Updated helper functions

Author: eleanorcamp

helper.py

@@ -1,4 +1,4 @@
-from openalea.plantgl.all import NurbsCurve
+from openalea.plantgl.all import NurbsCurve, Vector3, Point2Array, Point3Array, Polyline2D, BezierCurve2D
 from openalea.lpy import Lsystem, newmodule
 from random import uniform, seed
 from numpy import linspace, pi, sin, cos
@@ -8,8 +8,8 @@ def amplitude(x): return 2
 
 def cut_from(pruning_id, s, path = None):
     """Check cut_string_from_manipulation for manual implementation"""
-    #s.insertAt(pruning_id, newmodule('F'))
-    s.insertAt(pruning_id, newmodule('%'))
+    s.insertAt(pruning_id, newmodule('F'))
+    s.insertAt(pruning_id+1, newmodule('%'))
     return s
 
 def cut_using_string_manipulation(pruning_id, s, path = None):
@@ -108,3 +108,20 @@ def create_noisy_circle_curve(radius, noise_factor, num_points=100, seed=None):
   curve_points = Point2Array(points)
   curve = Polyline2D(curve_points)
   return curve
+
+def create_bezier_curve(num_control_points=4, x_range=(0, 10), y_range=(-2, 2), seed_val=None):
+    if seed_val is not None:
+        seed(seed_val)  # Set the random seed for reproducibility
+    # Generate progressive control points within the specified ranges
+    control_points = []
+    prev_x = uniform(x_range[0], x_range[1] / 4)
+    for i in range(num_control_points):
+        x = prev_x + uniform(0, (x_range[1] - prev_x) / (num_control_points - i))
+        y = uniform(*y_range)
+        control_points.append(Vector3(x, y, 0))  # Set z to 0 for 2D curve
+        prev_x = x
+    # Create a Point3Array from the control points
+    control_points_array = Point3Array(control_points)
+    # Create and return the BezierCurve2D object
+    bezier_curve = BezierCurve2D(control_points_array)
+    return bezier_curve