CN115019020A - Model shadow generation method, device, readable storage medium and electronic device - Google Patents

Abstract

The embodiment of the present disclosure provides a model shadow generation method, a model shadow generation apparatus, a medium, and a device; the method comprises the following steps: generating a projection panel beside the model, and converting the vertex position of the projection panel into a light source space; acquiring a depth map of the model in the light source space, acquiring first depth values of a plurality of vertex positions of the projection panel under the light source space, wherein the depth map comprises second depth values of the plurality of vertex positions of the model in the light source space; comparing the second depth value of the depth map with the first depth value of the projection panel, and distinguishing the projection panel into a first part and a second part according to a comparison result; the projection panel including the first portion and the second portion is treated as a shadow. Therefore, by implementing the technical scheme of the embodiment of the disclosure, the limited degree of shadow generation can be reduced, the performance pressure of shadow generation is reduced, and the calculation efficiency is improved.

Description

Model shadow generation method, device, readable storage medium and electronic device

technical field

The present disclosure relates to the field of virtual display technology, and in particular, to a model shadow generation method, a model shadow generation device, a computer-readable storage medium, and an electronic device.

Background technique

With the development of computer technology, virtual scenes have gradually played their role in all aspects of study, life and work. People are constantly pursuing the authenticity of virtual scenes, and there are many ways to improve the authenticity. For example, shadows can be added to the models in the virtual scenes to make the models more three-dimensional and the scenes more realistic.

In the current solution, to perform shadow generation processing on a model, other models in the scene are required to carry shadows before the projection can be presented, resulting in limited shadow generation; moreover, when there are many models in the scene, it will also cause greater performance. Pressure, which affects rendering efficiency and rendering effect.

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

The purpose of the embodiments of the present disclosure is to provide a model shadow generation method, a model shadow generation device, a computer-readable storage medium, and an electronic device. By generating a projection panel next to the model, the vertex position of the projection panel is converted to the light source space; the depth map of the model in the light source space is collected, and the depth value of the projection panel in the light source space is collected; the second depth value of the depth map and The size of the first depth value of the projection panel, and the shadow is obtained according to the comparison result. It can reduce the throttling degree of shadow generation, reduce the performance pressure of shadow generation and improve computational efficiency.

A first aspect of the embodiments of the present disclosure provides a model shadow generation method, the method comprising:

A projection panel is generated next to the model, and the vertex positions of the projection panel are converted into the light source space;

Collect a depth map of the model in the light source space, and collect first depth values of multiple vertex positions of the projection panel in the light source space, wherein the depth map includes multiple vertex positions of the model in a second depth value in the light source space;

comparing the magnitudes of the second depth value of the depth map and the first depth value of the projection panel, and distinguishing the projection panel into a first part and a second part according to the comparison result;

The projection panel including the first part and the second part is used as a shadow.

In an exemplary embodiment of the present disclosure, the step of converting the vertex position of the projection panel to the light source space includes:

Converts the vertex positions of the projection panel from model space to world space, and then from said world space to light space.

In an exemplary embodiment of the present disclosure, the step of distinguishing the projection panel into a first part and a second part according to a comparison result includes:

When the second depth value of the depth map is smaller than the first depth value of the projection panel, display in a first state;

When the second depth value of the depth map is greater than the first depth value of the projection panel, display in a second state;

The portion of the projection panel that is displayed in the first state is referred to as the first portion, and the portion of the projection panel that is displayed in the second state is referred to as the second portion.

In an exemplary embodiment of the present disclosure, after the step of using the projection panel including the first portion and the second portion as a shadow, the method further includes:

The second part is culled and the first part is kept as the final shadow result.

In an exemplary embodiment of the present disclosure, the step of generating a projection panel beside the model includes:

Generate a horizontally placed projection panel below the model;

Wherein, the top of the model is the first direction of the light source position of the model pointing to the light source space, and the bottom of the model is the opposite direction of the first direction.

In an exemplary embodiment of the present disclosure, the method further includes:

A background panel perpendicular to the horizontal direction is generated behind the model, and the background panel is perpendicular to the projection panel for carrying other rendering contents;

Wherein, the front of the model is the second direction in which the model points to the virtual camera in the light source space, and the rear of the model is the opposite direction of the second direction.

