# Complexity Computer Simulation in the Study of the Overall Playing Method of Campus Football

Authors: Zhao Dai
Journal: Complexity
 (2021)

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## Abstract

With the mutual exchange and integration of world football, modern football is in an increasingly comprehensive direction. This research mainly discusses complexity computer simulation in the study of the overall play of campus football. Complexity computer simulation is used to design the background of the simulated football field, and the area is divided according to the size ratio of the actual football field. Then, it uses drawing software to draw the football and player controls. The construction of the knowledge base of this paper is mainly combined with the functional modules of rapid formation and response tactics. In the fast formation function, the required formation can be quickly given through football experience and knowledge rules. In the applied tactics function, for the responsibilities of forwards, midfielders, defenders, and other roles, the tactics implemented are given, including partially coordinated offensive and defensive tactics, personal offensive and defensive tactics, and set-ball tactics. The “holistic play” football tactics studied in this paper use XML files as recording and playback data, which not only greatly reduce the amount of file data but also make the operation of XML files intuitive and simple. XML can not only realize the recording and playback of player and football track but also be used in the function of rapid formation. The coach uses the “holistic play” football tactics simulation to demonstrate the movement route through the image, guide the players in each position to perceive the game scene by observing the movement route, and analyze and judge the tactical coordination of their respective positions. The computer simulation tactical analysis of the precision of the passing and running and the path coefficient of the passing factor is 0.606 and 0.59, respectively. This research helps to provide guidance on the overall playing tactics of football.


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## Body

## 1. Introduction

Particularly after the Second World War, the relatively stable politics and economy around the world have provided a good environment for football. The large flow of football talents around the world has made the gap between the levels of each team smaller and smaller. The confrontation is getting more and more fierce, the speed is getting faster and faster, especially the acceleration of the offensive and defensive conversion speed, which is an important direction for modern football skills and tactics, scoring is the focus of offense and defense and the purpose of the team’s offense, and also a ball comprehensive manifestation of the team’s offensive ability has become one of the issues to be solved by the football offensive in the world.Shooting as the focus of offense and defense will always become a worldwide problem. Goal scoring has also promoted changes in football match formations. Skills, tactics, and training methods have always been developed and changed around goal scoring. The tendency is to focus more and more on defense. For this reason, on the football field, the football teams compete fiercely around shooting goals and preventing shooting goals. This is also the most important and sensitive content in modern football. Therefore, football experts have always regarded the shooting and scoring conditions of the highest level of football matches as an important window for insight and analysis of the characteristics and trends of world football.As the key of virtual reality, complexity computer simulation has been widely used in the field of sports. AhmedG demonstrated a Ku-band patch antenna with a larger bandwidth. He used the skills of Defective Ground Structure (DGS) and Defect Driven Patch to expand his BW. He proposed an impedance bandwidth of 8 GHz. It can be easily installed in related convenient electronic devices. In this case, computer software called complexity computer simulation will be used for investigation and analysis. Although the simulation design in his research shows very good gain and efficiency, the research lacks novelty [1]. Yili S believes that this revolutionary has had a huge impact on traditional teaching ideas and teaching methods and has brought huge opportunities for sports. In view of the limitations of the traditional physical education model, combined with the theory of stimulus response, he analyzed simulation in the field of physical education and innovated the physical education model. It provides a reference for the better of sports. His research-assisted teaching can help students make better use of simulation to strengthen physical learning theory and physical practice but lacks a teaching model that can provide an effective reference for the innovation of physical education [2]. In interior design, the computer’s drawing function can greatly improve the design efficiency, with the advantages of accuracy, repeatability, and modification. Sai L analyzed the architectural design and interior decoration based on virtual reality and computer simulation. In his research, the computer’s drawing function is an important tool for the computer-aided design of interior designers, but the research process lacks data [3]. Kajiwara T believes that composite is very important for the production of high-functional or high-quality materials and products. He has researched composite technologies in polymer and glass processing. For the multilayer process of polymer films, he has developed a multilayer flow simulation for viscoelastic fluids and discussed the instability and encapsulation phenomena at the interface from case studies considering mold configuration, rheological properties, and so on. Although the multilayer film phenomenon in his research can also be understood from simulation, the research process still has no data induction [4].This study uses complex computer simulation to design the background of the simulated football field, divide the area according to the size ratio of the actual football field, and then use drawing software to draw the football and player controls. The construction of the knowledge base of this paper is mainly combined with the functional modules of rapid formation and response tactics. In the fast formation function, the required formation can be quickly given through football experience and knowledge rules. In the applied tactics function, for the responsibilities of forwards, midfielders, defenders, and other roles, the tactics implemented are given, including partially coordinated offensive and defensive tactics, personal offensive and defensive tactics, and set-ball tactics.


## 2. Campus Football

### 2.1. Complexity Computer Simulation

With the rapid of virtual simulation, complexity computer simulation has been widely used in all walks of life [5, 6]. Complexity computer simulation involves computer graphics, multimedia, artificial intelligence, human-machine interface, and other fields. By establishing a simulation environment, using information that the human body can feel, such as three-dimensional images and sounds, constructs a virtual world that does not exist [7].(1)FRq=M2qQ∗W.The frame rate of change is a physical quantity that describes the speed of frame movement [8, 9].(2)Tk=1p×q×omax∑t=1p∑j=1qEm,n.Here,Tk represents the frame change rate of the Kth image frame [10]. Therefore, try not to use a single peak as the main color feature of the venue [1, 11].(3)mean=∑i=imini=imaxhisti×i∑i=imini=imaxhisti.Here,histi represents color statistics [12].(4)Mc=exp1−Ncα.Here,Mc is the lens conversion rate and c is the lens index value. The specific definition of frame motion intensity is as follows:(5)Mc=1nc×Wc∑j=1NcWcj,where Mc represents the lens c movement intensity of the first lens [13, 14].(6)Yk|k−1=AYk|k−1+BUk.Calculate the optimal estimate from the observed valueYk to modify the predicted value [15]:(7)Yk|k−1=Yk|k−1+KkZk−HYk|k−1.Here,H represents the parameters of the observation [16, 17].(8)Qt+1=∑j=1nWijt+1Xjt+θt−1.Here,Wij is the weight coefficient of neuron connection [4].


