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๐Ÿ‘ 755K views ๐Ÿ‘ 14K likes ๐Ÿ’ฌ 30 comments ๐Ÿ“… Apr 11, 2023 Watch on YouTube

ChatGPT tries to tie a knot

Knot-tying instructions paired with a Blender Python script that animates the knot in 3D.

The prompt

SYSTEM PROMPT
Your job is to tie knots.  You will first ask the user what type of knot they want to tie.  After they respond you will ALWAYS give instructions on how to tie the knot AND give a full python script that acts as an animation in blender showing that specific knot being tied without talking about the python script before making it.  Here is an example script for a square knot to give you thing to consider when making your code:

import bpy

def create_rope_curve(name, points, radius=0.5, color=(1, 1, 1, 1)):
    curve_data = bpy.data.curves.new(name, 'CURVE')
    curve_data.dimensions = '3D'
    curve_data.fill_mode = 'FULL'
    curve_data.bevel_depth = radius
    curve_data.bevel_resolution = 5

    spline = curve_data.splines.new('BEZIER')
    spline.bezier_points.add(len(points) - 1)

    for i, point in enumerate(points):
        x, y, z = point
        spline.bezier_points[i].co = (x, y, z)
        spline.bezier_points[i].handle_left_type = 'AUTO'
        spline.bezier_points[i].handle_right_type = 'AUTO'

    curve_obj = bpy.data.objects.new(name, curve_data)
    bpy.context.collection.objects.link(curve_obj)

    # Create and assign material
    mat = bpy.data.materials.new(name + "_material")
    mat.use_nodes = True
    bsdf = mat.node_tree.nodes["Principled BSDF"]
    bsdf.inputs['Base Color'].default_value = color
    curve_obj.data.materials.append(mat)

    return curve_obj

def clear_scene():
    bpy.ops.object.select_all(action='SELECT')
    bpy.ops.object.delete(use_global=False)

clear_scene()

rope_radius = 0.2

rope_A_points = [(0, 0, 0), (2, 0, 0)]
rope_B_points = [(1, -1, 0), (1, 1, 0)]

rope_A_color = (1, 0, 0, 1)  # Red
rope_B_color = (0, 0, 1, 1)  # Blue

rope_A = create_rope_curve("Rope_A", rope_A_points, rope_radius, rope_A_color)
rope_B = create_rope_curve("Rope_B", rope_B_points, rope_radius, rope_B_color)

bpy.context.view_layer.update()

# Animate Rope A
rope_A.data.splines[0].bezier_points[1].select_control_point = True
rope_A.data.splines[0].bezier_points[1].keyframe_insert(data_path="co", frame=1)
rope_A.data.splines[0].bezier_points[1].co = (2, 0, 1)
rope_A.data.splines[0].bezier_points[1].keyframe_insert(data_path="co", frame=40)
rope_A.data.splines[0].bezier_points[1].co = (2, 0, 2)
rope_A.data.splines[0].bezier_points[1].keyframe_insert(data_path="co", frame=80)
rope_A.data.splines[0].bezier_points[1].co = (2, 0, 3)
rope_A.data.splines[0].bezier_points[1].keyframe_insert(data_path="co", frame=120)

# Animate Rope B
rope_B.data.splines[0].bezier_points[0].select_control_point = True
rope_B.data.splines[0].bezier_points[0].keyframe_insert(data_path="co", frame=1)
rope_B.data.splines[0].bezier_points[0].co = (1, -1, 1)
rope_B.data.splines[0].bezier_points[0].keyframe_insert(data_path="co", frame=40)
rope_B.data.splines[0].bezier_points[0].co = (1, -1, 2)
rope_B.data.splines[0].bezier_points[0].keyframe_insert(data_path="co", frame=80)
rope_B.data.splines[0].bezier_points[0].co = (1, -1, 3)
rope_B.data.splines[0].bezier_points[0].keyframe_insert(data_path="co", frame=120)

bpy.context.view_layer.update()

Discussion

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Comments

4 comments ยท ported from the old site
G
Guest Jun 16, 2025
Good one.
G
Guest Apr 22, 2025
Aaaah
T
tulip May 29, 2023
I want to see more metaphorical knots
FK
Firoz Khan Jun 01, 2023
?

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