates of the texture map surface blocks in the expanded texture map to obtain the serial number of the texture map surface blocks;

A classification module, configured to divide the texture map face blocks corresponding to the target quadrilateral faces with the same orientation into the same set according to the orientation of the target quadrilateral face on the voxel model;

The splicing module is used for splicing the texture map surface blocks in the same set according to the serial numbers of the texture map surface blocks to obtain a texture map image.

Optionally, the device further includes:

A grid map determination module, configured to determine a pixel grid map according to the number of texture map surface blocks of the voxel model, where the number of pixels of the pixel grid map is not less than the number of texture map surface blocks.

Optionally, the expanded texture map generation module includes:

a grid image acquisition module, used to acquire the first pixel grid image;

The first generation module is configured to obtain a second pixel grid image from the pixel grid library when the number of pixels of the first pixel grid image is less than the number of the texture map surface blocks, and use the texture map to obtain a second pixel grid image. The images are arranged in the second pixel grid map to obtain the expanded texture map of the voxel model; the number of pixels in the second pixel grid map is not less than the number of texture map surface blocks;

A second generating module, configured to arrange the texture map image into the first pixel grid map when the number of pixels of the first pixel grid map is not less than the number of the texture map surface blocks.

Optionally, the expanded texture map generation module is configured to arrange the texture map images into a pixel grid map according to a specified interval, so as to obtain the expanded texture map of the voxel model.

An electronic device comprising a processor, a memory, and a computer program stored on the memory and capable of running on the processor, the computer program implementing the above-described voxel model when executed by the processor The steps of the texture map unwrapping method.

A computer-readable storage medium stores a computer program on the computer-readable storage medium, and when the computer program is executed by a processor, implements the steps of the above-described texture map expansion method for a voxel model.

This application has the following advantages:

In this embodiment of the present application, by acquiring the target quadrilateral included in the outer surface of the voxel model to be processed, and according to the three-dimensional coordinates of the target quadrilateral in the voxel model, it is determined that the texture map surface block corresponding to the target quadrilateral is being expanded. The texture map coordinates in the texture map, combined with the orientation of the target four-sided surface on the voxel model, spliced the texture map surface blocks corresponding to the target four-sided surface with the same orientation into the texture map images corresponding to the outer surface of the voxel model, and finally The texture map image is arranged in the pixel grid map in the way that each texture map surface block corresponds to one pixel in the pixel grid map, and the expanded texture map of the voxel model is obtained; the expanded texture map of the voxel model can be automatically generated. At the same time, in the process of generating the expanded texture map of the voxel model in the embodiment of the present application, the texture map surface block corresponding to the target four-sided surface used to form the outer surface of the voxel model is first obtained, and then the texture map image is obtained by splicing, Therefore, the consistency of the texture map patches in the texture map image can also be ensured, and the inconsistency of the texture map patches obtained by manual segmentation in the prior art is solved, and the expanded texture map is obtained by manually placing the texture map patches. This leads to the problem of inaccuracy and low efficiency of the unfolded texture map. The embodiments of the present application improve the efficiency and accuracy of generating the unfolded texture map.

Description of drawings

In order to illustrate the technical solutions of the present application more clearly, the following briefly introduces the drawings used in the description of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, which are of great significance to the art. For those of ordinary skill, other drawings can also be obtained from these drawings without creative labor.

FIG. 1 is a flowchart of steps of a texture map expansion method for a voxel model according to an embodiment of the present application;

2 is a schematic diagram of a voxel model to be processed in an embodiment of the present application;

Fig. 3 is the schematic diagram of the texture map surface block obtained after the target quadrilateral surface of the voxel model shown in Fig. 2 is expanded by texture map;

Fig. 4 is a schematic diagram of splicing texture map surface blocks to obtain a texture map image;

Fig. 5 is the expanded texture map schematic diagram of the voxel model shown in Fig. 2;

FIG. 6 is a structural block diagram of an apparatus for expanding a texture map of a voxel model according to an embodiment of the present application.

Detailed ways

In order to make the above objects, features and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are some, but not all, embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

A voxel model is a model that uses an ordered combination of a large number of regular voxels (such as cubes) to represent three-dimensional objects. In the process of making a voxel model, it involves the process of texture map expansion. Texture map is UV texture map. UV is the abbreviation of UV texture map coordinates. It is similar to the X, Y, and Z axes of the space model. The position information of each point, and these points are related to the voxel model to determine the position of the surface texture map, and UV accurately corresponds each point on the texture map to the surface of the voxel model. In the related art, in the process of expanding the texture map of the voxel model, it is necessary to manually select the edge of the segmentation to obtain the texture map image of each face of the voxel model, and then determine the texture contained in each texture map image through manual operation. Texture patch (also called texture map grid), and evaluate the texture size required by the voxel model to determine the texture's pixel grid size, where the pixel grid is composed of black and white grids representing the size of one pixel The checkerboard basemap generated by interleaving also becomes the texture background; finally, each texture map image is manually placed into the determined pixel grid map. During the placement process, ensure that each texture map surface in the texture map image is placed. A block corresponds to a pixel in the pixel grid to get the unwrapped texture map of the voxel model. The whole process is cumbersome, takes a long time to make, and requires manual evaluation of the size of the texture used, which is prone to errors and rework.