### 2.2. Overall Play of Campus Football

The Women’s Football World Cup is a big stage for women’s football. Through this stage, each team has shown its style to the world and also invisibly interprets the trend of women’s football for us [18, 19]. Japanese women’s football started late, starting in the late 1990s, but it has been able to leap to the forefront of the world and even win the world championship in just over ten years of hard work, and its rise has reached an astonishing speed. The strong teams of women’s football in the world today are undoubtedly not known for their body and strength, and the Japanese women’s football is restricted by the congenital conditions of not outstanding physical conditions, with its outstanding foot and rich and changeable tactical cooperation, and became the new genre of the world women’s football. The rise of Women's football. has laid a certain foundation [20]. Controlling the ball in the midfield requires all players on the field to actively pass individuals and teams in all positions. Based on high accuracy, high density, and low turnover, the ball is controlled by the midfield and the ball. Stay in the opponent’s halftime for more time, give the opponent a strong sense of oppression, and gradually move forward for the purpose of scoring the final shot or forming a shot to gain control and initiative of the game [21, 22]. The division of the football field is shown in Figure 1.Figure 1
Regional division of football pitches (http://alturl.com/6govf).The motion attitude determination optimization algorithm has faster convergence speed and better optimization effect, which is very suitable for large-scale data or large-scale model problems [23].(9)Nt=β1mt−1+1−β1gt,(10)Vt=α1vt−1+1−α1gt2,(11)ηt+1=θ−μv+εm.Here,mt and vt calculate the first and second moments of the gradient [24, 25].(12)Mn=1−exp∑i−kmaxtiexp−ERT.Among them,R is the input data.(13)Pi=MNodei×CACrCNodep+NAC×1−CACrCNodepQ.Here,CACr represents the resource service capability provided [26].(14)Tt=Tt1+Tt−11+⋯+Tt−N+11N=Tt2+Tt1−Tt−N1N.


## 2.1. Complexity Computer Simulation

With the rapid of virtual simulation, complexity computer simulation has been widely used in all walks of life [5, 6]. Complexity computer simulation involves computer graphics, multimedia, artificial intelligence, human-machine interface, and other fields. By establishing a simulation environment, using information that the human body can feel, such as three-dimensional images and sounds, constructs a virtual world that does not exist [7].(1)FRq=M2qQ∗W.The frame rate of change is a physical quantity that describes the speed of frame movement [8, 9].(2)Tk=1p×q×omax∑t=1p∑j=1qEm,n.Here,Tk represents the frame change rate of the Kth image frame [10]. Therefore, try not to use a single peak as the main color feature of the venue [1, 11].(3)mean=∑i=imini=imaxhisti×i∑i=imini=imaxhisti.Here,histi represents color statistics [12].(4)Mc=exp1−Ncα.Here,Mc is the lens conversion rate and c is the lens index value. The specific definition of frame motion intensity is as follows:(5)Mc=1nc×Wc∑j=1NcWcj,where Mc represents the lens c movement intensity of the first lens [13, 14].(6)Yk|k−1=AYk|k−1+BUk.Calculate the optimal estimate from the observed valueYk to modify the predicted value [15]:(7)Yk|k−1=Yk|k−1+KkZk−HYk|k−1.Here,H represents the parameters of the observation [16, 17].(8)Qt+1=∑j=1nWijt+1Xjt+θt−1.Here,Wij is the weight coefficient of neuron connection [4].


## 2.2. Overall Play of Campus Football

The Women’s Football World Cup is a big stage for women’s football. Through this stage, each team has shown its style to the world and also invisibly interprets the trend of women’s football for us [18, 19]. Japanese women’s football started late, starting in the late 1990s, but it has been able to leap to the forefront of the world and even win the world championship in just over ten years of hard work, and its rise has reached an astonishing speed. The strong teams of women’s football in the world today are undoubtedly not known for their body and strength, and the Japanese women’s football is restricted by the congenital conditions of not outstanding physical conditions, with its outstanding foot and rich and changeable tactical cooperation, and became the new genre of the world women’s football. The rise of Women's football. has laid a certain foundation [20]. Controlling the ball in the midfield requires all players on the field to actively pass individuals and teams in all positions. Based on high accuracy, high density, and low turnover, the ball is controlled by the midfield and the ball. Stay in the opponent’s halftime for more time, give the opponent a strong sense of oppression, and gradually move forward for the purpose of scoring the final shot or forming a shot to gain control and initiative of the game [21, 22]. The division of the football field is shown in Figure 1.Figure 1
Regional division of football pitches (http://alturl.com/6govf).The motion attitude determination optimization algorithm has faster convergence speed and better optimization effect, which is very suitable for large-scale data or large-scale model problems [23].(9)Nt=β1mt−1+1−β1gt,(10)Vt=α1vt−1+1−α1gt2,(11)ηt+1=θ−μv+εm.Here,mt and vt calculate the first and second moments of the gradient [24, 25].(12)Mn=1−exp∑i−kmaxtiexp−ERT.Among them,R is the input data.(13)Pi=MNodei×CACrCNodep+NAC×1−CACrCNodepQ.Here,CACr represents the resource service capability provided [26].(14)Tt=Tt1+Tt−11+⋯+Tt−N+11N=Tt2+Tt1−Tt−N1N.