In an exemplary embodiment of the present disclosure, the step of comparing the magnitude of the second depth value of the depth map and the first depth value of the projection panel includes:

Taking a second depth value and a first depth value with the same coordinates in the coordinate system constructed under the light source space as a comparison group;

According to a plurality of second depth values of the depth map and a plurality of first depth values of the projection panel, a plurality of comparison groups are determined for size comparison respectively.

According to a second aspect of the embodiments of the present disclosure, there is provided an apparatus for generating model shadows, the apparatus comprising:

a projection panel module, used for generating a projection panel beside the model, and converting the vertex position of the projection panel to the light source space;

a depth acquisition module, configured to collect a depth map of the model in the light source space, and collect first depth values of multiple vertex positions of the projection panel in the light source space, wherein the depth map includes the model The second depth value of the plurality of vertex positions in the light source space;

a depth comparison module, configured to compare the magnitudes of the second depth value of the depth map and the first depth value of the projection panel, and to distinguish the projection panel into a first part and a second part according to the comparison result;

A shadow result module, configured to use the projection panel including the first part and the second part as a shadow.

In an exemplary embodiment of the present disclosure, the projection panel module is configured to convert the vertex positions of the projection panel from the model space to the world space, and then from the world space to the light source space.

In an exemplary embodiment of the present disclosure, the depth comparison module is configured to enter a first state when the second depth value of the depth map is smaller than the first depth value of the projection panel to display;

When the second depth value of the depth map is greater than the first depth value of the projection panel, display in a second state;

The portion of the projection panel that is displayed in the first state is referred to as the first portion, and the portion of the projection panel that is displayed in the second state is referred to as the second portion.

In an exemplary embodiment of the present disclosure, the apparatus further includes:

a culling module for culling the second part and retaining the first part after the step of using the projection panel including the first part and the second part as a shadow, and using the first part as a final shadow result.

In an exemplary embodiment of the present disclosure, the projection panel module is used to generate a horizontally placed projection panel under the model;

Wherein, the top of the model is the first direction of the light source position of the model pointing to the light source space, and the bottom of the model is the opposite direction of the first direction.

In an exemplary embodiment of the present disclosure, the apparatus further includes:

The background panel module is used to generate a background panel perpendicular to the horizontal direction behind the model, and the background panel is perpendicular to the projection panel for carrying other rendering contents;

Wherein, the front of the model is the second direction in which the model points to the virtual camera in the light source space, and the rear of the model is the opposite direction of the second direction.

In an exemplary embodiment of the present disclosure, the depth comparison module is configured to use a second depth value and a first depth value with the same coordinates in the coordinate system constructed in the light source space as a comparison Group;

According to a plurality of second depth values of the depth map and a plurality of first depth values of the projection panel, a plurality of comparison groups are determined for size comparison respectively.

According to a third aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, implements the method for generating model shadows according to the first aspect of the foregoing embodiments.

According to a fourth aspect of the embodiments of the present disclosure, there is provided an electronic device, comprising: one or more processors; a storage device for storing one or more programs, when the one or more programs are processed by one or more When the processor is executed, one or more processors are made to implement the model shadow generation method described in the first aspect of the above embodiment.

According to a fifth aspect of the present disclosure, there is provided a computer program product or computer program comprising computer instructions stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the computer device to perform the methods provided in the various optional implementations described above.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

In the technical solutions provided by some embodiments of the present disclosure, a projection panel can be generated beside the model to convert the vertex position of the projection panel to the light source space; the depth map of the model in the light source space is collected, and the projection panel is collected The depth value in the light source space; compare the two depth values, and divide the projection panel into the first part and the second part according to the comparison result to obtain the shadow. Implementing the embodiments of the present disclosure, on the one hand, by generating a projection panel, it is no longer necessary to include more other models, such as ground models, in the scene when generating shadows, which reduces performance pressure; To obtain shadows, other models are no longer required, which can make shadow generation less restrictive, and no longer need to perform shadow calculations between model resources in the scene, which improves computational efficiency and shadow controllability.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 schematically shows a schematic diagram of an exemplary terminal device to which a model shadow generation method and a model shadow generation apparatus according to an embodiment of the present disclosure can be applied;

FIG. 2 schematically shows a flowchart of a model shadow generation method according to an embodiment of the present disclosure;

FIG. 3 schematically shows a schematic interface diagram of depth value comparison according to an embodiment of the present disclosure;

