Dear Debra,
to listen for keyboard input in MW you need to use "readchar", which
returns a character (look for the description of readchar in the on line
help for further info). To chek for any keys, even non printable ones like
the arrow keys, you need to use the ASCII code. In MW you could say:
make "key readchar
if (ascii :key) = 56 [fd 10]
To discover the ascii codes associated to various keys you could use the
following instruction in the command center:
show ascii readchar
As for the game you want to start a separate proces that does the following:
If a key has been pressed
then check if there is an action associated to that key
then execute the action
In MW you could say:
to keyboard-input
forever [if key? [process-key]]
end
to process-key
let [key ascii readchar]
if :key = 30 [fd 10 stop] ; up arrow key on the Mac
if :key = 31 [bk 10 stop] ; down arrow key on the Mac
end
If you have 2 turtles (t1 and t2) you can assign action to each turtle as
follows:
to process-key
let [key ascii readchar]
if :key = 30 [t1, fd 10 stop] ; t1 goes forward
if :key = 31 [t2, bk 10 stop] ; t2 goes back
end
In MW version 2 you might use "when" instead of "forever" to start a
separate process:
when [key?] [process-key]
(Check: key?, forever, when and let in the on-line help for more info)
I hope this helps.
Cheers,
Augusto
PS I do like Michael sample, it just shows that he's used to deal with kids
more than I do.
/// Augusto Chioccariello
/// Istituto Tecnologie Didattiche - CNR tel. +39 10 6475319
/// email: augusto@itd.ge.cnr.it fax +39 10 6475300
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