API

The Blender Python API provides the ability to append or link objects from another *.blend file to the current scene using the “append” command.

To append an object (for example – a mesh) from another .blend file, we need to do the following:

How to append an object from another blend file to the scene using the Blender Python APIRead More »

Blender Python API autocomplete modules: fake-bpy-modules by Nutti update – added branch for Blender 2.90.

Last release: 2020.08.12.

Author GitHub: https://github.com/nutti/fake-bpy-module

Only files (without pip installation) https://github.com/Korchy/blender_autocomplete

In scripts and add-ons for importing-exporting files with formats that are not supported in Blender by default, we must give the user an ability to select files using the “FileBrowser” interface.

To open the file browser window, and after the user selects the necessary file, to return the path to it, we need to use the “ImportHelper” and the “ExportHelper” classes.

Using the FileBrowser interface window to opening and saving filesRead More »

To add custom mesh to the scene through the Blender Python API we need to do the following:

Open the “Text Editor” window.

How to create mesh through the Blender Python APIRead More »

For add-ons development, sometimes it is necessary to use packages that are not included in the core set of the Blender Python interpreter. Most often, the dependencies you need are included in the Python Package Index (PyPI) and can be installed to Blender through the Pip package management system.

For Windows 10 see the updated version of this article.

The Pip Package Manager is already installed in Blender. However, Blender does not allow us to install the desired packages in a common way with the “pip install package_name” command.

How to install required packages to the Blender Python with pipRead More »

Blender Python API autocomplete modules by Nutti update – added branch for Blender 2.83.

Last release: 2020.07.24.

Author GitHub: https://github.com/nutti/fake-bpy-module

Only files (without pip installation) https://github.com/Korchy/blender_autocomplete

For objects rotation, we can use the “rotation_euler” property. This property is a list of three items, each of them corresponds to the rotation angle around the X, Y, and Z-axis. The otation_euler[0] contains the rotation angle around the X-axis, rotation_euler[1] – around the Y-axis, and rotation_euler[2] – around the Z-axis. To rotate an object we must set a rotation angle to the appropriate field of the property.

For example, to rotate an active object around the X-axis to the 90 degrees angle we must execute the following command:

math.radians is used to convert degrees to radians.

The flat/smooth shading mode is regulated through the “use_smooth” property of each polygon of the mesh.

To enable smooth shading we need to set the “use_smooth” property of each mesh polygon to “True”.

For active object:

To enable flat shading – set the “use_smooth” property of each polygon to “False”.

To make new shading mode visible – force update mesh data:

To switch to the view from the active camera we can execute the following command:

This operator works in the toggle mode, so the next executing of the same command returns the view to the previous state.

Switching to the view from camera throug the python APIRead More »

To switch from a global coordinate system to a local coordinate system of an object, we need to multiply the global coordinates by the inverted matrix of an object:

To switch from the local coordinate system of the object to the global coordinate system, we need to multiply the local coordinates by the matrix of an object: