var camera_switch = 1;

function camera_invehicle()
{  while(1)
   {  if(camera_switch == 2)
      {   camera_invehicle code here   }
      wait(1);
}  }

function camera_outvehicle()
{  while(1)
   {  if(camera_switch == 1)
      {   camera_outvehicle code here   }
      wait(1);
}  }

action player()
{  camera_outvehicle();
   camera_invehicle();
   while(1)
   {  if (player.x != vehicle.x)   {   camera_switch = 1;   }  // the player is NOT in the vehicle
      else                         {   camera_switch = 2:   }  // the player IS in the vehicle
      wait(1);
   }
}

action player()
{  while(1)
   {  if (player.x != vehicle.x)
      {   camera_outvehicle code here   }   // the player is NOT in the vehicle
      else
      {   camera_invehicle code here    }   // the player IS in the vehicle
      ///other stuff in here if you want...
      wait(1);
   }
}