gd: added input addon

addons/guide/modifiers/guide_modifier_curve.gd

@@ -0,0 +1,51 @@
+@tool
+## Applies a separate curve to each input axis.
+class_name GUIDEModifierCurve
+extends GUIDEModifier
+
+
+## The curve to apply to the x axis
+@export var curve: Curve = default_curve()
+
+## Apply modifier to X axis
+@export var x: bool = true
+
+## Apply modifier to Y axis
+@export var y: bool = true
+
+## Apply modifier to Z axis
+@export var z: bool = true
+
+
+## Create default curve resource with a smoothstep, 0.0 - 1.0 input/output range
+static func default_curve() -> Curve:
+	var curve = Curve.new()
+	curve.add_point(Vector2(0.0, 0.0))
+	curve.add_point(Vector2(1.0, 1.0))
+
+	return curve
+
+
+func _modify_input(input: Vector3, delta: float, value_type: GUIDEAction.GUIDEActionValueType) -> Vector3:
+	# Curve should never be null
+	if curve == null:
+		push_error("No curve added to Curve modifier.")
+		return input
+
+	if not input.is_finite():
+		return Vector3.INF
+
+	# Return vector with enabled axes modified, others remain unchanged.
+	return Vector3(
+		curve.sample(input.x) if x else input.x,
+		curve.sample(input.y) if y else input.y,
+		curve.sample(input.z) if z else input.z
+	)
+
+
+func _editor_name() -> String:
+	return "Curve"
+
+
+func _editor_description() -> String:
+	return "Applies a curve to each input axis."