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r={x:i.y*e.z-i.z*e.y,y:i.z*e.x-i.x*e.z,z:i.x*e.y-i.y*e.x},u=X(r.x*r.x+r.y*r.y+r.z*r.z);r.x/=u,r.y/=u,r.z/=u;let f=[r.x*r.x,r.x*r.y-r.z,r.x*r.z+r.y,r.x*r.y+r.z,r.y*r.y,r.y*r.z-r.x,r.x*r.z-r.y,r.y*r.z+r.x,r.z*r.z];return{t:n,x:f[0]*e.x+f[1]*e.y+f[2]*e.z,y:f[3]*e.x+f[4]*e.y+f[5]*e.z,z:f[6]*e.x+f[7]*e.y+f[8]*e.z}}hull(n){let e=this.points,i=[],s=[],o=0;for(s[o++]=e[0],s[o++]=e[1],s[o++]=e[2],this.order===3&&(s[o++]=e[3]);e.length>1;){i=[];for(let r=0,u,f=e.length-1;r<f;r++)u=h.lerp(n,e[r],e[r+1]),s[o++]=u,i.push(u);e=i}return s}split(n,e){if(n===0&&!!e)return this.split(e).left;if(e===1)return this.split(n).right;let i=this.hull(n),s={left:this.order===2?new v([i[0],i[3],i[5]]):new v([i[0],i[4],i[7],i[9]]),right:this.order===2?new v([i[5],i[4],i[2]]):new v([i[9],i[8],i[6],i[3]]),span:i};return 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