balls Bouncing off

[chenyang]

i just starting using director MX 2004, Lingo is brand new to me.
i need help in writing the lingo script for a ball to bounce off an object when it touches it..

i have set up the boundaries as 400 x 300
i have a four sided box in the middle as
sprite3(L=133,T=121,R=260,B=161)Left Top Right and Bottom of the sprite respectively.

ball size is 34pixels in diameter

below is the script where the boudaries are set
if ballH < 0 then
hmove = 4 - random(3)
vmove = 4 - random(8)
puppetsound(1), "tone3a"
end if

if ballH > 366 then
hmove = -(4 - random(3))
vmove = 4 - random(8)
puppetsound(1), "tone3a"
end if

if ballV < 0 then
vmove = 4 - random(3)
hmove = 4 - random(8)
puppetsound(1), "tone4"
end if

if ballV > 266 then
vmove = -(4 - random(3))
hmove = 4 - random(8)
puppetsound(1), "tone4"
end if

now how do i make the ball bounce off the square ive drawn?

 

[kennethkawamoto]

This is probably close to what you want to achieve? This is a behaviour script ant should be attached to your ball sprite.
--
global gVMove, gHMove

on beginSprite me
gVMove = random(4) + 2
gHMove = random(4) + 2
end beginSprite

on enterFrame me
tBallV = sprite(me.spriteNum).locV
tBallH = sprite(me.spriteNum).locH
if tBallV > 266 or tBallV < 0 then
bounce("v")
end if
if tBallH > 366 or tBallH < 0 then
bounce("h")
end if
if tBallV > 87 and tBallV < 161 and tBallH > 99 and tBallH < 260 then
if tBallV > 91 and tBallV < 157 then
bounce("h")
else
bounce("v")
end if
end if
sprite(me.spriteNum).locV = tBallV + gVMove
sprite(me.spriteNum).locH = tBallH + gHMove
end enterFrame

on bounce arg
case arg of
"v": gVMove = 0 - gVMove
"h": gHMove = 0 - gHMove
end case
end bounce
--

Kenneth Kawamoto

http://www.materiaprima.co.uk