Ragdoll physics is a form of interconnected rigid physics system in which avatar and other multi-part objects consist of a series of rigid bodies chained together by flexible joints. The ragdoll aspect is because these systems do not account for muscle resistance, or joint stiffness, so the joints flop around like they are made of rags. But, using this physics system, realistic-ish body movements become possible, without pre-scripting.
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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.
A worthwhile look at the benefits of using C++ over C for complex tasks, such as physics.
There are a large number of new developers coming into the market for physics engines that need help through this complex process. Current introductory books are inadequate; they don't bring enough real-world programming experience to the task. There is a need for an introductory book on game physics with solid coding guidance but which limits the math content. This book tries to fill that void.
The PhysX SDK and related hardware acceleration is designed as a method for realtime physics calculations, rather than expecting every developer to code from scratch.
The Matrix distorts when a freak corruption of data creates a no-physics zone in a thin layer paralleling the floor. An advanced replication of gravity warping accidents that happen in ActiveWorlds and Second Life, today.
Running is not as simple a process as it seems at first glance. The physics of this type of movement is very different to the physics of walking, and as a result the leg and body movements are radically different. If we wish to recreate realistic running in either embodied robotic form, or via sequences for VR, then we need to understand this process intimately.
Good paper by lone game developer Jeff Lander on creating a physice simulator.
German researchers develop a simulation that approaches fluid dynamics from a new angle. Considering the makeup of the solid structures the droplets hit, as every bit as important as the physics of the droplet itself.
An international team led by the Johns Hopkins University Applied Physics Laboratory (APL) in the US, has developed a prototype of the first fully integrated prosthetic arm that can be controlled naturally, including the provision of sensory feedback and allows for eight degrees of freedom. This is an order of magnitude beyond previous efforts, including the haptic arm of Claudia Mitchell.
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Scientists studying how bacteria under stress collectively weigh and initiate different survival strategies say they have gained new insights into how humans make strategic decisions that affect their health, wealth and the fate of others i...
In just over a day, a powerful computer program accomplished a feat that took physicists centuries to complete: extrapolating the laws of motion from a pendulum's swings.
Developed by Cornell researchers, the program deduced...
A pillar of physics - that nothing can go faster than the speed of light - appears to be smashed by an oddball subatomic particle that has apparently made a giant end run around Albert Einstein's theories.
Scientists at the ...
New UBC research has literally and figuratively poked holes in single-band Hubbard physics--a model that has been used to predict and calculate the behavior of high-temperature superconductors for 20 years.
The findings are t...
Robot soccer players from Carnegie Mellon University competing in this month's RoboCup 2010 world championship in Singapore should be able to out-dribble their opponents, thanks to a new algorithm that helps them to predict the ball's beh...