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February 10, 2023 22:18
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Blender script to decode embedded generative art content from a JPEG file inscribed in an ordinal
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# This script is part of the Shaderverse project. It is licensed under the MIT license. | |
# Author: @michaelgold | |
# Last Updataed: 2022-02-10 | |
# For a tutorial see: https://twitter.com/michaelgold/status/1622664031205990403 | |
# Instructions: | |
# 1. Open Blender | |
# 2. Click the Scripting tab at the top of the window | |
# 3. Select Text > New from the menut to create a new text file | |
# 4. Copy and paste the contents of this file into the new text file | |
# 5. Select Text > Run Script from the menu to run the script | |
# 6. Enter a seed value (each seed value will produce a different result) | |
# 7. Select a jpeg file that contains embedded generative content | |
# - some files to try: | |
# - seed 1000000, https://ordinals.com/inscription/e4dc672b6ad86c8587b921ec24a070243df61721b07e0ae80b122489c579b9a0i0 | |
# - seed 1000001, https://ordinals.com/inscription/7ed1598584f72d85294e8a001e8a7fb92fc0000e9bb2ffeec518e1f5bea258f2i0 | |
# - seed 1000010, https://ordinals.com/inscription/ffc2c418b4f5c9b88cc2cb842dc07ad1014e168f7ceb266ee9bf52c0a7d38322i0 | |
# - seed 1000011, https://ordinals.com/inscription/6dedd63b944b56d045c488cd35f84c0be855c5d74c5a6c79cc07dbd9ac29e959i0 | |
# 8. Try different seed values and different images to see what happens :) | |
import bpy | |
from bpy_extras.io_utils import ImportHelper | |
from bpy.props import StringProperty, BoolProperty, IntProperty | |
from bpy.types import Operator, PropertyGroup | |
from pathlib import Path | |
import tempfile | |
import os | |
class OT_MessageBox(bpy.types.Operator): | |
bl_idname = "gold.messagebox" | |
bl_label = "" | |
message: StringProperty( | |
name = "message", | |
description = "message", | |
default = '' | |
) | |
line2: StringProperty( | |
name = "message", | |
description = "message", | |
default = '' | |
) | |
def execute(self, context): | |
self.report({'INFO'}, self.message) | |
print(self.message) | |
return {'FINISHED'} | |
def invoke(self, context, event): | |
return context.window_manager.invoke_props_dialog(self, width = 400) | |
def draw(self, context): | |
self.layout.label(text=self.message) | |
self.layout.label(text=self.line2) | |
class OT_Form(bpy.types.Operator): | |
"""Display a form that prompts the user to enter a seed and select a jpeg file""" | |
bl_idname = "gold.form" | |
bl_label = "" | |
seed: IntProperty( | |
name="Seed", | |
description="Seed", | |
default=100000 | |
) | |
path: StringProperty( | |
name="JPEG", | |
description="Path to Directory", | |
default="", | |
maxlen=1024) | |
def remove_all_objects(self, context): | |
"""Remove all objects from scene""" | |
for obj in bpy.data.objects: | |
bpy.data.objects.remove(obj, do_unlink=True) | |
def find_geometry_nodes(self, object_ref: bpy.types.Object): | |
"""Find all geometry nodes in an object""" | |
geometry_node_objects = [] | |
object_name = object_ref.name | |
try: | |
object_modifiers = object_ref.modifiers.items() | |
except AttributeError as error: | |
raise Exception(f"{error}: for {object_name}") | |
for modifier in object_modifiers: | |
modifier_name = modifier[0] | |
modifier_ref = modifier[1] | |
if hasattr(modifier_ref, "node_group"): | |
node_group = modifier_ref.node_group | |
try: | |
if node_group.type == "GEOMETRY": | |
node_object = { | |
"object_name": object_name, | |
"object_ref": object_ref, | |
"modifier_name": modifier_name, | |
"modifier_ref": modifier_ref, | |
"node_group": node_group | |
} | |
geometry_node_objects.append(node_object) | |
except AttributeError as error: | |
raise Exception(f"{error}: Could not find a Node Group type in object: {object_name}. Did you add an empty geometry node modifier?") | |
return geometry_node_objects | |
def update_mesh(self, node_object): | |
"""Update the mesh of a geometry node object""" | |
self.set_node_inputs_from_seed(node_object) | |
object_name = node_object["object_name"] | |
object_ref = bpy.data.objects[object_name] | |
mesh_name = object_ref.data.name | |
mesh = bpy.data.meshes[mesh_name] | |
mesh.update() | |
def set_node_inputs_from_seed(self, node_object): | |
