Re: A Geometric Java Problem

[Mihail Mihaylov]

Glynn Clements, 
thank you. With minor modifications I made it to work.
mich

On Tue, 21 Jul 1998, Glynn Clements wrote:

> 
> Mihail Mihaylov wrote:
> 
> > I want to add a small circle at the end of a line. Whenever I drag the 
> > line, with my mouse or rotate it around, I want the circle to get 
> > updated appropriately and to be at the end of that line.
> 
> Do you want the circle to be centred upon the line's endpoint, or to
> be centred on the line and touching the endpoint?
> 
> Assuming it's the latter, try:
> 
> Graphics g;
> int radius;
> 
> void DrawCircle(int x0, int y0, int x1, int y1)
> {
>       double vx = x1 - x0;
>       double vy = y1 - y0;
> 
>       double d = Math.sqrt(vx * vx + vy * vy);
>       vx /= d;
>       vy /= d;
> 
>       int x = x1 + radius * vx;
>       int y = y1 + radius * vy;
> 
>       g.drawOval(
>               x - radius, y - radius,
>               radius * 2, radius * 2
>       );
> }
> 
> >  How can I join the newsgroup?
> 
> Newsgroup?
> 
> -- 
> Glynn Clements <[EMAIL PROTECTED]>
>