Web Front-end
JS Tutorial
Javascript game development: 'Three Kingdoms Cao Cao Biography' component development (1) making static characters move_javascript skills
Javascript game development: 'Three Kingdoms Cao Cao Biography' component development (1) making static characters move_javascript skills
First of all, to make a game playable, it must combine movement and movement. (Haha, everyone thought I was going to talk about composition... But in fact, what I want to talk about today is Javascript) Who doesn't know how to do static things? Because things are static when they are born (unless you use gif animation), no processing is required to achieve static status. Then I will tell you how to use Javascript to turn static pictures into dynamic pictures.
1. Picture preparation
fight01.pngfight02.pngfight03.pngfight04.png03.png02.png01.png First of all, I found some games from the classic game "Three Kingdoms" Materials from "The Biography of Cao Cao" (these are pictures of Wei general Pound). Below I'm going to use these still images to demonstrate how to turn stillness into movement. If you want to demonstrate the code, please download the above picture. The picture name corresponds to the column below.
2. Code explanation
First look at the following javascript code:var picSub = 0;
var time = 150; //Time interval (milliseconds)
var pic1 = "./01.png";
var pic2 = "./02.png";
var pic3 = "./03.png";
var pic4 = "./01.png";
var picArr = [pic1 , pic2, pic3, pic4]; //Define the array and put the variable corresponding to the position of the picture into it
setInterval(changeImg, time); //Make the picture switch according to a certain time
function changeImg()
{
var xElem = document.getElementById("ID_IMG_ROLE");
if(picSub == picArr.length-1){
picSub = 0;
}else{
picSub = 1;
} //Determine whether the array length is exceeded. If so, reset the array subscript to 0 so that it does not exceed
xElem.src = picArr[picSub]; //Switch picture
}
function changeFight()
{
pic1 = "./fight01.png";
pic2 = "./fight02. png";
pic3 = "./fight03.png";
pic4 = "./fight04.png";
picArr = [pic1, pic2, pic3, pic4];
setTimeout(reduction, 600);
}
function reduction()
{
pic1 = "./01.png";
pic2 = "./02 .png";
pic3 = "./03.png";
pic4 = "./01.png";
picArr = [pic1, pic2, pic3, pic4];
}
These codes use my favorite array. Of course, the array here is also the core of the entire program. The following is my explanation word for word:
var pic1 = "./01.png";
var pic2 = "./02.png";
var pic3 = "./03.png";
var pic4 = "./01. png";
var picArr = [pic1, pic2, pic3, pic4]; //Define the array and put the variable corresponding to the position of the picture into it
First of all, In the array, I put several variables corresponding to the positions of the pictures. for the following operations.
Look at the code again:
var xElem = document.getElementById("ID_IMG_ROLE");
if(picSub == picArr.length-1){
picSub = 0;
}else{
picSub = 1;
} //Determine whether the array length is exceeded. If so, return the array subscript to 0 so that it does not exceed
xElem.src = picArr[picSub]; // Switch pictures
Here, use the if...else statement to determine whether the array subscript exceeds the array length. If it exceeds, the subscript will be returned to 0. Then take out the image position corresponding to the subscript in the array and assign it to the src attribute in the img tag with the id attribute ID_IMG_ROLE. This will allow the picture to keep changing. So at this point just give him a place to call the function and you're done! In order to make the picture display not instantaneous, we need to give it a waiting number of seconds, and then display the next picture after waiting. So I used the following code to make function calls:
var time = 150; //Time interval (milliseconds)
setInterval(changeImg, time); //Make the picture switch at a certain time
This will make the picture move . I have also added a function here: when you press the left mouse button in the green border, the characters inside will attack. The principle is also very simple. Let's study it slowly!
For everyone’s convenience in testing, I put all the code including html below for everyone to download:
I provide the download code:
3. Demonstration effect
The first is:
Then:
Demo location:
4. Postscript
After reading this article, you must have a preliminary understanding of dynamic characters using Javascript.
In the future, everyone can use their imagination to their fullest and use this method to create beautiful dynamic games.
Of course, these are not the only mysteries of the program, and it is not easy to figure it out! I will tell you about other Javascript game development technologies in the future. Hope you all like it.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1657
14
1415
52
1309
25
1257
29
1230
24
Demystifying JavaScript: What It Does and Why It Matters
Apr 09, 2025 am 12:07 AM
JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.
The Evolution of JavaScript: Current Trends and Future Prospects
Apr 10, 2025 am 09:33 AM
The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.
JavaScript Engines: Comparing Implementations
Apr 13, 2025 am 12:05 AM
Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.
JavaScript: Exploring the Versatility of a Web Language
Apr 11, 2025 am 12:01 AM
JavaScript is the core language of modern web development and is widely used for its diversity and flexibility. 1) Front-end development: build dynamic web pages and single-page applications through DOM operations and modern frameworks (such as React, Vue.js, Angular). 2) Server-side development: Node.js uses a non-blocking I/O model to handle high concurrency and real-time applications. 3) Mobile and desktop application development: cross-platform development is realized through ReactNative and Electron to improve development efficiency.
Python vs. JavaScript: The Learning Curve and Ease of Use
Apr 16, 2025 am 12:12 AM
Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.
How to Build a Multi-Tenant SaaS Application with Next.js (Frontend Integration)
Apr 11, 2025 am 08:22 AM
This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base
From C/C to JavaScript: How It All Works
Apr 14, 2025 am 12:05 AM
The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.
How do I install JavaScript?
Apr 05, 2025 am 12:16 AM
JavaScript does not require installation because it is already built into modern browsers. You just need a text editor and a browser to get started. 1) In the browser environment, run it by embedding the HTML file through tags. 2) In the Node.js environment, after downloading and installing Node.js, run the JavaScript file through the command line.
