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[Rat Casket]

Just as the title says. How would one make a jump that increases in height as the button is pressed, and has a shorter jump when the button is just tapped?

I understand the logic behind it but I'm not sure how to translate that into code.

Current jump code:

Code:

if (jump) && (onGround){
     ySpeed = -10;
}else{
     ySpeed += gravSpeed;
}

Now this works just fine for a set jump height but I'm not sure what needs to be tailored to do a Mario style jump.

[Ant]

You reduce the vertical speed when the button is released. So something like:

Code:

if keyboard_check_released(vKey_Jump) and vspeed < 0 {vspeed /= 2;}

[Rat Casket]

Ah, so will I need to change my jump code from keyboard_check(button) to keyboard_check_pressed(button) ?

[Ant]

Yeah the initial jump code should really only be on the keyboard_check_pressed. The regular keyboard_check returns true every single step if the key is pressed, probably won't make much difference in your case but best to be on the safe side to avoid bugs later on.

[Rat Casket]

*success*

[Fallsburg]

Little bit redundant since you figured it out, but here's a good page on exactly what is going on behind the scenes with Mario's jumping.

I will say, instead of just reducing speed, here is what I do.

Code:

gravity = default_gravity
if JUMP_PRESSED && vy > 0  //Assumes up is positive y
   gravity *= gravity_reduction_factor

vy -= gravity*dt

y = vy*dt

This only allows the player to control the height of the jump on the way up (instead of allowing them to control gravity on the way down as well [which feels wrong if they can slow down gravity after falling off of something]).

[Rat Casket]

That is pretty awesome. I haven't really played Mario in... years so I totally forgot about that. Awesome article and I'm going to test out this code of yours.

What is limiting the height of the jump there?