is.y=Math.ceil(this.y),this}round(){return this.x=Math.round(this.x),this.y=Math.round(this.y),this}roundToZero(){return this.x=Math.trunc(this.x),this.y=Math.trunc(this.y),this}negate(){return this.x=-this.x,this.y=-this.y,this}dot(t){return this.x*t.x+this.y*t.y}cross(t){return this.x*t.y-this.y*t.x}lengthSq(){return this.x*this.x+this.y*this.y}length(){return Math.sqrt(this.x*this.x+this.y*this.y)}manhattanLength(){return Math.abs(this.x)+Math.abs(this.y)}normalize(){return this.divideScalar(this.length()||1)}angle(){return Math.atan2(-this.y,-this.x)+Math.PI}angleTo(t){let e=Math.sqrt(this.lengthSq()*t.lengthSq());if(e===0)return Math.PI/2;let n=this.dot(t)/e;return Math.acos(ne(n,-1,1))}distanceTo(t){return Math.sqrt(this.distanceToSquared(t))}distanceToSquared(t){let e=this.x-t.x,n=this.y-t.y;return e*e+n*n}manhattanDistanceTo(t){return Math.abs(this.x-t.x)+Math.abs(this.y-t.y)}setLength(t){return this.normalize().multiplyScalar(t)}lerp(t,e){return this.x+=(t.x-this.x)*e,this.y+=(t.y-this.y)*e,this}lerpVectors(t,e,n){return this.x=t.x+(e.x-t.x)*n,this.y=t.y+(e.y-t.y)*n,this}equals(t){return t.x===this.x&&t.y===this.y}fromArray(t,e=0){return this.x=t[e],this.y=t[e+1],this}toArray(t=[],e=0){return t[e]=this.x,t[e+1]=this.y,t}fromBufferAttribute(t,e){return this.x=t.getX(e),this.y=t.getY(e),this}rotateAround(t,e){let n=Math.cos(e),i=Math.sin(e),s=this.x-t.x,a=this.y-t.y;return this.x=s*n-a*i+t.x,this.y=s*i+a*n+t.y,this}random(){return this.x=Math.random(),this.y=Math.random(),this}*[Symbol.iterator](){yield this.x,yield this.y}}class Qn{constructor(t=0,e=0,n=0,i=1){this.isQuaternion=!0,this._x=t,this._y=e,this._z=n,this._w=i}static slerpFlat(t,e,n,i,s,a,r){let o=n[i+0],l=n[i+1],c=n[i+2],u=n[i+3],f=s[a+0],h=s[a+1],p=s[a+2],v=s[a+3];if(r===0){t[e+0]=o,t[e+1]=l,t[e+2]=c,t[e+3]=u;return}if(r===1){t[e+0]=f,t[e+1]=h,t[e+2]=p,t[e+3]=v;return}if(u!==v||o!==f||l!==h||c!==p){let y=1-r,U=o*f+l*h+c*p+u*v,d=U>=0?1:-1,g=1-U*U;if(g>Number.EPSILON){let x=Math.sqrt(g),S=Math.atan2(x,U*d);y=Math.sin(y*S)/x,r=Math.sin(r*S)/x}let m=r*d;if(o=o*y+f*m,l=l*y+h*m,c=c*y+p*m,u=u*y+v*m,y===1-r){let x=1/Math.sqrt(o*o+l*l+c*c+u*u);o*=x,l*=x,c*=x,u*=x}}t[e]=o,t[e+1]=l,t[e+2]=c,t[e+3]=u}static multiplyQuaternionsFlat(t,e,n,i,s,a){let r=n[i],o=n[i+1],l=n[i+2],c=n[i+3],u=s[a],f=s[a+1],h=s[a+2],p=s[a+3];return t[e]=r*p+c*u+o*h-l*f,t[e+1]=o*p+c*f+l*u-r*h,t[e+2]=l*p+c*h+r*f-o*u,t[e+3]=c*p-r*u-o*f-l*h,t}get x(){return this._x}set x(t){this._x=t,this._onChangeCallback()}get