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by Daniel Stokes (kupoman) by applying a patch found in this Bullet bug report: https://code.google.com/p/bullet/issues/detail?id=525
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Remove Jamfiles and other unused files that stuck around during previous updates.
Add patches for local changes to the patches directory.
Update readme.txt, it had outdated infromation.
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===============================================
This patch adds a new "Character" BGE physics type which uses Bullet's btKinematicCharacter for simulation instead of full-blown dynamics. It is appropiate for (player-controlled) characters, for which the other physics types often result unexpected results (bouncing off walls, sliding etc.) and for which simple kinematics offers much more precision.
"Character" can be chosen like any other physics type in the "Physics" section of the properties window. Current settings for tweaking are "Step Height" (to make the object automatically climb small steps if it collides with them), "Fall Speed" (the maximum speed that the object can have when falling) and "Jump Speed", which is currently not used.
See http://projects.blender.org/tracker/?func=detail&atid=127&aid=28476&group_id=9
for sample blends and a discussion on the patch: how to use it and what influences the behavior of the character object.
Known problem: there is a crash if the "compound" option is set in the physics panel of the Character object.
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enable the setPhysicsTicRate for BGE Python
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add PhysicsConstraints.exportBulletFile(char* fileName) python command
I'll be checking the bf-committers mailing list, in case this commit broke stuff
scons needs to be updated, I'll do that in a second.
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and endif() which is no longer needed.
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The cause of this is in the bullet library, seems like some kind
of poor handling of many repeated allocations by Mac OS X, but the
allocation is unnecessary, so removed it.
Patch submitted to bullet:
http://code.google.com/p/bullet/issues/detail?id=303
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#18893, fix to getParam for generic 6dof constraints
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http://projects.blender.org/tracker/index.php?func=detail&aid=18854&group_id=9&atid=125
Thanks to Campbell for the reproduction case!
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causing instability for springs.
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Bullet SVN repo.
Now we need some cool constraint limit/motor/spring demos, such as a Forklift demo, moving robots, ragdolls etc. for Blender 2.49!
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Barton/ideasman for confirming it is ok to rename it)
+ fixed Python method, PyArg_ParseTuple already checks for errors, no returning of NULL, thanks Campbell too)
+ added linear/angular spring for each of the 6DOFs of a generic 6dof constraint. This makes the generic 6dof constraint very versatile.
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this fixes rigid body stacking in this blend file:
http://blenderartists.org/forum/showpost.php?p=1382653&postcount=102
(todo: expose this setting in World setting GUI)
Expose contact processing threshold in Advanced GUI, next to rigid body margin, called CPT.
Default to 1, makes rigid body stacking a bit more stable, smaller values makes sliding easier (at the cost of easier jittering).
Disabled for 'dynamic' objects that don't rotate, because characters etc. always need smooth sliding.
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Should make generic 6DOF constraint more useable, and rigid body stacking more stable (warmstarting was accidently switched off)
If time allows, a few more minor last-minute 2.49 fixes might follow.
Check out http://bulletphysics.com/constraintsTutorial.blend
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This commit contains a number of performance improvements for the
BGE in the Scenegraph (parent relation between objects in the
scene) and view frustrum culling.
The scenegraph improvement consists in avoiding position update
if the object has not moved since last update and the removal
of redundant updates and synchronization with the physics engine.
The view frustrum culling improvement consists in using the DBVT
broadphase facility of Bullet to build a tree of graphical objects
in the scene. The elements of the tree are Aabb boxes (Aligned
Axis Bounding Boxes) enclosing the objects. This provides good
precision in closed and opened scenes. This new culling system
is enabled by default but just in case, it can be disabled with
a button in the World settings. There is no do_version in this
commit but it will be added before the 2.49 release. For now you
must manually enable the DBVT culling option in World settings
when you open an old file.
The above improvements speed up scenegraph and culling up to 5x.
However, this performance improvement is only visible when
you have hundreds or thousands of objects.
The main interest of the DBVT tree is to allow easy occlusion
culling and automatic LOD system. This will be the object of further
improvements.
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simple missing negative index check.
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constraint visualization.
This commit doesn't add new functionality, but more updates are planned before Blender 2.49 release.
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Blender/extern/bullet2 distro.
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fixed before Blender 2.49.
In particular, the Bullet vehicle seems broken, and some soft-body demos don't work.
No new features or benefits are added yet, but a few improvements are planned before Blender 2.49 release.
Please update the build systems, and add those 3 files:
extern/bullet2/src/BulletCollision/CollisionDispatch/btActivatingCollisionAlgorithm.cpp
extern/bullet2/src/BulletCollision/CollisionDispatch/btGhostObject.cpp
extern/bullet2/src/BulletCollision/CollisionShapes/btConvexPointCloudShape.cpp
I'll watch the Blender mailing list, in case this commit causes some issues.
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still can make 2.48
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objects
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Bullet logic bug in (de)activation/island management: deactivated 'fantom' objects do merge islands, in particular when connected by constraints. (fantom = object with collision detection but no collision response).
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(except for one define 'WIN32_AVOID_SSE_WHEN_EMBEDDED_INSIDE_BLENDER')
In case someone reads those SVN logs: you can enable some extra broadphase SSE optimizations by replacing WIN32_AVOID_SSE_WHEN_EMBEDDED_INSIDE_BLENDER by WIN32 in extern/bullet2/src/BulletCollision/BroadphaseCollision/btDbvt.h
Thanks to Benoit Bolsee for the upstream patch/contribution.
Removed some obsolete files, they were just intended for comparison/testing.
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https://svn.blender.org/svnroot/bf-blender/trunk/blender + also added missing files from bullet-2.71alpha0 archiv + fixed compile errors
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recent changes in extern/bullet2 need to be re-applied, will check with Benoit. Ray tests in 0_FPS_Template.blend is broken, didn't figure out why yet.
HELP BUILD SYSTEM MAINTAINERS: Please help with updating all build systems: the newly added files need to be added. Note that the src/SoftBody has been added for future extension of real-time soft bodies.
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axis into account. Use Bullet 2.69 code to fix that bug.
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stack. BUT everytime the vertices count change, they will free themselves and internal build new (they rely on vertex count). Should be no problem anymore with e.g. subsurf modifier before collision modifier (tested). Fix: applied a patch from schlaile to get my bullet additions compiled with gcc 3.3
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btHingeConstraint::btHingeConstraint(btRigidBody& rbA,const btVector3& pivotInA,btVector3& axisInA);
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(useful for ragdolls etc)
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exotic or less exotic platforms
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- reset randseed, which should make simulations more predictable
- re-activate substeps (for more accurate simulations)
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Please make sure to have extern/bullet/src/LinearMath/btAlignedAllocator.cpp in your build, if you add the files by name, instead of wildcard *.cpp
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solver by default.
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at some stage.
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