Blender 3D: tutorials, articles, tips, notes
To manipulate object transformations with matrices, Blender includes the “mathutils” module in which the “Matrix” class is defined. With this class, you can simply create the necessary transformation matrices – translation, rotation, and scale.
The following command is used to create a scale matrix:
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from mathutils import Matrix scale_matrix = Matrix.Scale(SCALE_VALUE, MATRIX_SIZE, AXIS) |
The classic way of localizing a Blender add-on (translating it into different languages) is convenient because requires just a single Blender Python API call – to get the currently used locale. This way is maximum universal, but Blender would not be Blender if it did not provide users an ability to localize add-ons through its own API.
The principle of creating multilingual add-ons using the Blender Python API is not much different from the classical one – we need to create a dictionary with all the variants of translations for all text strings from our add-on and use this dictionary in the localization.
Continue reading “Localization of Blender add-ons – with API”
When referring to the mesh geometry – its vertices, edges, and polygons, Blender operates with the original data without the usage of modifiers added to the object.
For example, the number of vertices of the active object, we can get with the following command:
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len(bpy.context.active_object.data.vertices) |
And it will be returned without considering the object’s Subdivision modifier, which modifies the mesh’s geometry, increasing it.
Blender add-on “Save Selected” updated to v. 1.0.2.
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In order to navigate to an URL-address from Blender – to open the required address in the browser, we can use the system operator “wm.url_open”.
To demonstrate this let’s create a simple tab in the N-panel with a single button, by clicking on which the required page will be opened in the browser.
Continue reading “How to make an url button in Blender interface”
Blender add-on “Specification sheet” updated to v. 1.1.0.
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Gumroad |
To have the access to the current context, for example, to work with operators, and to the scene data, for example, to work with meshes, we use two predefined structures from the Blender Python API: “bpy.context” and “bpy.data”.
For example, we can pass them to a function:
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import bpy def my_func(context, scene_data): print(context, scene_data) my_func( context=bpy.context, scene_data=bpy.data ) # <bpy_struct, Context at 0x00000000050EF568> <bpy_struct, BlendData at 0x0000000007FA6408> |
However, in the “bpy.context” structure there is a “blend_data” pointer that links to the scene data. With this pointer, we can access scene data without passing it separately and explicitly.
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import bpy def my_func(context): print(context, context.blend_data) my_func( context=bpy.context, ) # <bpy_struct, Context at 0x00000000050EF568> <bpy_struct, BlendData at 0x0000000007FA6408> |
Blender add-on “TimeMe” v.1.3.0 update.
In Blender, we can select and deselect mesh vertices through the “select” property for each vertex.
However, to deselect a vertex, it is not enough to set it’s “select” property to “False”
Blender add-on “Save Selected” updated to v. 1.0.1.
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If you want your add-on to be available for all Blender users around the world, you need to make the localization – translation of its interface into different languages.
The simplest way to make your add-on multilingual is the classic way, it is used in many other programs and requires the minimal usage of the Blender Python API.
Continue reading “Localization of Blender add-ons – classical way”
We can delete collections in Blender through the “collections” list in “bpy.data”.
To remove a collection we need to use the “remove” method from the collections list, specifying the collection to be removed in the parameter:
Continue reading “Removing collections through the Blender Python API”
Blender add-on “Area Switcher” updated to v. 1.1.0.
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We can assign constraints to objects through the object “constraints” property.
To add a constraint to the currently active object, we need to create a new constraint in the object’s “constraints” list, specifying its type in the parameters:
Continue reading “How to add a constraint to the object with Blender Python API”
Blender add-on “EEVEE Materials Override” updated to v. 1.3.0.
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Gumroad |
Since Blender 2.80 the deselect all function – complete deselection of all objects or geometry – has been switched from a single press of the “a” key to a double “a-a” or a combination of “alt+a” keycodes. To return the deselection function to a single “a” press, we can edit the settings of the selection operators. Or, since Blender 2.81, a special checkbox is provided for this in the keyboard shortcuts settings.
Now the selection of all objects/geometry and their total deselection will be performed by pressing the single “a” key.
“Save Selected” – Blender 3D add-on that allows saving selected objects in the scene into a separate *.blend file.
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Blender add-on “M-Cleaner” updated to v. 1.3.2.
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Blender add-on “Neoner” updated to v. 1.1.2.
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The “Search Plus” add-on appends a panel to the Blender 3D interface for quick search in Google, Blender Stack Exchange, and YouTube.
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Blender add-on “NodeTree Source” updated to v. 1.0.2.
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Gumroad |
Blender Python API autocomplete modules: fake-bpy-modules by Nutti update – added branch for Blender 2.91.
Last release: 2020.12.16.
Author GitHub: https://github.com/nutti/fake-bpy-module
Only files (without pip installation) https://github.com/Korchy/blender_autocomplete
“Trello Connect” is a Blender add-on to access Trello boards, lists, and cards directly from Blender.
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