Web Front-end
H5 Tutorial
HTML5 lufylegend implements scrolls in the game _html5 tutorial skills
HTML5 lufylegend implements scrolls in the game _html5 tutorial skills
lufylegend is an HTML5 open source engine that implements HTML5 development using ActionScript 3.0-like syntax. It includes LSprite, LBitmapData, LBitmap, LLoader, LURLLoader, LTextField, LEvent and many other classes familiar to AS developers. It supports Google Chrome. , Firefox, Opera, IE9, IOS, Android and other popular environments. You can use lufylegend to easily use object-oriented programming, and can cooperate with Box2dWeb to create physics games. In addition, it also has built-in LTweenLite easing class and other very practical functions. Start using it now, it will allow you to enter the world of HTML5 faster. !
What is a scroll?
Students who have played RPG or side-scrolling fighting should know that after the character walks to the center of the screen, the map will move due to the large size of the map, while the character will remain relatively stationary. This is the legendary scroll. For example, the picture below is the scroll in my game "Three Kingdoms Front":
With the above introduction, everyone should understand what a scroll is. To put it bluntly, it is the effect of the camera following the protagonist. Next, we will use lufylegend.js game engine to achieve this effect.
Principle introduction
In fact, the key to achieving this effect lies in how to make the character still, when to move the map, and how to move the map. Before exploring these two issues, we first create a well-structured stage layer (and an LSprite object) for later operations. The stage structure is as follows:
- Stage layer
|
- Map layer
|
- Character layer
It can be seen that the stage layer is the parent element of the map layer and the character layer, and the character layer is in Above the map layer, after all, the character is standing on the map. We know that the coordinates of the child object are relative to the parent object, so if the parent object is moved, the child object will move accordingly. This needs to be understood first.
How to make a character still? When do you move the map? How to move the map? Maybe you would like to first use if(xxx){...} to determine whether the character's coordinates have reached the center of the screen. If so, move the map object. If not, move the character object. It would be troublesome if you do this. In fact, there is a simpler method:
When scrolling/not scrolling, our characters are moving, but if the character reaches the center of the screen and starts scrolling, our stage layer will move in the opposite direction and size to the character's speed. With the same movement, the character's displacement relative to the canvas will be offset, and it will appear to be stationary, while the map will follow the parent class and move in the opposite direction. This is similar to filming a costume movie, where two people are riding horses and talking at the same time. If a man and a horse are moving forward and the camera follows them at the same speed, the resulting picture will be that the characters are not moving, but the scenery behind the characters is moving.
Let’s look at the implementation code next.
Implementation code
The following is the code with detailed comments:
- LInit(30, 'mydemo', 700, 480, main);
- //Moving direction, null means no movement
- var direction = null;
- // Bird, stage layer, background object
- var bird, stageLayer, bg;
- //The length of each move
- var step = 5;
- function main () {
- // Resource List
- var loadList = [
- {name : 'bird', path : './bird.png'},
- {name : 'bg', path : './bg.jpg'}
- ];
- // Load resources
- LLoadManage.load(loadList, null, demoInit);
- }
- function demoInit (result) {
- //Initialize stage layer
- stageLayer = new LSprite();
- addChild(stageLayer);
- //Add background
- bg = new LBitmap(new LBitmapData(result['bg']));
- bg.y = -100;
- stageLayer.addChild(bg);
- // Join the Birds
- bird = new LBitmap(new LBitmapData(result['bird']));
- bird.x = 100;
- bird.y = 150;
- stageLayer.addChild(bird);
- //Add mouse press event
- stageLayer.addEventListener(LMouseEvent.MOUSE_DOWN, onDown);
- //Add mouse bounce event
- stageLayer.addEventListener(LMouseEvent.MOUSE_UP, onUp);
- //Add timeline event
- stageLayer.addEventListener(LEvent.ENTER_FRAME, onFrame);
- }
- function onDown (e) {
- /**Set the movement direction based on the click position*/
- if (e.offsetX > LGlobal.width / 2) {
- direction = 'right';
- } else {
- direction = 'left';
- }
- }
- 함수 onUp() {
- // 방향을 무방향으로 설정하면 움직임이 없습니다.
