, . ( ) , .
tBounce, .
Ball (), , . tBounce, -1 (. 4.10).
tBounce , "" .
, (. 4.11), [] :
tBounce = getTime();
getTime .
tBounce -1 . (, 0.1 ), (. 4.12):
getTime () < ball.tBounce+0.1? Color.red: Color.blue
ball 0.1 .
. Root , Ball , Root. ball1 (. 4.13). ( ), , Ball.
0 0 200 300 (. 4.14).
, . <Ctrl> . , ( ) ball1.
ball1 , ball.x, ball. bail.tBounce bell1., ball1.y ball1.tBounce (. 4.15). 1 2 ball1.r ball.r.
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. . Balls1 Part I.