On 16-jan-2006, at 15:51, Michael Nadel wrote:
This question has been plauging me for a long time and I'm sure
there must be a simple answer. Is there a way to make a repeat loop
to make a sprite grow and shrink in a way that will maintain
proportions? In other words, it's easy to make a perfect box grow
in size, but how do you make a rectangle grow and keep it's
proportions while it grows? This is my code, but it doesn't work.
repeat while (mySprite.height < member(mySprite.member).height) and
(mySprite.width < member(mySprite.member).width)
mySprite.height = mySprite.height + 5
mySprite.width = mySprite.width + 5
updatestage
end repeat
You're adding the same amount to both height and width, this will
distort the box.
The best way would be to multiply height and width with the same
factor. However in order to do that you need to make sure that the
factor by which you multiply will not be truncated to an integer. Use
the float() function to prevent this.
Like this:
repeat while ...
mySprite.height = mySprite.height * float(1.1)
mySprite.width = mySprite.width * float(1.1)
end repeat
(i haven't actually tested this, you may even need to do:
mySprite.height = float(mySprite.height) * float(1.1)
etc.
This will enlarge the sprite 10% proportionally each repeat step.
Be aware that using a repeat loop for this will cause your routine to
eat all available processor cycles.
If you have other stuff going on at the same time, it's better to use
the exitframe handler:
on exitFrame me
if mySprite.height < mySprite.member.height then
mySprite.height = mySprite.height * float(1.1)
mySprite.width = mySprite.width * float(1.1)
end if
end
To make the sprite oscilate between large an small sizes, you have to
add more code
Mark Hagers
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