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function sphere(vox, cx, cy, cz, radius){
    let xend = cx+radius
    let yend = cy+radius
    let zend = cz+radius
    for(let x=cx-radius;x<=xend;x++){
    for(let y=cy-radius;y<=yend;y++){
    for(let z=cz-radius;z<=zend;z++){
        let dx = x-cx;
        let dy = y-cy;
        let dz = z-cz;
        if(Math.round(Math.sqrt(dx*dx+dy*dy+dz*dz)) <= radius){
            voxels.setVoxel(x,y,z,vox)
        }
    }}}
}
world.onPlayerJoin(({entity})=>{
    entity.id = entity.player.name
})
world.querySelectorAll('*').forEach((e)=>{
    if(e.id != '[星球大战]TIE截击战机-1')e.collides = true
})
// sphere('air',63,24,63,12) // 调用方法。在{x:63, y:24, z:63} 位置，建造一个半径为12格的实心球体
const thePoint = world.querySelector('#[星球大战]TIE截击战机-1'); // 搜索模型名字为"出生点-1"的首个实体
(async function(){
    while(1){
        const a = world.createEntity({
            mesh:'mesh/追踪导弹.vb',
            position:thePoint.position,
            meshScale:[1/6,1/6,1/6],
            fixed:false,
            collides:true,
            gravity:true,
        })
        
        a.velocity = new Box3Vector3(Math.random()*10,0,Math.random()*10)
        a.onEntityContact(async({other})=>{
            if(other.id == '[星球大战]TIE截击战机-1') return
            other.enableDamage = true
            other.hp -= 100
            if(other.hp <= 0){
                a.destroy()
                sphere('air',other.position.x,other.position.y,other.position.z,10)
                other.hp = 0
                await sleep(4000)
                other.hp = 100
                
                world.say(other.id+'复活了')
            }
        })
        a.onVoxelContact(({
            x,y,z
        })=>{
            a.destroy()
            sphere('air',x,y,z,10)
        })
        thePoint.say('破坏家园！哈哈哈哈')
        await sleep(4000)
    }
}
)();
//配置模型：1.一个名为[星球大战]TIE截击战机-1
//文件：一个叫追踪导弹的模型
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请问如何作出导弹从空中落下并爆炸？

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