Camera rotating in minecarts

I built some rollercoasters in the game but people didn't see the decorations because if the minecart enters a curve or a slope, the camera doesn't move with the minecart. It always looks forward until the player uses the mouse/joystick to look around. Please make the player camera always rotate if the minecart rotates like: Player looked to the left of the minecart. The cart did a right turn. The player looks to left of current minecart position. (It is the forward of its old, before-turn position.)