Need Help with space_state.intersect_ray()

Help Programming
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1

Godot Version 4.4

So I’ve Followed This Tutorial on how to make mouse aiming in a top down game and added “var query = PhysicsRayQueryParameters3D.create(RayOrigin, RayEnd); var Intersection = SpaceState.intersect_ray(query)” to it as suggested by the top comment.

However I now get the Error Line 20:There is already a variable named "Intersection" declared in this scope. Wich is var Intersection = space_state.intersect_ray(rayOrigin, rayEnd)
so I remove the var from it but then suddenly 5 more errors pop up

Line 18:Identifier "RayOrigin" not declared in the current scope.
Line 18:Identifier "RayEnd" not declared in the current scope.
Line 18:Identifier "SpaceState" not declared in the current scope.
Line 20:Too many arguments for "intersect_ray()" call. Expected at most 1 but received 2.
Line 24:Cannot find member "y" in base "Translation".

Help Please!!

My Code:

extends CharacterBody3D

const SPEED = 5.0
const JUMP_VELOCITY = 4.5
var rayOrigin = Vector3()
var rayEnd = Vector3()

@onready var camera: Camera3D = $Camera

var aim_direction: Vector3 = Vector3.ZERO

func _physics_process(_delta: float) -> void:
	var space_state = get_world_3d().direct_space_state
	var mouse_position = get_viewport().get_mouse_position()
	
	rayOrigin = camera.project_ray_origin(mouse_position)
	rayEnd = rayOrigin + camera.project_ray_normal(mouse_position) * 2000
	var query = PhysicsRayQueryParameters3D.create(RayOrigin, RayEnd); var Intersection = SpaceState.intersect_ray(query)
	
	var Intersection = space_state.intersect_ray(rayOrigin, rayEnd)
	
	if not Intersection.is_empty():
		var pos = Intersection.position
		$Mesh.look_at(Vector3(pos.x, Translation.y, pos.z), Vector3(0, 1, 0))
	
	var input_dir := Input.get_vector("left", "right", "up", "down")
	var direction: Vector3 = (transform.basis.x * input_dir.x + transform.basis.z * input_dir.y).normalized()
	
	if direction != Vector3.ZERO:
		velocity.x = direction.x * SPEED
		velocity.z = direction.z * SPEED
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
		velocity.z = move_toward(velocity.z, 0, SPEED)

	move_and_slide()
2

Seems like this line is two statements mashed together, I belive you want to delete the latter half of it.

1 Like
3

So Like this

	rayOrigin = camera.project_ray_origin(mouse_position)
	rayEnd = rayOrigin + camera.project_ray_normal(mouse_position) * 2000
	var query = PhysicsRayQueryParameters3D.create(RayOrigin, RayEnd)
	var Intersection = SpaceState.intersect_ray(query)
	
	var Intersection = space_state.intersect_ray(rayOrigin, rayEnd)

or Like this?

	rayOrigin = camera.project_ray_origin(mouse_position)
	rayEnd = rayOrigin + camera.project_ray_normal(mouse_position) * 2000
	var query = PhysicsRayQueryParameters3D.create(RayOrigin, RayEnd)
	var Intersection = SpaceState.intersect_ray(query)
4

When I do this

rayOrigin = camera.project_ray_origin(mouse_position)
	rayEnd = rayOrigin + camera.project_ray_normal(mouse_position) * 2000
	var query = PhysicsRayQueryParameters3D.create(RayOrigin, RayEnd)
	var Intersection = SpaceState.intersect_ray(query)
	
	var Intersection = space_state.intersect_ray(rayOrigin, rayEnd)

I get the Errors

Line 21:There is already a variable named "Intersection" declared in this scope.

But when I do this

rayOrigin = camera.project_ray_origin(mouse_position)
	rayEnd = rayOrigin + camera.project_ray_normal(mouse_position) * 2000
	var query = PhysicsRayQueryParameters3D.create(RayOrigin, RayEnd)
	var Intersection = SpaceState.intersect_ray(query)

I get the Errors

Line 18:Identifier "RayOrigin" not declared in the current scope.
Line 18:Identifier "RayEnd" not declared in the current scope.
Line 19:Identifier "SpaceState" not declared in the current scope.
Line 23:Cannot find member "y" in base "Translation".
5

These errors are very solveable, you don’t have a capital RayOrigin but you do have a rayOrigin variable, so you probably want to use the same capitalization.

6

Man this is Embarassing, thanks I was able to solve all but one

Line 24:Cannot find member "y" in base "Translation".

The Line in Question

$Mesh.look_at(Vector3(pos.x, Translation.y, pos.z), Vector3(0, 1, 0))
7

I don’t know how you defined “Translation”, you might be trying to get the y value of the translator type which is a supposed to be a different language to release your game in, like spanish or french.

I don’t know what exactly you want the mesh to look_at either so I’m not sure wht substitute you want. I would guess replacing Translation.y with global_position.y to always look on the same plane as the player, or just use pos whole sale.

# planar look
$Mesh.look_at(Vector3(pos.x, global_position.y, pos.z), Vector3.UP)
# direct look
$Mesh.look_at(pos, Vector3.UP)
8

You just made my day, thank you so much man!
Hope you have a great weekend