My parent scripts look for open sprite channels within a given range,
and pick the first free sprite channel to assign the object to, so
basically it can support any number of instances of the object up to the
amount the repeat loop supports.
I create the balls like this: the ball_script is pasted below too
repeat with x = 1 to 5
s=script("ball_script").new() -- create a ball object
s.mysprite.loc = point(random(800),random(600)) -- set the location
of the ball
end repeat
If I type put s.mySprite in the message window I get a property not
found error.
Here is the ball script:
****************************************************
property mysprite, Vspeed, Hspeed
on new me
repeat with x = 150 to 200
if sprite(x).puppet = false then exit repeat
end repeat
Vspeed = random(13)-7
Hspeed = random(13)-7
mysprite = sprite(x) -- first free sprite channel found in the repeat
loop above
mysprite.puppet = true -- link needs control of the sprite channel
first
mysprite.member = "ball" -- what does this sprite look like?
mysprite.ink = 8 -- ink mode of the sprite
(the actorlist).add(me) -- adds this instance to the actorlist
return me
end
on stepframe me
if mysprite.locV < 0 then
Vspeed = -Vspeed
end if
if mysprite.locV > 600 then
Vspeed = -Vspeed
end if
if mysprite.locH < 0 then
Hspeed = -Hspeed
end if
if mysprite.locH > 800 then
Hspeed = -Hspeed
end if
end repeat
mysprite.locV = mysprite.locV + Vspeed
mysprite.locH = mysprite.locH + Hspeed
end
********************************************
Ok, to clarify, I don't need to do anything special to test for
intersects between bouncing balls and stationary blocks on the stage?
So I could put a nested repeat that tests all active balls against all
active blocks for collisions simply by using the sprite(x) for the
Sprite channel that the script put them in?
If you see anything wrong with my OOP methods here please correct me,
this is day 2 that I have actually been using OOP methods. I'm very
familiar with
Procedural so I can understand pretty much anything else. It's when we
get into these objects that things start to get fuzzy, but I'm learning.
Irvs OOP page helped me understand a lot, and the lab instructor at
school made it a lot clearer.
Thanks
Jeremy
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Agustín María
Rodríguez
Sent: Wednesday, May 22, 2002 7:33 AM
To: [EMAIL PROTECTED]
Subject: Re: <lingo-l> OOP question
DrEvil wrote:
> I hope my question is a little clearer this time.
Certainly it is :) So let´s answer it.
This doesn´t depends on how was the sprite created (OOP,
behavior,
score). Once that the sprite is on the stage, you can check if
intersects with another sprite normally.
if sprite 8 intersects 12 then
alert "they´re colliding"
end if
I guess that the problem is you´re not giving correctly the
number of the
sprites. I say I´m "guessing" because you don´t show us the code and
which are the values of the variables you´re using. Try to use this to
debug your code:
put variableName
So you´ll see where the error comes from. Or make it work
hardcoded at
the first moment and then use OOP, make it reusable, etc... Or answer
this things and I´ll keep on trying to help:
> s=script("ball_script").new() -- create a ball object
What does this parets script do? It puts the sprite on the
stage?
> s.mysprite.loc = point(random(800),random(600))
Is mySprite a method that returns the number of sprite of the
ball? What
happends in the message window if you write: put s.mySprite? It returns
an integer?
> Syntax:
> sprite(sprite1).intersects(sprite2)
> sprite sprite1 intersects sprite2
What are the values of sprite1 and sprite2?
> I don't know how to reference the objects in a conditional like this.
> In pretty much all the variations I have tried I get "variable used
> before assigned value" so I must not be referencing it right.
That´s why I encourage you to stop using variables at the first
moment.
Make it hardcoded: if sprite 8 intersects 12 then And so on... do it
with everything. Then go replacing that sprite numbers by variables. Use
the debugger too and see with wich values are filled the variables.
HTH, bye
--
Agustín María Rodríguez
http://www.StudioCerebral.com > Creative Roaster > Agustín
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