In some cases, it may be necessary to determine whether a certain object is currently visible in the 3D viewport area in Blender or not. We can determine the visibility of an object in a viewport with the Blender Python API using the location_3d_to_region_2d function of the view3d_utils module.
Checking object visibility in the 3D Viewport areaRead More »
The Blender Python API does not provide a special handlers for tracking View Layers switching. However, if it needs to perform some action when switching them, we can track their switching using the message bus.
With the Blender Python API we can manage not only scene objects, but also the view from the 3D viewport area, The viewport has a matrix with which the viewport can be moved to the desired position.
Controlling 3D Viewport with the Blender Python APIRead More »
The “range” function is used to transfer a value from one range, for example, from 0 to 1000, to another, for example, from -1 to 1. To quickly get a value in different ranges, we can define a simple function.
To get the direction vector of a 3D viewport, for example, to determine the location of the viewport relative to some object in the scene, we can use the region_2d_to_vector_3d function from the view3d_utils module.
Using the gpu module from the Blender Python API, we can draw images in the scene or viewport space. Images can be drawn in the scene coordinate system for intuitive mesh interaction, or in the viewport coordinate system to create custom UI elements.
Drawing an image with the gpu module in scene and viewport spaceRead More »
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