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[READ-ONLY] Mirror of https://github.com/flo-bit/shapecraft. flo-bit.dev/shapecraft
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5.7 kB · 480 lines
JavaScript
at commit da69385e
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class Vector2 {
constructor( x = 0, y = 0 ) {
Vector2.prototype.isVector2 = true;
this.x = x; this.y = y;
}
get width() {
return this.x;
}
set width( value ) {
this.x = value;
}
get height() {
return this.y;
}
set height( value ) {
this.y = value;
}
set( x, y ) {
this.x = x; this.y = y;
return this;
}
setScalar( scalar ) {
this.x = scalar; this.y = scalar;
return this;
}
setX( x ) {
this.x = x;
return this;
}
setY( y ) {
this.y = y;
return this;
}
setComponent( index, value ) {
switch ( index ) {
case 0: this.x = value; break; case 1: this.y = 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; default: throw new Error( 'index is out of range: ' + index );
}
}
clone() {
return new this.constructor( this.x, this.y );
}
copy( v ) {
this.x = v.x; this.y = v.y;
return this;
}
add( v ) {
this.x += v.x; this.y += v.y;
return this;
}
addScalar( s ) {
this.x += s; this.y += s;
return this;
}
addVectors( a, b ) {
this.x = a.x + b.x; this.y = a.y + b.y;
return this;
}
addScaledVector( v, s ) {
this.x += v.x * s; this.y += v.y * s;
return this;
}
sub( v ) {
this.x -= v.x; this.y -= v.y;
return this;
}
subScalar( s ) {
this.x -= s; this.y -= s;
return this;
}
subVectors( a, b ) {
this.x = a.x - b.x; this.y = a.y - b.y;
return this;
}
multiply( v ) {
this.x *= v.x; this.y *= v.y;
return this;
}
multiplyScalar( scalar ) {
this.x *= scalar; this.y *= scalar;
return this;
}
divide( v ) {
this.x /= v.x; this.y /= v.y;
return this;
}
divideScalar( scalar ) {
return this.multiplyScalar( 1 / scalar );
}
applyMatrix3( m ) {
const x = this.x, y = this.y; const e = m.elements;
this.x = e[ 0 ] * x + e[ 3 ] * y + e[ 6 ]; this.y = e[ 1 ] * x + e[ 4 ] * y + e[ 7 ];
return this;
}
min( v ) {
this.x = Math.min( this.x, v.x ); this.y = Math.min( this.y, v.y );
return this;
}
max( v ) {
this.x = Math.max( this.x, v.x ); this.y = Math.max( this.y, v.y );
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 ) );
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 ) );
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 );
return this;
}
ceil() {
this.x = Math.ceil( this.x ); this.y = Math.ceil( this.y );
return this;
}
round() {
this.x = Math.round( this.x ); this.y = Math.round( this.y );
return this;
}
roundToZero() {
this.x = Math.trunc( this.x ); this.y = Math.trunc( this.y );
return this;
}
negate() {
this.x = - this.x; this.y = - this.y;
return this;
}
dot( v ) {
return this.x * v.x + this.y * v.y;
}
cross( v ) {
return this.x * v.y - this.y * v.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() {
// computes the angle in radians with respect to the positive x-axis
const angle = Math.atan2( - this.y, - this.x ) + Math.PI;
return angle;
}
angleTo( v ) {
const denominator = Math.sqrt( this.lengthSq() * v.lengthSq() );
if ( denominator === 0 ) return Math.PI / 2;
const theta = this.dot( v ) / denominator;
// clamp, to handle numerical problems
return Math.acos( MathUtils.clamp( theta, - 1, 1 ) );
}
distanceTo( v ) {
return Math.sqrt( this.distanceToSquared( v ) );
}
distanceToSquared( v ) {
const dx = this.x - v.x, dy = this.y - v.y; return dx * dx + dy * dy;
}
manhattanDistanceTo( v ) {
return Math.abs( this.x - v.x ) + Math.abs( this.y - v.y );
}
setLength( length ) {
return this.normalize().multiplyScalar( length );
}
lerp( v, alpha ) {
this.x += ( v.x - this.x ) * alpha; this.y += ( v.y - this.y ) * 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;
return this;
}
equals( v ) {
return ( ( v.x === this.x ) && ( v.y === this.y ) );
}
fromArray( array, offset = 0 ) {
this.x = array[ offset ]; this.y = array[ offset + 1 ];
return this;
}
toArray( array = [], offset = 0 ) {
array[ offset ] = this.x; array[ offset + 1 ] = this.y;
return array;
}
fromBufferAttribute( attribute, index ) {
this.x = attribute.getX( index ); this.y = attribute.getY( index );
return this;
}
rotateAround( center, angle ) {
const c = Math.cos( angle ), s = Math.sin( angle );
const x = this.x - center.x; const y = this.y - center.y;
this.x = x * c - y * s + center.x; this.y = x * s + y * c + center.y;
return this;
}
random() {
this.x = Math.random(); this.y = Math.random();
return this;
}
*[ Symbol.iterator ]() {
yield this.x; yield this.y;
}
}
export { Vector2 };