modifier = node_object["modifier_ref"] | |
node_group = modifier.node_group | |
object_name = node_object["object_name"] | |
if "seed" in node_group.inputs.keys(): | |
item_ref = node_group.inputs["seed"] | |
item_input_id = item_ref.identifier | |
modifier[item_input_id] = int(self.seed) | |
def update_geonodes(self, context): | |
"""find all geonodes then update the node object based on the generated metadata""" | |
geometry_node_objects = [] | |
# find all geonode objects | |
print("Finding all geometry nodes...") | |
for object_ref in bpy.data.objects.values(): | |
if object_ref is not None: | |
geometry_node_objects += self.find_geometry_nodes(object_ref) | |
print("Found {} geometry nodes".format(len(geometry_node_objects))) | |
# update all geonodes with metadata | |
for node_object in geometry_node_objects: | |
self.update_mesh(node_object) | |
print("Updated all geometry nodes") | |
def set_default_render_settings(self, context): | |
"""Set default render settings""" | |
bpy.data.scenes["Scene"].render.engine = 'CYCLES' | |
bpy.data.scenes["Scene"].cycles.device = 'GPU' | |
bpy.data.scenes["Scene"].cycles.preview_samples = 16 | |
bpy.data.scenes["Scene"].cycles.use_preview_denoising = True | |
bpy.data.scenes["Scene"].cycles.samples = 64 | |
bpy.data.scenes["Scene"].render.resolution_x = 1280 | |
bpy.data.scenes["Scene"].render.resolution_y = 1280 | |
def set_camera_view(self, context): | |
for area in bpy.context.screen.areas: | |
if area.type == 'VIEW_3D': | |
area.spaces[0].overlay.show_overlays = False | |
area.spaces[0].shading.type = 'RENDERED' | |
override = bpy.context.copy() | |
override['area'] = area | |
bpy.ops.view3d.view_camera(override) | |
def execute(self, context): | |
"""decode the blender data from the jpeg file and add it to the scene""" | |
self.remove_all_objects(context) | |
input_file = self.path | |
if input_file == "": | |
self.report({'ERROR'}, "No file selected") | |
return {'CANCELLED'} | |
with open(input_file, "rb") as input: | |
data = input.read() | |
start_pos = data.find(b"Blender File") | |
if start_pos != -1: | |
input.seek(start_pos + len(b"Blender File")) | |
temp_dir = tempfile.mkdtemp(suffix=None, prefix=None, dir=None) | |
blend_file = Path(temp_dir, "output.blend") | |
with open(blend_file, "wb") as blend: | |
blend.write(input.read()) | |
with bpy.data.libraries.load(blend.name) as (data_from, data_to): | |
data_to.objects = data_from.objects | |
for obj in data_to.objects: | |
if obj is not None: | |
bpy.context.scene.collection.objects.link(obj) | |
for obj in data_from.objects: | |
if obj is not None: | |
if obj.hide_render: | |
bpy.data.objects[obj.name].hide_render = True | |
bpy.data.objects[obj.name].hide_set(True) | |
else: | |
bpy.ops.gold.messagebox('INVOKE_DEFAULT', message="No Blender Data Found.", line2="Are you sure this is a JPEG with encoded generator content?") | |
self.update_geonodes(context) | |
self.set_default_render_settings(context) | |
self.set_camera_view(context) | |
return {'FINISHED'} | |
def invoke(self, context, event): | |
"""Invoke the form""" | |
return context.window_manager.invoke_props_dialog(self, width = 400) | |
def draw(self, context): | |
"""Draw the form fields""" | |
self.layout.label(text="Enter the seed and path to the jpeg file.") | |
self.layout.label(text="") | |
self.layout.prop(self, "seed", text="Seed") | |
row = self.layout.row() | |
row.prop(self, "path", text="JPEG") | |
browse = row.operator(OT_SelectFIle.bl_idname, text="", icon='FILE_FOLDER') | |
browse.seed = self.seed | |
class OT_SelectFIle(Operator, ImportHelper): | |
seed: IntProperty() | |
filter_glob: StringProperty(default='*.jpg;*.jpeg;*.png;*.tif;*.tiff;*.bmp', options={'HIDDEN'}) | |
bl_idname = "gold.select_file" | |
bl_label = "Browse" | |
def execute(self, context): | |
"""Run the form again with the new file path""" | |
bpy.ops.gold.form('INVOKE_DEFAULT', seed=self.seed, path=self.filepath) | |
return {'FINISHED'} | |
classes = [OT_SelectFIle, OT_MessageBox, OT_Form] | |
def register(): | |
for cls in classes: | |
bpy.utils.register_class(cls) | |
def unregister(): | |
for cls in classes: | |
bpy.utils.unregister_class(cls) | |
if __name__ == "__main__": | |
register() | |
bpy.ops.gold.form('INVOKE_DEFAULT') |
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