FIG. 4 schematically shows a schematic interface diagram of a model, a background panel and a projection panel according to an embodiment of the present disclosure;

FIG. 5 schematically shows a structural block diagram of a model shadow generating apparatus according to an embodiment of the present disclosure;

FIG. 6 schematically shows a schematic structural diagram of a computer system suitable for implementing a terminal device according to an embodiment of the present disclosure.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be employed. In other instances, well-known solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repeated descriptions will be omitted. Some of the block diagrams shown in the figures are functional entities that do not necessarily necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

FIG. 1 shows a schematic diagram of an exemplary terminal device to which a model shadow generation method and a model shadow generation apparatus according to an embodiment of the present disclosure can be applied.

As shown in FIG. 1 , the terminal device may include one or more of the terminal devices 101 , 102 and 103 . The terminal devices 101, 102, 103 may be various electronic devices with display screens, including but not limited to desktop computers, portable computers, smart phones, tablet computers, and the like.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more logical functions for implementing the specified functions executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams or flowchart illustrations, and combinations of blocks in the block diagrams or flowchart illustrations, can be implemented in special purpose hardware-based systems that perform the specified functions or operations, or can be implemented using A combination of dedicated hardware and computer instructions is implemented.

The units involved in the embodiments of the present disclosure may be implemented in software or hardware, and the described units may also be provided in a processor. Among them, the names of these units do not constitute a limitation on the unit itself under certain circumstances.

As another aspect, the present disclosure also provides a computer-readable storage medium. The computer-readable storage medium may be included in the terminal device described in the above embodiments; or may exist alone without being assembled into the terminal device. The above-mentioned computer-readable storage medium carries one or more programs, and when the above-mentioned one or more programs are executed by a terminal device, the terminal device can implement the methods described in the following embodiments. For example, the terminal device can implement the steps shown in FIG. 2 and the like.

The model in the exemplary embodiment of the present disclosure is located in a virtual scene. The scene may be a digital scene outlined by intelligent terminal devices such as computers, mobile phones, and tablet computers through digital communication technology. The digital scene may be displayed on the display screen of the intelligent terminal device. , or projected to other display devices. The virtual scene may include buildings or structures such as houses, buildings, gardens, bridges, pools, etc., and may also include natural landscapes such as mountains, rivers, lakes, and any virtual items such as tools and creatures, which are not done in this exemplary embodiment. Special restrictions.

This example embodiment provides a model shadow generation method. Referring to FIG. 2 , the model shadow generation method may include the following steps:

Step S210 , generating a projection panel beside the model, and converting the vertex position of the projection panel to the light source space.

Step S220: Collect a depth map of the model in the light source space, and collect first depth values of multiple vertex positions of the projection panel in the light source space, wherein the depth map includes multiple The second depth value of the vertex position in the light source space.

Step S230 , comparing the magnitudes of the second depth value of the depth map and the first depth value of the projection panel, and distinguishing the projection panel into a first part and a second part according to the comparison result.

Step S240, using the projection panel including the first part and the second part as a shadow.

To implement the model shadow generation method shown in FIG. 3, a projection panel can be generated beside the model to convert the vertex position of the projection panel to the light source space; the depth map of the model in the light source space is collected, and the projection panel is collected in the light source space. The depth value below; compare the two depth values, and divide the projection panel into the first part and the second part according to the comparison result to get the shadow. Implementing the embodiments of the present disclosure, on the one hand, by generating a projection panel, it is no longer necessary to include more other bearing models such as ground models in the scene when generating shadows, which reduces the pressure on rendering performance, and no longer needs to be done in the scene. The calculation of each model resource improves the calculation efficiency; on the other hand, obtaining shadows through the projection panel eliminates the need for other models, making shadow generation less restrictive and more flexible.

Hereinafter, the above steps of the present exemplary embodiment will be described in more detail.

In step S210, a projection panel is generated beside the model, and the vertex positions of the projection panel are converted into the light source space.

The light source space refers to the three-dimensional space constructed with the light or other light source as the origin. You can convert the vertex position of the projection panel to the light source space through the engine matrix, use the C# script to pass the Transform information of the object into the Shader, and then manually construct the matrix of the model to the light source space based on this information.

