Create an area in shape of "D"

[Zechy]

Hi,

 

for my snooker game I need create an area in shape of letter "D", for the setting white ball to it. Is there easier way to create this area than create inaccurate polygon in this shape?

[Zechy]

Again faster than my mind.

 

It can be created circle and rectangle. This circle must be on center of table(axis X) and line where this "D" starting(axis Y).

 

Rectangle must be on half of circle and than just check if is point in this two shapes.

 

    var d_circle = new PIXI.Circle(x, y, radius);

    var d_rect = new PIXI.Rectangle(x, y, width = circle_radius, height);