trying to make a double tapping work as dash (biginner)

Happy_Smile

I am trying to use the double tapping as a dash mechanic for my project but as a bigginer, am lost on how to make the dash work with the double tapping.

const SPEED = 300.0
 const DOUBLETAP_DELAY = .25
var doubletap_time = DOUBLETAP_DELAY
var last_keycode = 0



func _physics_process(delta: float) -> void:
	doubletap_time -= delta
if direction:
		(Speed up)
		velocity.x = lerp(velocity.x, direction * SPEED, 0.05)
		
		
	else:
		# Friction
		velocity.x = lerp(velocity.x, 0.0, 0.05)
(by xyz) Double tap
func _input(event):
	if event is InputEventKey and event.is_pressed():
		if last_keycode == event.keycode and doubletap_time >= 0:
			print("DOUBLETAP: ", String.chr(event.keycode))
			last_keycode = 0
			
			
		else:
			last_keycode = event.keycode
		doubletap_time = DOUBLETAP_DELAY

the double tap works but i don't know how to make it work with speed or as like a dash.
I did try some stuff like changing const on SPEED with var and using +=, wich overwritten the speed.

what is the best and the most simple way to make you boost on a tick or a bit so its like a dash?

"also this is my first time using this post"

DaveTheCoder

Happy_Smile the double tap works but i don't know how to make it work with speed or as like a dash.

Here's a possibility. The code is untested. I'm not sure whether Timers and signals are responsive enough for this usage. If they aren't, then the elapsed time could be monitored explicitly in _physics_process() using delta or Time.get_ticks_msec().

# Remove the constant SPEED, and use the variable speed in physics_process().

# In variable declarations.
const DASH_TIME_SECONDS: float = 1.0
const DASH_SPEED_DELTA: float = 100.0
const DEFAULT_SPEED: float = 300.0
var speed: float = DEFAULT_SPEED
var dash_timer: Timer = Timer.new()

# In _ready() function.
dash_timer.one_shot = true
dash_timer.autostart = false
# When dash_timer times out, reset speed to default.
dash_timer.timeout.connect(func(): speed = DEFAULT_SPEED)
add_child(dash_timer)

# On a double-tap.
# Check whether a previous dash is active before starting a new dash.
if dash_timer.is_stopped():
    # Increase speed and start dash_timer.
    speed += DASH_SPEED_DELTA
    dash_timer.start(DASH_TIME_SECONDS)

Happy_Smile

DaveTheCoder
I got a question, where should I add this function?
I am like really unexpirienced and I did a tutorial on program and game and still am lost
if dash_timer.is_stopped():
#Increase speed and start dash_timer.
speed += DASH_SPEED_DELTA
dash_timer.start(DASH_TIME_SECONDS)
in physics_process( )?

DaveTheCoder

That's the code for starting a dash, so it should be in the place where a double-tap is detected:
print("DOUBLETAP: ", String.chr(event.keycode))

Happy_Smile

ok, I got a question:
how does the dash_timer work excacly?
am trying to understand it but can't really pinpoint on what it does, am thinking about making the keycode ( double tap ) do the dash when I do it.

how does the autostart command work?

func _input(event):
	if event is InputEventKey and event.is_pressed():
		if last_keycode == event.keycode and doubletap_time >= 0:
			print("DOUBLETAP: ", String.chr(event.keycode))
			last_keycode = 0
			if dash_timer.is_stopped():
				speed += DASH_SPEED_DELTA
				dash_timer.start(DASH_TIME_SECONDS)
			
		else:
			last_keycode = event.keycode
			doubletap_time = DOUBLETAP_DELAY
func _ready():
	dash_timer.one_shot = true
	dash_timer.autostart = false
	dash_timer.timeout.connect(func(): speed = DEFAULT_SPEED)
	add_child(dash_timer)

if you want more of my code "wich I mostly tried to improvise and learn what they do with tutorials and sutch" I will.

DaveTheCoder

Happy_Smile how does the dash_timer work exactly?

I tried to explain that in the comments in the code I posted.

This starts the Timer, specifying that it will timeout after DASH_TIME_SECONDS seconds:
dash_timer.start(DASH_TIME_SECONDS)
https://docs.godotengine.org/en/4.7/classes/class_timer.html#class-timer-method-start

This connects the Timer's timeout signal to a lambda function that resets the speed to DEFAULT_SPEED:
dash_timer.timeout.connect(func(): speed = DEFAULT_SPEED)
https://docs.godotengine.org/en/4.7/classes/class_timer.html#signals
https://docs.godotengine.org/en/4.7/getting_started/step_by_step/signals.html
https://docs.godotengine.org/en/4.7/tutorials/scripting/gdscript/gdscript_basics.html#lambda-functions

So when a double-tap is detected, the speed is increased by DASH_SPEED_DELTA, and the Timer is started. DASH_TIME_SECONDS seconds later, the Timer times out and the speed is reset to DEFAULT_SPEED. (I assumed that's what "dash" is supposed to do.)

Happy_Smile how does the autostart command work?

