bezier-snippet.py

import bezier
import numpy as np

# press 'Setup Parameters' in the OP to call this function to re-create the parameters
def onSetupParameters(scriptOp):
	page = scriptOp.appendCustomPage('Custom')
	p = page.appendFloat('Val1', label='P1', size=3)

	page = scriptOp.appendCustomPage('Custom')
	p = page.appendFloat('Val2', label='P2', size=3)

	p = page.appendInt('Valpoints', label='Points')
	scriptOp.par.Valpoints.normMax = 1000
	scriptOp.par.Valpoints.normMin = 2
	return

# called on cook
def onCook(scriptOp):
	scriptOp.clear()
	
	# pars
	val1 = scriptOp.par.Val11.tuplet
	val2 = scriptOp.par.Val21.tuplet
	u_valPoints = scriptOp.par.Valpoints.eval()
	
	# we can move the point calculation step into another function
	points_array = calc_points_list(val1, val2, u_valPoints)

	# we only need to create the poly once
	poly = scriptOp.appendPoly(u_valPoints, closed=0, addPoints=True)
	
	# When then update the positions of the points on the poly
	for each_point in range(u_valPoints):
		poly[each_point].point.P = (points_array[0][each_point], points_array[1][each_point], 0)
	
	return

def calc_points_list(val1, val2, u_valPoints):
	# function from bezier_library
	nodes = np.asfortranarray([
	[val1[0].eval(), val1[1].eval(), val1[2].eval()],
	[val2[0].eval(), val2[1].eval(), val2[2].eval()],
	])

	curve = bezier.Curve(nodes, degree=2)
	s_vals = np.linspace(0.0, 1.0, u_valPoints)
	points_array = curve.evaluate_multi(s_vals)
	return points_array

thanks a lot