I am still working on my tank game and thanks to help from fellow scratchers, I managed to make the tank shoot in the correct direction. But now I need help with walls. Simple wall scripts don't work because the tank can reverse and hit the walls with different sides so please help. Here is the link for the game I am talking about. If the link doesn't work, just click my name and click the tank battle project.

https://scratch.mit.edu/projects/156889896/#player
Copy this link in the url bar.

In the player sprite you have two problems. You can collide with the wall by moving forwards or backwards so you need to reverse that movement if a collision occurs. But you can also collide with the wall by rotating left or right so you also need to reverse the rotation if a collision occurs -

when green flag clicked
forever 
  set [Speed v] to [0]
  if <key [up arrow v] pressed?> then 
    change [Speed v] by (-3)
  end
  if <key [down arrow v] pressed?> then 
    change [Speed v] by (3)
  end
  move (Speed) steps
  if <touching [Sprite4 v] ?> then 
    move ((0) - (Speed)) steps
  end
  set [Turn v] to [0]
  if <key [right arrow v] pressed?> then 
    change [Turn v] by (3)
  end
  if <key [left arrow v] pressed?> then 
    change [Turn v] by (-3)
  end
  turn cw (Turn) degrees
  if <touching [Sprite4 v] ?> then 
    turn ccw (Turn) degrees
  end
  if <<(Tank Health) = [0]> or <(Tank Health) < [0]>> then 
    broadcast [Player Dead v] and wait
  end
end

In the player's turret you were rotating manually to match the player direction by checking for the left or right arrow keys. But now that we can stop the rotation if there's a collision, the turret would still rotate if the arrow keys were pressed. So we need to change the code so that the direction of the turret is stored as a delta angle to that of the tank -

when green flag clicked
forever 
  if <key [a v] pressed?> then 
    change [Gun Delta v] by (-3)
  end
  if <key [d v] pressed?> then 
    change [Gun Delta v] by (3)
  end
  point in direction (([direction v] of [Evader PL-1 (Player) v]) + (Gun Delta))
  if <key [space v] pressed?> then 
    switch costume to [costume1 v]
    repeat (4) 
      wait (0.03) secs
      next costume
    end
    broadcast [Fire v]
    wait (0.8) secs
  end
end

You now have the issue of the turret jumping after firing a bullet if the player has continued turning. There are several ways to solve that but I'll leave that with you

The frame sprite (Sprite4 in project) is that who is making issue. You will need this script in Sprite4 sprite:

when green flag clicked
forever
if <<touching [tank hull v] ?> or <touching [tank turret v] ?>> then
broadcast [touching wall v]

end

I even think you should remove Sprite4 because it is used for nothing - you better draw it in Stage

Sprinternet wrote:

The frame sprite (Sprite4 in project) is that who is making issue. You will need this script in Sprite4 sprite:

when green flag clicked
forever
if <<touching [tank hull v] ?> or <touching [tank turret v] ?>> then
broadcast [touching wall v]

end

I even think you should remove Sprite4 because it is used for nothing - you better draw it in Stage

yes

This is a very simple way of making non-go through walls! check it out!

https://scratch.mit.edu/projects/1142284005/

67