Selecting scene camera with shortcode
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.
Content on Patreon
B3D Interplanety discord server
B3D Interplanety discord server.
The community about Blender 3D, its API, programming, scripting, and add-ons development.
Questions that are not directly related to the topic of the blog posts are also best asked not in post comments, but through the discord server.
Blender add-on “Select-UP” v. 1.2.0.
Buy on Blender Market
Buy on GumroadOperators for globally hiding objects in all project scenes
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 »
Cotton-Candy-Zanne
Cotton-Candy-Zanne by Juan Carlos Montes
Showing an object dynamic property on a UI panel
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.
Blender add-on “AniCam” v. 1.2.0.
Blender 2.93.4 LTS release
The Blender 2.93.4 LTS release is now enabled for downloading on the official Blender site.
31 issues were fixed in this version.
Blender add-on: Parent to Empty
Parent to Empty – Blender add-on for quickly parenting selected objects to an empty.
Delete Geometry Node
Geometry Nodes has a node that allows us to remove required vertices from a mesh. This is the “Delete Geometry” node.
Difference between the “eye” and the “monitor” icons when hiding objects
To hide objects in the 3D Viewport window, we can click the “eye” icon in the outliner near the desired object name (press the “H” shortcode), or we can click the icon with the “monitor” image. In both cases, the object will be hidden.
So, what’s the difference between these two variants?
It is very simple:
Clicking on the “eye” icon hides objects only in the currently active scene of the blend file.
Pressing the icon with the “monitor” hides objects in all scenes of the blend file at once.
Using UV coordinates for working with mesh geometry
With the coordinates of the UV, we can manipulate not only materials but also the geometry of the mesh itself. We can connect the UV coordinates with the mesh geometry using “Geometry Nodes” in Blender.
Using UV coordinates for working with mesh geometryRead More »
Mixing materials by the UV coordinates
UV coordinates can be used for mixing materials directly on the mesh. This can be useful if, for example, the shape of the mesh is cylindrical or closed or the UV boundaries correspond to the boundaries of the mesh.
May the Suzanne be with you
May the Suzanne be with you by GurJas Studios
How to apply transformations to a mesh with the Blender Python API
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:
|
1 2 3 4 5 6 7 |
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() |
Message Bus
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.
Blender 2.83.17 LTS release
The Blender 2.83.17 LTS release is enabled for downloading on the official Blender site.
8 bugs were fixed in this version.
Dawn of the Planet of the Blender
Poster by Christophe GUIVANT.
How to change gizmo size
To change the size of the gizmo displayed in the “3D Viewport” window:
- Open the “Preferences” window
- Switch to the “Viewport” tab
- In the “Display” submenu, change the slider value of the “Gizmo Size” item
Blender 2.93.2 LTS release
The Blender 2.93.2 LTS release is now enabled for downloading on the official Blender site.
51 issues were fixed in this version.
Compiling a video from a sequence of frames using the FFmpeg codec
Rendering directly to a video file in Blender is not always useful. More often, a sequence (a set) of frames is received after render, which then, for example, after additional post-processing, must be assembled to the final video file.
We can compile a sequence of frames into a video with Blender itself, with the Visual Screen Editor (VSE). Or we can use third-party codecs, for example, FFmpeg.
Compiling a video from a sequence of frames using the FFmpeg codecRead More »
Origin to active
A simple script for transferring the origin of all selected objects to the origin of the active object.
Setting colors for Blender collections with the Python API
Since Blender 2.9, the ability to assign color tags has been added for collections. Collection with such tag is displaying in a specific color in the outliner.
The collection color tag value is stored in its “color_tag” property. To change the color label of a collection, we need to assign a certain value to this property.
For example, to mark the current active collection in green:
|
1 |
bpy.context.collection.color_tag = 'COLOR_04' |
Setting colors for Blender collections with the Python APIRead More »