Impulsing to especific direction and problems with velocity

Help Physics
, , ,
1

Godot Version

4.3

Question

i want to make a game about being a gun, so the charecter rotate to the mouse position. The problem is: when i shot, the idea is tha i’m thrown to the oposite direction, but idk how to calculate this vector

here’s my code:

extends CharacterBody2D

@onready var node_2d = $Node2D

var force = 10
var gravity = 570

func _physics_process(delta):

velocity.y = gravity

var mouse_position = get_global_mouse_position()
var dir = (mouse_position - position).normalized()
rotation = dir.angle()

if Input.is_action_just_pressed(“shoot”):
shoot(dir,mouse_position)

move_and_slide()

func shoot(direction: float,mouse_position):

velocity = velocity * direction

2

It would better if you use RigidBody for it.

3

You can get the opposite direction with just a minus sign in front of your direction.

var opposite_direction = -direction
2 Likes
4

Ok let me try

5

I’m gonna try it too

6

I think that using the rigid body could work better than the past two times (characterBody n physicsBody) and then i got the idea that for evite accumulation of impulse, before i add it i set the velocity to complete zero and then apply the impulse

Do you think it could work? (Guess there’s only one way to know)

EDIT: that did not worked

7

What do you mean it didn’t work? Was there an error? Did it look wrong? Behave wrong?
Please be specific.
And share your code using the preformatted text with ```

1 Like
8

it still accumulate impulse

extends RigidBody2D

@onready var node_2d = $Node2D
@onready var tile_map_layer = $“…/TileMapLayer”

var force = 7
var can_move = true

var linear_vel_x = clamp(0,0,200)
var linear_vel_y = clamp(0,0,200)

func _physics_process(delta):
print(get_linear_velocity())

var mouse_position = get_global_mouse_position()
var dir = ((mouse_position - position).normalized()).angle()
rotation = dir

if Input.is_action_just_pressed(“shoot”):
shoot(dir,mouse_position)

if !can_move:
linear_velocity = Vector2(0,0)

func shoot(direction: float, mouse_position):
var impulse: Vector2

impulse = (node_2d.global_position - mouse_position) * force

print(direction)
if can_move:
set_linear_velocity(Vector2(0,0))
apply_central_impulse(impulse)

9

this worked too

10

what if i limited my velocity?
(and how do i do that?)
@wchc

11

@KingGD
i tried limitating my velocity, but i think i’m missing something, because now my gravity is also limited AND it still accumulate velocity.

extends RigidBody2D

@onready var node_2d = $Node2D
@onready var tile_map_layer = $“…/TileMapLayer”

var force = 7
var can_move = true

var max_vel_x = 200
var max_vel_y = 200

func _physics_process(delta):
print(get_linear_velocity())

if get_linear_velocity().x > max_vel_x:
linear_velocity.x = max_vel_x
if get_linear_velocity().y > max_vel_y:
linear_velocity.y = max_vel_y

var mouse_position = get_global_mouse_position()
var dir = ((mouse_position - position).normalized()).angle()
rotation = dir

if Input.is_action_just_pressed(“shoot”):
shoot(dir,mouse_position)

if !can_move:
linear_velocity = Vector2(0,0)

func shoot(direction: float, mouse_position):
var impulse: Vector2

impulse = (node_2d.global_position - mouse_position) * force

print(direction)
if can_move:
apply_impulse(impulse,Vector2.ZERO)

func _on_area_2d_body_entered(body):
if body == tile_map_layer:
can_move = false

12

How you tried to limit the velocity?
And it would better if you write the codes in proper format like this:

``` I used this symbols for code format ```
2 Likes
13

Forget, it i was doing it for the pirate software game jam, and i was already thinking about quitting so I’m out, thanks for the both of you @KingGD and @wchc, if anyone’s reading this for getting help after make your on post.
Bye

2 Likes