Jumping issue...

FanStudioUK

Hi guys,

Which is the best method to make and actor Jump and avoid a double jump (player is allowed to jump only after he touched the ground) ?

Thank you

jstrahan

Put a delay of .1 in ur jump control this should stop the double jump u came do less time but to low won't stop thee double jump

FanStudioUK

Could you be more specific please?

jstrahan

When touch
Timer after .1sec
Jump

jstrahan

I had a simmer problem with a back button if u were more than 2 levels deep it would go back 2 levels

FanStudioUK

No, it's not working like I want.... thanks anyway.

Did anyone used another method?

jstrahan

Try this make attribute jump integer 0
Rule if touch pressed change jump to 1 otherwise jump =0
rule if jump =1 timer after .1 jump routine

RondoRocket

You have to include in your rule that the actor "overlaps or collides" with your ground actor in order to jump.

FanStudioUK

I followed the Simple Jump method.

I really don't like jstrahan's method ... even if it's .1 seconds I can still feel this delay and it's annoying...

Is there any other method?

What about constraining the Linear.Velocity.Y to a variable, this way we can detect when the player is in the air so he won't be able to make a jump while in the air.

I tried this method but it's kinda buggy and I don't understand why.

I have also put a display text on the actor to see his Linear.Velocity.Y and I did see something strange: when he's on the ground the value is constantly changing from -0 to 0.... why ?

FanStudioUK

Gave it another try and it seems to work!

You just need to constrain the Linear.Velocity.Y to an integer value, so when the player is not in the air this value will be equal to 0.

This way I've added another rule:

IF jump.button is pressed
IF Linear.Velocity.Y = 0
Player can jump

Hooray!

scitunes

This has always been a problem with GS. You SHOULD be able to have a rule like this

All
rule - when overlapping with actor of type ground AND
rule- when spacebar is down

Timer 1 second
Accel at 90 to scene
speed 300.

BUT...

you will find that GS does not consistently detect that you are on the ground so 10% or so of the time you will not be able to jump at all. To me this is unacceptable.

Here's my workaround:

Create a boolean attribute self.OnTheGround

Rule in jumper
When collides with ground
change self.OnTheGround to true (1)

New rule
When self.OnTheGround is true
-----Rule when spacebar is pressed
-------Timer - 1second - Accelerate 90 to scene
-------Change self.OnTheGround to False (0)

This is not perfect. You can roll off the edge of a cliff, fall for a bit, and then jump, but it is the best solution that I have tried (I've been trying for over a year!)

Good luck!

FanStudioUK

Thank you scitunes, the method with the Linear.Velocity.Y it's working good, so I'll stick with that for now

scitunes

I'll have to try that. Just keep in mind that this will not work if you are going up or down a hill or are on a moving platform that moves up and down.

FanStudioUK

Yes you are right, but I dont have hills or moving platforms in my game

ToastKitten

@SciTunes, couldn't you do something like this to prevent the actor from jumping when it falls of the cliff

"Jumping Rule"
when actor receives event spacebar down & self.OnTheGround = true
-self.linearvelocity.y = 500

"Rule that enables jumping when on the ground and disables it in the air"
when actor is colliding with actor of type Ground
-self.OnTheGround = true
OTHERWISE
-self.onTheGround = false

This is what I did for my double jumping example, although it still allows 1 jump if you fall off of a cliff:

http://gamesalad.com/game/play/80376

scitunes

I tried that and it worked most of the time, but seemed to cause other problems (I can't remember what exactly but I remember that it forced me to try a different route).

ToastKitten

Sad face

Well if you figure out what it did I'd love to hear it. I use the method i described above and haven't found any bugs, but knowing games I know nothing is 100% bug-proof on a first attempt x]

scitunes

If I remember right I think it made it so the timer didn't seem to shut off so my character would rocket off the screen instead of only accelerating for a brief moment. When I got rid of the otherwise part of it and used the method I described above it never happened so for now I have stuck with it.

jstrahan

yea figured it may slow it down but figured it was worth a try sorry hadnt needed jump yet

ToastKitten

Wait... why are you using a timer again?

scitunes

so it only accelerates up for a short amount of time

jstrahan

My issue was on the menu u would click on instructions
On the instructions screen u had 3 options ( object, scoring,controls) with a back button at the bottom
When u click on 1 of the options say object it just changed the image of the three options to the games object then when u would click back instead of going back the the three options it would double click and go to the menu so a timer would give enough pause so it wouldn't double click

scitunes

are we still talking about jumping?

jstrahan

No switched to beer and football
Well maybe to much beer