In embodiments of the present disclosure, the projection panel itself may be a model. Generate projection panels next to the model, either in any relative direction to the model, such as above or below the model. For example, when the model is a character model, a projection panel model can be generated at the foot of the model, the projection panel model is only used to carry shadows, and the rendering amount is smaller than the actual ground model or floor model.

In one embodiment, the model may not have directional features similar to the character model; above the head of the iru character model is above, and below the footsteps is below. When the model is spherical, the direction from the spherical model to the light source in the light source space can be used as the upper part of the model; further, the vertical component of this direction can be taken as the upper part of the model.

In step S220, a depth map of the model in the light source space is collected, and first depth values of multiple vertex positions of the projection panel in the light source space are collected, wherein the depth map includes the depth map of the model. a second depth value of the plurality of vertex positions in the light source space.

In this embodiment of the present disclosure, a depth image is also called a range image, which refers to an image in which the distance (depth) from an image collector or a virtual camera to each point in the scene is taken as a pixel value, It can reflect the geometric shape of the surface of the object.

The depth map (shadow map) can be understood as a depth image in the light source space, which records the depth from the light source position to the nearest surface of the scene object, that is, the depth from the light source position to the nearest surface. In this embodiment of the present disclosure, it may include To the projection panel and the surface of the model, that is, the depth map contains the second depth values of the multiple vertex positions of the model in the light source space, and also includes the second depth value of the projection panel in the light source space. Often used to generate shadows for direction lights. It can also be a point light source, corresponding to omnidirectional shadow maps.

To obtain the depth map, the method can be to mount a camera on the light source and display it in an orthogonal manner. The light source camera needs to see the model to be projected. Then mount the camera rendering depth script to the light source camera, bind the RenderTexture to the RenderTarget for the light source camera in the editor, and create it directly in the Project panel. The resolution can be set to 1024. To process the incoming script of the light source depth map and the light source camera matrix, the projection matrix needs to be processed by the conversion function of the GL class to prevent inconsistency between OpenGL and DX. This script can then be mounted on the main camera or GameObject. The last is the shader that receives the Shadowmap and compares the distance between the two pixel positions. It can also be through the pcf5x5 method, the VSM method or other methods. Again, the embodiments of the present disclosure are not limited.

The depth map is obtained in the light source space, so after converting the vertex position of the projection panel to the light source space, and then collecting the depth value of the projection panel can make the depth information unified. The first depth value of each vertex position is obtained according to the distance from the vertex position on the projection panel to the light source.

In step S230, the magnitudes of the second depth value of the depth map and the first depth value of the projection panel are compared, and the projection panel is divided into a first part and a second part according to the comparison result.

In the process of comparing the depth value of the depth map and the depth value of the projection panel, there are generally two comparison results. That is, the depth value of the depth map of a certain point is smaller than the depth value of the corresponding point on the projection panel; or the depth value of the depth map of a certain point is greater than the depth value of the corresponding point on the projection panel. Then the corresponding points of the first comparison result can be displayed in a first state, such as pure white, and the set of corresponding points of the first comparison result can be used as the first part, then the first comparison result can be displayed in a second state, such as pure black, and the first comparison result can be displayed in a second state, such as pure black. The set of corresponding points of the two comparison results is displayed as the second part.

In one embodiment, both the depth map and the projection panel are obtained in the light source space, so both are applicable to the same three-dimensional coordinate system constructed based on the light source space. The depth map is actually obtained based on the projection panel and the model on the projection panel, so a second depth value and a first depth value with the same coordinates in the coordinate system constructed in the light source space can be used as a comparison. Group. According to the plurality of second depth values in the depth map and the first depth values of the plurality of vertex positions of the projection panel, a plurality of comparison groups are determined for size comparison respectively.

In step S240, the projection panel including the first part and the second part is used as a shadow.

Since the first part and the second part are displayed in different ways, on the basis that the two parts are displayed in different ways, the display modes of the first part and the second part, such as display colors, can be further set. For example, set the first part to be displayed in black and the second part to be displayed in white, and you can get the shadow of the model.

As shown in FIG. 3 , it includes a depth map 310 obtained by a character model in the scene, a depth value map 320 of the vertex positions of the projection panel, and a projection panel 330 after comparison. The projection panel 330 includes a black first part and a white second part. part. Because the vertex positions on the projection panel are each at different distances from the light source in the light source space, the depth values on the depth value map 320 of the vertex positions of the projection panel are not uniform.

