How to change this angle?

aramkik2007 · August 7, 2024, 3:53pm

Godot Version

3

I want that ball to move at random angles but not to be fixed angle like this, i want it to face to up.

extends KinematicBody2D

var speed = 750
var increase_amount = 10
var velocity = Vector2()
var collided = false

signal score_increment

func start(pos):
	position = pos
	var angle = rand_range(-PI / 6, PI / 6)
	if randf() > 0.5:
		angle = rand_range(5 * PI / 6, 7 * PI / 6)
	rotation = angle
	velocity = Vector2(speed, 0).rotated(rotation)
	collided = false

func _ready():
	randomize()
	# Ensure the ball starts moving when the game starts
	start(position)

func _physics_process(delta):
	if velocity != Vector2():  # Check if velocity is initialized
		var collision = move_and_collide(velocity * delta)
		if collision:
			velocity = velocity.bounce(collision.normal)
			if collision.collider.is_in_group("Paws") and not collided:
				print("Collided with Paw")
				emit_signal("score_increment")
				speed += increase_amount
				velocity = Vector2(speed, 0).rotated(rotation)
				collided = true
				print(speed)
		else:
			collided = false
	else:
		print("Velocity not initialized")

# Call this function to start the ball movement with initial position
func init_ball(start_pos: Vector2):
	start(start_pos)

But its not facing down every time i just want to face only up.

nutlike4693 · August 7, 2024, 4:43pm

Well, the start function seems to randomize, does it? Is the start random or not?

When else do you want it to randomize? After a collision?

aramkik2007 · August 7, 2024, 4:50pm

yes its starts random, and yes i would like to change angle after collision to make it face not down every time

herrspaten · August 7, 2024, 4:52pm

This might have been my fault you probably have to change this line:

velocity = Vector2(speed, 0).rotated(rotation)
# to this
velocity = velocity.normalized() * speed

aramkik2007 · August 7, 2024, 4:54pm

now it not even moving

herrspaten · August 7, 2024, 4:54pm

Can you print out the velocity before that?

aramkik2007 · August 7, 2024, 4:57pm

like this ?

func start(pos):
	position = pos
	var angle = rand_range(-PI / 6, PI / 6)
	if randf() > 0.5:
		angle = rand_range(5 * PI / 6, 7 * PI / 6)
	rotation = angle
	print(velocity)
	velocity = velocity.normalized() * speed
	collided = false

herrspaten · August 7, 2024, 4:58pm

no in the physics_process-method after:

if collision:
			velocity = velocity.bounce(collision.normal)
			print(velocity)

just for testing purposes

aramkik2007 · August 7, 2024, 5:00pm

— Debugging process started —
Godot Engine v3.5.3.stable.official.6c814135b - https://godotengine.org
OpenGL ES 3.0 Renderer: GeForce GTX 550 Ti/PCIe/SSE2
Async. shader compilation: OFF

Velocity not initialized
Body entered:LeftPaw
Body entered:RightPaw
Body entered:Borders
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— Debugging process stopped —

herrspaten · August 7, 2024, 5:01pm

i think that has to be “==” and not “!=”:

if velocity != Vector2():

aramkik2007 · August 7, 2024, 5:02pm

okay
— Debugging process started —
Godot Engine v3.5.3.stable.official.6c814135b - https://godotengine.org
OpenGL ES 3.0 Renderer: GeForce GTX 550 Ti/PCIe/SSE2
Async. shader compilation: OFF

Body entered:LeftPaw
Body entered:RightPaw
Body entered:Borders
— Debugging process stopped —

herrspaten · August 7, 2024, 5:03pm

But it collided right?

