The easiest way to split the user interface into several visual groups is to registers several separate panels in the Blender Python API and merge them by setting the same “bl_category” parameter. In this case, we get some arranged vertically panels, which can be independently collapsed and expanded.
With Geometry Nodes in Blender is easy to create additional custom attributes for objects and transfer the necessary data to them. However, there is no direct access to such created attributes.
Accessing custom attributes created in Geometry NodesRead More »
There are two ways to create a copy of an object in a scene:
Making a copy of an object using the Blender Python APIRead More »
Input parameters from Blender Geometry Nodes are automatically placed on the “Geometry Nodes” modifier panel in the “Properties” window on the modifier tab. However, this tab is not always open, and it is not always convenient to switch to it to adjust values. For quick access to the input parameters of Geometry Nodes, we can duplicate them on the custom panel in the 3D Viewport window.
How to show parameters from Geometry Nodes inputs on a custom UI panelRead More »
It can be difficult to quickly find and select the scene camera from many other objects in large scenes. However, we can make an operator and assign its call to a hotkey to find the scene camera in a moment.
To hide an object in the 3D Viewport window for the current scene we use the “object.hide_view_set” operator, which calls when we clicking the icon with an “eye” in the outliner. However, to hide the object in the viewport for all scenes of the project at once (clicking on the icon with the “monitor” image) a special operator is not provided. We can make it ourselves.
Operators for globally hiding objects in all project scenesRead More »
The Blender API recommends creating custom object properties through the predefined bpy.props classes. For example, the bpy.props.IntProperty class is used to add an integer property. These properties are convenient, work well, and are easy to display on the user interface panels.
To apply all transformations to an object, all its vertices must be multiplied by its global matrix, the matrix itself must be made identity.
To apply all transformations to the active mesh, we need to execute the following:
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import bpy obj = bpy.context.object matrix = obj.matrix_world.copy() for vert in obj.data.vertices: vert.co = matrix @ vert.co obj.matrix_world.identity() |
In Blender API there is a module that we can use to track the changes of any object’s properties available through the Python API. This module names “Message Bus”.
Let’s look at how we can make an event handler function to track changes to a property. For example – the location of the 3D cursor.
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