added CSG toolkit

addons/csg_toolkit/scripts/patterns/spiral_pattern.gd

@@ -0,0 +1,39 @@
+@tool
+class_name CSGSpiralPattern
+extends CSGPattern
+
+@export var turns: float = 2.0
+@export var start_radius: float = 0.5
+@export var end_radius: float = 5.0
+## If > 0 overrides vertical spread based on repeat & step
+@export var total_height: float = 0.0
+@export var use_radius_curve: bool = false
+@export var radius_curve: Curve
+@export var points: int = 32
+
+func _generate(ctx: Dictionary) -> Array:
+	var positions: Array = []
+	var template_size: Vector3 = ctx.get("template_size", Vector3.ONE)
+	var t_turns: float = max(0.1, turns)
+	var r_start: float = max(0.0, start_radius)
+	var r_end: float = max(r_start, end_radius)
+	var total: int = max(2, points)
+	if total <= 1:
+		return [Vector3.ZERO]
+	for i in range(total):
+		var t: float = float(i) / float(total - 1)
+		var angle = t * t_turns * TAU
+		var curve_t = t
+		if use_radius_curve and radius_curve and radius_curve.get_point_count() > 0:
+			curve_t = clamp(radius_curve.sample(t), 0.0, 1.0)
+		var radius = lerp(r_start, r_end, curve_t)
+		var y_pos: float = t * (total_height if total_height > 0.0 else template_size.y * 1.0)
+		positions.append(Vector3(
+			cos(angle) * radius,
+			y_pos,
+			sin(angle) * radius
+		))
+	return positions
+
+func get_estimated_count(ctx: Dictionary) -> int:
+	return max(2, points)