Ease in out camera script

class myscroll:
	def __init__(self):
		self.acceleration=100;		
		self._ax=0;	self._ay=0
		self._vx=0;	self._vy=0

	def __call__(self, obj):
		myscrollx=(System.ScrollXLeft+System.ScrollXRight)/2
		myscrolly=(System.ScrollYTop+System.ScrollYBottom)/2

		# x motion
		diff=obj.X-myscrollx
		if abs(diff)<1:
			self._ax=0;  self._vx=0
		else:
			if self._vx**2/(2*self.acceleration) >= abs(diff):
				self._ax=-1*cmp(self._vx,0)*self.acceleration
			else:
				self._ax=cmp(diff,0)*self.acceleration

		# y motion
		diff=obj.Y-myscrolly
		if abs(diff)<1:
			self._ay=0;  self._vy=0
		else:
			if self._vy**2/(2*self.acceleration) >= abs(diff):
				self._ay=-1*cmp(self._vy,0)*self.acceleration
			else:
				self._ay=cmp(diff,0)*self.acceleration

		self._vx+=self._ax*System.TimeDelta
		self._vy+=self._ay*System.TimeDelta
		System.ScrollX(myscrollx+self._vx*System.TimeDelta)
		System.ScrollY(myscrolly+self._vy*System.TimeDelta)
myscroll=myscroll()[/code:2fwplqvv]
No need to understand how it works, just have that script run at the "start of layout" and call "myscroll(Sprite)" every tick.  The only setting is acceleration, which can be changed at any time with the script "myscroll.acceleration=400".

Basically what it does is accelerate the camera to the object and then decelerate so that when the screen arrives at the object the camera speed will be zero.

Example of use: [url]http://dl.dropbox.com/u/5426011/examples/camera%20easeinandout.cap[/url]
req at least 0.99.84

Feel free to use or enhance.