Displaying 1 result from an estimated 1 matches for "turtlebasic".
2003 Oct 27
1
Difficulties with R.oo (static fields, etc.)
...t instance of a class (i.e., to
initialize
value of static fields only once)
3) I am not sure how to remove/delete cleanly existing instances. In
particular,
I don't know how to reset tcktk when the last instance is deleted.
Here is the sort of behavior I would like to get:
t1<-TurtleBasic() # a window (the Turtle world) with a turtle appears
forward(t1,50) # the turtle moves (turtle's state is also updated)
turn(t1,pi/2)
forward(t1,50)
t2<-TurtleBasic() # a second turtle in the Turtle world appears
turn(t2,pi/2) # second turtle moves
forward(t1,50)
delete(t1) # fir...