## 3. Overall Play Experiment of Campus Football

### 3.1. Operation of the Football Tactics Simulation of “Integral Play”

The “holistic play” football tactics simulation developed in this paper runs on the main controller installed with windows operating, it is connected to the server, the server is equipped with a database and knowledge base, the main controller and keyboard input equipment, and mouse input equipment, it connects an external video frequency divider and separates one to connect to the main display terminal, such as projection equipment and LCD screen, and other interfaces can be connected to display devices used for touch operation, such as LCD TVs and tablet computers. The main controller also needs to be connected to a multitouch device, the multitouch device is placed on the display device for touch operation, and then the multitouch of the “holistic play” football tactics simulation can be realized.


### 3.2. Computer Simulation Module

Tactical design and rehearsal module: by moving the football and player flash movie editing components, the football tactical formation can be designed. By drawing lines, the motion trajectory of football and athletes can be recorded in real time. When entering the line color selection module, users can select the color according to their needs, select the color, and then move the football and athlete flash movie clip components, and their motion trajectory will be recorded in real time. If you want to return to the initial state again, you need to select the current color again; then, the software is in a state where no color has been selected. At this time, moving the football and the player flash movie clip components will not leave a motion track, so that it alternately can achieve the right design of football tactics.Quick formation module: this functional module establishes a related link with the knowledge base. When you click the quick formation button, a list will pop up. You can also enter formation requirements by searching, and the knowledge base will give the corresponding formation through reasoning. After the user selects one of the formations, he will call the XML document of the relevant formation and update the coordinates of the components on the field according to the coordinate information of the flash movie clip component in the document, thereby forming a quick call of the formation. This module can also import new formations through the import formation function.Export tactical map module: after the tactical design process, you can save the currently formed football tactics in image format. After clicking the export tactics button, a dialog box will pop up. Name the current tactical map and save it as a jpg image format. Click the OK button. Later, the picture will be saved to the designated location according to the user’s needs, so that the user can browse or print again.Tactical management module: it can manage and maintain formations, tactical diagrams, tactics, teaching courseware, tactical text data, and video data. The tactics can be created or imported, edited and modified, classified and displayed, organized and stored, retrieved and inquired, dispatched, and managed.Recording and playback module: in traditional video recording, the entire screen or part of the content is usually recorded and saved as a corresponding video file. The video files recorded in this way have defects such as large volume and difficult to modify. This paper only records the interactive information generated during football tactics design and rehearsal and writes it into a formatted XML file. During playback, it will load the corresponding XML file, analyze the loaded data, and automatically control the movement of football and players on the field to form a tactical playback. During playback, the user first needs to open, then turn on the playback function, and select the file to be played back. They will interact with the database according to the user’s selection, download the corresponding XML file from the server, read the information in the XML file, and parse it. The information is taken. Based on this information, they will automatically trigger corresponding events to control the movement of football and players and reproduce the user’s football tactical design and rehearsal process.Responding tactics module: based on digital tactical representation, simple tactical analysis is carried out for unexpected situations in training or competition and the generation of response tactics based on experience data, which can provide coaches with a tactical choice in emergencies on the spot. Since in flash, each player is instantiated with a MovieClip (movie clip), the MovieClip object has a timeline, and when no special settings are made, it will be played at a speed of 24 frames per second. Therefore, you can add an ENTER_FRAME event for each object, that is, a play event, which is dispatched when the playhead enters a new frame.


### 3.3. Football Match Venue

Complexity computer simulation is used to design the background of the simulated football field, and the area is divided according to the size ratio of the actual football field. Then, use drawing software to draw the football and player controls, generate a picture in png format, then import the picture into the flash control library to generate flash components, define it as a movie clip type, and then instantiate each component for convenience write code for it. In the production process of the components, it is necessary to perform the operation of breaking up the components, that is, to split the components into basic vector elements. This can not only achieve software slimming and reduce the size of the but also make the run smooth, because of the computational efficiency of vector components. The calculation efficiency is faster than the bitmap component.


### 3.4. Overall Design of Knowledge Base

The construction of the knowledge base of this paper is mainly combined with the functional modules of rapid formation and response tactics. In the fast formation function, the required formation can be quickly given through football experience and knowledge rules. In the applied tactics function, for the responsibilities of forwards, midfielders, defenders, and other roles, the tactics implemented are given, including partially coordinated offensive and defensive tactics, personal offensive and defensive tactics, and set-ball tactics.When users apply the fast formation and response tactics functions of the football tactical rehearsal, they will provide users with an interface to the knowledge base and interact with the knowledge base. The construction of the knowledge base is first to acquire knowledge through knowledge sources and then to express knowledge according to corresponding rules. When a user makes a request, the knowledge base will perform fuzzy inferences based on the knowledge rules, find the corresponding knowledge rules, then trigger the rules, feed back to the interface, and feed back to the user. This is the overall design of the knowledge base in this paper.


### 3.5. Recording and Playback Functions

#### 3.5.1. XML Representation of Player and Football Trajectory

XML (Extensible Markup Language) is a structured markup language that can be used to mark data and define data types. The “holistic play” football tactics studied in this paper use XML files as recording and playback data, which not only greatly reduce the amount of file data but also make the operation of XML files intuitive and simple. The XML representation of players and football trajectories needs to be stored in a self-defined storage format. When the “holistic play” football tactics simulation is launched, the background information of football, players and venues, and other flash movie clip components has been determined. We need to record the location information of the flash movie clip component that has changed.