It's not a command, it's a property of a Timer. In this case, it's set to false because you don't want the Timer to autostart. (It's false by default, but it's a good practice to set it anyway.)
https://docs.godotengine.org/en/4.7/classes/class_timer.html#class-timer-property-autostart

Happy_Smile where can I learn code

The best way is to experiment.

Read the documentation.
Type in some code and make it work.
Repeat steps 1 and 2.

I've heard that this free online course is very good for learning the basics of computer programming:
https://pll.harvard.edu/course/cs50-introduction-computer-science

Happy_Smile

Also, I don't wanna waste you're time by making trail and error.
do you got recommendations where can I learn code the best and still use it in a way that it helps with my now or future projects?

kuligs2

DaveTheCoder dash_timer.timeout.connect(func(): speed = DEFAULT_SPEED)

this just will confuse newbies.

better make another func that you connect to

func _ready():
    dash_timer.timeout.connect(on_timer_timeout)

func on_timer_timeout(speed):
    speed = DEFAULT_SPEED

You dont have to confuse people not experienced with code-ceptions/lambdabam

Happy_Smile

Ok, so it fixed one of my problems by getting the double tap once then after holding it like 2 seconds to spam the double tap in the code list.
but still I am not getting the boost. Can I somehow stop the timer when I press the double tap?

	if event is InputEventKey and event.is_pressed():
		if last_keycode == event.keycode and doubletap_time >= 0:
			print("DOUBLETAP: ", String.chr(event.keycode))
			last_keycode = 0
		if dash_timer.is_stopped():
			speed += DASH_SPEED_DELTA
			dash_timer.start(DASH_TIME_SECONDS)
	else:
		last_keycode = event.keycode
		doubletap_time = DOUBLETAP_DELAY

I do feel am close to solving it, can I stop it with a code?

	if last_keycode == event.keycode and doubletap_time >= -//-

I will try more things on weekends bc of school but I will try fixing this during the week.

DaveTheCoder

Happy_Smile

 if dash_timer.is_stopped():
    speed += DASH_SPEED_DELTA
    dash_timer.start(DASH_TIME_SECONDS)

Shouldn't that be indented another level, so that it's at the same level as print("DOUBLETAP: "...) ?

The way it is now, it's going to get executed on every key press, rather than only on a double-tap.

And you may want to adjust the constants DASH_TIME_SECONDS and DASH_SPEED_DELTA. The values I provided were only examples. And you may want to replace DASH_SPEED_DELTA with a multiplier, i.e., multiply the speed by a multiplier liike 1.5 or 2.0, instead of adding a value to the speed.

Happy_Smile

DaveTheCoder
The thing is, its not executing.
I set the dash speed at 10000 and its not doing anything on double tap.
I don't know if I writen the code right or if am missing one peice to the puzzle.
the stop() should work but the engine or the scipt is denying it saying

Function "stop()" not found in base self"

and also I tried this stop(dash_timer) wich had the same awnser.

DaveTheCoder

kuligs2 this just will confuse newbies.

The separate function may be just as confusing to them. Lambda functions can make code simpler.

kuligs2

DaveTheCoder not necessarily. It explicitly says "on_timer_timeout". If you read, this will get called when timer times out, no need to second guess what happens when..

Atleast thats how i read it.

DaveTheCoder

dash_timer.timeout.connect(func(): speed = DEFAULT_SPEED)

Translation: When dash_timer times out, do this: speed = DEFAULT_SPEED.

DaveTheCoder

Happy_Smile its not doing anything

I would have to see more of your code to understand the problem. Can you upload an MRP as a .zip? A Minimal Reproduction Project (MRP) is a small Godot project which reproduces the issue, with no unnecessary files included. Be sure to not include the .godot folder in the archive (but keep project.godot).

Happy_Smile Function "stop()" not found in base self"

You would stop the Timer like this:
dash_timer.stop()
or
dash_timer.timeout.emit()
https://docs.godotengine.org/en/4.7/classes/class_timer.html#class-timer-method-stop

But why do you want to do that? It stops itself when it times out.

Happy_Smile

DaveTheCoder

movement.zip

927B

My thought process was thinking if I just stop the dash with two tap, I could reset the timer so it could go agian if needed and I will just say this, I though making a two tap dash would be easy for a biginner, I guess not.

Also am noticing your interest, you must really like problem solving.

DaveTheCoder

Happy_Smile lso am noticing your interest, you must really like problem solving.

Looking at an uploaded MRP is usually easier and faster than a long series of forum posts.

DaveTheCoder

I'll need an entire Godot project folder, not just a script (Movement.gd). Please read the explanation of MRP in my previous post.

And please state your Godot version.

Happy_Smile

It should be the newest version, downloaded it like 2 months ago.

Am very new with this.

You can expect hick ups very often from me

DaveTheCoder

Happy_Smile It should be the newest version, downloaded it like 2 months ago.

I need the exact version. In the Godot Editor, you can obtain it from Help / About Godot.... You can click on it to copy it to the clipboard and paste it here, like this:

v4.7.2.stable.official [ed1daf0bf]

Happy_Smile

Ok, I'll will send it to you tomorrow.