Make a Platformer in GameMaker! Part 2 (Double Jumping, Variable Jump Height, Input Buffering) 

!!! IMPORTANT FIX TO THE VIDEO !!! You may have noticed it seems like your input buffering stopped working after the variable jump height code. Have no fear it IS still working, but just maybe not the way you expect. Basically once we added the code that we commented "//Cut off the jump by releasing the jump button", it's basically stopping us from initializing the jump even if the input is buffered. This means the input IS still buffered as long as by the time we are hitting the ground we are still holding the jump button, so we are still getting a more generous input window. BUT if you want to change it to where you can tap the button before you land and still get a little hop (which would probably be preferable behavior especially if you want to have a short jump buffer), then do THIS! Take this little code block: //Cut off the jump by releasing the jump button if !jumpKey { jumpHoldTimer = 0; } and move it BELOW the next little code block: //Jump based on the timer/holding the button if jumpHoldTimer > 0 { //Constantly set the yspd to be jumping speed yspd = jspd[jumpCount-1]; //Count down the timer jumpHoldTimer--; } Basically just swap their places, that way, after we initialize the jump with the buffer, we will ALWAYS get at least one frame where our yspd is being set to the jumping speed since by the time we are setting our jumpHoldTimer to be 0, we've already run the code checking if jumpHoldTimer is ABOVE 0. It's up to you which behavior you want to have in your game! I do however think this behavior is better and it's what I intended to put in the video!

"i'm not a real anything" man i felt that in my soul LMAO

Simple, but effective tutorials. You even teach us why things work instead of just making people copy things. Love your stuff!

Really appreciate that you don't take too long to upload the other parts despite having them on Patreon. Greetings from Mexico!

Just finished your first tutorial in this series. Amazing as always! Thank you so much for these!

18:47 that gave me a mini heart attack, I thought I didn't follow along XD

Already Excited for all the new episodes!

love this toturial! currently working on a rage platformer and watching the entire series rn and this has helped me a LOT! thank you very much for making these!

Thank you for your videos, they really help me out. I haven’t coded in a while after getting my certification in it and I understand it, but I sometimes overcomplicate it and mess it up and get confused but, you make it so easy to understand, thank you and I look forward to even more game development tutorial videos.

Hi, I noticed that at 32:20 you used the "BONK CODE" but I also noticed that there is an easier way which can be done in a single line of code. I added an if statement right before the line "y += yspd" since before it there is the precise collision check. Code: if yspd == 0 {jumpHoldTimer = 0;} So basically after the precision check if it gives 0 for yspd you can't go anywhere further with the jump but you start falling. Thanks again for your tutorials, I started with this series but at the first episode you said "If you never touched this program go and watch first the RPG game tutorial." so I watched that all in a day and now I am here where I started. Thanks a lot mate :D.

isn't it better to just use "or" for taking inputs? for example: right_key = (keyboard_check(ord("D")) || gamepad_button_check(0 , gp_padr));

Awww yeah! I'm not 2 years late to an upload. Thanks for making these series! They really do teach us well. I love how you thoroughly explain the whys like why this is being set as a variable and having suggested test points makes it way easier to understand "I just changed 1 thing and now I can do this" rather than make everything, test it once and your golden. Much appreciated!!! Also had a gamemaker quistion for a funny idea. I think it's a dead lead but basically knowing that inputs give a 1 or 0 I was curious if you could multiply that by 5 and have to literally remap your keyboard to have 5 of the same buttons. Someone said that's like trying to sense 5 fingers on the same key... Any suggestions to make my remapping dream a reality?

genuinely, you are turning me into an indie game dev here, thank you so so much for your tutorials, hope we can collab if i ever get famous lol

Thank you so much for the video!

Just joined your patreon out of curiosity of the final thing, cos i dunno maybe it wasnt worth my time if it didnt have the features i was looking to learn, but now you have my full attention haha imma follow this one to the end, im just wondering how im going to adapt this to my prefered way of programming this stuff (i do a state machine and make every little thing into a function) but thats a me problem wich i will deal with later. In any case im impressed, this is the first time i see one of these tutorials that actually has stuff like moving platforms of various types that actually seem to interact well between them (at least with the little testing i did in your project file), cant wait to get to that part

THanks these are great!

Literally man, if i got u, i need no other tutorials!!!

