Better Jumping in Unity With Four Lines of Code 

That is only because gravity is different in Japan.

Very nice tutorial. A little optimization tip: You should multiply your scalars first and then multiply by the vector at the end, or use parenthesis to isolate your scalar multiplications, to avoid extra Vector2 creations. Also, once you're satisfied with your gravity value you can cache Physics2D.gravity.y * (fallMultiplier - 1) and Physics2D.gravity.y * (lowJumpMultiplier - 1) to avoid this unnecessary math on Update. Cheers!

I'm still looking this video up every time I'm trying to make a 2D platformer. So simple and useful.

Very nice explanation. Those who are taunting about video length. Please pay attention his explanation as they were detailed and he pointed the problems with usual unity script. So keep up the good work dude. :)

wow, rarely do I find code this comprehensible. Good job explaining not only the code but also the whole jumpiness ^^ You're Awesome

I don't know how RU-vid knew I was having a problem with this but damn, exactly what I needed! Thanks so much!!

I always thought the jump was weird, and I did the exact same things you said we would probably do. So thanks, this video was a godsend!!!

Absolutely incredible tutorial. so simple, was struggling to figure out why my jump felt "off", then finally found your video. Explanation was on point, very clear and well presented.

I have watched multiple tutorials for Unity, and all of them have been so confusing. Your video here has made so much sense to me. Thank you.

Thanks for the tutorial, well explained, without saying a bunch of extra unnecessary/not-quite-on-topic stuff!

This is awesome! I've tried implementing jumping using Phaser (instead of Unity) in a web game, and ran into the same issue. The theory behind this still holds true and perfectly translates over. Thanks!

I think this works really well when you let the player decide when they want to fall faster. It makes you feel really in control of how you move. Great vid!!!

4 lines of code. 12 minutes 46 seconds = 766 seconds = 0.005 lines/second

Thanks! I could use it for my lil 3D isometric prototype and jumping feels so much better now!

OMG Thank you sooooo much. This was just the video I was searching for a few hours now. I had two problems with my jumping and I was hoping it would fix maybe one of those. Not only it fixed both but your code is so simple and shot. You are my todays hero...

I really enjoyed your detailed explanation on why those jumps feel more natural to us. Nice work!

I've recently solved this problem in Godot 3 in a 3D platformer. I've implemented this differently - the player measures the time between the key press and release and there's a maximum afterburner time defined (about 0.5 s). During that time if the jump key is still depressed I apply additional upward velocity which ramps from 100% to 0% over the maximum afterburner time. This provides a very smooth and natural-looking yet expressive jump, it's pretty flexible to balance and doesn't mess with gravity

Holy crap man, I’ve been thinking of trying to recreate Mario World 1-1 as my first project to help me get a better grasp at game development and this helped me out a ton. Every time I wrote some form of jumping mechanic it felt too floaty and unmario like I just couldn’t wrap my head around it. As l was watching your video the ideas and solutions became clear to me. Thanks man.

This is the most useful jump script I've seen so far. Thank you very much

It took a while to implement this for me (cause of the existing script) but man, jumping feels a whole lot better now. Thanks.

Hey thanks for the tutorial! Made my jumps a lot nicer, although I had to do some moving around for the "else if" statement as I had animations playing and such :)

Thanks for this video, man, it helped me a lot. I saw the debate in the comments about the way you did it and I wanted to elaborate on the right way to implement this ideas. The thing with implementing acceleration in a simulation is that real life doesn't work in the same way: physics simulations work by taking little steps advancing in time, while time in real life is continuous; there are no steps. It's actually very hard to know where an object is going to be in real life, even if you know it's velocity, acceleration and current position, because its velocity changes every instant. What we do in video games to aproximate that effect, where physics have to be calculated very fast, is to take as many little steps as we can in our simulation in time and sometimes we also try to retroactively interpolate the position based on current acceleration. It's enough, but it's not perfect. So, the problem with doing the acceleration in the update is that, when the number of steps taken (the frame rate) is different, we end up with different positions. In this example, we end up with different short jump heights in different frame rates, which is not nice. So, here's what we can do: We create an additional variable, a boolean for storing the state of the jump button, I'll call it jumpPressed. Then, in Update we only have: void Update() { if (Input.GetButtonDown("Jump")) { //there is no problem with changing velocity once in update, //but addforce is better because it conserves momentum, so you can jump in an elevator GetComponent().AddForce(Vector2.up * jumpVelocity, ForceMode2D.Impulse); } if (Input.GetButton("Jump")) { jumpPressed = true; } else { jumpPressed = false; } } Then in fixed update, we can do the same magic: void FixedUpdate() { //Jump dynamics Code if (rigid.velocity.y < 0) { GetComponent().velocity += Vector2.up * Physics2D.gravity.y * (fallMultiplier - 1) * Time.fixedDeltaTime; } else if (rigid.velocity.y > 0 && !jumpPressed) { GetComponent().velocity += Vector2.up * Physics2D.gravity.y * (lowJumpMultiplier - 1) * Time.fixedDeltaTime; } } And tada!

