when green flag clicked
set [sv_gravity] to [0]
wait (10) secs
set [sv_gravity] to [1]
if <[sv_gravity] = [1]> then
add [gravity] to [cheats]

end
if <[cheats] contains [gravity] ?> then
say [This is gravity cheat]

end

ReadHowToMakeTheGame wrote:

I need to make the game with jump but I don't know how to make it

when [up arrow v] key pressed
change y by (10)
change y by (-10)

ReadHowToMakeTheGame wrote:

I need to make the game with jump but I don't know how to make it

when green flag clicked
set [ y velocity] to [0]
forever
change [ y velocity] by (-1)
change y by (y velocity)
end

born_2010 wrote:

ReadHowToMakeTheGame wrote:

I need to make the game with jump but I don't know how to make it

Although I'm not sure if this is what you need, this is how I usually create gravity scripts in Scratch:
First, I start with a variable called “y velocity,” and set it to 0 at the beginning.
After that, I make a forever loop, and inside it I place a ‘change y velocity by -1’ block.
Right below that block I place a ‘change y by y velocity’ block.
The script should look similar to this:

when green flag clicked
set [ y velocity] to [0]
forever
change [ y velocity] by (-1)
change y by (y velocity)
end

This is the core of the program, as without it you cannot have realistic gravity. After you make this, you may wish to add a component that makes the player collide with the ground when they land on it. If so y velocity should be set to 0 when they touch the ground so that they stop falling. Something else you might want to consider is jumping. If you want to make the player jump, you should probably just set y velocity to a positive number like 15 when they press the jump key. This will make them move up instead of down. If you want to make them fall faster or slower, change the “-1” in the script to something larger or smaller. Either way, there are multiple different things this script can be used for that involve gravity, so this should probably be useful no matter what you are working on.
I hope this helps!

if <touching [ground v] ?> then
change y by ((y velocity) * (0))
end

if <key [ up arrow] pressed?> then
change [ Y velocity] by (10)
end

when green flag clicked
set [yvelocity v] to [0]
forever
change [yvelocity v] by (-1)
if <(canJump?) = [1]> then
set [yvelocity v] to [10] // You can change this number to make the jump height higher or lower
end
change y by (yvelocity)
if <touching [ground v] ?> then 
Ground Collisions :: custom
  

else
set [canJump? v] to [0]
end
end

define Ground Collisions
repeat until <not <touching [ground v] ?>>
change y by ((-1) * ((yvelocity) / ([abs v] of (yvelocity))))
end
if <(yvelocity) < [0]> then // If the player was coming out of a ground collision, set canJump to 1.
set [canJump? v] to [1]

else
set [canJump? v] to [0]
end
set [yvelocity v] to [0]

when green flag clicked
set [Gravity v] to [1]
forever
change [Gravity v] by (1)
change y by ((0) - (Gravity))
end

Create-Scratch101 wrote:

There is a good wiki article: Simulating Gravity

ReadHowToMakeTheGame wrote:

when green flag clicked
set [sv_gravity] to [0]
wait (10) secs
set [sv_gravity] to [1]
if <[sv_gravity] = [1]> then
add [gravity] to [cheats]

end
if <[cheats] contains [gravity] ?> then
say [This is gravity cheat]

end

HogwartsTeacherSnape wrote:

ReadHowToMakeTheGame wrote:

Rickrolled, yea

tank401 wrote:

Love how you come into a forum to say someone is wrong, ignoring the guy who wants help

ItBeJC wrote:

Everybody here has given part of a fully functional jumping script, but not the full script.

(Currently editing this post to include scripts)

EDIT: Forgot to include ceiling collisions. Its included now.

when green flag clicked
set [yvelocity v] to [0]
forever
change [yvelocity v] by (-1)
if <(canJump?) = [1]> then
set [yvelocity v] to [10] // You can change this number to make the jump height higher or lower
end
change y by (yvelocity)
if <touching [ground v] ?> then 
Ground Collisions :: custom
  

else
set [canJump? v] to [0]
end
end

define Ground Collisions
repeat until <not <touching [ground v] ?>>
change y by ((-1) * ((yvelocity) / ([abs v] of (yvelocity))))
end
if <(yvelocity) < [0]> then // If the player was coming out of a ground collision, set canJump to 1.
set [canJump? v] to [1]

else
set [canJump? v] to [0]
end
set [yvelocity v] to [0]

Keep in mind these scripts can be optimized but they should work for your needs. Also make sure to tick “Run Without Screen Refresh” on the custom block or it will not work correctly.

ReadHowToMakeTheGame wrote:

I need to make the game with jump but I don't know how to make it

when green flag clicked
set [y_vel whatever you want to name it is fine v] to [0]
forever
change y by (y_vel whatever you want to name it is fine)
change [y_vel whatever you want to name it is fine v] by (0)
if <key [space v] pressed?> then
set [y_vel whatever you want to name it is fine v] to [12]
end
end