In view of this, an embodiment of the present application provides a texture map expansion method for a voxel model. , and then according to the orientation of the outer surface of the voxel model composed of the target four sides and the texture map coordinates of the texture map surface block in the expanded texture map, the texture map surface blocks are spliced to obtain the texture map image corresponding to each outer surface of the voxel model. , and finally arrange the texture map image into the pixel grid map according to the requirements of one pixel of the pixel grid map corresponding to a texture map surface block, and obtain the expanded texture map of the voxel model; realize the automatic texture map expansion of the voxel model , which improves the efficiency and accuracy of texture map expansion for voxel models.

The texture map expansion method of the voxel model provided by the embodiment of the present application can be applied to electronic devices, and when the texture map of the voxel model needs to be split, the expanded texture map of the voxel model can be automatically obtained. The electronic device may be hardware or software. When the electronic device is hardware, it can be implemented as a cluster composed of multiple servers or terminal devices, or can be implemented as a single server or a single terminal device. When the electronic device is software, it can be installed in the above-listed hardware devices.

Referring to FIG. 1 , a flowchart of steps of a texture map expansion method for a voxel model provided by an embodiment of the present application is shown. In the embodiment of the present application, the method may include the following steps:

Step 101, acquiring the target quadrilateral surface contained in the outer surface of the voxel model to be processed;

Step 102, according to the three-dimensional coordinates of the target quadrilateral surface in the voxel model, determine the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map;

Step 103, based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target four-sided surface on the voxel model, splicing the texture map surface blocks corresponding to the target four-sided surface with the same orientation into texture map images corresponding to the outer surfaces of the voxel model respectively;

Step 104: Arrange the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model, wherein each texture map surface block in the texture map image corresponds to the pixel grid A pixel in the grid.

In this embodiment of the present application, the target quadrilateral surface included in the outer surface of the voxel model to be processed is obtained, and the texture map surface block corresponding to the target quadrilateral surface is determined in the expanded texture map according to the three-dimensional coordinates of the target quadrilateral surface in the voxel model. The texture map coordinates of the target four-sided surface on the voxel model are combined with the orientation of the target four-sided surface on the voxel model, the texture map surface blocks corresponding to the target four-sided surface with the same orientation are spliced into the texture map image corresponding to the outer surface of the voxel model, and finally the texture map image According to the way that each texture map surface block corresponds to one pixel in the pixel grid map, it is arranged in the pixel grid map to obtain the expanded texture map of the voxel model; the expanded texture map of the voxel model can be automatically generated. In the process of generating the unfolded texture map of the voxel model in the embodiment of the present application, the texture map surface blocks corresponding to the target four-sided surface used to form the outer surface of the voxel model are obtained first, and then the texture map image is obtained by splicing. It can ensure the consistency of the texture map surface blocks in the texture map image, and solves the problem that the texture map surface blocks obtained by manual manual segmentation in the prior art are inconsistent, and the texture map surface blocks are manually placed to obtain the expanded texture map, resulting in expanded textures. For the problem of inaccurate mapping and low efficiency, the embodiments of the present application improve the efficiency and accuracy of generating an unfolded texture map.

Next, the texture map expansion method of the voxel model in this exemplary embodiment will be further described.

In step 101, the target quadrilateral surface contained in the outer surface of the voxel model to be processed is acquired.

In this embodiment, the voxel model to be processed refers to a voxel model that needs to split texture maps. The voxel model to be processed may be one or multiple. When there are multiple voxel models to be processed For each voxel model, the same processing process as the subsequent steps is performed respectively to obtain the unfolded texture map corresponding to each voxel model. It should be noted that, multiple voxel models may be processed simultaneously in a parallel manner, or may be processed sequentially in a serial manner, which is not limited in this embodiment of the present application.

The voxel model is composed of cubes, each cube has six quadrilateral faces, and the outer surface of the voxel model includes a plurality of planes, so each plane of the voxel model contains at least one quadrilateral face. FIG. 2 shows a voxel model to be processed in an embodiment of the present application. The outer surface of the voxel model includes a plurality of planes, and each plane is composed of at least one four-sided plane. In order to facilitate understanding, one of the planes in the voxel model shown in FIG. 2 is identified, and one four-sided plane in the identified plane is identified. The quadrilaterals of the surface are defined as the target quadrilaterals to distinguish them from the quadrilaterals inside the voxel model in the cube.

Exemplarily, when the relevant application program is executed on the electronic device processor, a graphical user interface can be rendered on the display screen of the electronic device, and one or more voxel models can be displayed in the graphical user interface; The selection operation of the displayed voxel model determines the voxel model selected by the selection operation as the voxel model to be processed. If multiple cubes in the voxel model to be processed have been merged when forming the voxel model, that is, the overlapping four-sided surfaces between the multiple cubes forming the voxel model have been eliminated, and only the outer surface of the voxel model is retained. Four-sided surface, the target four-sided surface of the voxel model to be processed can be directly obtained.

If the multiple cubes in the voxel model to be processed are not combined when forming the voxel model, that is, the six faces of each cube forming the voxel model are reserved, then in an optional embodiment of the present application, the above acquisition The process of the voxel model to be processed, including:

Among the four-sided faces of the cube, the four-sided faces that do not overlap with the four-sided faces of other cubes are determined as the target four-sided faces composing the outer surface of the voxel model.

