怎么利用pixi.js制作简单的跑酷小游戏
这篇文章主要讲解了“怎么利用pixi.js制作简单的跑酷小游戏”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“怎么利用pixi.js制作简单的跑酷小游戏”吧！
初始化项目
使用vite初始化项目
pnpm create vite my-vue-app
安装pixi.js和pixi-tweener
pixi-tweener一个做过度动画的开源库
pnpm i pixi.js pixi-tweener
主要逻辑
useParkour
此函数用于创建pixi app，将场景，障碍物，人物添加到app中
containerRef canvas的容器
gameStart 开始游戏
start 开始状态
score 分数
hp 血量
export function useParkour() {
const containerRef = ref();
const app = new Application({
width: BODY_HEIGHT,
height: BODY_WIDTH,
backgroundColor: 0xffffff,
});
const start = ref(false);
Tweener.init(app.ticker);
const container = new Container();
app.stage.addChild(container);
const player = new Player();
const { scene, runScene, stopScene } = useScene();
const { trap, runHurdle, score, hp } = useHurdle();
container.addChild(player);
container.addChild(scene);
container.addChild(trap);
container.sortChildren();
runScene();
function gameStart() {
start.value = true;
player.play();
const timer = setTimeout(() => {
runHurdle(player);
clearTimeout(timer);
}, 1000);
}
watch(hp, (value) => {
if (value === 0) {
player.stop();
stopScene();
start.value = false;
}
});
onMounted(() => {
if (containerRef.value) containerRef.value.appendChild(app.view);
});
return { containerRef, app, score, hp, gameStart, start };
}useScene
此函数用于创建天空、地面场景
加载天空、地面纹理，创建平铺精灵(TilingSprite)，这个TilingSprite类比较方便做场景的移动
创建ticker递减精灵的x坐标实现场景移动
export function useScene() {
const loader = new Loader();
const scene = new Container();
scene.height = 130;
scene.zIndex = 1;
const ticker = new Ticker();
loader
.add("footer", FooterImg)
.add("sky", SkyImg)
.load(() => {
const footer = new TilingSprite(
loader.resources.footer.texture as Texture,
BODY_HEIGHT,
130
);
footer.y = BODY_WIDTH - 130;
footer.zIndex = 2;
const sky = new TilingSprite(
loader.resources.sky.texture as Texture,
BODY_HEIGHT,
BODY_WIDTH - 80
);
sky.tileScale.y = 0.6;
sky.zIndex = 1;
sky.y = -30;
scene.addChild(footer);
scene.addChild(sky);
scene.sortChildren();
const sceneTicker = () => {
footer.tilePosition.x -= 3;
sky.tilePosition.x -= 3;
};
ticker.add(sceneTicker);
});
function runScene() {
ticker.start();
}
function stopScene() {
ticker.stop();
}
return { scene, runScene, stopScene };
}useHurdle
此函数用于创建障碍物
和创建场景其实差不多，只是障碍物是普通的精灵类(Sprite)，创建ticker移动其x
在移动时做和人物的碰撞检测，如果碰撞则减少生命值，如果没有则增加分数
export function useHurdle() {
const loader = new Loader();
const trap = new Container();
const ticker = new Ticker();
const textures: Texture[] = [];
let player: Sprite | null = null;
const hp = ref(100);
const score = ref(0);
let timer: NodeJS.Timer;
trap.zIndex = 3;
loader.add("trap", TrapImg).load((_, resources) => {
TrapTexturePosition.forEach((position) => {
const t = new Texture(
resources.trap.texture as any,
new Rectangle(...position)
);
textures.push(t);
});
});
loader.load(() => {
timer = setInterval(() => {
const index = Math.floor(Math.random() * 2) + 1;
const item = new Sprite(textures[index]);
item.width = 80;
item.height = 40;
item.x = BODY_HEIGHT;
item.y = BODY_WIDTH - 120;
trap.addChild(item);
let scoreFlag = true;
let hpFlag = true;
let isHit = false;
function itemTicker() {
item.x -= 8;
if (player && !isHit) {
isHit = hitTestRectangle(player, item);
if (hpFlag && isHit) {
hp.value -= 10;
hpFlag = false;
if (hp.value === 0) stopGame();
} else if (scoreFlag && item.x < player.x) {
score.value++;
scoreFlag = false;
}
}
if (item.x < -item.width) {
ticker.remove(itemTicker);
trap.removeChild(item);
}
}
ticker.add(itemTicker);
}, 2000);
});
function runHurdle(target: Sprite) {
player = target;
ticker.start();
}
function stopGame() {
timer && clearInterval(timer);
ticker.stop();
}
return { trap, runHurdle, score, hp };
}Player
玩家类：实现跑动、上跳、滑铲、入场的效果
通过变换Sprite的texture实现跑动效果，监听键盘事件，上键时减y，下键时更换滑铲纹理
export class Player extends Sprite {
defaultY = BODY_WIDTH - 160;
textures: Texture[] = [];
status: "run" | "jump" | "slide" = "run";
ticker = new Ticker();
constructor() {
super();
this.width = 80;
this.height = 80;
this.x = -120;
this.y = this.defaultY;
this.zIndex = 10;
this.loader();
this.watchEvent();
}
private loader() {
const loader = new Loader();
loader.add("player", PlayerImg).load((_, resources) => {
PlayerTexturePosition.forEach((position, i) => {
const texture = new Texture(
resources.player.texture as any,
new Rectangle(...position)
);
this.textures.push(texture);
});
});
}
private watchEvent() {
document.addEventListener("keydown", this.keydown);
document.addEventListener("keyup", this.keyup);
}
private clearEvent() {
document.removeEventListener("keyup", this.keydown);
document.removeEventListener("keydown", this.keyup);
}
private keydown = (e: any) => {
if (e.code === "ArrowUp") {
this.status = "jump";
if (this.y === this.defaultY) {
Tweener.add(
{ target: this, duration: 0.3, ease: Easing.easeInOutQuint },
{ y: this.y - 120 }
);
}
} else if (e.code === "ArrowDown") {
this.status = "slide";
this.texture = this.textures[10];
}
};
private keyup = () => {
this.status = "run";
};
stop() {
this.ticker.stop();
this.clearEvent();
}
play() {
this.ticker.autoStart = true;
const runTicker = () => {
this.down();
this.entrance();
if (this.status === "run") this.run();
else if (this.status === "jump") this.jump();
};
this.ticker.add(runTicker);
}
// 跑
run() {
this.texture = this.textures[Math.floor(Date.now() / 100) % 8];
}
jump() {
this.texture = this.textures[(Math.floor(Date.now() / 100) % 5) + 11];
}
// 下落
down() {
if (this.y < this.defaultY) {
this.status = "jump";
this.y += 5;
} else {
if (this.status === "jump") {
this.status = "run";
}
}
}
// 入场
entrance() {
if (this.x < 120) this.x += 5;
}
}感谢各位的阅读，以上就是“怎么利用pixi.js制作简单的跑酷小游戏”的内容了，经过本文的学习后，相信大家对怎么利用pixi.js制作简单的跑酷小游戏这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是蜗牛博客，小编将为大家推送更多相关知识点的文章，欢迎关注！
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