The position of the point from which we look at the scene in the 3D viewport area can be controlled through the Blender Python API. We can read the coordinates of this point and the direction of view from the viewport, and also set the values we need for them.
Not all actions made with the Blender Python API cause Blender to immediately redraw the screen. Therefore, quite often it is necessary to force a screen refresh so that the user immediately sees all the changes.
To resolve conflicts between add-ons in Blender, it may be necessary to know if Blender base system operator has been overridden with a custom operator in some third-party add-on.
Checking if system operator was overridden with customRead More »
Using the gpu module from the Blender Python API, we can draw not only images on the 3D viewport area, but also print arbitrary text. Printing text is carried out using the blf module – a wrapper over OpenGL.
Information about the mesh vertices colors is stored in its vertex_colors property, as well as in its color_attributes property. To remove vertex color data from the mesh, we need to clear these mesh properties.
To execute an operator from a context that was not intended for it correctly, it is necessary to override the context for it using bpy.context.temp_override.() selected objects. However, using temp_override, we can override not only the context of the operator call, but also, for example, the stack of selected objects.
Overriding the selected objects list for the transform.translate operatorRead More »
Mesh vertices don’t have a “color” property. Vertex colors specified by coloring in Vertex Paint mode or any other way are stored in an attribute – a separate list of values. To select a vertex by the color assigned to it in an attribute, we need to associate the attribute’s index with the vertex index.
The common icons used in the UI and operators are packed inside Blender, and therefore we cannot edit or add new icons without a complete recompile of Blender. Icons for toolbars are not tied to the Blender assembly, they are stored in separate files, and we can replace or create and add new toolbar icons.
The ID of the tool icons correspond to the names of the files in which they are stored and they can be obtained simply by looking in the appropriate Blender folder. However, icon IDs can also be obtained through the Blender Python API with the help ot the ToolSelectPanelHelper class.
In Blender version 2.8x and later, a new toolbar has appeared, located in the 3D viewport area on the left side. We can create custom tools and add them to this panel using the Blender Python API.
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