In this embodiment, to obtain the voxel model to be processed, all cubes constituting the voxel model can be obtained, and for each four-sided surface of each cube, it can be determined whether the four-sided surface overlaps with the four-sided surface of other cubes. Then it means that the quadrilateral surface is located inside the voxel model. If they do not overlap, it means that the quadrilateral surface is located outside the voxel model. When the judgment result is that they do not overlap, it is determined that the quadrilateral surface is one of the outer surfaces of the voxel model. A target quadrilateral, and get the target quadrilateral. In the above manner, the four-sided surfaces of the four-sided surfaces of each cube that do not overlap with the four-sided surfaces of other cubes can be determined as the target four-sided surfaces constituting the outer surface of the voxel model.

In an optional embodiment of the present application, the voxel model is composed of multiple cubes, and each cube has six four-sided faces. The above-mentioned process of acquiring the voxel model to be processed includes:

The four-sided surfaces that overlap among the plurality of cubes are culled to obtain the target four-sided surfaces composing the outer surface of the voxel model.

In this embodiment, all cubes constituting the voxel model can be obtained, and each cube has six four-sided faces. According to the position of the cube in the voxel model, the position information of each four-sided face of each The four-sided surfaces with the same position information are determined as the overlapping four-sided surfaces; the overlapping four-sided surfaces are eliminated, and the remaining four-sided surfaces obtained are the target four-sided surfaces composing the outer surface of the voxel model.

In step 102, according to the three-dimensional coordinates of the target quadrilateral surface in the voxel model, the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map are determined.

In this embodiment, after the target quadrilateral surface of the voxel model is obtained, the texture of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map can be determined in combination with the three-dimensional coordinates of the target quadrilateral surface in the voxel model. Map coordinates, the graphics corresponding to the texture map coordinates is the texture map surface block, that is, the texture map surface block corresponding to each target four-sided surface is generated.

Exemplarily, the texture map surface block corresponding to the target quadrilateral surface can be generated based on maxscript (3ds Max built-in scripting language). Based on maxscript, the texture map surface block corresponding to the target four-sided surface is generated. Before generating the texture map surface block corresponding to the target four-sided surface, it is necessary to check whether the texture map channel is enabled. When it is checked that the texture map channel is not enabled, it is automatically enabled. Texture map channel, where the texture map channel can be used to adjust or store information related to model texture maps.

As shown in FIG. 3 , FIG. 3 is a plurality of texture map surface blocks obtained after the target four-sided surface of the voxel model shown in FIG. 2 is expanded by texture map. It should be noted that since the voxel model is composed of multiple cubes, the surface normals of the voxel model have 6 orientations, and there are three pairs of oppositely oriented surface normals, and the surface normals face the opposite target quadrilateral faces The corresponding texture map patches may overlap.

It should be noted that the schematic diagram of the texture map surface block corresponding to the target quadrilateral surface of the voxel model shown in FIG. 3 may be displayed in the graphical user interface, or may not be displayed in the graphical user interface. Generally, in the application method of generating an expanded texture map of a voxel model with one click, the user only needs to select the voxel model to be processed, and trigger the texture map expansion request to generate the expanded texture map corresponding to the voxel model, The expanded texture map corresponding to the voxel model is directly returned to the user. Therefore, the schematic diagram shown in FIG. 3 is generally not displayed in the GUI. In the application method of generating the expanded texture map of the voxel model in steps, that is, in the process of generating the expanded texture map of the voxel model, the user needs to trigger the corresponding request multiple times to execute the corresponding one based on one trigger request. The processing steps, therefore, the schematic diagram shown in Figure 3 can be presented in a graphical user interface.

In an optional embodiment of the present application, according to the three-dimensional coordinates of the target quadrilateral surface in the voxel model, the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map are determined process, which can include:

obtaining the three-dimensional coordinates of the geometric vertices of the target quadrilateral;

According to the three-dimensional coordinates of the geometric vertices, the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map are determined.

In this embodiment, the three-dimensional coordinates of the geometric vertices of the target quadrilateral surface can be obtained to determine the texture map coordinates of the positions corresponding to the geometric vertices in the corresponding texture map surface block, and then the texture map coordinates of the texture map surface block can be determined. The texture map coordinates of the texture map block include texture map coordinates of each point constituting the texture map block, and the texture map coordinates represent the identifier of the texture map block in the expanded texture map. Preferably, the target quadrilateral surface may be a regular square, thereby improving the efficiency of obtaining the three-dimensional coordinates of the geometric vertices of the target quadrilateral surface. Exemplarily, the target quadrilateral surface may also be an irregular quadrilateral.

Exemplarily, a space rectangular coordinate system of the voxel model can be established to determine the three-dimensional coordinates of the four geometric vertices of each target quadrilateral surface in the space rectangular coordinate system, and the three-dimensional coordinates are subjected to texture mapping coordinate transformation, and the target four sides can be obtained. The vertex texture map coordinates corresponding to the four vertices of the surface, and then determine the texture map surface block corresponding to the target four-sided surface. According to the position information of the texture map surface block in the texture map coordinates, the texture map coordinates of the texture map surface block can be determined.

