Real-Time Physics Simulation Forum

actually including ALL bullet files into my project eliminates the problem.
which is fine, but feels a bit strange. The compiler settings between the projects
were identical, I checked multiple times, so it remains a mystery why the bad_alloc
occured. anyway, this workaround solves the problem.

J

hi, after moving the physics code into a separate library of my project, all of a sudden I get a bad alloc on "new btCollisionDispatcher( ... )" my project setup in msvc2008 was this: -"main project" main.cpp <- calls s_config = new btDefaultCollisionConfiguration(); s_dispatcher...

hi, I should have seen before that there's another thread on this topic, http://continuousphysics.com/Bullet/phpBB3/viewtopic.php?f=9&t=3192&sid=02de850356cb58c65995a01b1a7d0566 and it seems to me beaelp is right in stating that the getOpenGLSubMatrix gives the transpose of what's expected b...

Actually, the "transposed" version is correct, since the OpenGL convention of storing matrices is row-major, as opposed to the common column-major. sorry, but this is not true, see the OpenGL FAQ on http://www.opengl.org/resources/faq/technical/transformations.htm I (accidentally) started...

just a followup on my previous post, I'm getting more & more confused here. if btMatrix3x3 stores the orthogonal vectors of a reference frame in row-major order, like this: m_el[0] = btVector3( xx, xy, xz ); m_el[1] = btVector3( yx, yy, yz ); m_el[2] = btVector3( zx, zy, zz ); then why on EARTH ...

Hi, Thanks for your answer. What I can't find is the code in bullet for btVector3 * btTransform then. I actually get a compiler error on doing vector * matrix: btTransform trans = m_connA->getRenderNode()->getLocal(); btVector3 vec = m_connA->getConnectionPoint().getOrigin(); glVertex3fv( vec * tran...

so what you're saying is that m_basis[0] gives me the first column, right ? I never really get my head around that. in an OpenGL matrix, it's like this, (column-major) xx, yx, zx, tx xy, yy, zy, ty xz, yz, zz, tz xw, yw, zw, tw so m_basis[0] should correspond to Vector3( xx, xy, xz ) giving me the x...

Hi, Am I totally confused or do the () and * operators of btTransform and btMatrix3x3 give the inverse transform ? /**@brief Return the transform of the vector */ SIMD_FORCE_INLINE btVector3 operator()(const btVector3& x) const { return btVector3(m_basis[0].dot(x) + m_origin.x(), m_basis[1].dot(...

Hi there, I'm running into a curious problem when compiling in release mode. everything works fine when compiling debug, but when I switch to release mode, MSVC8 doesnt find the removeCollisionObject function. >Canvas.obj : error LNK2001: unresolved external symbol "public: void __thiscall btCo...

irony though that I've just written 3 functions
in which I had to fill a just-instantiated transform
with other values than Identity personally, I don't
mind the overhead, but setting the identity on
construction with a (static) identity tranform works fine too.
in all, my point is moot.

J

i understand, though I would consider instantiating
a btTransform a non-time-critical operation.
Having to set the identity after instantiation
would give the same overhead, and is normally
expected if the transform is subsequently used
for multiplication,

J

Hi there,

with each new release I keep changing the
default btTransform contructor to this:

btTransform() { setIdentity(); }

may I suggest this as a feature ?

Jochem van der Spek

yes, they are.

Hi there, I'm having some issues with blocks of ~0.7 by 0.7 by 0.1 meters falling flat onto a floor from a height of 1.2 meters, with gravity set to ( 0,0, -10 ), in my z-up world. as you can see in the images taken from the simulation with timestep 1.0/60.0 ( maxSubSteps = 20 ) the objects penetrat...

hi again, I'm having some trouble with the btAlignedObjectArray, when I'm returning one from a function, after some swapping,pushing, etc. my code crashes in aligned_free_dbg. I have no idea what's going on. I dont have dynamic data allocation going on, so I wonder if it's a bug in btAlignedObjectAr...