Blender Plot3D

Lissajous-bpy.py

# This script is based on the following discussion.
# https://blenderartists.org/t/how-do-i-create-a-simple-curve-in-python/477260/5

import bpy
import numpy as np
import math
import mathutils


def Lissajous(t, a=1, b=2, delta=0):
    x = np.cos(a * t)
    y = np.sin(b * t + delta)
    return (x, y)


def makeSpline(cu, typ, points):
    spline = cu.splines.new(typ)
    npoints = len(points)

    if typ == 'BEZIER' or typ == 'BSPLINE':
        spline.bezier_points.add(npoints - 1)
        for (n, pt) in enumerate(points):
            bez = spline.bezier_points[n]
            (bez.co, bez.handle1, bez.handle1_type,
             bez.handle2, bez.handle2_type) = pt
    else:
        spline.points.add(npoints - 1)    # One point already exists?
        for (n, pt) in enumerate(points):
            spline.points[n].co = pt

    return

cu = bpy.data.curves.new("MyCurve", "CURVE")
ob = bpy.data.objects.new("MyCurveObject", cu)
bpy.context.scene.collection.objects.link(ob)


ps = []

for t in np.linspace(0, 2.0 * np.pi, endpoint=True):
    x, y = Lissajous(t, a=1, b=2)
    ps.append((x, y, np.sin(t), 1))

print(ps)
# scn = bpy.context.scene
# scn.objects.link(ob)
# scn.objects.active = ob

cu.dimensions = "3D"

# makeSpline(cu, "NURBS", [(0, 0, 0, 1), (0, 0, 1, 1),
#                          (0, 1, 1, 1), (1, 4, 1, 1)])

makeSpline(cu, "NURBS", ps)