y(){return this._y}set y(t){this._y=t,this._onChangeCallback()}get z(){return this._z}set z(t){this._z=t,this._onChangeCallback()}get w(){return this._w}set w(t){this._w=t,this._onChangeCallback()}set(t,e,n,i){return this._x=t,this._y=e,this._z=n,this._w=i,this._onChangeCallback(),this}clone(){return new this.constructor(this._x,this._y,this._z,this._w)}copy(t){return this._x=t.x,this._y=t.y,this._z=t.z,this._w=t.w,this._onChangeCallback(),this}setFromEuler(t,e=!0){let{_x:n,_y:i,_z:s,_order:a}=t,{cos:r,sin:o}=Math,l=r(n/2),c=r(i/2),u=r(s/2),f=o(n/2),h=o(i/2),p=o(s/2);switch(a){case"XYZ":this._x=f*c*u+l*h*p,this._y=l*h*u-f*c*p,this._z=l*c*p+f*h*u,this._w=l*c*u-f*h*p;break;case"YXZ":this._x=f*c*u+l*h*p,this._y=l*h*u-f*c*p,this._z=l*c*p-f*h*u,this._w=l*c*u+f*h*p;break;case"ZXY":this._x=f*c*u-l*h*p,this._y=l*h*u+f*c*p,this._z=l*c*p+f*h*u,this._w=l*c*u-f*h*p;break;case"ZYX":this._x=f*c*u-l*h*p,this._y=l*h*u+f*c*p,this._z=l*c*p-f*h*u,this._w=l*c*u+f*h*p;break;case"YZX":this._x=f*c*u+l*h*p,this._y=l*h*u+f*c*p,this._z=l*c*p-f*h*u,this._w=l*c*u-f*h*p;break;case"XZY":this._x=f*c*u-l*h*p,this._y=l*h*u-f*c*p,this._z=l*c*p+f*h*u,this._w=l*c*u+f*h*p;break;default:console.warn("THREE.Quaternion: .setFromEuler() encountered an unknown order: "+a)}if(e===!0)this._onChangeCallback();return this}setFromAxisAngle(t,e){let n=e/2,i=Math.sin(n);return this._x=t.x*i,this._y=t.y*i,this._z=t.z*i,this._w=Math.cos(n),this._onChangeCallback(),this}setFromRotationMatrix(t){let e=t.elements,n=e[0],i=e[4],s=e[8],a=e[1],r=e[5],o=e[9],l=e[2],c=e[6],u=e[10],f=n+r+u;if(f>0){let h=0.5/Math.sqrt(f+1);this._w=0.25/h,this._x=(c-o)*h,this._y=(s-l)*h,this._z=(a-i)*h}else if(n>r&&n>u){let h=2*Math.sqrt(1+n-r-u);this._w=(c-o)/h,this._x=0.25*h,this._y=(i+a)/h,this._z=(s+l)/h}else if(r>u){let h=2*Math.sqrt(1+r-n-u);this._w=(s-l)/h,this._x=(i+a)/h,this._y=0.25*h,this._z=(o+c)/h}else{let h=2*Math.sqrt(1+u-n-r);this._w=(a-i)/h,this._x=(s+l)/h,this._y=(o+c)/h,this._z=0.25*h}return this._onChangeCallback(),this}setFromUnitVectors(t,e){let n=t.dot(e)+1;if(n<0.00000001)if(n=0,Math.abs(t.x)>Math.abs(t.z))this._x=-t.y,this._y=t.x,this._z=0,this._w=n;else this._x=0,this._y=-t.z,this._z=t.y,this._w=n;else this._x=t.y*e.z-t.z*e.y,this._y=t.z*e.x-t.x*e.z,this._z=t.x*e.y-t.y*e.x,this._w=n;return this.normalize()}angleTo(t){return 2*Math.acos(Math.abs(ne(this.dot(t),-1,1)))}rotateTowards(t,e){let n=this.angleTo(t);if(n===0)return this;let i=Math.min(1,e/n);return this.slerp(t,i),this}identity(){r