Basic shapes ......


I want to make my own graphical labrary, I fail to find how to make the circle from scratch. If any body have an idea… Do tell me.

I want the formulae for making the circle and other shapes of this family.

Try to send some link …


This is OT for this forum, moving to the math and algorithms section, on you may get an answer there.

Try searching for quadrics on google.

The equation of the circle is

(x-a)^2 + (y-b)^2 = r^2.

This is the circle of center (a, b) and
radius r.

A general quadric has the equation:

a x^2 + b y^2 + c xy + d x + e y + f = 0

Other quadrics are : ellipse, hiperbola,
parabola. Lines are degenerated quadrics…

I hope I have helped you even I haven’t sent you a link…