#### 3.5.2. Realize the Simulation Recording of Players and Football Trajectory by Writing XML

XML is also the core adopted. This can not only realize the recording and playback of players and football trajectories but also be applied to the function of rapid formation. In the “holistic play” football tactics simulation, users mainly interact through multitouch. Multitouch is mainly used to control the movement of football and players and to change the position information of components, so the recording process can be transformed into a record of the positions and events of football and players. Users use multitouch devices to operate football and player models, and these operations will inevitably cause related events to be triggered. The recording process should study how to effectively monitor multitouch events. Users can also modify the places that are not satisfied with the tactics. This paper studies how to use the combination of ActionScript 3.0 and Java to realize the recording function. The ActionScript 3.0 client is responsible for recording information such as multitouch events and keyboard events input by the user and the frame number generated by the program running and then sends the recorded information to the Java server through the socket. The Java server is responsible for receiving the recorded information and writing the data in the XML file. The server is written in Java, and the server will listen to port 5000 by default, acting as a digital shadow puppet.After the client of the performance sends the data, the Java server will reparse the sent string. If it is a disconnect command, it disconnects and ends the service to the client. If the client sends recorded data, it will determine whether the file exists, and if it does not exist, create an XML file first. If it exists, use JDOM-related API to write the data in the XML file.In this way, the XML standardized storage format of the digital representation of football tactics is used in football tactics design and rehearsal recording and playback functions, which makes the design of football tactics more convenient and the rehearsal process of tactics is more intuitive, which is convenient for players to understand the tactics and at the same time. The tactics simulation is shown in Figure2.Figure 2
Tactical simulation (http://alturl.com/5emf2).


### 3.6. Improve Student Tactics

The coach uses the “holistic play” football tactics simulation to visually demonstrate the movement route, guide the players in each position to perceive the game scene by observing the movement route, analyze and judge the tactical coordination of their respective positions, and select the appropriate time to make action choices. When consolidating tactical thoughts, some virtual reality scenes can also be used to guide players to make analysis and judgments, so as to cultivate the ability of analysis and judgment of players.


## 3.1. Operation of the Football Tactics Simulation of “Integral Play”

The “holistic play” football tactics simulation developed in this paper runs on the main controller installed with windows operating, it is connected to the server, the server is equipped with a database and knowledge base, the main controller and keyboard input equipment, and mouse input equipment, it connects an external video frequency divider and separates one to connect to the main display terminal, such as projection equipment and LCD screen, and other interfaces can be connected to display devices used for touch operation, such as LCD TVs and tablet computers. The main controller also needs to be connected to a multitouch device, the multitouch device is placed on the display device for touch operation, and then the multitouch of the “holistic play” football tactics simulation can be realized.


## 3.2. Computer Simulation Module

Tactical design and rehearsal module: by moving the football and player flash movie editing components, the football tactical formation can be designed. By drawing lines, the motion trajectory of football and athletes can be recorded in real time. When entering the line color selection module, users can select the color according to their needs, select the color, and then move the football and athlete flash movie clip components, and their motion trajectory will be recorded in real time. If you want to return to the initial state again, you need to select the current color again; then, the software is in a state where no color has been selected. At this time, moving the football and the player flash movie clip components will not leave a motion track, so that it alternately can achieve the right design of football tactics.Quick formation module: this functional module establishes a related link with the knowledge base. When you click the quick formation button, a list will pop up. You can also enter formation requirements by searching, and the knowledge base will give the corresponding formation through reasoning. After the user selects one of the formations, he will call the XML document of the relevant formation and update the coordinates of the components on the field according to the coordinate information of the flash movie clip component in the document, thereby forming a quick call of the formation. This module can also import new formations through the import formation function.Export tactical map module: after the tactical design process, you can save the currently formed football tactics in image format. After clicking the export tactics button, a dialog box will pop up. Name the current tactical map and save it as a jpg image format. Click the OK button. Later, the picture will be saved to the designated location according to the user’s needs, so that the user can browse or print again.Tactical management module: it can manage and maintain formations, tactical diagrams, tactics, teaching courseware, tactical text data, and video data. The tactics can be created or imported, edited and modified, classified and displayed, organized and stored, retrieved and inquired, dispatched, and managed.Recording and playback module: in traditional video recording, the entire screen or part of the content is usually recorded and saved as a corresponding video file. The video files recorded in this way have defects such as large volume and difficult to modify. This paper only records the interactive information generated during football tactics design and rehearsal and writes it into a formatted XML file. During playback, it will load the corresponding XML file, analyze the loaded data, and automatically control the movement of football and players on the field to form a tactical playback. During playback, the user first needs to open, then turn on the playback function, and select the file to be played back. They will interact with the database according to the user’s selection, download the corresponding XML file from the server, read the information in the XML file, and parse it. The information is taken. Based on this information, they will automatically trigger corresponding events to control the movement of football and players and reproduce the user’s football tactical design and rehearsal process.Responding tactics module: based on digital tactical representation, simple tactical analysis is carried out for unexpected situations in training or competition and the generation of response tactics based on experience data, which can provide coaches with a tactical choice in emergencies on the spot. Since in flash, each player is instantiated with a MovieClip (movie clip), the MovieClip object has a timeline, and when no special settings are made, it will be played at a speed of 24 frames per second. Therefore, you can add an ENTER_FRAME event for each object, that is, a play event, which is dispatched when the playhead enters a new frame.


## 3.3. Football Match Venue

Complexity computer simulation is used to design the background of the simulated football field, and the area is divided according to the size ratio of the actual football field. Then, use drawing software to draw the football and player controls, generate a picture in png format, then import the picture into the flash control library to generate flash components, define it as a movie clip type, and then instantiate each component for convenience write code for it. In the production process of the components, it is necessary to perform the operation of breaking up the components, that is, to split the components into basic vector elements. This can not only achieve software slimming and reduce the size of the but also make the run smooth, because of the computational efficiency of vector components. The calculation efficiency is faster than the bitmap component.


