# Jump script

**URL:** <https://forum.kirupa.com/t/jump-script/111018>\
**Category:** Uncategorized\
**Created:** [May 22, 2004, 5:38am UTC](https://forum.kirupa.com/t/jump-script/111018 "2004-05-22T05:38:55Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Fydus](https://avatars.discourse-cdn.com/v4/letter/f/8c91f0/32.png) [@Fydus](https://forum.kirupa.com/u/Fydus)\
**Post date:** [May 22, 2004, 5:38am UTC](https://forum.kirupa.com/t/jump-script/111018/1 "2004-05-22T05:38:55Z")

</div>

I’m trying to make a jump script for a side scoller.  
i have my own jump script i use but its really complicated.  
Anyone have an easy jump script they use?  
It’d be much appreciated.  
Thanks

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<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/6/2/621e5c11736f46532526e61be85940af4230f3e5.png) [@system](https://forum.kirupa.com/u/system)\
**Post date:** [June 15, 2004, 4:09pm UTC](https://forum.kirupa.com/t/jump-script/111018/2 "2004-06-15T16:09:28Z")

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Thanks for the script man it has been usefull.

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<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/6/2/621e5c11736f46532526e61be85940af4230f3e5.png) [@system](https://forum.kirupa.com/u/system)\
**Post date:** [June 17, 2004, 5:21pm UTC](https://forum.kirupa.com/t/jump-script/111018/3 "2004-06-17T17:21:50Z")

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I’ve been playing around with that jump script and it works wonderfully. My question is I added a platform and called it “platform” (creative eh?) and I added the hitTest code so the object will stop falling when it lands on the platform, but since the code tells the gravity to stop, when I walk off the platform the object doesn’t fall, it just walks left to right and doesn’t fall back to the ground (cause gravity is set to 0). How do I check if its on the platform or ground all the time so the object will fall when it moves off the platform?

Thanks

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<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex011/uploads/kirupa/original/3X/6/2/621e5c11736f46532526e61be85940af4230f3e5.png) [@system](https://forum.kirupa.com/u/system)\
**Post date:** [June 17, 2004, 7:58pm UTC](https://forum.kirupa.com/t/jump-script/111018/4 "2004-06-17T19:58:37Z")

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You would use a code like this, this also does movement code

```auto
onClipEvent (load) {
	moveamount = 10;
	gravity = 1.3;
	jumpHeight = 20;
}
onClipEvent (enterFrame) {
	old_x_object = this._x;
	old_y_object = this._y;
	if (Key.isDown(Key.up)) {
		if (jump) {
			yspeed = yspeed-jumpHeight;
			jump = false;
		}
	}
	yspeed = yspeed+gravity;
	y = this._y+yspeed;
	if (_root.back.hittest(this._x+31, y+30, true)) {
		if (yspeed<0) {
		} else {
			jump = true;
		}
		yspeed = 0;
	} else {
		this._y = y;
	}
	this._x = this._x+Key.isDown(Key.RIGHT)*moveamount-Key.isDown(Key.LEFT)*moveamount;
	gotoAndStop(2);
	if (_root.platform.hitTest(this._x+30, this._y+30, true) or _root.back.hitTest(this._x-30, this._y-30, true)) {
		this._x = old_x_object;
		this._y = old_y_object;
	}
}

```