add bone flattener

scripts/effects/bone_to_flatten.gd

@@ -0,0 +1,50 @@
+@tool
+class_name BoneToFlatten
+extends Resource
+
+@export var bone_names: PackedStringArray = []
+@export var amount_by_pitch_curve: Curve = Curve.new()
+@export var amount_by_yaw_curve: Curve = Curve.new()
+@export var consider_side: bool = false
+@export var yaw_fraction: float = 1
+
+@export_group("Position")
+@export var do_position: bool = false
+@export var position_x_amount: float
+
+@export_group("Rotation")
+@export var do_rotation: bool = false
+@export var rotation_x_amount: float
+@export var rotation_x_curve: Curve
+@export var mirror_rot_x: bool = false
+@export var consider_side_rot_x: bool = false
+@export var rotation_y_amount: float
+@export var rotation_y_curve: Curve
+@export var mirror_rot_y: bool = false
+@export var consider_side_rot_y: bool = false
+@export var rotation_z_amount: float
+@export var rotation_z_curve: Curve
+@export var mirror_rot_z: bool = false
+@export var consider_side_rot_z: bool = false
+
+@export_group("Scale")
+@export var do_scale: bool = false
+
+
+func get_angle_normalized(angle: Vector3) -> Vector3:
+	var normalized := Vector3.ZERO
+	normalized.y = angle.y / (PI / yaw_fraction)
+	normalized.x = angle.x / (PI / 2)
+	return normalized
+
+
+func get_amount(angle: Vector3) -> float:
+	if amount_by_pitch_curve == null or amount_by_yaw_curve == null:
+		return 0
+
+	var normalized := get_angle_normalized(angle)
+	var amount_by_yaw := amount_by_yaw_curve.sample(absf(normalized.y))
+	var amount := amount_by_pitch_curve.sample(absf(normalized.x)) * amount_by_yaw
+	if consider_side:
+		amount *= -signf(normalized.y)
+	return amount