Hey hey, me again, bouncing balls?

[Jason]

Hi,

So I'm stuck with something else which is REALLY annoying and I need help...

Basically, you play as, a ball shaped object, and instead of moving like a normal platformer, you know, stuck to the floor walking left and right, I want the ball to bounce.

I've tried making an animation of it bouncing, but this doesn't look right at all, I'd rather have a full functioning bouncing ball.

You might think "Just use the bounce drag and drop tool!", I've done this, but for example, if you're holding right, bounce off a platform and hit another, it carries on bouncing to the right, even when you hold it on left, it's like trying to fight against the wind, you can feel it TRYING to move to the left, but stuck in the course of moving to the right.

I'd like to know if there's a proper way of making a bouncing object like this, as it would really help me.

Another thing that would be incredible if I could get it to work, is if you hold the down button, it slams you to the floor (Obviously), but makes you bounce higher, as it would be required for specific areas.

Also (This is sounding huge, I'm sorry about it!), is there a way to make the bounces gradually get smaller and smaller? So the ball gradually loses height on its bounces unless the down button is pressed to increase it.

Thankyou!

 

[No ID]

did you try doing it as a collision event? if so what did you do exactly?

 

[Jason]

Basically:

On collision with objFloor (That was the event)
Bounce precise.

I mean, the bouncing works, but I can't take control of the object once it's bouncing... it bounces and doesn't stop, if I try moving left, it just carries on bouncing in whatever direction it was going anyway.

 

[No ID]

hmmm..did you try Jumping to position relative to x?

 

[Jason]

Yeah, tried that...

Any other ideas? :P

 

[No ID]

i got nothing. maybe a check collision block? :blank:

 

[Jason]

Why would that have anything to do with the direction anyway? I try moving while in midair after the bounce, lol...

 

[No ID]

i don't know but if you do get it let me know how you did it exactly because I would like to know.

 

[Jason]

Will do, chief.

 

[OS]

This is easier than it looks. Just set your vspeed equal to your jump height (a NEGATIVE number) in your collision event. I suggest making sure that the collision is underneath you, and then do a check for left|right to prevent moving through walls sideways.

Here is the code I just wrote up that works nearly perfectly (assuming there are no sideways walls):

 

Information about object: ball

 

Sprite: spr_ball

Solid: false

Visible: true

Depth: 0

Persistent: false

Parent: <no parent>

Mask: <same as sprite>

 

Create Event:

execute code:

 

gravity = 0.5;

 

 Step Event:

execute code:

 

UP = keyboard_check(vk_up);

DOWN = keyboard_check(vk_down);

LEFT = keyboard_check(vk_left);

RIGHT = keyboard_check(vk_right);

 

hspeed = (RIGHT - LEFT) * 5;

 

Collision Event with object solid:

execute code:

 

vspeed = -10;

 

My solid object is just named solid. It works great. Just do some work to make it so that if you wait too long before pressing down your jump speed decreases. I suggest using a variable staring at 10 and in the collision event say | vspeed = -jump_height | or something similar.

Hope this helps.