Works great! Searched everywhere for something like this and somehow this popped up on my recommended page. Creds to you m8!

Great Video! I think it could have been shorter but the clear explanations are great too. This Adds so much To Game Feel and Movement

The best jumping tutorial I ever saw in the youtube it made my game even more realistic thanks Board To Bits Games

this was so helpful! thank you so much..i was always wondering how to achieve this effect..i knew what the other games did but didn't knew how they achieved it...it bothered me so much because i had that exact thinking problem you mentioned at 3:50...god damn why didn't i found that one out? :D thinking outside of the box at it's finest right here :D Thank you for finally solving that little mystery to me x)

This is going to come in handy SO MUCH, especially for game jams where I dont have time to program a non-physics based character controller.

Thanks a lot for the video! I never would've thought about doing it like that, and you did a good job of explaining it.

Excellent analysis of Mario's jump and great video. Did you know this is even easier to implement in the latest version of Unity? Rigidbody2D components actually now have a gravity scale parameter which can be modified at runtime. Great stuff, huh?

Interesting and explained well. Also, I watched your Black Hole shader tutorial and loved it. There aren't really a lot of shader tutorials on RU-vid for shader noobs like me. Could you please do more shader tutorials?

Super helpful tutorial. I've still got some fine tuning to do, but it's massively better already.

Really loved your explanation. I like how you explain the problem and then the solution. Then only give the codes and explaining further about the codes.

"Jump into the jump scrpit" -Board To Bits Games 2017

Every time I see this type of video it makes me appreciate how genius Nintendo is for figuring this out decades ago, without an engine like Unity.

the quality of this tutorial is so good

Thanks a lot for your geneious trick! I've been looking for solution of my 'realistic' jump whole day and finaly found yours! :D

I used this in the opposite, to reduce the effect of gravity. This lets the player glide a bit after the jump. rb.velocity += new Vector3(0, rb.velocity.y * Physics.gravity.y * 0.5f * Time.deltaTime, 0);

Nice work, I'd just separate the input in Update, hold the jump button state in a variable and do the physics in fixedupdate otherwise, you risk accelerating too much or too little depending on your frame rate. I'd also use AddForce with ForceMode.velocityChange instead of summing directly to the velocity, since that takes care of collisions in a better way avoiding you to go through things by directly setting the velocity vector.

Thank you so much! That explanation at the beginning was excellent!

This is great. I love your channel. I believe it is precisely THESE types of tweaks, that make a game worthwhile. When I grab a controller, and I get the FEEL for the game - it is these curves - the curves of the functions - that my body really is getting a feel for Perfecting this sort of innuendos IMHO is the way to create really good games. Look forward to going over all your video library. One at a time :) Thanks for posting.

Wouldn't it be better if you placed the code in FixedUpdate instead of the regular Update, since you're tampering with the physics?

I love programming! There’s just something about creating the brain for an awesome project that makes me can’t wait for my future classes in coding

1st Video im watching from you. Already subbed since you explain really well. Keep it up!

Excellent video with excellent observations and details, thank you very much for sharing!

how to do this with the new input system? I'm having troubles trying to move and jump using 2D physics

None of my characters can jump. Still enjoyed learning this technique, thank you.

This is FANTASTIC. Thank you!

Genius! Thank you, very much. You solved one million problems on my brain and gave me a perfect gimmick to implement!

Okay, your doing `v += gravity` in the jump and `v += gravity * multiplier` in the fall, but that equals: Jump: v += gravity + jumpHeld ? jumpAcceleration : 0 Fall: v += gravity And just a higher base gravity. You didn't want to add to the velocity in the jump (while jump held, add acceleration) and then spent a whole lot of time just rewriting the problem from a different reference frame. But in the end it's the same thing. Your adding a jump acceleration during the jump if the button is held, by manipulating the gravity afterwards. I suspect you will get a better correlation with marios jump if you just apply a force while the button is held anyways.

how does this work on the new inpute system

Thanks for this video. From your implementation, I realized just now that you can have multiple scripts on a single object. This seems like a good way to augment the effects without having a huge character controller.

Great quick tutorial and very well explained, cheers mate!

The amount of views your getting is criminal, something this useful should be way higher.

