How do you make a sprite jump in the air(like in mario)?

cs641311

How do you make a sprite jump in the air like mario
This is what I have been doing:

when [ up arrow] key pressed

point in direction ( up)

move (100) steps
wait (.5) secs

point in direction ( down)

move (100) steps

point in direction ( right)

Last edited by cs641311 (Jan. 30, 2017 17:29:21)

learncsscratch

Actually jumping looks a lot better if you simulate gravity…

Check this out for a coding example

There is also a Mario game that uses the same algorithm Here

FiveCubed

See how this works:

when gf clicked
set [i v] to (10)
repeat (10)
change y by (i)
change [i v] by (-1)
end
repeat (10)
change y by ((0) - (i))
change [i v] by (1)
end

cs641311

Thanks

HurculesAnimator

when green flag clicked
go to x: (0) y: (0)

glide (1.0) secs to x: (0) y: (7)

glide (1.0) secs to x: (0) y: (0)

KittyHawk1

when [ v] key pressed

change y by ()

cs641311

FiveCubed wrote:

See how this works:

when gf clicked
set [i v] to (10)
repeat (10)
change y by (i)
change [i v] by (-1)
end
repeat (10)
change y by ((0) - (i))
change [i v] by (1)
end

Actually,the last repeat is repeat 11 times not ten.

Deftonestef

when green flag clicked forever if key up or space pressed repeat 10 change y by number (optional) repeat 10 change y by -number (optional)

MasterMatt50

Reeeee

noob159

Deftonestef wrote:
when green flag clicked forever if key up or space pressed repeat 10 change y by number (optional) repeat 10 change y by -number (optional)

Do you mean

when green flag clicked
forever
if <key [up arrow v] pressed?> then
repeat (10)
change y by (optional)
end
repeat (10)
change y by (optional)
end
end
end

And dont forget left and right movment

when green flag clicked
forever
if <key [right arrow v] pressed?> then
change x by (optional)
end
end

when green flag clicked
forever
if <key [left arrow v] pressed?> then
change x by (optional)
end
end

Atari765

I encourage you to research Acceleration and Velocity, all games use this concept to emulate jumping, running, falling, etc.

https://www.youtube.com/watch?v=I16utd8d6JM&vl=en
https://www.youtube.com/watch?v=JLm3JrCPtWs&feature=youtu.be
https://www.youtube.com/watch?v=0kQrz4dfxDw&feature=youtu.be

I've provided three videos above that my physics teacher sent out to us, they explain the concept well and will hopefully give you an understanding of how to make your character jump.

Here's the basic logic
Variables
1.) Acceleration = -9.81 (the magnitude of gravity)
2.) Velocity = 0 (the rate at which your character moves)

When (jump)
Velocity = 15 (this would be your starting velocity)
Velocity += acceleration (drags character down due to gravity)

if colliding with floor
Velocity = 0 (acceleration doesn't change)

Asteroids9

The I in the change y by?

Last edited by Asteroids9 (April 4, 2020 03:08:57)

Asteroids9

What is I

Eoxygen

Platformer scripts:

 WITH WALL JUMPING

when green flag clicked 
go to x: (-200) y: (0)
forever
broadcast [tick v]
when I receive [tick v]
if <key [right arrow v] pressed?> then
change [Xv v] by (1)
end
if <key [left arrow v] pressed?> then
change [Xv v] by (-1)
end
change x by (Xv)
set [Xv v] to [((Xv) * (0.88))]
change [Yv v] by (-1.3)
if <touching [platforms v] ?> then
repeat (1)
change y by (1)
end
end
if <touching [platforms v] ?> then
change x by ((Xv) * (-1))
if <key [up arrow v] pressed?> then 
set [Yv v] to [14.5]
if <(Xv) > [0]> then 
set [Xv v] to [-7]
else
set [Xv v] to [7]
end  
else
set [Xv v] to [0]
end
end
change y by (Yv)
if <touching [platforms v] ?> then
change y by ((Yv) - ((Yv) * (2)))
end
if <<key [up arrow v] pressed?> and <touching [platforms v] ?>> then
set [Yv v] to [15]
end
end

Eoxygen

CHECK MY "THE WHITE WINDFALL" PLATFORMER AND USE THE SCRIPT
ALSO LOVE, FAVE, AND FOLLOW!!

Eoxygen

when I receive [MJM3 has 500 followers v]
repeat (5+ years)
MJM3 is the best coder on Scratch!!
end

Eoxygen

Platformer scripts:
WITH
WALL
JUMPING
when
clicked
go
to
x:
-200
y:
0
forever
broadcast
tick
when
I
receive
tick
if
key
right arrow
pressed?
then
change
Xv
by
1
if
key
left arrow
pressed?
then
change
Xv
by
-1
change
x
by
Xv
set
Xv
to
((Xv) * (0.88))
change
Yv
by
-1.3
if
touching
platforms
?
then
repeat
1
change
y
by
1
if
touching
platforms
?
then
change
x
by
Xv
*
-1
if
key
up arrow
pressed?
then
set
Yv
to
14.5
if
Xv
>
0
then
set
Xv
to
-7
else
set
Xv
to
7
else
set
Xv
to
0
change
y
by
Yv
if
touching
platforms
?
then
change
y
by
Yv
-
Yv
*
2
if
key
up arrow
pressed?
and
touching
platforms
?
then
set
Yv
to
15
end

Asteroids9

Actually make it Change I by 1

cookiemonster984

thanks you,this was very helpful for my upcoming platformer (please look for it,it will be called scratch run-part one)

Paigeri

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