## 3.4. Overall Design of Knowledge Base

The construction of the knowledge base of this paper is mainly combined with the functional modules of rapid formation and response tactics. In the fast formation function, the required formation can be quickly given through football experience and knowledge rules. In the applied tactics function, for the responsibilities of forwards, midfielders, defenders, and other roles, the tactics implemented are given, including partially coordinated offensive and defensive tactics, personal offensive and defensive tactics, and set-ball tactics.When users apply the fast formation and response tactics functions of the football tactical rehearsal, they will provide users with an interface to the knowledge base and interact with the knowledge base. The construction of the knowledge base is first to acquire knowledge through knowledge sources and then to express knowledge according to corresponding rules. When a user makes a request, the knowledge base will perform fuzzy inferences based on the knowledge rules, find the corresponding knowledge rules, then trigger the rules, feed back to the interface, and feed back to the user. This is the overall design of the knowledge base in this paper.


## 3.5. Recording and Playback Functions

### 3.5.1. XML Representation of Player and Football Trajectory

XML (Extensible Markup Language) is a structured markup language that can be used to mark data and define data types. The “holistic play” football tactics studied in this paper use XML files as recording and playback data, which not only greatly reduce the amount of file data but also make the operation of XML files intuitive and simple. The XML representation of players and football trajectories needs to be stored in a self-defined storage format. When the “holistic play” football tactics simulation is launched, the background information of football, players and venues, and other flash movie clip components has been determined. We need to record the location information of the flash movie clip component that has changed.


### 3.5.2. Realize the Simulation Recording of Players and Football Trajectory by Writing XML

XML is also the core adopted. This can not only realize the recording and playback of players and football trajectories but also be applied to the function of rapid formation. In the “holistic play” football tactics simulation, users mainly interact through multitouch. Multitouch is mainly used to control the movement of football and players and to change the position information of components, so the recording process can be transformed into a record of the positions and events of football and players. Users use multitouch devices to operate football and player models, and these operations will inevitably cause related events to be triggered. The recording process should study how to effectively monitor multitouch events. Users can also modify the places that are not satisfied with the tactics. This paper studies how to use the combination of ActionScript 3.0 and Java to realize the recording function. The ActionScript 3.0 client is responsible for recording information such as multitouch events and keyboard events input by the user and the frame number generated by the program running and then sends the recorded information to the Java server through the socket. The Java server is responsible for receiving the recorded information and writing the data in the XML file. The server is written in Java, and the server will listen to port 5000 by default, acting as a digital shadow puppet.After the client of the performance sends the data, the Java server will reparse the sent string. If it is a disconnect command, it disconnects and ends the service to the client. If the client sends recorded data, it will determine whether the file exists, and if it does not exist, create an XML file first. If it exists, use JDOM-related API to write the data in the XML file.In this way, the XML standardized storage format of the digital representation of football tactics is used in football tactics design and rehearsal recording and playback functions, which makes the design of football tactics more convenient and the rehearsal process of tactics is more intuitive, which is convenient for players to understand the tactics and at the same time. The tactics simulation is shown in Figure2.Figure 2
Tactical simulation (http://alturl.com/5emf2).


## 3.5.1. XML Representation of Player and Football Trajectory

XML (Extensible Markup Language) is a structured markup language that can be used to mark data and define data types. The “holistic play” football tactics studied in this paper use XML files as recording and playback data, which not only greatly reduce the amount of file data but also make the operation of XML files intuitive and simple. The XML representation of players and football trajectories needs to be stored in a self-defined storage format. When the “holistic play” football tactics simulation is launched, the background information of football, players and venues, and other flash movie clip components has been determined. We need to record the location information of the flash movie clip component that has changed.


## 3.5.2. Realize the Simulation Recording of Players and Football Trajectory by Writing XML

XML is also the core adopted. This can not only realize the recording and playback of players and football trajectories but also be applied to the function of rapid formation. In the “holistic play” football tactics simulation, users mainly interact through multitouch. Multitouch is mainly used to control the movement of football and players and to change the position information of components, so the recording process can be transformed into a record of the positions and events of football and players. Users use multitouch devices to operate football and player models, and these operations will inevitably cause related events to be triggered. The recording process should study how to effectively monitor multitouch events. Users can also modify the places that are not satisfied with the tactics. This paper studies how to use the combination of ActionScript 3.0 and Java to realize the recording function. The ActionScript 3.0 client is responsible for recording information such as multitouch events and keyboard events input by the user and the frame number generated by the program running and then sends the recorded information to the Java server through the socket. The Java server is responsible for receiving the recorded information and writing the data in the XML file. The server is written in Java, and the server will listen to port 5000 by default, acting as a digital shadow puppet.After the client of the performance sends the data, the Java server will reparse the sent string. If it is a disconnect command, it disconnects and ends the service to the client. If the client sends recorded data, it will determine whether the file exists, and if it does not exist, create an XML file first. If it exists, use JDOM-related API to write the data in the XML file.In this way, the XML standardized storage format of the digital representation of football tactics is used in football tactics design and rehearsal recording and playback functions, which makes the design of football tactics more convenient and the rehearsal process of tactics is more intuitive, which is convenient for players to understand the tactics and at the same time. The tactics simulation is shown in Figure2.Figure 2
Tactical simulation (http://alturl.com/5emf2).


## 3.6. Improve Student Tactics

The coach uses the “holistic play” football tactics simulation to visually demonstrate the movement route, guide the players in each position to perceive the game scene by observing the movement route, analyze and judge the tactical coordination of their respective positions, and select the appropriate time to make action choices. When consolidating tactical thoughts, some virtual reality scenes can also be used to guide players to make analysis and judgments, so as to cultivate the ability of analysis and judgment of players.