An embodiment of the present disclosure further provides an implementation manner of a model shadow generation method. The step of converting the vertex position of the projection panel to the light source space includes:

Converts the vertex positions of the projection panel from model space to world space, and then from said world space to light space.

In this embodiment of the present disclosure, the model space refers to a certain model or object. Model space is also known as object space or local space. Each model has its own independent coordinate space, and when its coordinate space moves or rotates, the model space also moves and rotates with it. When the game model is moved, the model space moves with it.

World space is a special coordinate system that can be used to describe absolute positions (referring to positions in the world coordinate system). Usually the origin of world space is placed in the center of the game space. All objects are placed centered at the world space position (0, 0, 0). To create a world space matrix, transform the object (eg translate, rotate, scale). World space is defined by each object's transformation, displacement, rotation, and scaling. The world space matrix transforms object vertices from its own model space into world space, and then from said world space into light space.

To construct a transformation matrix for transforming an object from model space to world space, it is necessary to obtain its transformation information in world space, which can be done through the matrix unity_ObjectToWorld of Unity (3D interactive content creation and operation platform). You can also use the C# script to pass the Transform information of the object into the Shader, and then manually construct the matrix of the model to the world space based on this information. After obtaining the information, construct five 4x4 matrices in the Shader, which are translation matrices, three Rotation matrix, and scaling matrix. The embodiments of the present disclosure do not limit how to transfer the vertex positions of the projection panel from the model space to the world space.

An embodiment of the present disclosure further provides an implementation manner of a method for generating shadows of a model. After the step of using the projection panel including the first part and the second part as a shadow, the method further includes:

The second part is culled and the first part is kept as the final shadow result.

In the embodiment of the present disclosure, the obtained projection panel includes a first part and a second part; wherein, according to different parts corresponding to different display modes, the first part can completely represent the shadow range, and the second part of the projection panel can be eliminated by eliminating to keep the first part.

For example, the second part can be removed by reverse culling. The comparison result when the depth value of the depth map of a certain point is smaller than the depth value of the corresponding point on the projection panel is taken as 1, and the second part of the depth map of a certain point is taken as 1. When the depth value is greater than the first depth value of the corresponding point on the projection panel, the comparison result is taken as 0, and then the result value is exchanged to complete reverse culling.

Embodiments of the present disclosure are implemented by deleting the second part and retaining the first part after the step of using the projection panel including the first part and the second part as a shadow, and using the first part as the final shadow result. It can further reduce the resources contained in the scene and reduce the performance pressure.

In actual scene rendering, complex scenes are often rendered, which may include character models, architectural models, environment models, and so on. For example, when performing shadow generation on a character model, a building model may be behind the character model, and the character model and the building model behind the character model together constitute a complete picture. However, in the case of too many models, the rendering pressure is relatively high, which may lead to poor rendering accuracy of the model, lack of rendering results, etc.

Based on this, an embodiment of the present disclosure further proposes an implementation manner of a method for generating shadows of a model. The method also includes:

A background panel perpendicular to the horizontal direction is generated behind the model, and the background panel is perpendicular to the projection panel for carrying other rendering contents;

Wherein, the front of the model is the second direction in which the model points to the virtual camera in the light source space, and the rear of the model is the opposite direction of the second direction.

In the embodiment of the present disclosure, the determination of the front of the model or the rear of the model is the same as the determination of the above or the bottom of the model, which will not be repeated here.

In this embodiment of the present disclosure, other models other than the models that need to be generated by projection can be rendered on the background panel as two-dimensional images, that is, a large number of models to be generated are replaced by two-dimensional images, and no rendering is required. More 3D models. Compared with the need to render a 3D model, rendering a 2D image on the background panel requires less performance, and even rendering a high-precision 2D image will not cause a lot of performance pressure. In addition, the content used to implement user functions in the user interaction interface can also be displayed on the background panel without requiring additional other three-dimensional models.

For example, as shown in FIG. 4 , a background panel 410 , a projection panel 420 and a virtual camera 430 are included. The virtual camera 430 is used for framing in the virtual scene, and the framing content will be conveyed to the user through a graphical user interface. This embodiment does not limit the relative height and relative angle between the virtual camera 430 and the character model. The background panel 410 is positioned behind the character model, the projection panel 420 is positioned below the character model, the projection panel 420 is placed horizontally below the character model, and the background panel 410 is placed vertically behind the character model.