In this embodiment, the three-dimensional coordinates of the geometric vertices of the target quadrilateral surface are used to determine the texture map coordinates of the texture map surface block, which can reduce the amount of calculation and improve the generation efficiency of the texture map surface block.

In another optional embodiment of the present application, determining the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map according to the three-dimensional coordinates of the geometric vertices includes:

The three-dimensional coordinates of the geometric vertices are converted into floating point coordinates, and the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map are determined based on the floating point coordinates.

In this embodiment, on the basis of determining the texture map coordinates of the texture map surface block according to the three-dimensional coordinates of the geometric vertices of the target four-sided surface, in the process of determining the texture map coordinates of the texture map surface block, the geometric vertices of the target four-sided surface are The three-dimensional coordinates of , are first converted into corresponding floating point coordinates, and then based on the floating point coordinates, the texture map surface block corresponding to the target four-sided surface and the texture map coordinates of the texture map surface block are determined. Preferably, the three-dimensional coordinates of the geometric vertices of the target quadrilateral face are converted into floating-point coordinates from 0 to 1. Using the floating-point coordinates from 0 to 1, the corresponding program code can be smoothly transitioned in different pixel backgrounds, thereby improving compatibility. sex.

Further, in some optional embodiments of the present application, before the texture map coordinates in the texture map are expanded to determine the texture map surface block corresponding to the target quadrilateral surface according to the three-dimensional coordinates of the geometric vertices, the method may further include: :

Sort the target quadrilateral faces according to their positional relationship in the voxel model, and determine the sequence number of the corresponding texture map block based on the sequence number of the target quadrilateral face;

The determination of the texture map coordinates in the expanded texture map of the texture map surface block corresponding to the target quadrilateral surface according to the three-dimensional coordinates of the geometric vertices may include:

The texture map coordinates of the corresponding texture map surface block in the expanded texture map are determined according to the three-dimensional coordinates of the geometric vertices of the target quadrilateral surface in sequence according to the serial number.

In this embodiment, before determining the texture map coordinates of the texture map surface block according to the three-dimensional coordinates of the geometric vertices of the target four-sided surface, the target four-sided surface and the texture map surface block are sorted first, so as to sequentially determine the texture map surface blocks according to the sequence of the serial numbers The texture map coordinates can reduce the difficulty of scripting and improve the efficiency of system operation.

Step 103, based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target four-sided surface on the voxel model, splicing the texture map surface blocks corresponding to the target four-sided surface with the same orientation into texture map images corresponding to the outer surfaces of the voxel model respectively.

According to the orientation of the target quadrilateral on the voxel model, the orientation of the corresponding texture map surface block can be determined. The orientation of the target quadrilateral can be determined by the surface normal of the target quadrilateral. Specifically, in the embodiment of the present application, the voxel model is composed of a plurality of cubes, and each cube includes 6 four-sided surfaces, that is, the surface normal of the target four-sided surface is one of the six orientations, and corresponds to the axial direction. The modulo length of the normal component value of is 1. The orientation of the face normal of the target quadrilateral can be used as the orientation of the corresponding texture map surface block. The texture map surface blocks with the same orientation are spliced according to the texture map coordinates of the texture map surface blocks to obtain at least one texture map image. It can be understood that a texture map image contains at least one texture map surface block, and the texture map image is used to represent voxels The plane of the outer surface in the pixel.

As shown in FIG. 4, FIG. 4 is a schematic diagram of obtaining a texture map image after splicing the texture map surface block shown in FIG. 3, wherein the thick line identification part in FIG. 4 is used to indicate the difference between different texture map images. A texture map image is obtained by splicing the texture map surface blocks inside the thick line frame. It should be noted that FIG. 4 only marks part of the dividing line. For the convenience of understanding, the texture map image corresponding to the plane marked in FIG. 2 is marked in FIG. 4 .

It should also be noted that the texture map image obtained after splicing as shown in FIG. 4 may be displayed in the graphical user interface, or may not be displayed in the graphical user interface. Generally, in the method of generating the expanded texture map of the voxel model with one click, the schematic diagram shown in FIG. 4 is generally not displayed in the GUI; in the method of generating the expanded texture map of the voxel model by steps, the schematic diagram shown in FIG. The schematic diagram shown can be displayed in a graphical user interface.

In an optional embodiment of the present application, based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target quadrilateral surface on the voxel model, the target quadrilateral surfaces with the same orientation are The process of splicing the corresponding texture map surface blocks into texture map images corresponding to the outer surfaces of the voxel model may include:

According to the texture map coordinates of the texture map surface block in the expanded texture map, sort the texture map surface blocks to obtain the serial number of the texture map surface block;

According to the orientation of the target quadrilateral face on the voxel model, the texture map surface blocks corresponding to the target quadrilateral face with the same orientation are divided into the same set;

For the texture map surface blocks in each set, the texture map surface blocks in the same set are spliced according to the serial numbers of the texture map surface blocks to obtain a texture map image.

In this embodiment, the texture map patches of the same orientation are spliced together with the serial numbers of the texture map patches, which can ensure the accuracy of the splicing result, and is easy to implement, that is, it can reduce the difficulty of corresponding script writing.