## 4. Results and Discussion

### 4.1. “Integral Play” Tactics Simulation Analysis

The coefficients between structural variables indicate the degree to which changes in one variable cause changes in other variables. There are three latent variables in the structural equation model that features the use of offensive tactics of the free kick and corner kick in the frontcourt, which are the organization launch factor, the cross move factor, and the final shot factor. In the offensive structure model of frontcourt free kick and corner kick, the normalized path coefficients of the organization launch factor and the cross run factor are 0.134, and the normalized path coefficients of the cross run factor and the final shot factor are 0.56. This shows that, in the offensive structure model of free kicks and corner kicks in the frontcourt, the organization launch factor has little relationship with the passing running factor, while the passing running factor has a positive correlation with the final finishing shot factor. It can be seen from Table1 that only the number of organizations has a direct effect on the passing factor, but the influence is not significant. Combining the actual situation of the game, the computer simulation of the team’s number of offensives in the front corner and free kick attack is concentrated in the number of attackers in the number of 1 to 2 people, accounting for 51.5% and 32.3%, respectively, and the number of shooting points is concentrated in 6 to 7. People accounted for 41.4% and 36.4%, respectively, indicating that the number of organizers is relatively stable when attacking corner kicks and free kicks, but the distribution of the number of organizers has no significant effect on the final passing situation and the form of running. In the front corner and free kick attack, the passing factor has the greatest influence on the final shot factor, while the influence of the number of players on the final shot is an indirect effect and has a small impact, indicating that the front corner and free kick are effective when attacking. Crossing and reasonable movement are the most critical factors for effective shooting. The variables in the offensive tactics of the free kick and corner kick are shown in Table 1.Table 1
Variables in the offensive tactics of free kicks and corner kicks.
EffectOrganization population factorCrossing factorTotal effectDirect effectIndirect effectTotal effectDirect effectCrossing factor0.1340.134———Finishing factor0.075—0.0750.5600.560The relationship between the ending shot factor and its observed variables is shown in Table2. The path coefficients of the shooting position and the technical element of the shooting are 0.839 and 0.728, respectively, which are significantly higher than the path coefficient of the shooting area. This shows that the positions and methods used in the front corner kick and free kick attack are more observational than the area when shooting. It can be seen from Table 2 that the front corner, midpoint, back point, and peripheral shots of the front corner and free kick attack were 25, 29, 26, and 12 shots, respectively, which did not have significant observation characteristics and the shooting position. The sum action element is mainly reflected in the direct shot from the head. It shows that direct headshots in front corner kicks and free kicks are the most effective indicator of the team’s ability to finish shooting. The rapid layout of the football drill process is shown in Figure 3.Table 2
The relationship between the final shot factor and its observed variables.
Shooting areaShot positionAreaFrequencyPercentage (%)LocationFrequencyPercentage (%)Before the point2525.3Head7575.8Midpoint2929.3Feet2121.2Back point2626.3Others33.0Figure 3
Fast layout during football drill (http://alturl.com/ymozb).The relationship between the passing factor and its observed variables is shown in Table3. The analysis of the passing factor and its observed variables is shown in Figure 4. The precision of the passing and running position and the path coefficient of the passing running factor are 0.606 and 0.591, respectively, which are slightly higher than the path coefficient of the height of the pass and the confrontation intensity, indicating that the pass is in the front corner and free kick attack. In the running phase, the completion of the cross and the fine running is the prerequisites for creating shot opportunities.Table 3
The relationship between the passing factors and their observed variables.
Number of peopleCrossing factorNumber of shotsFrequencyPercentage (%)FrequencyPercentage (%)15151.50023232.31131111.111444115111515.26004141.47003636.48003390011Figure 4
Analysis of the passing factors and their observed variables.The one-foot pass game is shown in Figure5. One kick pass is the fastest method of passing the ball. Its advantage is that players should always pay attention to the situation on the field and make a reasonable decision in advance before passing the ball. Fast can always easily get more space and the best angle, so that there will be more time to observe the situation on the field; this is a virtuous circle. Therefore, if you pass a series of fast passes, the changes in the offensive point will increase. The faster the ball moves, the more the defender’s reaction will not keep up with the rhythm, so you can create more space for the offense. The one-foot-passing technique is being valued by teams from all over the world, and teams from all countries are also using it in the game as much as possible, in order to win more time and space advantages in the game.Figure 5
One-foot pass play (http://alturl.com/pjng6).Table4 shows the statistical comparison between team A and team B. In a football game, players of a team with good scores touch the ball more each time they get the ball; a team with a good score has a long time to control the ball, and the distance to control the ball is also long. In a football game, the ability to control the game is reflected by the active interspersed running of the team’s players and repeated accurate passes without interruption. The number of 4–8 consecutive passes of team A is 35 times, and the number of team B is 21 times. Team A occupies an absolute advantage. Team A’s 9–16 consecutive passes are 14 times, while team B has only one pass. The gap between the two teams is even greater. From the data in the above table, it can be easily concluded that the players of team A have a very tacit understanding, they are very skilled in their kicks, and their footwork is more reasonable. The tactics are more delicate. On the other hand, team B is mainly based on individuals. The ball-handling counterattack is the main breakthrough, which is more monotonous than team A.Table 4
Comparison of game statistics between team A and team B.
Team ATeam B4 or more consecutive passesGrand total4 or more consecutive passesGrand total4174851455756386751058211392Table5 shows the statistical comparison between team A and team C. Team A has 47 consecutive passes in 4–10 times, while team C has 25 consecutive passes in 4–10 times. The gap between the two teams is still not small. The number of consecutive passes of team A from 11–21 is 17 times, while the most consecutive pass of team B is only 13 passes, and the number of consecutive passes is only 4 times in double digits. It shows that the pressure of team A on their opponents is too great, and the sense of oppression is too strong. Team C cannot organize its own offense at all and can only shoot blindly.Table 5
Comparison of game statistics between team A and team C.
Team ATeam C4 or more consecutive passesGrand total4 or more consecutive passesGrand total46565775648410493115102124126The one-time pass data comparison between team A and team B is shown in Figure6 (the upper data in the figure are team A, the lower data are team B, and the data in parentheses are their respective turnovers). The scoring data of team A and team B are shown in Table 6. From the comparison of the one-foot pass data corresponding to this game, it can be observed. The data show that, in each area of the defender, the number of one-foot passes of team A in the middle of the backcourt is the same as the number of one-foot passes of team B, and the two teams have fewer times in this area, indicating that the two teams rarely use a pass in their respective areas that pose a great threat to the goal so as to ensure that they will not lose the ball or hit the goal due to mistakes and create a threat. The key area of a pass is in the midfield. Although the two teams have very little difference in the number of passes in the area of the left and right sides of the midfield, in the midfield area, A, the number of passes by the team is far ahead of team B. Team A has 55 passes in midfield and 7 turnovers, while team B has 23 passes and 8 turnovers in midfield. By comparing the number of passes and turnovers of the two teams, it can be seen that team A has a clear advantage in the midfield, which shows that team A has very good control over the situation and rhythm of the midfield. Team A uses fast passing and then uses the pass to constantly change the direction of the team’s offense, so that team B is constantly mobilized to find breakthrough points for the opponent’s defense. In the frontcourt, the number of passes of team A was 8 times and the number of turnovers was 3 times, while the number of turnovers of team B was 0. This shows that, in terms of offense, team A’s method of organizing offense is very strict and is constantly changing. Find the best time to attack in his passing. The B team’s offensive rhythm is slow, it is based on personal ability, and there is almost no threat caused by passing.Figure 6
One-time pass data comparison between team A and team B.Table 6
Scores of team A and team B.
Team nameShotShoot rightShoot rightGoalTeam A14429%2Team A17847%3Team A9544%1Team A14642%0Team A14750%4Team A15747%2Team B27725%2


