Might it be possible someday to add a line to the balloon help for a sketch's rotation center to "press Shift to move" -- assuming this action is required across operating systems. Not having this causes some frustration in workshops.
--Randy
Hi, Randy,
Good idea, and now done! Update "0534rotCenterHaloHelp-sw" implements this suggestion; it should appear with the next batch of updates, once they get pushed to the external Squeakland update server.
Cheers,
-- Scott
At 7:34 PM -0500 2/16/06, Randy Heiland wrote:
Might it be possible someday to add a line to the balloon help for a sketch's rotation center to "press Shift to move" -- assuming this action is required across operating systems. Not having this causes some frustration in workshops.
--Randy
For older children, you should do real inverse square orbits. Squeak Etoys does these very well. Don't forget that you can choose to have the "origin at center" in any playfield. This means that any player put in a playfield will also act as a vector, and this can make it very easy to model 2D accelleration, velocity and position. (There is also a vector vocabulary for players which can be turned on to allow simple + and - vector arithmetic to be done between players, etc.)
A fun thing to do (especially since it is intractable with classical math) is to do the 3 to n body calculations. Turn the pen on for the third body and you get beautiful chaotic curves, etc.
Also, when using embedding, think about what it means for each player to be a coordinate system for the players embedded in it.
Cheers,
Alan
At 04:34 PM 2/16/2006, Randy Heiland wrote:
Might it be possible someday to add a line to the balloon help for a sketch's rotation center to "press Shift to move" -- assuming this action is required across operating systems. Not having this causes some frustration in workshops.
--Randy
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