added ChangeLog.txt

2024-12-16 22:50:04 +00:00 · 2006-12-15 19:24:22 +00:00 · 2006-12-15 19:24:22 +00:00 · e30d564eab
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+Bullet Continuous Collision Detection and Physics Library
+Erwin Coumans
+
+2006 Dec 14
+	- merged contact and non-contact constraint solving into one loop, will improve stability of jointed bodies during collisions
+	- added first draft for hingeConstraint motor
+	
+2006 Dec 8, Erwin Coumans
+	- preparation for SIMD: added btAlignedAllocator and btAlignedObjectArray, to replace stl std::vector, same interface, but compatible with 16 byte alignment
+	- cleaned up dependencies in autogenerated msvc projectfiles
+	- aligned btVector3 on 16 bytes boundary, under win32. see if developers will come up with problems
+
+2006 Dec 04, Erwin Coumans
+	Added btNearCallback. This is similar to Open Dynamics Engine (ODE) dNearCallback, but important differences:
+	- contact points are persistent (lifetime more then one frame, for warmstarting/incremental contact point management)
+	- continuous collision detection, time of impact
+	Added btRigidBody::isInWorld(), returns true if btRigidBody is inside a btCollisionWorld/btDynamicsWorld derived class
+	Added angularFactor to btRigidbody, this helps some character control (no angular impulse applied)
+
+
+2006 Nov 28
+	Moved StackAlloc from EPA into LinearMath/btStackAlloc
+	renamed internal class ConcaveShape into btConcaveShape
+	added btHeightfieldTerrainShape (not completed yet)
+		
+2006 Nov 15 Nathanael Presson
+	Added EPA penetration depth algorithm, Expanding Polytope Algorithm
+	Added Pierre Terdiman penetration depth comparison/test DEMO
+	Fixed Bullet's Minkowski sampling penetration depth solver
+	Contributed by Nathanael Presson
+	
+2006 Nov 11 Francisco León Nájera
+	Added GIMPACT trimesh collision detection: concave versus concave,
+	Contributed by Francisco León Nájera
+
+2006 Nov 2
+	Minor refactoring: btCollisionObject changes from struct into class, added accessor methods
+	Force use of btMotionState to synchronize graphics transform, disabled old btRigidBody constructor that accepts btTransform
+	Renamed treshold into threshold throughout the code
+	
+2006 Oct 30
+	Enable decoupling of physics and graphics framerate using interpolation and internal fixed timestep, based on btMotionState
+	Enabled raycast vehicle demo (still needs tuning)
+	Refresh contact points, even when they are already persistent.
+	Fixed debugDraw colors (thanks pc0de for reporting)
+	Use Dispatcher in ConcaveConvexCollisionAlgorithm (so it uses the registered collision algorithm, not hardcoded convexconcave)
+	Improved performance of constraint solver by precalculating the cross product/impulse arm
+	Added collision comparison code: ODE box-box, also sphere-triangle
+	Added safety check into GJK, and an assert for AABB's that are very large
+	Fixed kinematic support (deriving velocities for animated objects)
+	Updated comparison/optional quickstep solver in Extras
+	UserCollisionAlgorithm demonstrates btTriangleMesh usage (easier trimesh compared to index array version)
+	Removed scaling from btTransform (we only want to deal with rigid transforms)
+	
+2006 Oct 4
+	Fixed minor leak in btOptimizeBVH
+	Cleanup of btRigidBody construction
+	added getW() in btQuaternion
+	assert when setLinearVelocity is called on btRigidBody
+	renamed projectfile library from collada-dom to colladadom (to make VC6 happy)
+	
+2006 Sept 27
+	Big Refactoring: renamed and moved files, create a replacement for CcdPhysicsEnvironment/CcdPhysicsController.
+	All Bullet classes in LinearMath, BulletCollision and BulletDynamics start with bt, and methods start with lowercase.
+	Moved classes into src folder, which is the only include folder needed.
+	Added 2 headerfiles in src: btBulletCollisionCommon.h and btBulletDynamicsCommon.h
+
+2006 Sept 23
+	Fixed 2 bugs, causing crashes when removing objects. Should do better unit-testing. UnionFind and 3D SAP were involved.
+	
+2006 Sept 19
+	Allow programmable friction and contact solver model. User can register their own functions for several interaction types.
+	Improved performance, and removed hardcoded maximum overlaps (switched from C-array to stl::set)
+	
+2006 Sept 16
+	Added Bullet 2.0  User Manual
+	Allow registration of custom user collision algorithms
+
+2006 Sept 10
+	Started cleaning up demos
+	
+2006 Sept 4
+	Fixed concave collision bug (caused instability/missing collisions in meshes/compounds)
+	Fixed memoryleak in OptimizedBvh, added RayTestSingle to CollisionWorld
+	Prepared for VehicleDemo
+	Increased Performance (island generation for sleeping objects took too much time)
+	Better COLLADA 1.4.1 physics conformance in ColladaDemo
+
+2006 August 11
+	Added Quake BspDemo
+	Improved CCD for compound and non-convex objects
+
+2006 August 10
+	Added per-triangle material (friction/restitution) support for non-convex meshes. See ConcaveDemo for usage.
