Which means that in each model's file it's origin point is defining the rotation point.

The offset is defined by the geometry and has to be related to its parent geometry and not to the base. The zero point of a device does not necessarily have to contain the offset related to the yoke, but it must be centered on its axis of rotation. Here is GDTF definition: The mesh of each fixture part shall be drawn around its own suspension point. What we need to do for GDTF is to separate each moving part into an individual model and adjust it's origin point and alignment. What you usually get from the manufacturer's documentation is a complete 3D drawing, made of individual parts, assembled into the shape of a real fixture. We will look at a generic moving head fixture with base, yoke and a head. I like to use Meshlab for assets preparation for GDTF, but you may choose to use other tools, like Blender, Cinema4D or some other software. How to create models of the devices is out of scope of this post, what we will look at today is how to modify and adjust existing 3D models provided by the manufacturer for use in GDTF - apply position, rotation, alignment and adjust the quality of the meshes.

Models can currently be provided in the form of 3DS files, or in the future it will be also possible to use glTF files. You can either use generic 3D models already predefined by GDTF and available in the GDTF builder, or you can provide your models. Lets see what we need to do to make our 3D files ready for GDTF. 3D models are one of the essential assets in GDTF.

Simplify 3d rotate model