Among them, the process of sorting multiple texture map surface blocks to obtain the serial number of the texture map surface block can be sorted according to the position of the target quadrilateral surface in the voxel model to determine the serial number of the corresponding texture map surface block, or according to the texture The texture map coordinates of the texture surface block in the expanded texture map, sort the texture map surface blocks, and obtain the serial number of the texture map surface block, which is used to distinguish the four sides of different targets of the same plane that make up the outer surface of the voxel model. The corresponding texture map patch, and used to determine the order of stitching processing.

In this embodiment, the texture map surface blocks corresponding to the same target four-sided surface may be divided into the same set according to the orientation of the target four-sided surface, and for the texture map surface blocks in each set, according to the texture map surface The serial number of the block, and the texture map coordinates of the texture map surface block, determine the texture map edge of any two texture map surface blocks that overlap, and splicing the overlapping texture map edges. When all the overlapping texture map edges are spliced, we get The stitched image is the texture map image.

It should be noted that the order of the texture map surface blocks does not affect the splicing result. Therefore, in the embodiment of the present application, the process of determining the order of the texture map surface blocks is not limited.

Step 104: Arrange the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model, wherein each texture map surface block in the texture map image corresponds to the pixel grid A pixel in the grid.

In this embodiment of the present application, multiple texture map images are arranged in the pixel grid map, that is, the multiple texture map images do not overlap in the pixel grid map. Each texture map surface block in the texture map image corresponds to a pixel in the pixel grid map, that is, each texture map surface block coincides with a corresponding pixel in the pixel grid map to complete the texture of the voxel model. Map expansion, that is to say, the multiple texture map images arranged in the pixel grid image obtained in this step are the expanded texture maps of the voxel model.

In some optional embodiments of the present application, before the above-mentioned arranging the texture map image into the pixel grid map to obtain the expanded texture map of the voxel model, the method may further include:

A pixel grid map is determined according to the number of texture map surface blocks of the voxel model, and the pixel number of the pixel grid map is not less than the number of texture map surface blocks.

In this embodiment, the pixel grid map may be determined according to the number of texture surface blocks of the voxel model, wherein the number of pixels of the pixel grid map is not less than the number of texture map surface blocks, and the texture map image that needs to satisfy the voxel model can be One texture map surface block coincides with one pixel, and one pixel corresponds to at most one texture map surface block and is arranged in the pixel grid map to obtain the expanded texture map of the voxel model.

In some optional embodiments of the present application, the above-mentioned arrangement of multiple texture map images into a pixel grid map may include:

Get the first pixel grid image;

When the number of pixels of the first pixel grid image is less than the number of texture map surface blocks, acquire a second pixel grid image from the pixel grid library, and arrange the texture map image to the first pixel grid image. In a two-pixel grid map, to obtain an expanded texture map of the voxel model; the number of pixels in the second pixel grid map is not less than the number of texture map surface blocks;

When the number of pixels of the first pixel grid map is not less than the number of the texture map surface blocks, the texture map image is arranged in the first pixel grid map.

In this embodiment, multiple texture map images are arranged in a pixel grid map, and the first pixel grid map may be obtained first. When the number of pixels in the first pixel grid map is less than the number of texture map surface blocks of the voxel model , it can be considered that the texture map image of the voxel model cannot be arranged to the first pixel grid map according to the requirements of one texture map surface block and one pixel, and one pixel corresponds to at most one texture map surface block. In the library, select the second pixel grid image. The number of pixels in the second pixel grid image is not less than the number of texture map surface blocks. The second pixel grid map needs to meet the texture map image of the voxel model. The texture map image can be based on a texture map surface. The block coincides with one pixel, and one pixel corresponds to at most one texture map surface block and is arranged in the second pixel grid map to obtain the expanded texture map of the voxel model. When the number of pixels of the first pixel grid image is not less than the number of texture map surface blocks of the voxel model, that is, the texture map image of the voxel model can coincide with one pixel according to one texture map surface block, and one pixel corresponds to at most one pixel. When the requirements of a texture map surface block are arranged in the first pixel grid map, the texture map image can be directly arranged in the first pixel grid map to obtain the expanded texture map of the voxel model; thus, no manual evaluation is required. , to manually change the effect of the pixel grid image.

The first pixel grid image may refer to a currently used pixel grid image for arranging texture map images. In an example, the pixel grid library can sort the stored pixel grid images in descending order of size according to the size of the pixel grid image. When the current pixel grid image cannot make the texture map image of the voxel model When one texture map surface block coincides with one pixel, and one pixel corresponds to at most one texture map surface block, according to the sorting order of the current pixel grid map, update the current pixel grid map to the next adjacent pixel map. A sorted pixel grid map. Of course, the pixel grid images in the pixel grid gallery can also be sorted in descending order of size. When the current pixel grid images cannot be arranged, the current pixel grid images are sorted according to the sorting order of the current pixel grid images. The map is updated to the pixel grid map of the last sorted order adjacent to it, continuing with the steps of arranging the texture map image into the current pixel grid map. The size of the current pixel grid image determined for the first time can be set by the user, and can also be set by the system by default.