+
+2006 August 9
+	Added CMake support (see http://cmake.org)
+	This can autogenerate makefiles, projectfiles cross platform (including MacOS X Xcode )
+	Just run cmake . in the root folder and it will autogenerate build files
+	
+2006 July 26 Erwin Coumans
+	Upgraded to COLLADA-DOM 1.4.1, latest SVN version
+	ColladaDemo can export snapshots to .dae
+	
+2006 July 24 Erwin Coumans
+	Added Compound CollisionShape support
+	(this is still low performance -> requires stackless tree-versus-tree traversal for better performance)
+
+2006 July 15 Erwin Coumans
+	Added initial support for Parallel execution (collision detection, constraint solving)
+	See ParallelPhysicsEnvironment in Extras\PhysicsInterface\CcdPhysics
+	
+2006 July 10 Erwin Coumans
+	Added MacOS X support (some build issues mainly)
+		
+2006 July 5 Erwin Coumans
+	Improved COLLADA 1.4 physics import, both COLLADA-DOM and FCollada
+
+2006 June 29 Erwin Coumans
+	Refactoring of the broadphase
+	Moved some optional files to Extras: Algebraic ccd and EPA, quickstep
+	Moved the limits on bodies/overlap to 32k and 65k
+	
+2006 June 25 Erwin Coumans
+	Added basic Collision Filtering, during broadphase
+	Allow adding meshes to the TriangleIndexVertexArray,
+	(input for TriangleMeshShape) 
+	Preparation for CompoundShape
+
+2006 June 19 Erwin Coumans
+	Added support for COLLADA Physics Import.
+	Both jam and Visual Studio can compile ColladaDemo
+
+2006 June 18 Dirk Gregorius <dirk@dirkgregorius.de>
+	Started implementing Generic6DOF joint and setup basic interface
+
+
+2006 June 17 Frank Richter <resqu@gmx.ch>
+	Bumped version in configure.ac to 1.5.6 (assuming that "1.5f" is
+	  the next version released).
+	Updated files in mk/autoconf and mk/jam with copies from CS; fixes a 
+	  GLU detection issue on MinGW.
+	Set msvc/bullet_ico.ico as the default application icon.
+	Disabled exceptions for gcc builds.
+	Applied a patch from Michael D. Adams to fix a warning with gcc.
+2006 jUNE 16 Erwin Coumans
+	Constraints now merge simulation islands.
+
+2006 May 24
+	Improved GJK accuracy, fixed GjkConvexCast issue, thanks to ~MyXa~ for reporting
+	
+2006 May 19
+	Added restitution support
+	Moved out Friction and Dynamics info from ManifoldPoint (removed logical dependency)
+	Added a void* m_userPersistentData in ManifoldPoint.
+	Added a ContactDestroyedCallback, to allow user to handle destruction of m_userPersistentData
+
+2006 May 13
+	Fixed some bugs in friction / jacobian calculations. Reported by Dirk Gregorius. Thanks!
+
+2006 May 9
+	Fixed raycasting filtering
+	Moved repository to SVN at https://svn.sourceforge.net/svnroot/bullet
+		
+2006 April 27
+	Moved raycasting to CollisionWorld, to make it more generic
+	Added basic CCD option in the CcdCollisionDemo
+	Fixed 'noResponse' mode, for triggering rigidbodies (useful for Artificial Intelligence queries)
+	Improved Bullet/ODE sample (in Extras)
+		
+2006 April 10
+	Separating Axis Test (SAT) convex hull collision detector, contribution by Simon Hobbs
+	Added SIMD SSE Math classes (for above SAT)
+	Added Mouse picking in CcdPhysicsDemo
+	Improved penetration depth estimation in MinkowskiPenetrationDepthSolver, both accuracy and performance
+	Added Hinge constraint
+	Added quickprof profiling (see http://sourceforge.net/projects/quickprof )
+		
+2006 March 21 Frank Richter <resqu@gmx.ch>
+	Removed VC manifest files.
+	Removed superfluous "grpplugins" projects.
+
+2006 March 20 Erwin Coumans
+	Clamped the acculumated impulse rather then intermediate impulse (within the iteration)
+	Use the persistent contacts for reusing the impulse
+	Separated friction and normal solving for better stability
+	Decreased the default number of iterations of the constraint solver from 10 to 4
+
+2006 March 19 Frank Richter <resqu@gmx.ch>
+	Removed a couple of CSisms from the VC projects.
+	Fixed VC include & lib paths to go to the Addtional* options
+	  instead the command line arguments.
+	Added pkgconfig support.
+
+2006 March 14 Frank Richter <resqu@gmx.ch>
+	Added support for shipped GLUT on MinGW.
+	Fixed GLUT support on MinGW.
+
+2006 March 13 Frank Richter <resqu@gmx.ch>
+	Bolted on Jam-based build system.
+	Generated VC project files.
+	Fixed GCC warnings.
+	Fixed Linux build issues.
+
+2006 March 13
+Added 3D Sweep and Prune Broadphase Collision Detection, Contribution from Simon Hobbs.
+
+2006 March 2
+	Minor change in license to ZLib/LibPNG
+	This makes it legally a bit easier to deploy on Playstation 3
+	Prepared for more generic constraints, added ConstraintsDemo
+
+2006 Feb 23
+	Rearranged files and dependencies to allow for easier standalone Collision Detection without Bullet Dynamics.
+	See Demos/CollisionInterfaceDemo and Extras/ode/ode/test/test_BulletGjk.cpp for examples how to use.
+
+
+... todo: add history
+
+2003 Initial version (continuous collision detection)