eturn this.set(0,0,0,1)}invert(){return this.conjugate()}conjugate(){return this._x*=-1,this._y*=-1,this._z*=-1,this._onChangeCallback(),this}dot(t){return this._x*t._x+this._y*t._y+this._z*t._z+this._w*t._w}lengthSq(){return this._x*this._x+this._y*this._y+this._z*this._z+this._w*this._w}length(){return Math.sqrt(this._x*this._x+this._y*this._y+this._z*this._z+this._w*this._w)}normalize(){let t=this.length();if(t===0)this._x=0,this._y=0,this._z=0,this._w=1;else t=1/t,this._x=this._x*t,this._y=this._y*t,this._z=this._z*t,this._w=this._w*t;return this._onChangeCallback(),this}multiply(t){return this.multiplyQuaternions(this,t)}premultiply(t){return this.multiplyQuaternions(t,this)}multiplyQuaternions(t,e){let{_x:n,_y:i,_z:s,_w:a}=t,{_x:r,_y:o,_z:l,_w:c}=e;return this._x=n*c+a*r+i*l-s*o,this._y=i*c+a*o+s*r-n*l,this._z=s*c+a*l+n*o-i*r,this._w=a*c-n*r-i*o-s*l,this._onChangeCallback(),this}slerp(t,e){if(e===0)return this;if(e===1)return this.copy(t);let n=this._x,i=this._y,s=this._z,a=this._w,r=a*t._w+n*t._x+i*t._y+s*t._z;if(r<0)this._w=-t._w,this._x=-t._x,this._y=-t._y,this._z=-t._z,r=-r;else this.copy(t);if(r>=1)return this._w=a,this._x=n,this._y=i,this._z=s,this;let o=1-r*r;if(o<=Number.EPSILON){let h=1-e;return this._w=h*a+e*this._w,this._x=h*n+e*this._x,this._y=h*i+e*this._y,this._z=h*s+e*this._z,this.normalize(),this}let l=Math.sqrt(o),c=Math.atan2(l,r),u=Math.sin((1-e)*c)/l,f=Math.sin(e*c)/l;return this._w=a*u+this._w*f,this._x=n*u+this._x*f,this._y=i*u+this._y*f,this._z=s*u+this._z*f,this._onChangeCallback(),this}slerpQuaternions(t,e,n){return this.copy(t).slerp(e,n)}random(){let t=2*Math.PI*Math.random(),e=2*Math.PI*Math.random(),n=Math.random(),i=Math.sqrt(1-n),s=Math.sqrt(n);return this.set(i*Math.sin(t),i*Math.cos(t),s*Math.sin(e),s*Math.cos(e))}equals(t){return t._x===this._x&&t._y===this._y&&t._z===this._z&&t._w===this._w}fromArray(t,e=0){return this._x=t[e],this._y=t[e+1],this._z=t[e+2],this._w=t[e+3],this._onChangeCallback(),this}toArray(t=[],e=0){return t[e]=this._x,t[e+1]=this._y,t[e+2]=this._z,t[e+3]=this._w,t}fromBufferAttribute(t,e){return this._x=t.getX(e),this._y=t.getY(e),this._z=t.getZ(e),this._w=t.getW(e),this._onChangeCallback(),this}toJSON(){return this.toArray()}_onChange(t){return this._onChangeCallback=t,this}_onChangeCallback(){}*[Symbol.iterator](){yield this._x,yield this._y,yield this._z,yield this._w}}class C{constructor(t=0,e=0,n=0){C.prototype.isVector3=!0,this.x=t,this.y=e,this.z=n}set(t,e,n){if(n===void 0)n=this.z;return this.x=t,this.y=e,this.z=n,this}setScalar(t){return this.x=t,this.y=t,this.z=t,this}setX(t){return this.x=t,this}setY(t){return this.y=t,this}setZ(t){return this.z=t,this}setComponent(t,e){switch(t){case 0:this.x=e;break;case 1:this.y=e;break;case 2:this.z=e;break;default:throw Error("index is out of range: "+t)}return this}getComponent(t){switch(t){case 0:return this.x;case 1:return this.y;case 2:return this.z;default:throw Error("index is out of range: "+t)}}clone(){return new this.constructor(this.x,this.y,this.z)}copy(t){return this.x=t.x,this.y=t.y,this.z=t.z,this}add(t){return this.x+=t.x,this.y+=t.y,this.z+=t.z,this}addScalar(t){return this.x+=t,this.y+=t,this.z+=t,this}addVectors(t,e){return this.x=t.x+e.x,this.y=t.y+e.y,this.z=t.z+e.z,this}addScaledVector(t,e){return this.x+=t.x*e,this.y+=t.y*e,this.z+=t.z*e,this}sub(t){return this.x-=t.x,this.y-=t.y,this.z-=t.z,this}subScalar(t){return this.x-=t,this.y-=t,this.z-=t,this}subVectors(t,e){return this.x=t.x-e.x,this.y=t.y-e.y,this.z=t.z-e.z,this}multiply(t){return this.x*=t.x,this.y*=t.y,this.z*=t.z,this}multiplyScalar(t){return this.x*=t,this.y*=t,this.z*=t,this}multiplyVectors(t,e){return this.x=t.x*e.x,this.y=t.y*e.y,this.z=t.z*e.z,this}applyEuler(t){return this.applyQuaternion(ib.setFromEuler(t))}applyAxisAngle(t,e){return this.applyQuaternion(ib.setFromAxisAngle(t,e))}applyMatrix3(t){let e=this.x,n=this.y,i=this.z,s=t.elements;return this.x=s[0]*e+s[3]*n+s[6]*i,this.y=s[1]*e+s[4]*n+s[7]*i,this.z=s[2]*e+s[5]*n+s[8]*i,this}applyNormalMatrix(t){return this.applyMatrix3(t).normalize()}applyMatrix4(t){let e=this.x,n=this.y,i=this.z,s=t.elements,a=1/(s[3]*e+s[7]*n+s[11]*i+s[15]);return this.x=(s[0]*e+s[4]*n+s[8]*i+s[12])*a,this.y=(s[1]*e+s[5]*n+s[9]*i+s[13])*a,this.z=(s[2]*e+s[6]*n+s[10]*i+s[14])*a,this}applyQuaternion(t){let e=this.x,n=this.y,i=this.z,{x:s,y:a,z:r,w:o}=t,l=2*(a*i-r*n),c=2*(r*e-s*i),u=2*(s*n-a*e);return this.x=e+o*l+a*u-r*c,this.y=n+o*c+r*l-s*u,this.z=i+o*u+s*c-a*l,this}project(t){return this.applyMatrix4(t.matrixWorldInverse).applyMatrix4(t.projectionMatrix)}unproject(t){return this.applyMatrix4(t.projectionMatrixInverse).applyMatrix4(t.matrixWorld)}transformDirection(t){let e=this.x,n=this.y,i=this.z,s=t.elements;return this.x=s[0]*e+s[4]*n+s[8]*i,this.y=s[1]*e+s[5]*n+s[9]*i,this.z=s[2]*e+s[6]*n+s[10]*i,this.normalize()}divide(t){return this.x/=t.x,this.y/=t.y,this.z/=t.z,this}divideScalar(t){return this.multiplyScalar(1/t)}min(t){return this.x=M