Thank you alot you are in my heart

Just followed / subbed, but also have a question -- I might have made some kind of mistake somewhere, but I've added some debug-messages for the jumpCount variable -- And it looks like when I jump using the character, the count increases for just -barely- a moment before resetting back to 0 for some reason. As of now, I've not been able to pinpoint why, but currently tracing through options to see what resets the jump-count before the ground is hit again. A step in the right direction could be cool -- and thanks for the tuts / videos / etc! =) EDIT (12:16AM) -- I've found the issue! Block of code written in the wrong place! Correct placement fixed the issue completely! One of those beginner things and just constant review helped. Thanks again!

awsome series of tutorial both for beginners and intermediate users i think. really really appreciate all of your works!! i suggest this method in order to obtain a hypotetical "infinite series of middle-air jump" without adding a lot of variables in the create event. just before using the variable jumpholdFrames[jumpCount-1] - that was in 2 part of Y movement code - add this local variable with this if condition ---> var _jumpCount = jumpCount-1; if _jumpCount >= array_length(jumpholdFrames) _jumpCount = array_length(jumpholdFrames)-1; jumpholdTimer = jumpholdFrames[_jumpCount]; in this way jumpholdframe will read the last entry for jump frame and speed

In the end, input buffering stopped working after including the variable jump. I think I typed something wrong, I'll check Your work is amazing! I'm learning GameMaker by watching your series. I'll be waiting for a new series. Thanks ❤

You make coding fun, love your tutorials :-))

19:18 lets gooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo (my first line of code typed before it was shown in the vid) -yeah its not much, but when you are an absolute beginner it feels like something.

thank you so much for the amazing content, i dont understand the point of 20:54 because its just double jumping? there is no extra jump, right?

the best!!!!!!

Nice series. Just one question: how do I code acceleration?

i love this but for some reason, the second time i follow this tutorial, the bonking stops working. ur fix to crashing works but i have a different bug. whenever i jump onto the ceiling, i just get stuck. i can sometimes drop out from the side but mostly not. this happened only the second time.

How do you think the best way to add shooting and simple patrol?

hello ive adjusted some few things and skipped over the part where you fix the jump and double jump thing but when i add the background my character keeps sinking why is that EDIT: its working now (DONT USE ASSETS AS YOUR BACKGROUND)

If I were to do gamepad_button_check with a generic USB controller, what sort of Inputs should I opt to use?

"before we add more code" (adds more code)

when I switched my jumpKeyPressed with jumpKeyBuffered in line 35 it cancled jumping

Adding a viewpoint causes the player object and wall object to slightly overlap. How can I solve it?

Couldn't you just use or for the inputs? It works fine, so you don't need to do the clamp, unless there is a reason I'm missing. Ex: rightKey = keyboard_check(vk_right) or keyboard_check(ord("D")); leftKey = keyboard_check(vk_left) or keyboard_check(ord("A")); I also have not finished the video.

Also, the "coyote time" error doesn't apply to me because i use different sprites than just squares. At least that's what I think...

is there a way to make the jump count = 1; and make it so i can pick up a "power up" and that will add to the jump count I tried adding //if place_meeting(x, y, oPowerUp) {jumpCount = 2; instance_destroy(oPowerUp)} and that didn't work, can anyone help me? thanks a lot, have a good day!

hey what setting makes gms stop worrying about the camel case?

can you make a bullet hell tutorial for this series also like cuphead

Why did you make both pressed and not pressed jumpKey in the getControls script?

I followed the tutorial and it says invalid token 1. After moving the controls from the step event to the script i can no longer do anything but jump. I cant move left or right anymore. *Edit i fixed it. Retyped all input codes again and it worked. Not sure what went wrong*

I've been trying to advance my code but my character jumps eternally like flappy bird and i dont know why. And of course, i checked over and over again the code.

you can simplify the jumping a little so you don't need the timer like this if jumpKeyBuffered && place_meeting( x, y + 1, oWall ) { jumpKeyBuffered = 0; jumpKeyBufferTimer = 0; yspd = jspd; }else{ if jumpKeyRelesed && yspd < jspd/2 { yspd = jspd/2; } } this works better for me

My jump height variable isn't working any clue why?

at 23:06 i tried using the code you showed, "if !jumpkey {jumpHoldTime = 0 }" but it did not work, i have no idea why and the logic is correct

At 8:07, at the if statement, shouldnt we write this instead: if(jumpKeyBufferTimer >= 0){ ... Because the way it is written i think we always have one less frame. Am i right? IMPOPRANT EDIT: it messed up my double jump and i have no idea why. I reverted back to video's code :/

I keep getting an error saying that the jumpKeyBufferTimer is not set before reading. I checked my code and I cant see the problem. Maybe I am too tired and need to redo everything tomorrow with fresh eyes

:)

Hey why does my game crash immediately after trying to jump?

my jump stopped working :(

23:07 My player just moves up on start, WTF