JavaScript-Pool-Game-Tutorial/Vector2.js at master · henshmi/JavaScript-Pool-Game-Tutorial · GitHub

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functionVector2(x=0,y=0){

this.x=x;
this.y=y;
}

Vector2.prototype.copy=function(){
returnnewVector2(this.x,this.y);
}

Vector2.prototype.add=function(vector){
returnnewVector2(this.x+vector.x,this.y+vector.y);
}

Vector2.prototype.addTo=function(vector){
this.x+=vector.x;
this.y+=vector.y;
}

Vector2.prototype.subtract=function(vector){
returnnewVector2(this.x-vector.x,this.y-vector.y);
}

Vector2.prototype.mult=function(scalar){

returnnewVector2(this.x*scalar,this.y*scalar);
}

Vector2.prototype.dot=function(vector){
returnthis.x*vector.x+this.y*vector.y;
}

Vector2.prototype.length=function(){
returnMath.sqrt(Math.pow(this.x,2)+Math.pow(this.y,2));
}

Vector2.prototype.distFrom=function(vector){
returnthis.subtract(vector).length();
}