aaaaaahhh come on ... I am not THAT lazy :D 

of course I have searched it before asking. Unless I am blind I see loads of bezier methods, none that detects whether a point belong to a curve. But now you mention it I think I remember squeak was able to do add points to a curve via click or something similar, because thats what I wan to do. So I will take a look at it , most probably there is a method in there that does this.

I want the user to click on a curve or line and there a new control point will be placed that will allow the user to shape the line or curve to a finer detail. A standard feature for all vector editors , 3d editors, even image editors.  

I am sorry if I miss something obvious here, its not laziness , its most likely stupidity or just the fact I am very new with this. This is the first time I try to make a vector editor.Again thank you all for trying to help me, you have done already a lot. 

On Sat, Nov 23, 2013 at 3:38 PM, St�phane Ducasse <stephane.ducasse@inria.fr> wrote:

On Nov 23, 2013, at 11:24 AM, kilon alios <kilon.alios@gmail.com> wrote:

would I sound too lazy to ask in which class ? 

On Sat, Nov 23, 2013 at 11:35 AM, St�phane Ducasse <stephane.ducasse@inria.fr> wrote:

there are bezier algo in the system

Stef

On Nov 20, 2013, at 9:55 PM, kilon alios <kilon.alios@gmail.com> wrote:

yes I found the formula for straight lines and I was wondering what was the one for bezier curves, so your reply could not have come a better moment. Thanks I will study it and implement it. 

On Wed, Nov 20, 2013 at 9:21 PM, Hilaire Fernandes <hilaire.fernandes@gmail.com> wrote:

Hello,

You may want to calculate the distance between the mouse position and
your path (I guess a bezier curve). Then given this distance and a
tolerance to zero you decide if the mouse position is more or less on
your path. Calculating the distance you will also get for free the place
where to add a point on your path.

http://blog.gludion.com/2009/08/distance-to-quadratic-bezier-curve.html

Hilaire


Le 14/11/2013 21:07, kilon alios a �crit :

> In order to do that I will have to check that the line passes through a
> specific pixel. Or to be more correct that the place that mouse has
> clicked is where my path passes through. How I do that ? Can Athens do
> that ? Can athens tell me which pixels my path passes through ?
>

--
Dr. Geo http://drgeo.eu