class Vector4 { constructor( x = 0, y = 0, z = 0, w = 1 ) { this.x = x; this.y = y; this.z = z; this.w = w; } get width() { return this.z; } set width( value ) { this.z = value; } get height() { return this.w; } set height( value ) { this.w = value; } set( x, y, z, w ) { this.x = x; this.y = y; this.z = z; this.w = w; return this; } setScalar( scalar ) { this.x = scalar; this.y = scalar; this.z = scalar; this.w = scalar; return this; } setX( x ) { this.x = x; return this; } setY( y ) { this.y = y; return this; } setZ( z ) { this.z = z; return this; } setW( w ) { this.w = w; return this; } setComponent( index, value ) { switch ( index ) { case 0: this.x = value; break; case 1: this.y = value; break; case 2: this.z = value; break; case 3: this.w = value; break; default: throw new Error( 'index is out of range: ' + index ); } return this; } getComponent( index ) { switch ( index ) { case 0: return this.x; case 1: return this.y; case 2: return this.z; case 3: return this.w; default: throw new Error( 'index is out of range: ' + index ); } } clone() { return new this.constructor( this.x, this.y, this.z, this.w ); } copy( v ) { this.x = v.x; this.y = v.y; this.z = v.z; this.w = ( v.w !== undefined ) ? v.w : 1; return this; } add( v, w ) { if ( w !== undefined ) { console.warn( 'THREE.Vector4: .add() now only accepts one argument. Use .addVectors( a, b ) instead.' ); return this.addVectors( v, w ); } this.x += v.x; this.y += v.y; this.z += v.z; this.w += v.w; return this; } addScalar( s ) { this.x += s; this.y += s; this.z += s; this.w += s; return this; } addVectors( a, b ) { this.x = a.x + b.x; this.y = a.y + b.y; this.z = a.z + b.z; this.w = a.w + b.w; return this; } addScaledVector( v, s ) { this.x += v.x * s; this.y += v.y * s; this.z += v.z * s; this.w += v.w * s; return this; } sub( v, w ) { if ( w !== undefined ) { console.warn( 'THREE.Vector4: .sub() now only accepts one argument. Use .subVectors( a, b ) instead.' ); return this.subVectors( v, w ); } this.x -= v.x; this.y -= v.y; this.z -= v.z; this.w -= v.w; return this; } subScalar( s ) { this.x -= s; this.y -= s; this.z -= s; this.w -= s; return this; } subVectors( a, b ) { this.x = a.x - b.x; this.y = a.y - b.y; this.z = a.z - b.z; this.w = a.w - b.w; return this; } multiply( v ) { this.x *= v.x; this.y *= v.y; this.z *= v.z; this.w *= v.w; return this; } multiplyScalar( scalar ) { this.x *= scalar; this.y *= scalar; this.z *= scalar; this.w *= scalar; return this; } applyMatrix4( m ) { const x = this.x, y = this.y, z = this.z, w = this.w; const e = m.elements; this.x = e[ 0 ] * x + e[ 4 ] * y + e[ 8 ] * z + e[ 12 ] * w; this.y = e[ 1 ] * x + e[ 5 ] * y + e[ 9 ] * z + e[ 13 ] * w; this.z = e[ 2 ] * x + e[ 6 ] * y + e[ 10 ] * z + e[ 14 ] * w; this.w = e[ 3 ] * x + e[ 7 ] * y + e[ 11 ] * z + e[ 15 ] * w; return this; } divideScalar( scalar ) { return this.multiplyScalar( 1 / scalar ); } setAxisAngleFromQuaternion( q ) { // http://www.euclideanspace.com/maths/geometry/rotations/conversions/quaternionToAngle/index.htm // q is assumed to be normalized this.w = 2 * Math.acos( q.w ); const s = Math.sqrt( 1 - q.w * q.w ); if ( s < 0.0001 ) { this.x = 1; this.y = 0; this.z = 0; } else { this.x = q.x / s; this.y = q.y / s; this.z = q.z / s; } return this; } setAxisAngleFromRotationMatrix( m ) { // http://www.euclideanspace.com/maths/geometry/rotations/conversions/matrixToAngle/index.htm // assumes the upper 3x3 of m is a pure rotation matrix (i.e, unscaled) let angle, x, y, z; // variables for result const epsilon = 0.01, // margin to allow for rounding errors epsilon2 = 0.1, // margin to distinguish between 0 and 180 degrees te = m.elements, m11 = te[ 0 ], m12 = te[ 4 ], m13 = te[ 8 ], m21 = te[ 1 ], m22 = te[ 5 ], m23 = te[ 9 ], m31 = te[ 2 ], m32 = te[ 6 ], m33 = te[ 10 ]; if ( ( Math.abs( m12 - m21 ) < epsilon ) && ( Math.abs( m13 - m31 ) < epsilon ) && ( Math.abs( m23 - m32 ) < epsilon ) ) { // singularity found // first check for identity matrix which must have +1 for all terms // in leading diagonal and zero in other terms if ( ( Math.abs( m12 + m21 ) < epsilon2 ) && ( Math.abs( m13 + m31 ) < epsilon2 ) && ( Math.abs( m23 + m32 ) < epsilon2 ) && ( Math.abs( m11 + m22 + m33 - 3 ) < epsilon2 ) ) { // this singularity is identity matrix so angle = 0 this.set( 1, 0, 0, 0 ); return this; // zero angle, arbitrary axis } // otherwise this singularity is angle = 180 angle = Math.PI; const xx = ( m11 + 1 ) / 2; const yy = ( m22 + 1 ) / 2; const zz = ( m33 + 1 ) / 2; const xy = ( m12 + m21 ) / 4; const xz = ( m13 + m31 ) / 4; const yz = ( m23 + m32 ) / 4; if ( ( xx > yy ) && ( xx > zz ) ) { // m11 is the largest diagonal term if ( xx < epsilon ) { x = 0; y = 