Scratch

That seems rather complicated.
But if you plan to achieve it, then upload what you have of your project so far so that we can see.

You can consider adding some other kid of color onto the walls. One that is not used anywhere else in your project. Maybe a shade you don't use or something. Use that and then create a script where the player stops when it touches that color.
That could be a way of doing it.

But from my perspective, what you are trying to achieve sounds very complicated.
Hope this helped and hope you do good on your project!

SOScratch, you must have posted while i was typing, because i didn't see your reply till i posted. The problem is, i don't know how to get it to stop anywhere, colours, i'm assuming must be the most basic, but if i want it to stop, i can't get it to start afterwards. Also, the person has to stop moving when particular parts of his body touch the walls, as he would be miles short of the top wwall especially, if it was all of him effected.

AtomicBawm3 wrote:

It's not as hard as you think I'm pretty sure...You just have to create two more sprites: A shadow of the main character, and a hidden (ghost =100) sprite that is the exact shape of the ground of the map.  These two sprites do the collision testing instead of the others...that way, when you program jumping, it'd doesn't affect your collision sprite...if that's not enough to go off, please tell me 

Yeah, but Java does not tolerate collision of completely ghosted sprites. I believe Paddle2SeeFixIt tested it out in one of his projects.

AtomicBawm3 wrote:

chanmanpartyman wrote:

AtomicBawm3 wrote:

It's not as hard as you think I'm pretty sure...You just have to create two more sprites: A shadow of the main character, and a hidden (ghost =100) sprite that is the exact shape of the ground of the map.  These two sprites do the collision testing instead of the others...that way, when you program jumping, it'd doesn't affect your collision sprite...if that's not enough to go off, please tell me 

Yeah, but Java does not tolerate collision of completely ghosted sprites. I believe Paddle2SeeFixIt tested it out in one of his projects.

The shadow wouldn't need to be, it could just be a literal shadow in the game.

Oh, so like ghost=50 or something along the lines of that?

AtomicBawm3 wrote:

chanmanpartyman wrote:

AtomicBawm3 wrote:

The shadow wouldn't need to be, it could just be a literal shadow in the game.

Oh, so like ghost=50 or something along the lines of that?

Or not even.  It could just be solid.  Or you could have the character sprite switch a sensor, do the sensing, then switch back to the character.

I see. I used to do the color sensor to where you couldn't see it because it switched to the visual at the end of the frame. Now I use:

when gf clicked
forever
 if <key [right arrow v] pressed?>
  change [xvel v] by (1)
 end
 if <key [left arrow v] pressed?>
  change [xvel v] by (-1)
 end
 set [xvel v] to ((xvel) * (.87))
 change x by (xvel)
 if <touching [level v]?>
  change y by (([abs v] of (xvel)) + (1))
  if <touching [level v]?>
   change y by ((0) - (([abs v] of (xvel)) + (1)))
   change x by ((0)-(xvel))
   set [xvel v] to ((xvel) / (2))
  end
 end  
 if <key [up arrow v] pressed?>
  change y by (-1)
  if <touching [level v]?>
   set [yvel v] to (10)
  end
  change y by (1)
 end
 if <(yvel) < [3]>
  change y by (-1)
  if <not<touching [level v]?>>
   change [yvel v] by (-1)
  end
  change y by (1)
 end
 set [yvel v] to ((yvel) * (0.9))
 change y by (yvel)
 if <touching [level v]?>
  change y by ((0) - (yvel))
  set [yvel v] to ((yvel) / (2.5))
 end
end