Scratch

Wall jumping assuming you have a sensor costume would be

forever
if <color [#00FF00] is touching [#FFFFFF]?>
if <<key [up arrow v] pressed?> and <key [left arrow v] pressed?>>
set [xvel v] to (4)
set [yvel v] to (7)
//this is for the right hand side, you'd use the right sensor for the left jump
//and negative numbers.
//green would be the top left sensor, and white would be your 
//wall colour
//

Last edited by zammer990 (2012-08-08 09:02:22)

BirdByte wrote:

You can use this script for x movement:

when gf clicked
set [xvel v] to [0]
forever if <not <<key [right arrow v] pressed?> and <key [left arrow v] pressed?>>>
 if <key [left arrow v] pressed?>
  change [xvel v] by (-0.8) //Movement gain speed, must be negative
 end
 if <key [right arrow v] pressed?>
  change [xvel v] by (0.8) //Same as above, but not negative
 end
 change x by (xvel)
 set [xvel v] to ((xvel) - ((xvel) * (0.08))) //Friction, increase for faster stop
end

I just noticed quite a few bugs here. Try this instead:

when gf clicked
set [xvel v] to [0]
forever
 if <not <<key [right arrow v] pressed?> and <key [left arrow v] pressed?>>>
  if <key [left arrow v] pressed?>
   change [xvel v] by (-0.8) //Movement gain speed, must be negative
  end
  if <key [right arrow v] pressed?>
   change [xvel v] by (0.8) //Same as above, but not negative
  end
 end
 change x by (xvel)
 set [xvel v] to ((xvel) - ((xvel) * (0.08))) //Friction, increase for faster stop
end

zammer990 wrote:

Wall jumping assuming you have a sensor costume would be

forever
if <color [#00FF00] is touching [#FFFFFF]?>//green would be the top left sensor, and white would be your wall color
if <<key [up arrow v] pressed?> and <key [left arrow v] pressed?>>//this is for the right hand side, you'd use the right sensor for the left jump and negative numbers.
set [xvel v] to (4)
set [yvel v] to (7)

Fixed. 

Does not work.

Is it okay to remove if key right arrow/left arrow move x. I have a solid objects script and the x movement is crucial for it to work. Will it work without this?

How will it effect the wall jumping.

With the platform script I have Y must be over zero to jump. What should I do?

MoreGamesNow wrote:

This was my answer to a question for "a wall jumping script without sensors":

when gf clicked
forever
if<key [right arrow v] pressed?> // increase velocity if right key pressed
change [x-vel v] by (0.2)
end
if<key [left arrow v] pressed?> // decrease velocity if left key pressed
change [x-vel v] by (-0.2)
end
change x by (x-vel) // move sprite by x-velocity
if<touching [wall/floor v]?> // if sprite collides with wall
set [x-vel v] to ((-0.5)*(x-vel)) // bounce off
change x by (x-vel)
if<touching [wall/floor v]?>
change x by (x-vel)
end // after bouncing off the wall...
if<<key [up arrow v] pressed?> and <(y-vel) < (0)>> // see if you should wall bounce
set [y-vel v] to (3)
if<(x-vel) > (0)>
set [x-vel v] to (2)
else
set [x-vel v] to (-2)
end
end
end
change [y-vel v] by (-0.2) // gravity
change y by (y-vel) // move sprite along the y-axis
if<touching [wall/floor v]?> // if touching wall/floor
set [x-vel v] to ((0.94)*(x-vel)) // friction
set [y-vel v] to ((-0.5)*(y-vel)) // bounce
change y by (y-vel)
if<touching [wall/floor v]?>
change y by (y-vel)
end
if<<key [up arrow v] pressed?> and <(y-vel) > (0)>> // jump
set [y-vel v] to (4)
end
else
set [x-vel v] to ((x-vel)*(0.98)) // friction in the air (not on the ground)
end

Edit: added comments

It works Great even with the floor and the walls the same color! Thanks!