Quadratic Curve with JS

curvePath = [];

var step = 1 / 100;

var point1, point2, point3;

point1 = {'x': 0, 'y':0};

point2 = {'x':250, 'y':200};
 
point3 = {'x': 500, 'y':0};

var posX, posY;

//This loops calculates each step of the curve
for (var u = 0; u <= 1; u += step) { 
    posX = (Math.pow((1-u),2)*point1.x) + (2*(1-u)*u*point2.x) + (Math.pow(u,2)*point3.x);
    posY = (Math.pow((1-u),2)*point1.y) + (2*(1-u)*u*point2.y) + (Math.pow(u,2)*point3.y);
    curvePath.push({'x':posX, 'y':posY});
}