I'm using box2d
and making game.  It has a very fast object
So I'm going to use bullet. 
example, 
local body = self.world:createBody{type = b2.DYNAMIC_BODY, 
									   position = {x = self.ball:getX(), y = self.ball:getY()},
									   angle = self.ball:getRotation() * math.pi/180,
									   bullet = true, 
									   active = true}
that is. 
but, Objects that are still passing through the wall.
What is the problem? Please answer : )
ps. i'm Korean, So my English is Terrible. Thank you for your understanding.
                
                
        
                     
        
Comments
can you post more specific code, for example, how you create other objects.
Or even better post a small example we could try