## 4.1. “Integral Play” Tactics Simulation Analysis

The coefficients between structural variables indicate the degree to which changes in one variable cause changes in other variables. There are three latent variables in the structural equation model that features the use of offensive tactics of the free kick and corner kick in the frontcourt, which are the organization launch factor, the cross move factor, and the final shot factor. In the offensive structure model of frontcourt free kick and corner kick, the normalized path coefficients of the organization launch factor and the cross run factor are 0.134, and the normalized path coefficients of the cross run factor and the final shot factor are 0.56. This shows that, in the offensive structure model of free kicks and corner kicks in the frontcourt, the organization launch factor has little relationship with the passing running factor, while the passing running factor has a positive correlation with the final finishing shot factor. It can be seen from Table1 that only the number of organizations has a direct effect on the passing factor, but the influence is not significant. Combining the actual situation of the game, the computer simulation of the team’s number of offensives in the front corner and free kick attack is concentrated in the number of attackers in the number of 1 to 2 people, accounting for 51.5% and 32.3%, respectively, and the number of shooting points is concentrated in 6 to 7. People accounted for 41.4% and 36.4%, respectively, indicating that the number of organizers is relatively stable when attacking corner kicks and free kicks, but the distribution of the number of organizers has no significant effect on the final passing situation and the form of running. In the front corner and free kick attack, the passing factor has the greatest influence on the final shot factor, while the influence of the number of players on the final shot is an indirect effect and has a small impact, indicating that the front corner and free kick are effective when attacking. Crossing and reasonable movement are the most critical factors for effective shooting. The variables in the offensive tactics of the free kick and corner kick are shown in Table 1.Table 1
Variables in the offensive tactics of free kicks and corner kicks.
EffectOrganization population factorCrossing factorTotal effectDirect effectIndirect effectTotal effectDirect effectCrossing factor0.1340.134———Finishing factor0.075—0.0750.5600.560The relationship between the ending shot factor and its observed variables is shown in Table2. The path coefficients of the shooting position and the technical element of the shooting are 0.839 and 0.728, respectively, which are significantly higher than the path coefficient of the shooting area. This shows that the positions and methods used in the front corner kick and free kick attack are more observational than the area when shooting. It can be seen from Table 2 that the front corner, midpoint, back point, and peripheral shots of the front corner and free kick attack were 25, 29, 26, and 12 shots, respectively, which did not have significant observation characteristics and the shooting position. The sum action element is mainly reflected in the direct shot from the head. It shows that direct headshots in front corner kicks and free kicks are the most effective indicator of the team’s ability to finish shooting. The rapid layout of the football drill process is shown in Figure 3.Table 2
The relationship between the final shot factor and its observed variables.
Shooting areaShot positionAreaFrequencyPercentage (%)LocationFrequencyPercentage (%)Before the point2525.3Head7575.8Midpoint2929.3Feet2121.2Back point2626.3Others33.0Figure 3
Fast layout during football drill (http://alturl.com/ymozb).The relationship between the passing factor and its observed variables is shown in Table3. The analysis of the passing factor and its observed variables is shown in Figure 4. The precision of the passing and running position and the path coefficient of the passing running factor are 0.606 and 0.591, respectively, which are slightly higher than the path coefficient of the height of the pass and the confrontation intensity, indicating that the pass is in the front corner and free kick attack. In the running phase, the completion of the cross and the fine running is the prerequisites for creating shot opportunities.Table 3
The relationship between the passing factors and their observed variables.
Number of peopleCrossing factorNumber of shotsFrequencyPercentage (%)FrequencyPercentage (%)15151.50023232.31131111.111444115111515.26004141.47003636.48003390011Figure 4
Analysis of the passing factors and their observed variables.The one-foot pass game is shown in Figure5. One kick pass is the fastest method of passing the ball. Its advantage is that players should always pay attention to the situation on the field and make a reasonable decision in advance before passing the ball. Fast can always easily get more space and the best angle, so that there will be more time to observe the situation on the field; this is a virtuous circle. Therefore, if you pass a series of fast passes, the changes in the offensive point will increase. The faster the ball moves, the more the defender’s reaction will not keep up with the rhythm, so you can create more space for the offense. The one-foot-passing technique is being valued by teams from all over the world, and teams from all countries are also using it in the game as much as possible, in order to win more time and space advantages in the game.Figure 5
