[TUTORIAL] Make marble game ball jumpable

[pixel_legolas]

Here is a pdf with information on how to modify the marble game files so you make the ball jumpable. I hope there is no mistakes in it because I did it at work when I had nothing to do and didn't have access to GC But has worked at home so far.

Happy jumping

[LutinMalefique]

thanks pixel but two mistakes

Code:

if (doJump)
        {             
            ball.AddForce( Vector(lookLeftRight, JUMP_FORCE, 0));
            ball.SetGravityEnabled( true);
        }
        doJump = false; 

"lookLeftRight" is not use in this script so replace it by 0
and " ball.SetGravityEnabled( true);" doesn't work so don't use it.

I haven't  try to change the"infinite jump effect" but it's funny, you can complete the level in 3 seconds 

[pixel_legolas]

thanks for this, but with those lines it seems to work with my template, but all corrections are good I might try to do the onGround thingy later on but for now the infinite jump is quite fun as you say

There is also no death height witch is strange on such an open stage

[pixel_legolas]

I am trying to modify the script so it checks weather we are on the ground or not so we can only jump once before we land.

I am able to get the script working...once, so he jumps once and then stops and can't get him to jump again.

I have marked the script with
//////////////////////////////////////////////////////////////
where I have pasted some code so perhaps someone can look at it?

[LutinMalefique]

i'm looking at it

the first thing i see is your variable "floatOffGround = ball.GetCenter().y", it is useless. To know if your onGround or not  just look the distance of the raycast. if it's more than a certain value, your are in the air and you can't jump.

[LutinMalefique]

ok found, i will post the new file in a few minutes

PS : it's not perfect, need more work 

[LutinMalefique]

now the ball can jump more than once but also when she is in the air
so need more work (raycast problem)


PS:there is indeed a raycast problem, from the moment the ball moves, it is no longer active.
Do a Ctrl+X and Ctrl+C in the game, you can see the raycast, if you don't move the ball, the raycast strikes the ground but when she moves, the ray is not in contact with the ground.

[LutinMalefique]

ok i stop here for today, my script does not work but i have a clue, you use CollisionCallback to check if the ball strikes the ground (name your ground object "ground" for exemple and if the ball is in contact with it, you can jump)

good luck

[pixel_legolas]

thanks for all the help, it is 1am here now so need to sleep but will look at it. The code I have taken is from the network_character.gsl and the player can jump, not good but can jump, so should be possible with same codes like ball.getcenter etc.

Strange