By implementing the embodiments of the present disclosure, a background panel is generated beside the model to carry other rendering contents. It is no longer necessary to place other model resources in the scene during screen rendering, which reduces the pressure on rendering performance; in addition, the background panel is used to carry other rendering content, which can maintain the integrity and richness of the scene. Carrying a two-dimensional image can improve the fineness of the scene picture.

Further, in this exemplary embodiment, a model shadow generating apparatus is also provided. Referring to Fig. 5, the model shadow generating apparatus 500 may include:

The projection panel module 501 is used to generate a projection panel beside the model, and convert the vertex position of the projection panel to the light source space;

A depth acquisition module 502, configured to collect a depth map of the model in the light source space, and collect first depth values of multiple vertex positions of the projection panel in the light source space, wherein the depth map includes the a second depth value of the plurality of vertex positions of the model in the light source space;

A depth comparison module 503, configured to compare the size of the second depth value of the depth map and the first depth value of the projection panel, and distinguish the projection panel into a first part and a second part according to the comparison result ;

The shadow result module 504 is configured to use the projection panel including the first part and the second part as a shadow.

In an exemplary embodiment of the present disclosure, the projection panel module is configured to convert the vertex positions of the projection panel from the model space to the world space, and then from the world space to the light source space.

In an exemplary embodiment of the present disclosure, the depth comparison module is configured to enter a first state when the second depth value of the depth map is smaller than the first depth value of the projection panel to display;

When the second depth value of the depth map is greater than the first depth value of the projection panel, display in a second state;

The portion of the projection panel that is displayed in the first state is referred to as the first portion, and the portion of the projection panel that is displayed in the second state is referred to as the second portion.

In an exemplary embodiment of the present disclosure, the apparatus further includes:

a culling module for culling the second part and retaining the first part after the step of using the projection panel including the first part and the second part as a shadow, and using the first part as a final shadow result.

In an exemplary embodiment of the present disclosure, the projection panel module is used to generate a horizontally placed projection panel under the model;

Wherein, the top of the model is the first direction of the light source position of the model pointing to the light source space, and the bottom of the model is the opposite direction of the first direction.

In an exemplary embodiment of the present disclosure, the apparatus further includes:

The background panel module is used to generate a background panel perpendicular to the horizontal direction behind the model, and the background panel is perpendicular to the projection panel for carrying other rendering contents;

Wherein, the front of the model is the second direction in which the model points to the virtual camera in the light source space, and the rear of the model is the opposite direction of the second direction.

In an exemplary embodiment of the present disclosure, the depth comparison module is configured to use a second depth value and a first depth value with the same coordinates in the coordinate system constructed in the light source space as a comparison Group;

According to a plurality of second depth values of the depth map and a plurality of first depth values of the projection panel, a plurality of comparison groups are determined for size comparison respectively.

FIG. 6 shows a schematic structural diagram of a computer system suitable for implementing a terminal device according to an embodiment of the present disclosure.

It should be noted that the computer system of the terminal device shown in FIG. 6 is only an example, and should not impose any limitations on the functions and scope of use of the embodiments of the present disclosure.

The computer system includes a central processing unit (CPU) that can perform various appropriate actions and processes according to programs stored in a read only memory (ROM) or loaded from a storage section into a random access memory (RAM) 203 . In (RAM), various programs and data necessary for system operation are also stored. (CPU), (ROM), and (RAM) are connected to each other through a bus. Input/output (I/O) interfaces are also connected to the bus.

The following components are connected to the (I/O) interface: an input section including a keyboard, a mouse, etc.; an output section including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section including a hard disk, etc.; and Includes the communication part of a network interface card such as a LAN card, modem, etc. The communication section performs communication processing via a network such as the Internet. Drives are also connected to the (I/O) interface as required. Removable media, such as magnetic disks, optical disks, magneto-optical disks, semiconductor memories, etc., are mounted on the drive as needed, so that the computer program read therefrom is installed into the storage section as needed.