0.707106781; z = 0.707106781; } else { x = Math.sqrt( xx ); y = xy / x; z = xz / x; } } else if ( yy > zz ) { // m22 is the largest diagonal term if ( yy < epsilon ) { x = 0.707106781; y = 0; z = 0.707106781; } else { y = Math.sqrt( yy ); x = xy / y; z = yz / y; } } else { // m33 is the largest diagonal term so base result on this if ( zz < epsilon ) { x = 0.707106781; y = 0.707106781; z = 0; } else { z = Math.sqrt( zz ); x = xz / z; y = yz / z; } } this.set( x, y, z, angle ); return this; // return 180 deg rotation } // as we have reached here there are no singularities so we can handle normally let s = Math.sqrt( ( m32 - m23 ) * ( m32 - m23 ) + ( m13 - m31 ) * ( m13 - m31 ) + ( m21 - m12 ) * ( m21 - m12 ) ); // used to normalize if ( Math.abs( s ) < 0.001 ) s = 1; // prevent divide by zero, should not happen if matrix is orthogonal and should be // caught by singularity test above, but I've left it in just in case this.x = ( m32 - m23 ) / s; this.y = ( m13 - m31 ) / s; this.z = ( m21 - m12 ) / s; this.w = Math.acos( ( m11 + m22 + m33 - 1 ) / 2 ); return this; } min( v ) { this.x = Math.min( this.x, v.x ); this.y = Math.min( this.y, v.y ); this.z = Math.min( this.z, v.z ); this.w = Math.min( this.w, v.w ); return this; } max( v ) { this.x = Math.max( this.x, v.x ); this.y = Math.max( this.y, v.y ); this.z = Math.max( this.z, v.z ); this.w = Math.max( this.w, v.w ); return this; } clamp( min, max ) { // assumes min < max, componentwise this.x = Math.max( min.x, Math.min( max.x, this.x ) ); this.y = Math.max( min.y, Math.min( max.y, this.y ) ); this.z = Math.max( min.z, Math.min( max.z, this.z ) ); this.w = Math.max( min.w, Math.min( max.w, this.w ) ); return this; } clampScalar( minVal, maxVal ) { this.x = Math.max( minVal, Math.min( maxVal, this.x ) ); this.y = Math.max( minVal, Math.min( maxVal, this.y ) ); this.z = Math.max( minVal, Math.min( maxVal, this.z ) ); this.w = Math.max( minVal, Math.min( maxVal, this.w ) ); return this; } clampLength( min, max ) { const length = this.length(); return this.divideScalar( length || 1 ).multiplyScalar( Math.max( min, Math.min( max, length ) ) ); } floor() { this.x = Math.floor( this.x ); this.y = Math.floor( this.y ); this.z = Math.floor( this.z ); this.w = Math.floor( this.w ); return this; } ceil() { this.x = Math.ceil( this.x ); this.y = Math.ceil( this.y ); this.z = Math.ceil( this.z ); this.w = Math.ceil( this.w ); return this; } round() { this.x = Math.round( this.x ); this.y = Math.round( this.y ); this.z = Math.round( this.z ); this.w = Math.round( this.w ); return this; } roundToZero() { this.x = ( this.x < 0 ) ? Math.ceil( this.x ) : Math.floor( this.x ); this.y = ( this.y < 0 ) ? Math.ceil( this.y ) : Math.floor( this.y ); this.z = ( this.z < 0 ) ? Math.ceil( this.z ) : Math.floor( this.z ); this.w = ( this.w < 0 ) ? Math.ceil( this.w ) : Math.floor( this.w ); return this; } negate() { this.x = - this.x; this.y = - this.y; this.z = - this.z; this.w = - this.w; return this; } dot( v ) { return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.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 ); } manhattanLength() { return Math.abs( this.x ) + Math.abs( this.y ) + Math.abs( this.z ) + Math.abs( this.w ); } normalize() { return this.divideScalar( this.length() || 1 ); } setLength( length ) { return this.normalize().multiplyScalar( length ); } lerp( v, alpha ) { this.x += ( v.x - this.x ) * alpha; this.y += ( v.y - this.y ) * alpha; this.z += ( v.z - this.z ) * alpha; this.w += ( v.w - this.w ) * alpha; return this; } lerpVectors( v1, v2, alpha ) { this.x = v1.x + ( v2.x - v1.x ) * alpha; this.y = v1.y + ( v2.y - v1.y ) * alpha; this.z = v1.z + ( v2.z - v1.z ) * alpha; this.w = v1.w + ( v2.w - v1.w ) * alpha; return this; } equals( v ) { return ( ( v.x === this.x ) && ( v.y === this.y ) && ( v.z === this.z ) && ( v.w === this.w ) ); } fromArray( array, offset = 0 ) { this.x = array[ offset ]; this.y = array[ offset + 1 ]; this.z = array[ offset + 2 ]; this.w = array[ offset + 3 ]; return this; } toArray( array = [], offset = 0 ) { array[ offset ] = this.x; array[ offset + 1 ] = this.y; array[ offset + 2 ] = this.z; array[ offset + 3 ] = this.w; return array; } fromBufferAttribute( attribute, index, offset ) { if ( offset !== undefined ) { console.warn( 'THREE.Vector4: offset has been removed from .fromBufferAttribute().' ); } this.x = attribute.getX( index ); this.y = attribute.getY( index ); this.z = attribute.getZ( index ); this.w = attribute.getW( index ); return this; } random() { this.x = Math.random(); this.y = Math.random(); this.z = Math.random(); this.w = Math.random(); return this; } } Vector4.prototype.isVector4 = true; export { Vector4 };