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Skeletal animation or rigging is a technique in computer animation in which a character (or other articulated object) is represented in two parts: a polygonal or parametric mesh representation of the surface of the object, and a hierarchical set of interconnected parts (called joints or bones, and collectively forming the skeleton), a virtual ...
Mixamo also provides an online, automatic model rigging service known as the Auto-Rigger, which was the industry's first online rigging service. The AutoRigger applies machine learning to understand where the limbs of a 3D model are and to insert a "skeleton", or rig, into the 3D model as well as calculating the skinning weights.
The T-pose is primarily used as the default armature pose for skeletal animation in 3D software, which is then manipulated to create animation. The purpose of the T-pose relates to the important elements of the body being axis-aligned, thereby making it easier to rig the model for animation, physics, and other controls.
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An armature used in stop-motion animation is an articulated metal, wire or even wooden figure covered with material to build the character, but can be made to hold poses for extended periods of time. In 3D computer animation , the analogous concept is the skeleton or rig used in skeletal animation .
Physically Based Rigging for Deformable Characters, 2005 SIGGRAPH. Authors: Steve Capell, Matthew Burkhart, Brian Curless, Tom Duchamp and Zoran Popović. Skeleton-driven Deformation - lecture on physically-based modelling, simulation and animation, 2005, Ming C. Lin, University of North Carolina, USA.
Often to speed up the keyframe animation process a control rig is used by the animation. The control rig represents a higher level of abstraction that can act on multiple morph targets coefficients or bones at the same time. For example, a "smile" control can act simultaneously on the mouth shape curving up and the eyes squinting.
Skeleton programming mimics this, but differs in the way that it is commonly written in an integrated development environment, or text editors. This assists the further development of the program after the initial design stage. Skeleton programs also allow for simplistic functions to operate, if run.