Re: How to paint a laser that shows the trajectory of the gun.

Hi,

drawLine uses start and end points, perhaps you wanted something like

g.drawLine((int) getX(),(int) getY(), (int) (x+getX()),(int) (y+getY()));

HTH
Johannes

On Sat, Mar 28, 2015 at 10:05 AM,  <[email protected]> wrote:
> I want to see a laser representation of the gun aiming.. Basically a line
> that starts at the robot and ends at the point the gun is aiming at. Here is
> my code:
>
> public void onPaint(Graphics2D g){
>
>                          int laserLength = 200;
>                          double heading =getGunHeading();
>
>                         g.setColor(Color.RED);
>                 double x = Math.sin(Math.toRadians(heading)) * laserLength;
>                         double y = Math.cos(Math.toRadians(heading)) *
> laserLength;
>                 g.drawLine((int)getX(),(int) getY(), (int)x,(int) y);
>
> }
>
> The laser starts at the robot but points to an irrelevant direction.
>
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