4:32 its actually suprisingly simple.

golden tutorial. Knew exactly what I needed to do before it, came away knowing more and knowing how

Such a good video, this really helped me. Your doing good and I hope you post more. Subscribed!

The issue with your implementation is that when my character is walking up hill it triggers the condition of low jump and makes it very hard to walk up the hill, so maybe there needs to be some tighter condition checks for low jumping.

Wow, these comments are salty! Thanks for idea, I'm going to use it in UE4 :)

This video was excellent. Great content and superb presentation! Thank you for making it.

I had always wondered why the jumping in my games felt so wrong, thanks for this!

Nice trick using gravity scale. This could benefit from some improvements: * no physics updates in update, use FixedUpdate (otherwise the physics is dependent on the framerate) * d̶o̶n̶'̶t̶ ̶m̶a̶n̶i̶p̶u̶l̶a̶t̶e̶ ̶v̶e̶l̶o̶c̶i̶t̶y̶ ̶d̶i̶r̶e̶c̶t̶l̶y̶,̶ ̶a̶l̶w̶a̶y̶s̶ ̶a̶p̶p̶l̶y̶ ̶f̶o̶r̶c̶e̶s̶ ̶(̶o̶t̶h̶e̶r̶w̶i̶s̶e̶ ̶y̶o̶u̶ ̶m̶i̶g̶h̶t̶ ̶g̶e̶t̶ ̶p̶r̶o̶b̶l̶e̶m̶s̶ ̶w̶i̶t̶h̶ ̶t̶h̶e̶ ̶p̶h̶y̶s̶i̶c̶s̶ ̶e̶n̶g̶i̶n̶e̶)̶

"We can actually solve both of these things by manipulating one thing...Gravity". The movie. I fucking knew it, never that easy.

such a simple fix but man does it ever make a difference. Great work!

thanks so much i didnt know how to script this on my own, this helped me understand the physics and velocity a bit more in c script. thank uand good vid keep up the good work.

4:31 "...show the what's actually surprisingly simple code..." My brain: Hears Ceave Gaming: "The answer is *surprisingly simple!*"

People if you want to make a simple code for the character to jump only in the ground, use Raycasting instead of OnCollisionEnter, i used it and i reduced the amount of code significantly and got a better result

This video is perfect for everyone. I'm a beginner in programming and even I could understand it easily. It is very optimised too.

Using this in my game. Thanks a lot for explaining really well and really dissecting the jump mechanic in Mario.

Mario's jump physics is pretty weird. (and complex.) Not only does he go up faster than down, but your rate of descent varies depending on whether you hold the button down or not. (as do other parameters of the jump) And of course, you have a large degree of air control. (now, contrary to what you might think, in reality you also have air control, but mostly over your angular momentum, less so over linear motion.) There's a lot of factors here that aren't based on reality...

9:37 Why don't just scale the gravity? Rigitbody even have a variale for that

Good video! Been looking for something like this for a while.

Great video man, really appreciate the knowledge!

12 minutes 4 lines of code

its not working 4 me

This is one of the best simple tut for jumping so far for me, Thank you. definitely gonna sub 🙂👍

Thanks for the video! I was struggling hard with the jumps and this helped a lot.

There's a big problem here. If you keep clicking and letting go of the space bar over and over again you can jump forever.

This is good and all but why would you just not make the multipliers 1.5 and 1 instead of having an extra step of subtracting 1 anyway

Wow ok! I'm very impressed by the work you put in this. Thank you :D

This is exactly what i've been looking for. Thanks man

you can just use gravityScale of rigitbody for this in 1 line of code

I can write an entire game in 1 line of code...

Beatiful, simple and usable, thank you

This video was so helpful! I used it to add to the Philippe St-Amand Kinematic Character Controller.

"Better Jumping in Unity With Four Lines of Code" - 12 minute video

was never a fan of mario 1's jump arc i play a lot more of castlevania

This is so helpful. I learned a new method for jump. Thank you very much.

Thank you very much. My player's jump looks really cool now.

12 minutes for four lines, what the fuck is going on?

4 lines of code in 12 minutes...

I've watched like 8 jump tutorials (brackeys, blackthornprod, code monkey and others) and yours is the best and most reasonable yet (Y)

I know this is an old video, but it certainly helped to improve my jump. Thank you!

What you described had nothing to do with "lines of code".

Now this is a legendary video

wow thank you bro, you just got another sub keep up the awesome and quick learning work :D

This is an excellent analysis, thank you

Excellent video my dude.

I just love this. Thanks a bunch!

I love these kinds of videos.

Wow! Really great JUMP tutorial! Well done! 👍🤓