多个小球碰撞用vue实现
时间: 2023-07-12 11:30:54 浏览: 109
在 Vue 中实现多个小球的碰撞,可以按照以下步骤进行:
1. 创建一个 Ball 组件,用于显示单个小球的界面。这个组件需要包含小球的位置、速度等信息,并且需要实现小球的移动和碰撞检测等功能。
```
<template>
<div :style="{ left: x + 'px', top: y + 'px' }"></div>
</template>
<script>
export default {
props: {
x: Number,
y: Number,
speedX: Number,
speedY: Number,
radius: Number,
color: String,
bounds: Object
},
data() {
return {
timerId: null
}
},
created() {
this.timerId = setInterval(this.move, 10);
},
methods: {
move() {
let x = this.x + this.speedX;
let y = this.y + this.speedY;
if (x - this.radius < this.bounds.left || x + this.radius > this.bounds.right) {
this.speedX = -this.speedX;
}
if (y - this.radius < this.bounds.top || y + this.radius > this.bounds.bottom) {
this.speedY = -this.speedY;
}
this.$emit('update:x', x);
this.$emit('update:y', y);
}
}
}
</script>
<style>
div {
position: absolute;
width: 20px;
height: 20px;
border-radius: 50%;
}
</style>
```
2. 在父组件中,创建多个 Ball 组件,并为每个组件设置不同的位置、速度等信息。同时,还需要为每个组件设置边框信息,用于碰撞检测。
```
<template>
<div ref="container" style="position: relative; width: 400px; height: 400px; border: 1px solid black;">
<Ball v-for="(ball, index) in balls" :key="index"
:x.sync="ball.x" :y.sync="ball.y"
:speedX="ball.speedX" :speedY="ball.speedY"
:radius="ball.radius" :color="ball.color"
:bounds="bounds" />
</div>
</template>
<script>
import Ball from './Ball.vue';
export default {
components: {
Ball
},
data() {
return {
balls: [
{ x: 50, y: 50, speedX: 5, speedY: 3, radius: 10, color: 'red' },
{ x: 100, y: 100, speedX: -3, speedY: 4, radius: 15, color: 'blue' },
{ x: 150, y: 150, speedX: 4, speedY: -5, radius: 20, color: 'green' }
],
bounds: {
left: 0,
top: 0,
right: 400,
bottom: 400
}
}
}
}
</script>
```
3. 在 Ball 组件中,实现碰撞检测的功能。可以在 move 方法中,遍历所有其他的 Ball 组件,检测当前小球是否与其他小球相交。如果相交了,就需要计算当前小球的新速度,并更新位置。
```
move() {
let x = this.x + this.speedX;
let y = this.y + this.speedY;
let radius = this.radius;
if (x - radius < this.bounds.left || x + radius > this.bounds.right) {
this.speedX = -this.speedX;
}
if (y - radius < this.bounds.top || y + radius > this.bounds.bottom) {
this.speedY = -this.speedY;
}
this.balls.forEach(ball => {
if (ball !== this) {
let dx = ball.x - x;
let dy = ball.y - y;
let distance = Math.sqrt(dx * dx + dy * dy);
if (distance < radius + ball.radius) {
let angle = Math.atan2(dy, dx);
let sin = Math.sin(angle);
let cos = Math.cos(angle);
// 旋转坐标系
let vx1 = this.speedX * cos + this.speedY * sin;
let vy1 = this.speedY * cos - this.speedX * sin;
let vx2 = ball.speedX * cos + ball.speedY * sin;
let vy2 = ball.speedY * cos - ball.speedX * sin;
// 碰撞后的新速度
let vx1Final = ((this.radius - ball.radius) * vx1 + (2 * ball.radius) * vx2) / (this.radius + ball.radius);
let vx2Final = ((2 * this.radius) * vx1 + (ball.radius - this.radius) * vx2) / (this.radius + ball.radius);
// 更新速度
this.speedX = vx1Final * cos - vy1 * sin;
this.speedY = vy1 * cos + vx1Final * sin;
ball.speedX = vx2Final * cos - vy2 * sin;
ball.speedY = vy2 * cos + vx2Final * sin;
// 更新位置
x += this.speedX;
y += this.speedY;
ball.x += ball.speedX;
ball.y += ball.speedY;
}
}
});
this.$emit('update:x', x);
this.$emit('update:y', y);
}
```
通过以上步骤,就可以实现多个小球的碰撞,并且在 Vue 中动态更新小球的位置和速度。