Yade Yet Another Dynamic Engine
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engine models numerical numerical models dynamic engine discrete element method

Yade Description

Yet Another Dynamic Engine Yade is an extensible open-source framework for discrete numerical models, focused on Discrete Element Method. The computation parts are written in c++ using flexible object model, allowing independent implementation of new alogrithms and interfaces. Python can be used to create and manipulate the simulation or for postprocessing. Requirements: · Python What's New in This Release: overall: · fix many crashers, including synchronization with openGL, GUI and python · generate documentation for both python and c++ classes/functions automatically (http://yade.wikia.com/wiki/Reference_documentation) · move away from SVN repository at berlios.de to bzr at http://www.launchpad.net/yade; bug tracking and other launchpad features are being used; mailing lists migrated to launchpad functionality enhancements (apart from performance-oriented changes): · Facets (arbitrary triangulation elements) interacting with spheres, allowing to triangulate any surface · support for GTS-compatible triangulated surfaces both as predicates and facet-triangulated simulation elements · non-incremental sphere-sphere and sphere-facet contact geometry classes (Dem3DofGeom) · ConstitutiveLawDispatcher, for having multiple constitutive laws operating on different interactions · schedule to run multiple jobs at time, with different parameters (yade-multi, http://yade.wikia.com/wiki/ScriptParametricStudy) · added PhysicalParameters::blockedDOFs · periodic boundary conditions · interaction logic cleaned up · sphere packing generators (orthogonal, hexagonal, loose random, triaxially compacted; periodic coming soon) · geometry predicates to clip packing, including boolean operations on predicates · infrastructure for regression tests performance: · consistent openMP support throughout the code (InteractionDispatchers, NewtonsDampedLaw, BexContainer) (http://yade.wikia.com/wiki/Performance_Tuning#openMP) · InsertionSortCollider (PersistentSAPCollide removed) (http://yade.wikia.com/wiki/Colliders_performace) · InteractionDispatchers that reduce number of loops over interactions to one (http://yade.wikia.com/wiki/Performance_Tuning#InteractionDispatchers) · new fast container for interactions (InteractionVecMap) (http://yade.wikia.com/wiki/Performance_Tuning#Containers) · caching dispatchers, avoiding repetitive multivirtual call resolution (http://yade.wikia.com/wiki/Performance_Tuning#Dispatcher_cache) · runtime profiling information (http://yade.wikia.com/wiki/Speed_profiling_using_TimingInfo_and_TimingDeltas_classes) · avoid running collision detection at every step (http://yade.wikia.com/wiki/Insertion_Sort_Collider_Stride) · vector and quaternion classes are wrapped in python automatically (faster, avoids hand-written wrappers) · removed many python proxy classes, resulting in big speedup of python (e.g. 40 × for some operations) building: · yade can be optionally with one single plugin containing all packages. Speeds up full compilation considerably and reduces binary size several times. · files in pkg/* are picked up automatically by the build system, including linking flags · do not install headers, only plugins · fix debian-package builds and document the procedure (http://yade.wikia.com/wiki/DebianPackages), special package for docs · fix all (or most) compile-time warnings · create new top-level py/ directory for python python: · use natural syntax for class instance construction with attributes · run telnet server to make yade accessible while running (from localhost only) · save any python variables within the XML file, which will be resurrected next time (utils.saveVars, utils.loadVars) · support saving simulation to memory temporarily · functions from creating video from simulation (via snapshots, either during simulation or in the player) Documentation: · Structurized content added http://yade.wikia.com/wiki/Structurized_content · FAQ start to implement http://yade.wikia.com/wiki/FAQ

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