- 방향 = null; }
- 함수 onFrame() {
- var _step, minX, maxX;
- /**움직이는 새*/
- if ( 방향
- == '오른쪽') { _단계
- = 단계 } else if ( 방향
- == '왼쪽') { _단계
- = -단계 } else {
- 반환
- }
- bird.x = _step
- /**새의 이동 범위를 제어하세요*/
- minX
- = 0, maxX
- = bg.getWidth() -bird.getWidth() if (bird.x <
- minX) { bird.x
- = minX;
}else if (bird.x > maxX) {
- bird.x
=- maxX }
/**모바일 스테이지*/- stageLayer.x
=- LGlobal.width / 2 - Bird.x; /**스테이지 이동 범위 제어*/
minX- =
LGlobal- .width - stageLayer.getWidth(), maxX =
0- ; if (stageLayer.x < minX
) {- stageLayer.x = minX
;- }else if (stageLayer.x > maxX) {
stageLayer.x- = maxX
- } } 실행 결과:
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
1653
14
1413
52
1306
25
1251
29
1224
24
What exactly does H5 page production mean?
Apr 06, 2025 am 07:18 AM
H5 page production refers to the creation of cross-platform compatible web pages using technologies such as HTML5, CSS3 and JavaScript. Its core lies in the browser's parsing code, rendering structure, style and interactive functions. Common technologies include animation effects, responsive design, and data interaction. To avoid errors, developers should be debugged; performance optimization and best practices include image format optimization, request reduction and code specifications, etc. to improve loading speed and code quality.
How to run the h5 project
Apr 06, 2025 pm 12:21 PM
Running the H5 project requires the following steps: installing necessary tools such as web server, Node.js, development tools, etc. Build a development environment, create project folders, initialize projects, and write code. Start the development server and run the command using the command line. Preview the project in your browser and enter the development server URL. Publish projects, optimize code, deploy projects, and set up web server configuration.
How to make h5 click icon
Apr 06, 2025 pm 12:15 PM
The steps to create an H5 click icon include: preparing a square source image in the image editing software. Add interactivity in the H5 editor and set the click event. Create a hotspot that covers the entire icon. Set the action of click events, such as jumping to the page or triggering animation. Export H5 documents as HTML, CSS, and JavaScript files. Deploy the exported files to a website or other platform.
What application scenarios are suitable for H5 page production
Apr 05, 2025 pm 11:36 PM
H5 (HTML5) is suitable for lightweight applications, such as marketing campaign pages, product display pages and corporate promotion micro-websites. Its advantages lie in cross-platformity and rich interactivity, but its limitations lie in complex interactions and animations, local resource access and offline capabilities.
What Does H5 Refer To? Exploring the Context
Apr 12, 2025 am 12:03 AM
H5referstoHTML5,apivotaltechnologyinwebdevelopment.1)HTML5introducesnewelementsandAPIsforrich,dynamicwebapplications.2)Itsupportsmultimediawithoutplugins,enhancinguserexperienceacrossdevices.3)SemanticelementsimprovecontentstructureandSEO.4)H5'srespo
How to make pop-up windows with h5
Apr 06, 2025 pm 12:12 PM
H5 pop-up window creation steps: 1. Determine the triggering method (click, time, exit, scroll); 2. Design content (title, text, action button); 3. Set style (size, color, font, background); 4. Implement code (HTML, CSS, JavaScript); 5. Test and deployment.
Is h5 same as HTML5?
Apr 08, 2025 am 12:16 AM
"h5" and "HTML5" are the same in most cases, but they may have different meanings in certain specific scenarios. 1. "HTML5" is a W3C-defined standard that contains new tags and APIs. 2. "h5" is usually the abbreviation of HTML5, but in mobile development, it may refer to a framework based on HTML5. Understanding these differences helps to use these terms accurately in your project.
H5 Code: Accessibility and Semantic HTML
Apr 09, 2025 am 12:05 AM
H5 improves web page accessibility and SEO effects through semantic elements and ARIA attributes. 1. Use, etc. to organize the content structure and improve SEO. 2. ARIA attributes such as aria-label enhance accessibility, and assistive technology users can use web pages smoothly.
