#Need help with my pong game

144 messages · Page 1 of 1 (latest)

autumn shard
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Was making a pong game and I implemented the enemy AI but when he moves, the animation only plays the first frame each frame so it looks like it is stuttering, I am sure that's because it is checking the position each frame and changing the movement vector each frame so it looks like as if it is pressing the button each frame instead of holding it down because of the delta time, but I don't know how to fix it, please help it is stressing me out lol

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@export var speed = 600
var hit : bool

@onready var movement = Vector2.ZERO

func _physics_process(delta):
    movement = Vector2.ZERO
    
    if GlobalVariables.scored == false and GlobalVariables.start == false:
        if abs($"../Ball".position.y - position.y) > 25:
            if $"../Ball".position.y > position.y:
                movement = Vector2.DOWN
            elif $"../Ball".position.y < position.y:
                movement = Vector2.UP
    
    if GlobalVariables.scored == false and GlobalVariables.start == false and movement == Vector2.ZERO:
        $"RA".play("Idle")
    if not movement == Vector2.ZERO:
        $"RA".play("Run")
        if $Timer.time_left <= 0:
            $Walking.pitch_scale = randf_range(0.8, 1.02)
            $Walking.play()
            $Timer.start(0.250)
    if hit == true:
        $"RA".play("Hit")
    
    move_and_collide(movement * delta * speed)
    

func _on_area_2d_area_entered(area):
    hit = true
    await get_tree().create_timer(0.1).timeout
    hit = false```
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...anyone?

primal torrent
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Maybe you need to ensure that the run animation isn't already playing, because if you start playing it each frame it'll reset to the first frame

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if RA.current_animation != "Run" or something

autumn shard
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i will try that in a lil bit one second

autumn shard
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there is no .current_animation variable

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nope, doesnt work

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any other ideas?

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i feel like i need to put the function that triggers the run animation OUTSIDE of the delta function

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but idk where else to put it

junior thistle
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make it play once?

autumn shard
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Yeah that's the idea

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It has to loop as long as velocity isn't zero

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But checks its position relative to the balls position each frame

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And moves it

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So it is as if it is spamming the movement button extremely fast, instead of holding it down

autumn shard
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That's the last hurdle I gotta pass

short rover
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I think the issue is not with your animation but the enemy's movement. You are checking if the enemy is more than 25 pixels above or below the ball and then moving them in the appropriate direction up or down. But the enemy is moving so fast it is catching up with the ball, so it is nolonger outside the 25 pixel boundary, which makes it stop moving and go into the idle animation. The ball carrys on moving until the enemy is outside the 25 pixel boundary again and so the enemy starts moving with the walk animation and so on. That is what is making the animation stutter, the enemy is repeatedly switching between walk and idle states.
One way to fix this would be to make the enemy follow the ball at the same speed the ball is moving. Try replacing:

        if abs($"../Ball".position.y - position.y) > 25:
            if $"../Ball".position.y > position.y:
                movement = Vector2.DOWN
            elif $"../Ball".position.y < position.y:
                movement = Vector2.UP

With:

        if abs($"../Ball".position.y - position.y) > 25:
            movement = $"../Ball".velocity.y
autumn shard
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I can't do that, then it would always just win

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And the ball is gradually getting faster

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What if I just remove the 25 pixels requirement?

warped trout
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Why do you use an animation to move your enemy? Why not set the position of the paddle just via code?

wooden sonnet
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ah i could try helping but i only mess with c#, only if you acept c# solutions aswell

short rover
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Try it without the 25 pixel requirement but I think that might lead to the enemies jittering because they would keep overshooting the exact position of the ball.
Instead you could limit the enemy's movement speed with:

        if abs($"../Ball".position.y - position.y) > 25:
            movement = $"../Ball".velocity.y.limit_length(max_speed)

And having max_speed set to the maximum speed you want the enemy to be able to move at.

wooden sonnet
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if hit = true then $"RA".play("Hit"), is this correct? like that, let's suppose the hit bool stays on for 4 miliseconds, if that's so then the "Hit" animation will play on these 4 times that the frame repeat, i had some troubles with that on the past, instead of checking the position and doing so the timer waits 0.1 frames, you could just assign the animation to play when the area is triggered

func _on_area_2d_area_entered(area):
$"RA".play("Hit")

like this, you will not be on the need of creating a bool to check if it got collided

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if it's not that, i'm not sure because i used to unity and i'm kinda a newbie to godot lol, so i'm not sure how animation trees and stuff works properly on godot

primal torrent
autumn shard
autumn shard
autumn shard
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Thanks I will still use that but my issue is the run animation

primal torrent
autumn shard
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Is playing checks if an animation is playing

