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Virtual Dictionary

Individual Bone Constraints

Individual bone constraints are a method used in hierarchical skeletal modelling systems, that are in turn used to control how avatars move, allowing realistic movement asd bones swing around connecting vertex points.

Individual bone constraints are limits on that motion, defining the possible degrees of swing along each of the three axis for those points. This prevents elbows from doubling over backwards, or twirling a shoulder joint like a lasso. In so doing, it adds realism to the animation.

See Also: Hierarchical Skeletal Modelling System, Inverse Kinematics

Below, we offer a selection of links from our resource databases which may match this term.

Related Dictionary Entries for Individual Bone Constraints:

Individual Bone Constraints

Kinematic Motion Estimation


Resources in our database matching the Term Individual Bone Constraints:

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Augmented Reality Hip Replacement
Usually, creation of a prosthetic limb errs on the lighter side, sacrificing capability for lightness. This is because until now, it has not been possible to examine the surviving bone in enough detail to safely screw a prosthetic into the bone.

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Large Image Display: Prosthetic Jaw Hinging
One of the most important aspects when working with any skeletal system, is the joint where bones connect. If you don't get this area right, then bone will grind against prosthesis, and the bone is likely to take critical damage first. You inflame a joint, that did not have a problem in the first place, and spread further complications throughout the body.

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Hydroxyapatite Bone Grafts
Pennsylvania State University researcher Henry J. Donahue, Professor of Orthopaedics and Rehabilitation, Penn State College of Medicine, has found a use for the inorganic material hydroxyapatite, in covering sterilized implants so that they form a natural bond with on-site bone, fusing together over time.

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Holograms can reveal brain's inner workings
Usually with imaging of the inner workings of the brain, we cannot get down as far as the individual neurons. That's a pity because if we could image individual neurons during the firing process, it would add another tool into our toolkit for working out at a fine level, exactly how neurons are assigned into functions.

Whilst over 30 years old now, this book is one of those whose usefulness is never likely to fade. It is a physics book, dealing with the mathematics and physical constraints of getting any rigid body jointed system to move as desired. Designed initially with robots in mind, long before the avatar, the maths contained within is ideal for grounding on ragdoll physics as used with avatars.

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VR Interfaces: The Webcam/EyeToy
In a paradigm where overcoming physical constraints is key, a webcam may seem a very odd VR interface device. However, what lays true for one section of individuals, dows not always lay true for another. The PS2?s EyeToy has done much in the cause of using physical body form as an input device.

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Increasing Access to Public Augmented Reality Units: The Human beast Problem
The human element is the main stopping point for augmented reality technologies. Humans are not really that civilised in general. Civilisation is imposed on most, by society. Taken out of society's constraints, or drunk, or high, or simply angry, the average street passer-by becomes in essence, a wild animal. They are going to break things, whatever they can grasp.


Industry News containing the Term Individual Bone Constraints:

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Technique could eliminate need for bone grafts and transplants

A gene therapy that spurs the growth of tooth-supporting bone could make dental work far more pleasant.

The technique could eliminate the need to ...

Scientists are closer to understanding how to grow replacement bones with stem cell technology, thanks to research published today in the journal Nature Materials.

Many scientists are currently trying to create bone-like mate...

Stryker Corp. has announced the clinical release of a different kind of prosthetic interface, one that bears watching. Unlike traditional prosthetic-to-bone fusions, Stryker?s latest titanium mounting is pockmarked with holes and gaps, cove...

Georgia Institute of Technology bioengineers have demonstrated a way to grow tendons that gradually "fade" to bone at one end, strengthening the ends of the attachment

The technique uses a gene that triggers the fibroblast ...

Artificial bone marrow that can continuously make red and white blood cells has been created in a University of Michigan lab.

The substance grows on a 3-D scaffold that mimics the tissues supporting bone marrow in the body. ...