init

addons/godot-xr-tools/player/fade/fade_collision.gd

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+@tool
+class_name XRToolsFadeCollision
+extends Node3D
+
+
+
+@export_category("Collison")
+
+## Layers to collide with
+@export_flags_3d_physics var collision_layers : int = 3
+
+## Collision distance at which fading begins
+@export var fade_start_distance : float = 0.3
+
+## Collision distance for totally obscuring the view
+@export var fade_full_distance : float = 0.15
+
+
+# Shape to use for collision detection
+var _collision_shape : Shape3D
+
+# Parameters to use for collision detection
+var _collision_parameters : PhysicsShapeQueryParameters3D
+
+# World space to use for collision detection
+var _space : PhysicsDirectSpaceState3D
+
+
+# Add support for is_xr_class on XRTools classes
+func is_xr_class(xr_name:  String) -> bool:
+	return xr_name == "XRToolsFadeCollision"
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	# Construct a sphere for the collision shape
+	_collision_shape = SphereShape3D.new()
+	_collision_shape.radius = fade_start_distance
+
+	# Construct the collosion parameters
+	_collision_parameters = PhysicsShapeQueryParameters3D.new()
+	_collision_parameters.collision_mask = collision_layers
+	_collision_parameters.set_shape(_collision_shape)
+
+	# Get the space to test collisions in
+	_space = get_world_3d().direct_space_state
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _physics_process(_delta : float) -> void:
+	# Update the collision parameters to include our global location
+	_collision_parameters.transform = global_transform
+
+	# Find closest collision
+	var results = _space.get_rest_info(_collision_parameters)
+	if "point" in results:
+		# Collision detected, calculate distance to closet collision point
+		var delta_pos = global_transform.origin - results["point"]
+		var length = delta_pos.length()
+
+		# Fade based on distance
+		var alpha := inverse_lerp(fade_start_distance, fade_full_distance, length)
+		XRToolsFade.set_fade(self, Color(0, 0, 0, alpha))
+	else:
+		# No collision
+		XRToolsFade.set_fade(self, Color(0, 0, 0, 0))