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This commit is an attempt to improve collisions between moving Bullet rigid bodies using (concave) triangle mesh bounds.
Instead of using Gimpact, this we create a btCompoundShape with child shape tetrahedra derived from the surface triangles.
For each triangle, we add a fourth vertex using the centroid, shifting inwards using the triangle normal.
If the centroid hits an internal triangle, we stop. The default depth could be exposed as 'advanced' setting in the user interface.
This solution will be a slower than the original/gimpact solution, but a bit more reliable.
In the future, it is better to add HACD, convex decomposition to Blender, for moving concave meshes.
See http://kmamou.blogspot.com and the Bullet SDK's Demos/ConvexDecompositionDemo.
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* Add access to the original indices for vertices
* Add a very simple C API for convex hull
* Add this patch to the patches folder and update readme.txt
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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Update readme.txt, it had outdated infromation.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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- Remove strict flags from files, which are using FFmpeg stuff
We're still using some symbols which are marked as deprecated.
Ideally, we shall switch to new API, but it's a bit larger challenge
because we don't want to break compatibility withotu actual need.
- Replace MAKE_ID with BT_MAKE_ID in bullet library.
This is needed to prevent re-definition of MAKE_ID in bullet library.
Seems it's only used to read blender files, so should be quite safe
change.
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and looks like -fpermissive is used in linux too
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to ints. All cases found were harmless and the error behaviour could be turned off by the -fpermissive flag but I'd rather keep that off to detect any real problems should they arise.
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slight modifications.
Thanks!
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extern/bullet2, it will propagate to the Bullet soon from here:
https://www.assembla.com/code/bullet3/subversion/nodes
Thanks to Campbell for letting me know
Fixed described by Sean here:
http://stackoverflow.com/questions/818535/how-can-i-set-all-bits-to-1-in-a-binary-number-of-an-unknown-size
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fix in Bullet. I will also report the fix to Erwin so that it can be added to next Bullet version.
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http://markmail.org/message/fp7ozcywxum3ar7n
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Change OURPLATFORM from "linux<major_version>" to simple "linux".
Since new policy for linux kernel versions that major version in
platform doesn't make much sense for building rules so the same
rules could be used for both of linux2 and linux3 now/
Tested on both of linux2 and linux3 systems.
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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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fixes around license blocks
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the 4th component of the vector is used later when copying the vector.
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and endif() which is no longer needed.
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fixed some warnings.
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Reported by dobz116
This appears to happen only on 64bit Windows. An issue for this part of code was
reported at http://code.google.com/p/bullet/issues/detail?id=204 and fixed at
http://code.google.com/p/bullet/source/detail?r=1650 . The code change also fixes
the crash we experience: merged changes.
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commit. This patch has been approved already and will be in Bullet 2.76.
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KX_GameObject::rayCast(). Details in PyDoc.
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Upped the priority for the softbody module so that gcc linkers (mingw, linux-gcc) would be able to resolve the dependencies. MSVC still worked though.
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modifications to Bullet have been reported to Bullet forum. Note: welding is completely disabled on soft body as it breaks the relationship between the soft body collision shape and the graphics mesh without bringing any additional stability (the reverse actually).
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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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should go ok.
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Was annoying to use a different editor for cmake only.
theeth says this should be ok with gsoc and merges from branches.
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* bring back 'player' libtype, after investigation with ideasman.
scons/mingw works nicely, for some reason msvc fails to link still, will look further into it.
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* ensure all SConscripts are ready for win64-vc (where necessary).
* ensure we have proper _DEBUG flag for Python when we're doing a debug build.
* some cleaning up of linking etc.
* ensure /EHsc is there for game engine modules.
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svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r19820:HEAD
Notes:
* Game and sequencer RNA, and sequencer header are now out of date
a bit after changes in trunk.
* I didn't know how to port these bugfixes, most likely they are
not needed anymore.
* Fix "duplicate strip" always increase the user count for ipo.
* IPO pinning on sequencer strips was lost during Undo.
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-r19323:HEAD
Notes:
* blenderbuttons and ICON_SNAP_PEEL_OBJECT were not merged.
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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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bugfix in bullet
Caused by using the index from closestAxis4 before checking its -1
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-r18677:19317
Notes:
* Sequence transform strip uses G.scene global, this is commented
out now, should be fixed.
* Etch-a-ton code was most difficult to merge. The files already in
2.5 got merged, but no new files were added. Calls to these files
are commented out with "XXX etch-a-ton". editarmature.c and
transform_snap.c were complex to merge. Martin, please check?
* Game engine compiles and links again here for scons/make/cmake
(player still fails to link).
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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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* add preliminary support for building Blender on 64bit Windows with _msvc_. The SConstruct should automatically detect if you are on a 64bit Windows and if you have that 64bit build is assumed. If you're not, 32bit build is assumed.
NOTE: this is still very much wip, so your mileage may vary. Do please report on b25 taskforce ML in case of trouble.
NOTE2: many of the libs are being linked in statically
NOTE3: hopefully I didn't break anything for other build platforms (mingw, linux, osx).
NOTE4: comes after NOTE3
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