Exemplarily, a setting window for the pixel grid image size may be displayed in the graphical user interface, and in response to the setting operation for the pixel grid image size, the size corresponding to the setting operation is determined as the current pixel grid image size, and the The process of arranging multiple texture map images into the current pixel grid map, when the current pixel grid map cannot make the texture map image of the voxel model coincide with a pixel according to a texture map surface block, and When one pixel corresponds to at most one texture map surface block, select a pixel grid image one size larger than the current pixel grid image from the pixel grid library, and determine the selected pixel grid image as the current pixel grid image. Pixel grid, continuing the process of arranging multiple texture map images into the current pixel grid. Optionally, when the setting window of the pixel grid image size does not receive a relevant operation from the user within the specified time, the pixel grid image set by default by the system can be used, and the pixel grid image set by default by the system can be pixel grid image. The pixel grid image with the smallest size in the grid library; it can also be the pixel grid image customized by the user last time. When the triggering operation to expand the texture map of the voxel model is performed again, at this time, the size of the current pixel grid is 128*128 pixels; it can also be the last used pixel grid, the last used pixel grid The image can be specifically understood as the pixel grid image that is finally used when the texture map of the previous voxel model is expanded. It is also possible to determine the set of pixel grids in the pixel grid library with more pixels than the total number of texture map blocks by calculating the total number of texture map blocks contained in multiple texture map images that need to be arranged, and from this pixel Select the pixel grid image with the smallest size in the grid image collection as the default pixel grid image of the system.

Exemplarily, the setting window for the size of the pixel grid image may not be displayed, and the pixel grid image set by default by the system may be directly used. The pixel grid image set by default by the system can be the smallest pixel grid image in the pixel grid library, or the largest pixel grid image; it can also be the pixel grid image used last time; it can also be calculated as required The total number of texture map surface blocks contained in multiple texture map images arranged, that is, according to the number of texture map surface blocks of the voxel model, from the pixel grid library, the number of pixels obtained is more than the total number of texture map surface blocks. Pixel grid image as the default pixel grid image of the system. Or, according to the number of texture map patches of the voxel model, from the pixel grid library, obtain a pixel grid map set with more pixels than the number of texture map patches, and select a size from the pixel grid map set The smallest pixel grid image is used as the system default pixel grid image.

Further, in order to prevent the expanded texture map obtained by expanding the texture map from overflowing in the subsequent map making process, in an optional embodiment of the present application, the above-mentioned texture map image is arranged in the pixel grid map. , to obtain the unwrapped texture map of the voxel model, including:

Arranging the texture map images into a pixel grid map at specified intervals to obtain an expanded texture map of the voxel model.

The specified interval can be set by the user, or can be set by the system by default. Exemplarily, a setting window with a specified interval may be displayed in the graphical user interface, and in response to a user's setting operation for the specified interval, the pixels corresponding to the setting operation are determined as the specified interval, so as to arrange the plurality of texture map images according to the specified interval. To the pixel grid map, get the unwrapped texture map of the voxel model. Exemplarily, when the setting window of the specified interval does not receive the relevant operation of the user within the preset display time, the interval set by the system default can be used as the specified interval; wherein, the interval set by the system default can be a fixed value. , for example, the default interval set by the system can be 1 pixel, 3 pixels, 4 pixels, etc.; it can also be a dynamic value, the dynamic value can be the specified interval used last time, the specified interval used last time Can be the specified interval of the user's last custom setting.

Exemplarily, the setting window for the specified interval may not be displayed, and the specified interval set by the default system is directly used. The default interval set by the system can be a fixed value; it can also be a dynamic value, the dynamic value can be the specified interval used last time, and the specified interval used last time can be the specified interval set by the user last time. . As shown in Figure 5, Figure 5 is the expanded texture map corresponding to the voxel model shown in Figure 2. It should be noted that Figure 5 does not show the pixel grid in the pixel grid diagram; the texture map identified in Figure 5 The image is the texture map image corresponding to the plane identified in Figure 2. In the expanded texture map corresponding to the voxel model, each texture map surface block does not overlap, and the size is equal to the size of one pixel of the pixel grid map, and a certain interval is maintained between each texture map image in the expanded texture map to avoid subsequent Color overflow occurs in the process of map making.

In this embodiment of the present application, the target quadrilateral surface included in the outer surface of the voxel model to be processed is obtained, and the texture map surface block corresponding to the target quadrilateral surface is determined in the expanded texture map according to the three-dimensional coordinates of the target quadrilateral surface in the voxel model. The texture map coordinates of the target four-sided surface on the voxel model are combined with the orientation of the target four-sided surface on the voxel model, the texture map surface blocks corresponding to the target four-sided surface with the same orientation are spliced into the texture map image corresponding to the outer surface of the voxel model, and finally the texture map image According to the way that each texture map surface block corresponds to one pixel in the pixel grid map, it is arranged in the pixel grid map to obtain the expanded texture map of the voxel model; the expanded texture map of the voxel model can be automatically generated. In the process of generating the unfolded texture map of the voxel model in the embodiment of the present application, the texture map surface blocks corresponding to the target four-sided surface used to form the outer surface of the voxel model are obtained first, and then the texture map image is obtained by splicing. It can ensure the consistency of the texture map surface blocks in the texture map image, and solve the inconsistency of the texture map surface blocks obtained by manual manual segmentation in the prior art. For the problem of inaccurate mapping and low efficiency, the embodiments of the present application improve the efficiency and accuracy of generating an unfolded texture map.

