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二话不说，上代码！

world.onPlayerJoin(({entity})=>{
    Object.assign(entity, {             
        particleLimit:300,        
        particleLifetime: 5,      
        particleRate: 300,         
        particleRateSpread: 500,  
        particleSize:[5,3,5,3,5],    
        particleColor: [
            new Box3RGBColor(10,0,0),
            new Box3RGBColor(0,10,0),
            new Box3RGBColor(0,0,10),
        ], // 设置颜色(紫色)
        particleVelocity: new Box3Vector3(0, 0, 0), 
    });
})

这个是一个给玩家的会渐变的粒子特效

大佬不喜勿喷