Hello! Another question on raycasting/interaction. I want to implement an action when a mouse cursor to hover/click on a sprite3d/object. I want controls and script be attached to a camera3d. Taking Danganronpa room examination as a reference.
My clean try example for your convenience on Git
Unfo all tutorials on youtube i found are not clean enough or outdated. I tried to do it on my own and added debbug function with help of gpt. It says that no object detected while the code is alright. Here i stuck.
Mb I miss something or missunderstand it fundamentally? I see there is a RayCast3D node, what is it for? What’s the difference with other method i do? I appologies for being dumb, i really want to understand. I can make a youtube video when i figure it out afterward.
Do you know about physics picking?
It’s a way to get interactions between the mouse cursor and the 3D-world.
You could use CollisionObject3D._input_event() to get notified about mouse input events on collision objects without having to manually do a raycast.
Thats appeared to be unexpectedly easy.
Just like that and connect signal. Still will be good to understand manual thing, next step.
extends Area3D
func _on_input_event(_camera, event, _position, _normal, _shape_idx):
if event is InputEventMouseButton:
if event.pressed:
print("Horay!")
func _on_mouse_entered():
print("Mouse enter on: ", self.name)
# this to activate raycast
func _input(event):
if event.is_action_pressed("left_click"):
shoot_ray()
func shoot_ray():
# here we tell where to raycast is pointing adn from where
var mouse_pos = get_viewport().get_mouse_position()
var ray_length = 1000
var from = project_ray_origin(mouse_pos)
var to = from + project_ray_normal(mouse_pos) * ray_length
var space_state = get_world_3d().direct_space_state
# here i set params for intersect_ray
var params = PhysicsRayQueryParameters3D.new()
params.from = from
params.to = to
params.collide_with_areas = true # Set to true to include Area nodes
params.collide_with_bodies = true # Set to true to include PhysicsBody nodes (don't know if necessary)
var result = space_state.intersect_ray(params)
# here I try to see the result
if result and result.collider and result.collider.is_class("Area3D"):
result.collider.on_ray_hit()
else:
print("Raycast hit:", result.collider.name)
Unfortunately even “Else” clause not returning a result. What did i miss -_- ?
Well one of the branches of the if statement has to do something If not then make sure shoot_ray() is actually called. And that on_ray_hit() works properly whatever it’s supposed to do. The raycast code itself works for me.
If not then make sure shoot_ray() is actually called. And that on_ray_hit() works properly whatever it’s supposed to do. The raycast code itself works for me.