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Subject: Re: Second Turtle following First Turtle, but from a Distance
From: Alain LCSI <alain@xxxxxxx>
Date: Sun, 08 Jul 2007 11:00:50 -0400

Hi!

You want t2 to run after t1 without actually reaching it?

How about asking t2 to point towards 2, and then moving towards it if and only if the distance between the two is greater than a certain number:

to getcloser
towards "t1
if (distance "t1) > 40 [fd 2]
end

Put that in t2's backpack (Proc tab) and put getcloser in the onclick field, in forever mode. Click on t2. Move t1 around. You will see t2 running after t1, not touching it.

Play with parameters (40 and 2) until suitable.

This is just a suggestion. You will probably have to alter the proc to get the desired behavior.

Good luck,

Alain Tougas
alain@xxxxxxx
B: (514) 939-8700 poste 237



Le 07-07-08 à 08:40, John Kendall a écrit :

Hi, Everyone,

I'm teaching a summer school class of 6th, 7th and 8th graders, using MicroWorlds.

Two of my students are creating an animation with the gym background, and two of the basketball playing shapes for two turtles (first turtle is named "bbof" for "basketball offense" and the second turtle is named "bbdf" for "basketball defense").

They want the offensive basketball turtle to drive towards the basket while dribbling the ball, and attempt to make a "lay up." They also want the defensive basketball turtle to follow the first player, but can't "touch" it, because that would be a foul in the actual game.

The "How do I make a turtle move to touch another turtle?" (http:// mia.openworldlearning.org/howdoi/rns.htm) in the "How Do I?" section of the OWL / MIA web site helps explain one turtle pointing towards another turtle, but we don't want our defensive player to land "on" the first one. Is there a "plus" or "minus" bit of code which would help adapt my students' animation? I'm not good with the math part, but I keep thinking it wouldn't be hard to adjust.

John Kendall
Rutgers Preparatory School
Somerset, New Jersey


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