User:Paradox-01/Blender/Research
Blender horror reloaded
Random session #1
Script log
Almost all actions in Blender get logged. You need to open the "info" window to see it.
bpy.ops.mesh.primitive_cube_add(size=2, enter_editmode=False, align='WORLD', location=(0, 0, 0), scale=(1, 1, 1))
Python console
Logged commands can be copied into the python console. Press enter key to execute.
Actual script files can be run like this but look out for pitfalls.
filename = "/full/path/to/myscript.py" exec(compile(open(filename).read(), filename, 'exec'))
You can translate file paths you get from Explorer's address bar by turning "\" into "\\".
Text editor window
You can collected logged commands in a python file if you use the text editor.
What to test it? Pressing the play button. Ups, it gave an error? But where is the fricking System Console to see the actual error?
A google search later:
Window > Toggle System Console
Traceback (most recent call last): File "\cube.py", line 1, in <module> NameError: name 'bpy' is not defined Error: Python script failed, check the message in the system console
It might by kind of counter intuitive because you are already in Blender but - as this error shows - you need to import any library used by the code.
import bpy bpy.ops.mesh.primitive_cube_add(size=2, enter_editmode=False, align='WORLD', location=(0, 0, 0), scale=(1, 1, 1))
No drag and drop support
Unbelievable, but after all these years drag and drop is still not supported.
If you try to drop a DAE or OBJ into the viewport it shows a plus icon but nothing will happen after the drop.
Would it be reasonable to program a workflow using another GUI and targeting Blender via command line?
Let's see... The idea with XSI was to sort "functional" objects under different layers.
Unfortunately Blender doesn't log that. When you hide/show a layer (nowadays a.k.a. "collection") you will see this:
bpy.data.scenes["Scene"].(null) = True bpy.data.scenes["Scene"].(null) = False
Yea what an useless log. Documentation where are you? https://docs.blender.org/manual/en/latest/scene_layout/object/properties/instancing/collection.html?highlight=collection#basic-usage
No helpful for scripting. Google? https://blender.stackexchange.com/questions/158998/how-to-hide-one-level-for-all-collections-with-python
Oh wait, there's the scripting ... only a little more useful ... https://docs.blender.org/api/current/bpy.types.LayerCollection.html#bpy.types.LayerCollection.hide_viewport
import bpy bpy.context.layer_collection.children['Collection'].hide_viewport = True
So far so good.
To place an object on a specific layer into a specific collection we have to create it or set it active.
- create obj on new layer
import bpy
collection = bpy.data.collections.new('My Collection3')
bpy.context.scene.collection.children.link(collection)
# NOTE the use of 'collection.name' to account for potential automatic renaming
layer_collection = bpy.context.view_layer.layer_collection.children[collection.name]
bpy.context.view_layer.active_layer_collection = layer_collection
bpy.ops.mesh.primitive_plane_add(enter_editmode=False, align='WORLD', location=(0, 0, 0), scale=(1, 1, 1))
- create obj on existing layer
import bpy layer_collection = bpy.context.view_layer.layer_collection.children["Collection9"] bpy.context.view_layer.active_layer_collection = layer_collection bpy.ops.mesh.primitive_plane_add(enter_editmode=False, align='WORLD', location=(0, 0, 0), scale=(1, 1, 1))
- just get the active collection
import bpy
print(bpy.context.view_layer.active_layer_collection.collection)
#<bpy_struct, Collection("Collection9") at 0x000001E090E84B88>
# geez... next stop regex to get content betwee the quote signs
# https://blender.stackexchange.com/questions/44382/blender-python-select-an-object-with-the-sequence-of-letters-in-a-name
Outliner
When click the second icon (Display Mode) of the Outliner you can change the Layer View to Data API. This might be helpful for logging one or another command by toying around in properties.
Random session #2
More Python
Remember to ... Edit > Preferences
Interface: Display: Edit[x] Python Tooltips
Python-generated UI
Reading for later:
windows, tabs, panels
UI:
Scripting:
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Random session #3
The idea is to give function objects (CJBO) a dynamic context menu, either by analyzing its given collection name and/or further tags/properties given to the object.
Reading for later:
- https://docs.blender.org/manual/en/latest/addons/interface/context_menu.html
- https://blenderartists.org/t/context-sensitive-menu-in-blender/515689
[...]