I have this practice project that allows the user to draw on the screen as they touch with their fingers. Very simple App I did as an exercise way back.
My little cousin took the liberty of drawing things with his finger with my iPad on this App (Kids drawings: circle, lines, etc, whatever came to his mind).
Then he started to draw circles and then he asked me to make it a &quot;good circle&quot; (from my understanding: make the drawn circle perfectly round, as we know 
no matter how stable we try to draw something with our finger on the screen, a circle is never really as rounded as a circle should be). 

So my question here is that, is there any way in code where we can first detect a line drawn by the user that forms a circle and generate approximately the same size of the circle by making it perfectly round on the screen. Making a not so straight line straight is something I would know how to do, but as for circle, I don&#39;t quite know how to go about doing it with Quartz or other methods. 

My reasoning is that, the start and the end point of the line must touch or cross each other after the user lifts his finger to justify the fact that he was trying to actually draw a circle.


All Shape Recognition Solutions on Gang of Coders

Total of 1 Shape Recognition Solutions

Draw a perfect circle from user's touch