One-foot pass play (http://alturl.com/pjng6).Table4 shows the statistical comparison between team A and team B. In a football game, players of a team with good scores touch the ball more each time they get the ball; a team with a good score has a long time to control the ball, and the distance to control the ball is also long. In a football game, the ability to control the game is reflected by the active interspersed running of the team’s players and repeated accurate passes without interruption. The number of 4–8 consecutive passes of team A is 35 times, and the number of team B is 21 times. Team A occupies an absolute advantage. Team A’s 9–16 consecutive passes are 14 times, while team B has only one pass. The gap between the two teams is even greater. From the data in the above table, it can be easily concluded that the players of team A have a very tacit understanding, they are very skilled in their kicks, and their footwork is more reasonable. The tactics are more delicate. On the other hand, team B is mainly based on individuals. The ball-handling counterattack is the main breakthrough, which is more monotonous than team A.Table 4
Comparison of game statistics between team A and team B.
Team ATeam B4 or more consecutive passesGrand total4 or more consecutive passesGrand total4174851455756386751058211392Table5 shows the statistical comparison between team A and team C. Team A has 47 consecutive passes in 4–10 times, while team C has 25 consecutive passes in 4–10 times. The gap between the two teams is still not small. The number of consecutive passes of team A from 11–21 is 17 times, while the most consecutive pass of team B is only 13 passes, and the number of consecutive passes is only 4 times in double digits. It shows that the pressure of team A on their opponents is too great, and the sense of oppression is too strong. Team C cannot organize its own offense at all and can only shoot blindly.Table 5
Comparison of game statistics between team A and team C.
Team ATeam C4 or more consecutive passesGrand total4 or more consecutive passesGrand total46565775648410493115102124126The one-time pass data comparison between team A and team B is shown in Figure6 (the upper data in the figure are team A, the lower data are team B, and the data in parentheses are their respective turnovers). The scoring data of team A and team B are shown in Table 6. From the comparison of the one-foot pass data corresponding to this game, it can be observed. The data show that, in each area of the defender, the number of one-foot passes of team A in the middle of the backcourt is the same as the number of one-foot passes of team B, and the two teams have fewer times in this area, indicating that the two teams rarely use a pass in their respective areas that pose a great threat to the goal so as to ensure that they will not lose the ball or hit the goal due to mistakes and create a threat. The key area of a pass is in the midfield. Although the two teams have very little difference in the number of passes in the area of the left and right sides of the midfield, in the midfield area, A, the number of passes by the team is far ahead of team B. Team A has 55 passes in midfield and 7 turnovers, while team B has 23 passes and 8 turnovers in midfield. By comparing the number of passes and turnovers of the two teams, it can be seen that team A has a clear advantage in the midfield, which shows that team A has very good control over the situation and rhythm of the midfield. Team A uses fast passing and then uses the pass to constantly change the direction of the team’s offense, so that team B is constantly mobilized to find breakthrough points for the opponent’s defense. In the frontcourt, the number of passes of team A was 8 times and the number of turnovers was 3 times, while the number of turnovers of team B was 0. This shows that, in terms of offense, team A’s method of organizing offense is very strict and is constantly changing. Find the best time to attack in his passing. The B team’s offensive rhythm is slow, it is based on personal ability, and there is almost no threat caused by passing.Figure 6
One-time pass data comparison between team A and team B.Table 6
Scores of team A and team B.
Team nameShotShoot rightShoot rightGoalTeam A14429%2Team A17847%3Team A9544%1Team A14642%0Team A14750%4Team A15747%2Team B27725%2


## 5. Conclusion

This research mainly discusses complexity computer simulation in the study of the overall play of campus football. Complexity computer simulation is used to design the background of the simulated football field, and the area is divided according to the size ratio of the actual football field. Then, it uses drawing software to draw the football and player controls. The construction of the knowledge base of this paper is mainly combined with the functional modules of rapid formation and response tactics. In the fast formation function, the required formation can be quickly given through football experience and knowledge rules. In the applied tactics function, for the responsibilities of forwards, midfielders, defenders, and other roles, the tactics implemented are given, including partially coordinated offensive and defensive tactics, personal offensive and defensive tactics, and set-ball tactics. The “holistic play” football tactics studied in this paper use XML files as recording and playback data, which not only greatly reduce the amount of file data but also make the operation of XML files intuitive and simple. XML can not only realize the recording and playback of player and football track but also be used in the function of rapid formation. The coach uses the “holistic play” football tactics simulation to demonstrate the movement route through the image, guide the players in each position to perceive the game scene by observing the movement route, and analyze and judge the tactical coordination of their respective positions. This research helps to provide guidance on the overall playing tactics of football.



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*Source: 9920443-2021-04-23.xml*