how do i stop my 3d player from sliding down slopes? 3.5.1

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:bust_in_silhouette: Asked By Dylised

here is my code

extends KinematicBody

var mouse_sensitivity = 1
var joystick_deadzone = 0.2

var run_speed = 15 # Running speed in m/s
var walk_speed = run_speed / 1.8
var crouch_speed = run_speed / 4.5
var jump_height = 7

var current_speed = run_speed

var ground_acceleration = 15
var air_acceleration = 7
var acceleration = air_acceleration

var direction = Vector3()
var velocity = Vector3() # Direction with acceleration added
var movement = Vector3() # Velocity with gravity added

var gravity = 19
var gravity_vec = Vector3()

var snapped = false
var can_jump = true
var crouched = false
var can_crouch = true

Data:

var player_speed = 0
var falling_velocity = 0

func _ready():
Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)

func _input(event):
# Look with the mouse
if event is InputEventMouseMotion:
rotation_degrees.y -= event.relative.x * mouse_sensitivity / 18
$Head.rotation_degrees.x -= event.relative.y * mouse_sensitivity / 18
$Head.rotation_degrees.x = clamp($Head.rotation_degrees.x, -90, 90)

direction = Vector3()

func _physics_process(delta):
# Look with the right analog of the joystick
if Input.get_joy_axis(0, 2) < -joystick_deadzone or Input.get_joy_axis(0, 2) > joystick_deadzone:
rotation_degrees.y -= Input.get_joy_axis(0, 2) * 2
if Input.get_joy_axis(0, 3) < -joystick_deadzone or Input.get_joy_axis(0, 3) > joystick_deadzone:
$Head.rotation_degrees.x = clamp($Head.rotation_degrees.x - Input.get_joy_axis(0, 3) * 2, -90, 90)

# Direction inputs
direction = Vector3()

if Input.is_key_pressed(KEY_W):
	direction.z += -1
if Input.is_key_pressed(KEY_S):
	direction.z += 1
if Input.is_key_pressed(KEY_A):
	direction.x += -1
if Input.is_key_pressed(KEY_D):
	direction.x += 1
	
direction = direction.normalized()

#If we aren't using the keyboard, take the input from the left analog of the joystick
if direction == Vector3():
	direction.z = Input.get_joy_axis(0, 1)
	direction.x = Input.get_joy_axis(0, 0)
	
	# Apply a deadzone to the joystick
	if direction.z < joystick_deadzone and direction.z > -joystick_deadzone:
		direction.z = 0
	if direction.x < joystick_deadzone and direction.x > -joystick_deadzone:
		direction.x = 0

# Rotates the direction from the Y axis to move forward
direction = direction.rotated(Vector3.UP, rotation.y)

# Snaps the character on the ground and changes the gravity vector to climb
# slopes at the same speed until 45 degrees
if is_on_floor():
	if snapped == false:
		falling_velocity = gravity_vec.y
		land_animation()
	acceleration = ground_acceleration
	movement.y = 0
	gravity_vec = -get_floor_normal() * 10
	snapped = true
else:
	acceleration = air_acceleration
	if snapped:
		gravity_vec = Vector3()
		snapped = false
	else:
		gravity_vec += Vector3.DOWN * gravity * delta

if is_on_floor():
	if Input.is_key_pressed(KEY_SHIFT) or Input.get_joy_axis(0, 6) >= 0.6:
		current_speed = run_speed
	else:
		current_speed = walk_speed
	if crouched:
		current_speed = crouch_speed

if Input.is_key_pressed(KEY_SPACE) or Input.is_joy_button_pressed(0, JOY_XBOX_A):
	if is_on_floor() and can_jump:
		snapped = false
		can_jump = false
		gravity_vec = Vector3.UP * jump_height
else:
	can_jump = true

if is_on_ceiling():
	gravity_vec.y = 0

if Input.is_key_pressed(KEY_CONTROL) or Input.is_key_pressed(KEY_C) or Input.is_joy_button_pressed(0, JOY_XBOX_B):
	crouch_animation(true)
else:
	crouch_animation(false)

velocity = velocity.linear_interpolate(direction * current_speed, acceleration * delta)

movement.x = velocity.x + gravity_vec.x
movement.z = velocity.z + gravity_vec.z
movement.y = gravity_vec.y

movement = move_and_slide(movement, Vector3.UP)

player_speed = movement.length()

func land_animation():
var movement_y = clamp(falling_velocity, -20, 0) / 40

$LandTween.interpolate_property($Head/Camera, "translation:y", 0, movement_y, 0.1, Tween.TRANS_SINE, Tween.EASE_OUT)
$LandTween.interpolate_property($Head/Camera, "translation:y", movement_y, 0, 0.25, Tween.TRANS_SINE, Tween.EASE_IN_OUT, 0.1)
$LandTween.start()

func crouch_animation(button_pressed):
if button_pressed:
if not crouched:
$CrouchTween.interpolate_property($MeshInstance, “mesh:mid_height”, $MeshInstance.mesh.mid_height, 0.25, 0.2, Tween.TRANS_SINE, Tween.EASE_IN_OUT)
$CrouchTween.interpolate_property($CollisionShape, “shape:height”, $CollisionShape.shape.height, 0.25, 0.2, Tween.TRANS_SINE, Tween.EASE_IN_OUT)
$CrouchTween.interpolate_property($Head, “translation:y”, $Head.translation.y, 1.35, 0.2, Tween.TRANS_SINE, Tween.EASE_IN_OUT)
$CrouchTween.start()
crouched = true
else:
if crouched:
$CrouchTween.interpolate_property($MeshInstance, “mesh:mid_height”, $MeshInstance.mesh.mid_height, 0.75, 0.2, Tween.TRANS_SINE, Tween.EASE_IN_OUT)
$CrouchTween.interpolate_property($CollisionShape, “shape:height”, $CollisionShape.shape.height, 0.75, 0.2, Tween.TRANS_SINE, Tween.EASE_IN_OUT)
$CrouchTween.interpolate_property($Head, “translation:y”, $Head.translation.y, 1.6, 0.2, Tween.TRANS_SINE, Tween.EASE_IN_OUT)
$CrouchTween.start()
crouched = false

:bust_in_silhouette: Reply From: aeh_keine_ahnung

If stop_on_slope is true, body will not slide on slopes when you include gravity in linear_velocity and the body is standing still.

Try adding true as the third argument for move_and_slide():

movement = move_and_slide(movement, Vector3.UP,true)