physX SDK是可以免費使用的，只要注冊就可以下載。網(wǎng)址，http://www.ageia.com/
Developers can now download v2.6 of the AGEIA PhysX SDK which adds significant functionality and performance improvements to previous versions, including fluid and cloth hardware support advancements.
This SDK is available for all users who register at devsupport.ageia.com
網(wǎng)址，http://www.ode.org/
ODE is an open source, high performance library for simulating rigid body dynamics. It is fully featured, stable, mature and platform independent with an easy to use C/C++ API. It has advanced joint types and integrated collision detection with friction. ODE is useful for simulating vehicles, objects in virtual reality environments and virtual creatures. It is currently used in many computer games, 3D authoring tools and simulation tools.
網(wǎng)址，http://www.havok.com/
要license的
If you are interested in a free Havok Evaluation Copy, fill out the form below and a representative will contact you promptly. The Evaluation Copy is for professional game developers with offices in North America, Europe or Japan.
*Because we provide Havok and technical support during the evaluation period, we require signed nondisclosure and licensing agreements. We look forward to hearing from you!
If you are interested in Havok for simulation and design not in the games space, please fill out the form below and you will be contacted shortly by a member of the business development team.
Click here to view our Evaluation License.
Online Programming for All Libraries，網(wǎng)址，http://www.opal-online.org/
OPAL is an international collaborative effort by libraries of all types to provide web-based programs and training for library users and library staff members.
Everyone is welcome to participate in OPAL programs. Usually there is no need to register. Nearly all OPAL programs are offered free of charge to participants.
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