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At all

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Regardless of which animation

autumn shard
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But I have to sleep for now

primal torrent
# autumn shard Regardless of which animation

i havent worked with the animated sprite editor yet, but wouldnt you use some kind of loop in the run animation and not in any of the others?
that would mean

if not $"RA".is_playing():
  $"RA".play("Run")

should let the hit animation finish and then start but never start again while running

autumn shard
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It just has a loop option you can turn on

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When you set the animations themselves

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Idle animation needs a loop too

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So does the winning animation

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And losing

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Should still try it cuz

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No animation would be playing while velocity is not zero

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If I delete the line so it might work

wooden sonnet
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ok then, here's another idea
on the animtation tree, replace the idle and walk animations for a blendTree instead
after that, add the idle and walk animations inside the blend tree, they both need to be set as loop

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after that, calculate the velocity of the enemy Y position, and set the influence of the blend tree to the value of the Y velocity

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an example of this is:
Vector2 corrected = new Vector2(velocity.X, velocity.Y);
anim.Set("parameters/idle/blend_position", corrected);

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for example, if the velocity Y is 1 or -1 and you take the Absolute value of it, the blend position will be set to 1 which will be the walking animation, and if it's 0(not moving) the idle animation will be the one playing

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using this you don't need to check if it is moving or it's stopped to use animTree.play all the time

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let's see if i can generate a godot code for that...

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func _physics_process(delta: float) -> void:
var corrected = Vector2(velocity.x, velocity.y * -1)
anim.set("parameters/idle/blend_position", corrected * 1.0)

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this should work, now, pay attention on "idle", "idle" is the animation of the animation tree

autumn shard
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I wasn't using anim tree to begin with I will have to figure that out

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Why do we correct vector2 tho?

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I will try it if the first suggestion doesn't work

wooden sonnet
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for my game, i needed the velocity.Y to be the opposite value so i did it *-1, but i don't think you'll need that

autumn shard
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Oh alright

wooden sonnet
autumn shard
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I will find a YouTube guide for it I can't learn from scratch with the docs

wooden sonnet
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i leant from this one when i was starting on godot

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the sprite animation node is generally good for specific things, when you want to implement something complex like that, you'll need to mess with a lot of things to check if animations are overrided and stuff, it's very instable on some cases

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on your case is really better to adopt the animation tree node

autumn shard
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Animatedsprite2d did it's job

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Rest in peace

wooden sonnet
wooden sonnet
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did it worked?

autumn shard
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It is too late in the night I am too tired to get on laptop

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I will try it in the morning!

wooden sonnet
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oke bai bai toasty

autumn shard
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i have another question

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oh it was just the text allignment nvm

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was gonna ask why one of my buttons have an effect when i hover and click but it was just that it was alligned to left instead of center, all good

wooden sonnet
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Lol

autumn shard
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reducing the difference between them and making the ball a bit faster fixed it for some reason

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as far as i can see

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it is probably still janky but i will keep it for a first try

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nevermind it is very jittery

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i will try animation tree

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i gotta merge all my spritesheets together to use animation tree..?

autumn shard
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some things in my animation tree isnt in the video, some things in the video isnt in mine

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this is driving me crazy

wooden sonnet
autumn shard
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there is no button to make it start in that state and the start and end stuff arent in the video

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i am getting a headache

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it must be godot 3 the video is from 3 years ago

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i will go find another way

autumn shard
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I THINK i fixed it

wooden sonnet
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Send the code again?

wooden sonnet
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And create a transition from start to Idle

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Right click the start state and set it to the idle state

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Oops, you coded it like it was still a sprite2D animation

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Ok, enter to your Idle state, let's see what you put in there

autumn shard
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already deleted animation tree was stressing me out

wooden sonnet
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Uh oh

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Do you mind If you sent the project to do it for you? Later on i give you a explanation

autumn shard
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nah i will take a break

wooden sonnet
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Of the animation tree n stuff, or i can explain everything to you

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Ah oke ok

autumn shard
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it stressed me out too much

wooden sonnet
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Sorry for that

autumn shard
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i made half of the field an area

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and if the ball enters there run should play

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but it doesnt

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why doesnt it work

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i think cuz on area entered it only triggers the frame it enters the area?

autumn shard
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i just made the ball faster, it does look good

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or least is fast enough to not be noticable

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i also made it so that the enemy stops moving once the ball bounces off of him, and starts moving when it enters his half, so he cant catch up sometimes

wooden sonnet
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hmm...

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let's keep in dms

wooden sonnet
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i've sent a lot of messages in dm explaining the animationtree thingy, in case you wanna know about it later

autumn shard
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Maybe later, I am tired of it rn, I will just finish the rest of this and call it a day

autumn shard
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i have another problem, followed a guide and made a scene transition, put it on autoload, called it in the actual scene, but this is what happens

image.png
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i followed this guide

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i followed it word by work i dont know what i missed

autumn shard
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anyone at all..?

autumn shard
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i swear i fix something, another rat pops up

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what is this why does it play only a quarter of the animation

autumn shard
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Cool game @autumn shard

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thanks