Algodoo

Ty comrade!

But don't mind if you make the same but follows the target ?
If you say "no" im ok.

Sorry, I do not understand. Are you asking me if YOU can use this in your own scenes? If that is what you are asking, YES! You can use this in your own scenes!

Pootis-Man - Please explain what you are asking. I do not understand your request.

You said, "....make the same but follow the target". WHAT target? Do you want the small circle to follow a target instead of follow the cursor? Please explain.

shorter version:

vel = (app.mousepos - pos) * 10.0

If following object:

in leader object postStep:

scene.my.pos = pos

in follower object postStep:

vel = (scene.my.pos - pos) * 10.0

If you want to select a target by hitting it with a laser:

in laser onLaserHit:

e.geom.postStep = (e)=>{scene.my.pos = pos}

s_noonan - Thanks for your suggestions!