Master the Basics of Blender Python for Geo Nodes in Just One Video

This is a Blender Python Tutorial on the basics of using Python to create Geo Nodes! In this video, I will guide you through adding and connecting Geometry Nodes with Python, as well as updating the default input socket values.

Initial Code

Final Code

Geo Nodes Python documentation

00:00 - Intro
00:29 - Set up the workspace
01:24 - Add a mesh and a geo nodes modifier
02:50 - Create a reference to the node tree
03:40 - Get the group output node
04:16 - Add the Cube Mesh Geo Node
05:25 - Add the Subdivide Mesh Geo Node
06:30 - Update the position of the nodes
08:00 - Define links between nodes
11:00 - Refactor node creation code
13:37 - Add the Triangulate Geo Node
16:25 - Add the Split Edges Geo Node and the Scale Elements Geo Node
19:00 - Update Geo Node default inputs

#blender #python #scripting #tutorial #geometrynodes

[dolmenbretagne]

It's awesome ! I had started a little but now I understand the lack of knowledge that I had! Thank you very much we must continue to do this kind of

[SunshinePosseCrew]

Thanks for the videos! I would highly recommend writing a better from-to node link helper method where you can specify the from-to types in the function call. Here's what I wrote below:

#
def link_nodes_by_socket_type(node_tree, from_node, from_node_type, to_node, to_node_type):
node_tree.links.new(from_node.outputs[from_node_type], to_node.inputs[to_node_type])
#

With this, you can easily link the nodes in one line without updating from-to vars each time :-)

#
link_nodes_by_socket_type(node_tree, from_node = split_edges_node, from_node_type = "Mesh", to_node = separate_geometry_node, to_node_type = "Geometry")
#

[VladyVeselinov]

kinda sucks that there isn't a "formatGraph" function, setting x/y coordinates for nodes feels tedious

[aaayerus]

Hey CG Pyhton, plz make a video about importing and controlling the inputs of an already created geometry nodes file, making use of a custom n-menu panel.

[nicolassuarez]

Outstanding! Do you know how to export it as .gltf with materials to? Thanks!

[Pooriel]

Thanks for this awesome tutorial.
I have a problem with creating links between nodes.
linking geometry (green dots) input/outputs works as intended but it doesn't work when I create a link between two attribute (diamonds) input/outputs.
I checked the DATA API and saw that the links were actually created but they were kinda disabled (Is_Hidden is enabled and cannot be disabled).

[TPSNS]

thank you for the tutorial I only have one question how do you use Vim commands in blender

[abiuniverse]

How to add geometry node on a mesh created from json data in the python script

[avinashkaushik]

fantastic, , , , can you please make a video on python rigging

[VitalyBanny]

Nice lesson! Thanks! Is there a way to pan and zoom view of geometry node editor with python?

[Besvy-zxrz]

Its so troublesome to create geometry nodes, what are advantages in using blender python compare to geometry nodes editor

[havinthiranv]

can you make Blender python geo node tutorial for wrapping a object please, something like wrap master. I am trying to learn proceduralism in blender

[stefankarlssonse]

started looking for the version of Blender. Didnt find in description text or in the first 5 min of the video, so didnt continue.

[AliMohammadi-vg]

Hi sir, can you create a tutorial about matrix snapping for fk/ik snapp?

[PeterKonijnenbelt]

I am using Blenders Geometry Nodes to create models (not using python). When I have created a model using geometry nodes I would like to export all the coördinates from the vertices as processed in the Group Output. Is there a way to obtain the data using python (as is presented in the Spreadsheet)?

[ashlynmccann]

Thank you for the great tutorial! I used this as a foundation for some geo nodes I am using in an add on. However, I keep getting this error: {AttributeError: 'geo_nodes' object has no attribute 'node' } on the line where I define my out_node as group output. I am using Blender 3.5. Do you have any advice on solving this error? I am relatively new to blender and python

[surtvalheim]

Do you know how create a new modifier ? using class do not add the modifer in the add modifier list, even with MyModifier registered in the script as usual.