API

The geometry of objects in Blender is always built around the origin – a point that is taken as the starting point in the object’s local coordinate system. And if the origin does not lie in the plane of the object’s base, it can be difficult to place this object on the surface of another object. We can quickly set the origin to the bottom for all selected objects in the scene, writing a script using the Blender Python API.

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Aligning the origin to the bottom for all selected objects using the Blender Python APIRead More »

Animation keys can be set on scene objects either manually (by pressing the “i” key) or using the Blender Python API, for this purpose the developers have provided the keyframe_insert() function.

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Adding animation keys to an object in Blender using Python APIRead More »

Most often, we need to clear custom normals when importing objects from external scenes. We can remove custom normals manually by selecting meshes in the scene and pressing the Clear Custom Split Normals Data button in the Properties panel on the Data tab of the object. However, if there are many such objects, we can write a simple script using Blender Python API that will quickly clear the normals on all selected objects.

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Removing custom normals from all selected objects in BlenderRead More »

When developing add-ons for Blender, we may need to programmatically switch 3D viewport modes – for example, enable the WIREFRAME grid display mode.

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Switching 3D viewport modes programmatically using Blender Python APIRead More »

Assigning and removing modifiers in Blender is done separately for each object. However, if we need to, for example, remove a modifier from many objects in a complex scene, removing them from each object individually will be long and inefficient. Using the Blender Python API, we can write a simple script that will remove modifiers from all selected objects in the scene.

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Removing a modifier from all selected objects using Blender Python APIRead More »

Unfortunately, the developers have not yet provided access to the Quick Favorites menu via the Python API in Blender. However, it is possible to transfer the entire menu to the user panel. We can simply draw the Quick Favorites content on the user panel layout.

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Moving buttons from the Quick Favorites menu to the user panelRead More »

To work with geometry in Blender using the Python API, it is often necessary to find the center point of a polygon. This may be necessary for organizing various bindings, aligning objects along a polygon, positioning, and in many other cases.

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Finding the center of a polygonRead More »

We may need to get the rotation matrix from one vector to another in 2D space, for example, when working with UV maps. This is often necessary to adjust one UV island to another.

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The rotation matrix from one vector to another in 2D spaceRead More »

To sort the list of materials in the object’s material slots in Blender in the desired way, for example, alphabetically, we can use the function we created earlier to switch materials in material slots.

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Sorting materials in material slots alphabeticallyRead More »

To move a material from one material slot to another, we can click the up or down arrow button in the object’s material panel. In this case, the material in the currently selected slot will move up (or down) by one position. This method of moving and sorting materials is very slow and not very convenient.

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Moving a material from one object material slot to another in BlenderRead More »