Algodoo

Very clever idea! Well coded, and instructions are clear and straightforward.

Thanks.

You could use scene.cloneEntity instead of doeing it by yourself...

Kilinich,

Thanks. I was able to reduce the code by 87% by using your suggestion.

You should use := instead of = for creating local temporary variables

OK. Did it. I don't know what the advantage of doing this is, but I'll defer to your judgment on this matter.

I can't speak for kilinich, of course, but I believe that the use of a colon along with the equal sign when defining a variable is only for good programming practice, and not for anything that would affect the operation of the code. When you use the colon, Algodoo will warn you with a message in the console if you accidentally define the same variable twice. For example, in your "onClick" code, you define G0 in the first line. Just to prove my point, I added a line on top of the line that defines G0, as follows....
g0 := 0;
When I ran the code, the following message was printed in the console:
81870 ms: - WARNING - Variable "g0" already declared in this scope.

If there is any other reason for using the colon besides good programming practice, I would like to know about it.

Thanks Xray. That makes sense. I'm guessing that there may also be a case where a value can be assigned to an existing global variable of the same name if the variable is not declared locally.

There is another rule concerning colons, and that is when you assign values to variables within functions you must always use a colon along with the equal sign. I recall reading about that in the forum some time ago.

There is another rule concerning colons, and that is "An apple a day keeps the doctor away".

And one more rule.... Before you go in for your colonoscopy appointment, make absolutely sure that you.... um...... never mind.