It should be noted that, for the sake of simple description, the method embodiments are expressed as a series of action combinations, but those skilled in the art should know that the embodiments of the present application are not limited by the described action sequence, because According to the embodiments of the present application, certain steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present application.

Referring to FIG. 6, there is shown a structural block diagram of an embodiment of a texture map expansion device for a voxel model of the present application. Corresponding to the above-mentioned embodiment of the texture map expansion method for a voxel model, the texture map expansion device of the voxel model , which can include the following modules:

The target quadrilateral surface acquisition module 601 is used to acquire the target quadrilateral surface included in the outer surface of the voxel model to be processed;

A texture map surface block generation module 602, configured to determine the texture map coordinates of the texture map surface block corresponding to the target four-sided surface in the expanded texture map according to the three-dimensional coordinates of the target four-sided surface in the voxel model;

The texture map image generation module 603 is configured to, based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target four-sided surface on the voxel model, correspond to the target four-sided surface with the same orientation The texture map surface blocks are spliced into texture map images corresponding to the outer surfaces of the voxel model respectively;

The expanded texture map generation module 604 is used for arranging the texture map image into the pixel grid map to obtain the expanded texture map of the voxel model, wherein each texture map surface in the texture map image A block corresponds to a pixel in the pixel grid.

In an optional embodiment of the present application, the voxel model is composed of a plurality of cubes, each cube has six four-sided surfaces, and the target four-sided surface acquisition module 601 is used to obtain the four-sided surfaces of the cube that are not The four-sided surfaces of the cube whose four-sided surfaces overlap are determined as the target four-sided surfaces composing the outer surface of the voxel model; The four sides of the target.

In an optional embodiment of the present application, the texture map patch generation module 602 includes:

The first acquisition module is used to acquire the three-dimensional coordinates of the geometric vertices of the four-sided surface of the target;

The texture map coordinate determination module is configured to determine the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map according to the three-dimensional coordinates of the geometric vertices.

In an optional embodiment of the present application, the texture map coordinate determination module is configured to convert the three-dimensional coordinates of the geometric vertices into floating-point coordinates, and determine the corresponding four-sided surface of the target based on the floating-point coordinates. Texture map coordinates of the texture map patch in the unwrapped texture map.

In an optional embodiment of the present application, the texture map image generation module 603 includes:

a sorting module, configured to sort the texture map surface blocks according to the texture map coordinates of the texture map surface blocks in the expanded texture map to obtain the serial number of the texture map surface blocks;

A classification module, configured to divide the texture map face blocks corresponding to the target quadrilateral faces with the same orientation into the same set according to the orientation of the target quadrilateral face on the voxel model;

The splicing module is used for splicing the texture map surface blocks in the same set according to the serial numbers of the texture map surface blocks to obtain a texture map image.

In an optional embodiment of the present application, the device further includes:

A grid map determination module, configured to determine a pixel grid map according to the number of texture map surface blocks of the voxel model, where the number of pixels of the pixel grid map is not less than the number of texture map surface blocks.

In an optional embodiment of the present application, the expanded texture map generation module 604 includes:

a grid image acquisition module, used to acquire the first pixel grid image;

The first generation module is configured to obtain a second pixel grid image from the pixel grid library when the number of pixels of the first pixel grid image is less than the number of the texture map surface blocks, and use the texture map to obtain a second pixel grid image. The images are arranged in the second pixel grid map to obtain the expanded texture map of the voxel model; the number of pixels in the second pixel grid map is not less than the number of texture map surface blocks;

A second generating module, configured to arrange the texture map image into the first pixel grid map when the number of pixels of the first pixel grid map is not less than the number of the texture map surface blocks.

In an optional embodiment of the present application, the expanded texture map generation module 604 is configured to arrange the texture map images into a pixel grid map according to a specified interval, so as to obtain the expanded texture map of the voxel model .

As for the apparatus embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for related parts.

The embodiment of the present application also discloses an electronic device, including a processor, a memory, and a computer program stored on the memory and capable of running on the processor, the computer program being executed by the processor to achieve the above-mentioned The steps of the texture map unwrapping method of the voxel model.

Embodiments of the present application further disclose a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the above-described texture map expansion method for a voxel model are implemented.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments may be referred to each other.

Those skilled in the art should understand that the embodiments of the embodiments of the present application may be provided as methods, apparatuses, or computer program products. Accordingly, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The embodiments of the present application are described with reference to the flowcharts and/or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing terminal equipment to produce a machine that causes the instructions to be executed by the processor of the computer or other programmable data processing terminal equipment Means are created for implementing the functions specified in the flow or flows of the flowcharts and/or the blocks or blocks of the block diagrams.

These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing terminal equipment to operate in a particular manner, such that the instructions stored in the computer readable memory result in an article of manufacture comprising instruction means, the The instruction means implement the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing terminal equipment, so that a series of operational steps are performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby executing on the computer or other programmable terminal equipment The instructions executed on the above provide steps for implementing the functions specified in the flowchart or blocks and/or the block or blocks of the block diagrams.

Although the preferred embodiments of the embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the embodiments of the present application.

