Hi,
 
	I would like to modify time scale in a 2D physics engine. I searched about it, and matter.js seems to permit timescale modification.
 
	In addition, i would like to set 'different timescales' for different bodies (as example: 2 object fall, one will be set to timescale:1 and the other timescale:0.5. So this last one will fall 2x slowly)
 
	It sound nonsense, but is there a trick to do it?
 
	I thouth about saving positions on last step, and compare them to the new one, then replacing them with a homothety value relative to the timescale. But there is a lot of cases that this can't handle
 
	Any sugestions?  
	Thanks