aramkik2007 · August 7, 2024, 5:04pm

yes but how i dont understand cuz its not moving

its on the center but colliding

herrspaten · August 7, 2024, 5:05pm

Put a print here:

var collision = move_and_collide(velocity * delta)
print(collision)

collision has to be a value != null. I have to go now but maybe this helps

aramkik2007 · August 7, 2024, 5:05pm

okay no problem, thanks(yes its = null)
[Object:null]
Body entered:LeftPaw
Body entered:RightPaw
Body entered:Borders
[Object:null]
[Object:null]
[Object:null]

ah i see now thats body entered isnt my ball thats my deatharea

extends Area2D


func _ready():
	connect("body_entered", self, "_on_Area2D_body_entered")

func _on_Area2D_body_entered(body):
	print("Body entered:", body.name)
	if body.is_in_group("Ball"):
		print("coll")
		body.queue_free()

nutlike4693 · August 7, 2024, 5:19pm

Just add the above lines from your start function to your physics process right before you set the velocity

aramkik2007 · August 7, 2024, 5:24pm

what is this

now its not rotating and its even more ugly thats before

extends KinematicBody2D

var speed = 750
var increase_amount = 10
var velocity = Vector2()
var collided = false

signal score_increment

func start(pos):
	position = pos
	velocity = Vector2(speed, 0).rotated(rotation)
	collided = false

func _ready():
	randomize()
	# Ensure the ball starts moving when the game starts
	start(position)

func _physics_process(delta):
	if velocity != Vector2():  # Check if velocity is initialized
		var collision = move_and_collide(velocity * delta)
		if collision:
			var angle = rand_range(-PI / 6, PI / 6)
			if randf() > 0.5:
				angle = rand_range(5 * PI / 6, 7 * PI / 6)
			rotation = angle
	
			velocity = velocity.bounce(collision.normal)
			if collision.collider.is_in_group("Paws") and not collided:
				print("Collided with Paw")
				emit_signal("score_increment")
				speed += increase_amount
				velocity = Vector2(speed, 0).rotated(rotation)
				collided = true
				print(speed)
		else:
			collided = false
	else:
		print("Velocity not initialized")

# Call this function to start the ball movement with initial position
func init_ball(start_pos: Vector2):
	start(start_pos)

Cant i move at random direction not random angle and fixing my mouse angle ?

nutlike4693 · August 7, 2024, 5:33pm

well, I will need to take a deeper look, but cannot right now. If you are still having issues I will look at it on several hours when I can focus on it.

aramkik2007 · August 7, 2024, 5:34pm

okay, no problem, thanks

aramkik2007 · August 7, 2024, 5:54pm

Guys i made it like this, and i think it works pretty fine but of course without @herrspaten and @nutlike4693 it would be harder.Thanks so much

var speed = 750
var increase_amount = 10
var rotation_speed = 2 # Adjust this value for rotation speed
var velocity = Vector2()
var collided = false

signal score_increment

func start(pos):
	position = pos
	# Ensure the ball starts moving at an angle not too close to horizontal
	var min_angle = deg2rad(30)
	var max_angle = deg2rad(360)
	var initial_angle = rand_range(min_angle, max_angle)
	
	velocity = Vector2(speed, 0).rotated(initial_angle)
	
	# Check if velocity is too horizontal and reassign if necessary
	while abs(velocity.angle()) < min_angle or abs(velocity.angle()) > max_angle:
		initial_angle = rand_range(min_angle, max_angle)
		velocity = Vector2(speed, 0).rotated(initial_angle)
	
	collided = false

func _ready():
	randomize()
	# Ensure the ball starts moving when the game starts
	start(position)

func _physics_process(delta):
	if velocity != Vector2():  # Check if velocity is initialized
		# Move the ball and check for collision
		var collision = move_and_collide(velocity * delta)
		if collision:
			# Reflect the velocity based on the collision normal
			velocity = velocity.bounce(collision.normal)
			if collision.collider.is_in_group("Paws") and not collided:
				print("Collided with Paw")
				emit_signal("score_increment")
				speed += increase_amount
				# Maintain direction but increase speed
				velocity = velocity.normalized() * speed
				collided = true
				print(speed)
		else:
			collided = false

		# Apply rotation
		rotation += rotation_speed * delta

	else:
		print("Velocity not initialized")

# Call this function to start the ball movement with initial position
func init_ball(start_pos: Vector2):
	start(start_pos)