Finally, it should also be noted that in this document, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply these entities or that there is any such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or terminal device that includes a list of elements includes not only those elements, but also a non-exclusive list of elements. other elements, or also include elements inherent to such a process, method, article or terminal equipment. Without further limitation, an element defined by the phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, article or terminal device comprising said element.

The above provides a detailed introduction to a texture map expansion method and device for a voxel model, an electronic device and a storage medium provided by the present application. Specific examples are used in this paper to illustrate the principles and implementations of the present application. The above implementation The description of the example is only used to help understand the method of the present application and its core idea; meanwhile, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific embodiment and the scope of application. As stated, the contents of this specification should not be construed as limiting the application.

Claims (11)

1. a texture map expansion method of voxel model, is characterized in that, described method comprises: Obtain the target quadrilateral surface contained in the outer surface of the voxel model to be processed; According to the three-dimensional coordinates of the target quadrilateral surface in the voxel model, determine the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map; Based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target quadrilateral surface on the voxel model, the texture map surface blocks corresponding to the target four-sided surface with the same orientation are spliced into the Texture map images corresponding to the outer surface of the voxel model; Arranging the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model, wherein each texture map surface block in the texture map image corresponds to the pixel grid map of one pixel. 2 . The method according to claim 1 , wherein the voxel model is composed of a plurality of cubes, and each cube has six four-sided faces, and the acquisition of the target contained in the outer surface of the voxel model to be processed. 3 . Four sides, including: Determining the four-sided faces that do not coincide with the four-sided faces of other cubes among the four-sided faces of the cube as the target four-sided faces composing the outer surface of the voxel model; or, The four-sided surfaces that overlap among the plurality of cubes are culled to obtain the target four-sided surfaces composing the outer surface of the voxel model. 3 . The method according to claim 1 , wherein, according to the three-dimensional coordinates of the target quadrilateral in the voxel model, it is determined that the texture map surface block corresponding to the target quadrilateral is unfolding the texture. 4 . Texture map coordinates in the map, including: obtaining the three-dimensional coordinates of the geometric vertices of the target quadrilateral; According to the three-dimensional coordinates of the geometric vertices, the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map are determined. 4 . The method according to claim 3 , wherein, according to the three-dimensional coordinates of the geometric vertices, determining the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map, comprising: 4 . : The three-dimensional coordinates of the geometric vertices are converted into floating point coordinates, and the texture map coordinates of the texture map surface block corresponding to the target quadrilateral surface in the expanded texture map are determined based on the floating point coordinates. The method according to claim 4, wherein, based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target quadrilateral on the voxel model, the The texture map surface blocks corresponding to the target four-sided faces with the same orientation are spliced into texture map images corresponding to the outer surfaces of the voxel model, including: According to the texture map coordinates of the texture map surface block in the expanded texture map, sort the texture map surface blocks to obtain the serial number of the texture map surface block; According to the orientation of the target quadrilateral face on the voxel model, the texture map surface blocks corresponding to the target quadrilateral face with the same orientation are divided into the same set; For the texture map surface blocks in each set, the texture map surface blocks in the same set are spliced according to the serial numbers of the texture map surface blocks to obtain a texture map image. 6. The method of claim 1, wherein the method further comprises: A pixel grid map is determined according to the number of texture map surface blocks of the voxel model, and the pixel number of the pixel grid map is not less than the number of texture map surface blocks. 7. The method according to claim 1, wherein the arranging the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model; comprising: Get the first pixel grid image; When the number of pixels of the first pixel grid image is less than the number of texture map surface blocks, acquire a second pixel grid image from the pixel grid library, and arrange the texture map image to the first pixel grid image. In a two-pixel grid map, to obtain an expanded texture map of the voxel model; the number of pixels in the second pixel grid map is not less than the number of texture map surface blocks; When the number of pixels of the first pixel grid map is not less than the number of the texture map surface blocks, the texture map image is arranged in the first pixel grid map. 8. The method according to any one of claims 1-7, wherein the arranging the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model; comprising: : Arranging the texture map images into a pixel grid map at specified intervals to obtain an expanded texture map of the voxel model. 9. A texture map unfolding device for a voxel model, wherein the device comprises: The target quadrilateral surface acquisition module is used to acquire the target quadrilateral surface contained in the outer surface of the voxel model to be processed; a texture map surface block generation module, configured to determine the texture map coordinates of the texture map surface block corresponding to the target four-sided surface in the expanded texture map according to the three-dimensional coordinates of the target four-sided surface in the voxel model; The texture map image generation module is used for, based on the texture map coordinates of the texture map surface block in the expanded texture map and the orientation of the target quadrilateral on the voxel model, the target quadrilateral corresponding to the same orientation The texture map surface blocks are spliced into texture map images corresponding to the outer surfaces of the voxel model respectively; An expanded texture map generation module, configured to arrange the texture map image into a pixel grid map to obtain an expanded texture map of the voxel model, wherein each texture map surface block in the texture map image Corresponds to a pixel in the pixel grid. 10. An electronic device, characterized in that it comprises a processor, a memory and a computer program stored on the memory and capable of running on the processor, the computer program being executed by the processor to implement the claims The steps of the texture map expansion method of the voxel model according to any one of requirements 1 to 8 are required. 11. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the system according to any one of claims 1 to 8 is implemented. Steps of the texture map unwrapping method of the voxel model.

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