In particular, according to embodiments of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer-readable storage medium, the computer program containing program code for performing the method illustrated in the flowchart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication portion, and/or installed from a removable medium. When the computer program is executed by a central processing unit (CPU), the various functions defined in the method and apparatus of the present disclosure are performed. It should be noted that although several modules or units of the apparatus for action performance are mentioned in the above detailed description, this division is not mandatory. Indeed, according to embodiments of the present disclosure, the features and functions of two or more modules or units described above may be embodied in one module or unit. Conversely, the features and functions of one module or unit described above may be further divided into multiple modules or units to be embodied.

Since each functional module of the virtual prop exchanging apparatus of the exemplary embodiment of the present disclosure corresponds to the steps of the above-mentioned exemplary embodiment of the virtual prop exchanging method, for details and effects not disclosed in the apparatus embodiment of the present disclosure, please refer to the above-mentioned example of the present disclosure. An embodiment of the virtual prop exchange method.

The above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), or one or more microprocessors (Digital Singnal) Processor, referred to as DSP), or, one or more Field Programmable Gate Array (Field Programmable Gate Array, referred to as FPGA) and the like. For another example, when one of the above modules is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU for short) or other processors that can call program codes. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC for short).

In the embodiments provided in the present disclosure, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to execute the various embodiments of the present invention. part of the method.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or replacements, which should be covered within the scope of the present application. within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. a model shadow generation method, is characterized in that, described method comprises: A projection panel is generated next to the model, and the vertex positions of the projection panel are converted into the light source space; Collect a depth map of the model in the light source space, and collect first depth values of multiple vertex positions of the projection panel in the light source space, wherein the depth map includes multiple vertex positions of the model in a second depth value in the light source space; comparing the magnitudes of the second depth value of the depth map and the first depth value of the projection panel, and distinguishing the projection panel into a first part and a second part according to the comparison result; The projection panel including the first part and the second part is used as a shadow. 2. The method according to claim 1, wherein the step of converting the vertex position of the projection panel to the light source space comprises: Converts the vertex positions of the projection panel from model space to world space, and then from said world space to light space. 3. The method according to claim 1, wherein the step of distinguishing the projection panel into the first part and the second part according to the comparison result comprises: When the second depth value of the depth map is smaller than the first depth value of the projection panel, display in a first state; When the second depth value of the depth map is greater than the first depth value of the projection panel, display in a second state; The portion of the projection panel that is displayed in the first state is referred to as the first portion, and the portion of the projection panel that is displayed in the second state is referred to as the second portion. 4. The method of claim 3, wherein after the step of using the projection panel including the first part and the second part as a shadow, the method further comprises: The second part is culled and the first part is kept as the final shadow result. 5. The method according to claim 1, wherein the step of generating a projection panel beside the model comprises: Generate a horizontally placed projection panel below the model; Wherein, the top of the model is the first direction of the light source position of the model pointing to the light source space, and the bottom of the model is the opposite direction of the first direction. 6. The method of claim 1, wherein the method further comprises: A background panel perpendicular to the horizontal direction is generated behind the model, and the background panel is perpendicular to the projection panel for carrying other rendering contents; Wherein, the front of the model is the second direction in which the model points to the virtual camera in the light source space, and the rear of the model is the opposite direction of the second direction. 7. The method according to claim 1, wherein the step of comparing the magnitude of the second depth value of the depth map and the first depth value of the projection panel comprises: Taking a second depth value and a first depth value with the same coordinates in the coordinate system constructed under the light source space as a comparison group; According to a plurality of second depth values of the depth map and a plurality of first depth values of the projection panel, a plurality of comparison groups are determined for size comparison respectively. 8. A model shadow generation device, wherein the device comprises: a projection panel module, used for generating a projection panel beside the model, and converting the vertex position of the projection panel to the light source space; a depth acquisition module, configured to collect a depth map of the model in the light source space, and collect first depth values of multiple vertex positions of the projection panel in the light source space, wherein the depth map includes the model The second depth value of the plurality of vertex positions in the light source space; a depth comparison module, configured to compare the magnitudes of the second depth value of the depth map and the first depth value of the projection panel, and to distinguish the projection panel into a first part and a second part according to the comparison result; A shadow result module, configured to use the projection panel including the first part and the second part as a shadow. 9 . A computer-readable storage medium on which a computer program is stored, characterized in that, when the program is executed by a processor, the method for generating model shadows according to any one of claims 1 to 7 is implemented. 10. An electronic device, comprising: one or more processors; A storage device for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement any one of claims 1 to 7 A model shadow generation method as described.

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