Scratch

Newer tutorials: Testing if something is a string or a number. (12-Feb-19)

INTRO: This is the first of a series of step-by-step tutorials made for anybody who needs help with their projects, either to make them or to increase their quality. These tutorials also help inspire new projects and new ideas. Lastly, these tutorials take advantage of the fancy new forum blocks made by JSO. Enjoy! 

Wall Jumping

NOTE: This method does not work for scrollers.

Step 1: Make three variables.

(xv)
(-xv)
(yv)

Step 2: Make a sprite that looks like this:

If you can't see the image, see here.
Name this sprite "sensor". (You don't have to, but it helps to.)

Step 3: Now, make a new sprite and call it "character". (Again, not necessary, but it helps.) Make this roughly the same size as your sensor sprite.

Step 4: Put this script in it:

when flag clicked
forever
go to [sensor v] //The name of your other sprite

Step 5: Make two scripts in the sensor sprite.

This is for basic movement:

when flag clicked
set [xv v] to [0]
set [-xv v] to [0]
forever
set [ghost v] effect to (100)
if <key [right arrow v] pressed?> //Or the key to press to move right
change [xv v] by (1) //Adjustable - makes the character move faster/slower
end
if <key [left arrow v] pressed?> //Or the key to press to move left
change [-xv v] by (1) //Should be the same as the moving right speed
end
if <key [up arrow v] pressed?> //Or the key to jump
if <color [#0000FF] is touching [#000000]?> //Substitute black with ground color for all.
set [yv v] to [20]
broadcast [jump v]
end
end
if <not <color [#0000FF] is touching [#000000]?>>
change y by (-5)
end
if <color [#FF0000] is touching [#000000]?>
set [yv v] to [0]
set [xv v] to [0]
if <<not <color [#0000FF] is touching [#000000]?>> and <not <key [up arrow v] pressed?>>>
wait (0.5) secs
if <key [up arrow v] pressed?>
set [yv v] to [20]
broadcast [jump v]
end
set [-xv v] to [10]
end
end
if <color [#00FF00] is touching [#000000]?>
set [-xv v] to [0]
set [yv v] to [0]
if <<not <color [#0000FF] is touching [#000000]?>> and <not <key [up arrow v] pressed?>>>
wait (0.5) secs
if <key [up arrow v] pressed?>
set [yv v] to [20]
broadcast [jump v]
end
set [xv v] to [10]
end
end
change x by (xv)
change x by ((0) - (-xv))
change [xv v] by ((xv) * (-0.2))
change [-xv v] by ((-xv) * (-0.2))

And one for jumping:

when I receive [jump v]
repeat (10)
if <color [#FFFF00] is touching [#000000]?>
set [yv v] to [0]
stop script
end
change y by (yv)
change [yv] by (-1)
end
set [yv v] to [0]

You're done!

If you find any way to improve on the scripts above, please reply.

Last edited by 360-International (2012-02-19 20:11:00)