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Johnny Look

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14th July, 2009 at 22:03:12 -

I have a function meant to be accessed by MMF2 inside a while loop, but for some reason all it does is making the game stop responding.
The function is meant to make the player go forward by a number of pixels specified by the parameters of the functions.

here's the code btw:


createobject("object","ball.png");

loop=1

while loop==1 do

moveobject("object",1,0);

end


 
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Pixelthief

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14th July, 2009 at 22:13:32 -

theres no terminating condition to your loop, so its just repeating infinitely
after the stack is large enough, the game simply crashes

try this:
function createobject(distance)
for loop=1,distance, do
moveobject(1,0);
end
end

if you look at your code, theres nothing that sets loop to anything but "1". So each time it compares loop == 1, it is true, and the loop keeps going. With a For structure, it increases by 1 each iteration, from 1 to X

 
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Johnny Look

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14th July, 2009 at 22:17:51 -

mmmh thanks but I need the infinite loop so that inside that loop I can check for player input.
Unless there's another way, my Lua knowledge is fairly limited.

edit: I just realized that I can't even do math operations inside the loop, jeez basic does give bad habits.

Edited by Johnny Look

 
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Pixelthief

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14th July, 2009 at 22:37:06 -

you should probably structure your code so that you don't need wait functions

when a programming language does an infinite loop, it doesn't wait for input, or run the event once per frame, etc. It will attempt to call the move function an infinite numbers of times all at once, which will of course instantly crash your program. Instead you should structure your code so that it calls the move function each time you need to move, not so that it waits for input in the middle of the loop.

 
Gridquest V2.00 is out!!
http://www.create-games.com/download.asp?id=7456

Johnny Look

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14th July, 2009 at 23:44:48 -

yeah well, but how ?

thanks a bunch for the help so far btw

 
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Johnny Look

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15th July, 2009 at 01:02:15 -

nevermind got it sorted out, I only had to create a loop inside mmf instead of lua.

 
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UrbanMonk

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15th July, 2009 at 04:46:54 -

mmf does it again!

 
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